Perfetto - System profiling, app tracing and trace analysis

Tables diagram

Tracks tables

graph TD subgraph Tracks TrackTable["track"] CounterTrackTable["counter_track"] CpuCounterTrackTable["cpu_counter_track"] CpuTrackTable["cpu_track"] EnergyCounterTrackTable["energy_counter_track"] UidCounterTrackTable["uid_counter_track"] EnergyPerUidCounterTrackTable["energy_per_uid_counter_track"] GpuCounterTrackTable["gpu_counter_track"] GpuTrackTable["gpu_track"] IrqCounterTrackTable["irq_counter_track"] PerfCounterTrackTable["perf_counter_track"] ProcessCounterTrackTable["process_counter_track"] ProcessTrackTable["process_track"] SoftirqCounterTrackTable["softirq_counter_track"] ThreadCounterTrackTable["thread_counter_track"] ThreadTrackTable["thread_track"] end TrackTable["track"] -. parent_id .-> TrackTable["track"] TrackTable["track"] -. source_arg_set_id .-> ArgTable["args"] CounterTrackTable["counter_track"] --> TrackTable["track"] CpuCounterTrackTable["cpu_counter_track"] --> CounterTrackTable["counter_track"] CpuTrackTable["cpu_track"] --> TrackTable["track"] EnergyCounterTrackTable["energy_counter_track"] --> CounterTrackTable["counter_track"] UidCounterTrackTable["uid_counter_track"] --> CounterTrackTable["counter_track"] EnergyPerUidCounterTrackTable["energy_per_uid_counter_track"] --> UidCounterTrackTable["uid_counter_track"] GpuCounterTrackTable["gpu_counter_track"] --> CounterTrackTable["counter_track"] GpuTrackTable["gpu_track"] --> TrackTable["track"] IrqCounterTrackTable["irq_counter_track"] --> CounterTrackTable["counter_track"] PerfCounterTrackTable["perf_counter_track"] --> CounterTrackTable["counter_track"] ProcessCounterTrackTable["process_counter_track"] --> CounterTrackTable["counter_track"] ProcessCounterTrackTable["process_counter_track"] -. upid .-> ProcessTable["process"] ProcessTrackTable["process_track"] --> TrackTable["track"] ProcessTrackTable["process_track"] -. upid .-> ProcessTable["process"] SoftirqCounterTrackTable["softirq_counter_track"] --> CounterTrackTable["counter_track"] ThreadCounterTrackTable["thread_counter_track"] --> CounterTrackTable["counter_track"] ThreadCounterTrackTable["thread_counter_track"] -. utid .-> ThreadTable["thread"] ThreadTrackTable["thread_track"] --> TrackTable["track"] ThreadTrackTable["thread_track"] -. utid .-> ThreadTable["thread"] click TrackTable "#track" click TrackTable "#track" click ArgTable "#args" click CounterTrackTable "#counter_track" click CpuCounterTrackTable "#cpu_counter_track" click CpuTrackTable "#cpu_track" click EnergyCounterTrackTable "#energy_counter_track" click UidCounterTrackTable "#uid_counter_track" click EnergyPerUidCounterTrackTable "#energy_per_uid_counter_track" click GpuCounterTrackTable "#gpu_counter_track" click GpuTrackTable "#gpu_track" click IrqCounterTrackTable "#irq_counter_track" click PerfCounterTrackTable "#perf_counter_track" click ProcessCounterTrackTable "#process_counter_track" click ProcessTable "#process" click ProcessTrackTable "#process_track" click ProcessTable "#process" click SoftirqCounterTrackTable "#softirq_counter_track" click ThreadCounterTrackTable "#thread_counter_track" click ThreadTable "#thread" click ThreadTrackTable "#thread_track" click ThreadTable "#thread"

Events tables

graph TD subgraph Events AndroidLogTable["android_logs"] AndroidDumpstateTable["android_dumpstate"] CounterTable["counter"] SliceTable["slice"] RawTable["raw"] FtraceEventTable["ftrace_event"] SchedSliceTable["sched_slice"] SpuriousSchedWakeupTable["spurious_sched_wakeup"] ThreadStateTable["thread_state"] ActualFrameTimelineSliceTable["actual_frame_timeline_slice"] ExpectedFrameTimelineSliceTable["expected_frame_timeline_slice"] ExperimentalFlatSliceTable["experimental_flat_slice"] GpuSliceTable["gpu_slice"] GraphicsFrameSliceTable["frame_slice"] end AndroidLogTable["android_logs"] -. utid .-> ThreadTable["thread"] CounterTable["counter"] -. track_id .-> CounterTrackTable["counter_track"] SliceTable["slice"] -. track_id .-> TrackTable["track"] SliceTable["slice"] -. parent_id .-> SliceTable["slice"] SliceTable["slice"] -. arg_set_id .-> ArgTable["args"] RawTable["raw"] -. utid .-> ThreadTable["thread"] RawTable["raw"] -. arg_set_id .-> ArgTable["args"] FtraceEventTable["ftrace_event"] --> RawTable["raw"] ActualFrameTimelineSliceTable["actual_frame_timeline_slice"] --> SliceTable["slice"] ExpectedFrameTimelineSliceTable["expected_frame_timeline_slice"] --> SliceTable["slice"] ExperimentalFlatSliceTable["experimental_flat_slice"] -. track_id .-> TrackTable["track"] ExperimentalFlatSliceTable["experimental_flat_slice"] -. arg_set_id .-> ArgTable["args"] ExperimentalFlatSliceTable["experimental_flat_slice"] -. source_id .-> SliceTable["slice"] GpuSliceTable["gpu_slice"] --> SliceTable["slice"] GraphicsFrameSliceTable["frame_slice"] --> SliceTable["slice"] click AndroidLogTable "#android_logs" click ThreadTable "#thread" click AndroidDumpstateTable "#android_dumpstate" click CounterTable "#counter" click CounterTrackTable "#counter_track" click SliceTable "#slice" click TrackTable "#track" click SliceTable "#slice" click ArgTable "#args" click RawTable "#raw" click ThreadTable "#thread" click ArgTable "#args" click FtraceEventTable "#ftrace_event" click SchedSliceTable "#sched_slice" click SpuriousSchedWakeupTable "#spurious_sched_wakeup" click ThreadStateTable "#thread_state" click ActualFrameTimelineSliceTable "#actual_frame_timeline_slice" click ExpectedFrameTimelineSliceTable "#expected_frame_timeline_slice" click ExperimentalFlatSliceTable "#experimental_flat_slice" click TrackTable "#track" click ArgTable "#args" click SliceTable "#slice" click GpuSliceTable "#gpu_slice" click GraphicsFrameSliceTable "#frame_slice"

ART Heap Graphs tables

graph TD subgraph ART Heap Graphs HeapGraphClassTable["heap_graph_class"] HeapGraphObjectTable["heap_graph_object"] HeapGraphReferenceTable["heap_graph_reference"] end HeapGraphClassTable["heap_graph_class"] -. superclass_id .-> HeapGraphClassTable["heap_graph_class"] HeapGraphObjectTable["heap_graph_object"] -. type_id .-> HeapGraphClassTable["heap_graph_class"] HeapGraphReferenceTable["heap_graph_reference"] -. owner_id .-> HeapGraphObjectTable["heap_graph_object"] HeapGraphReferenceTable["heap_graph_reference"] -. owned_id .-> HeapGraphObjectTable["heap_graph_object"] click HeapGraphClassTable "#heap_graph_class" click HeapGraphClassTable "#heap_graph_class" click HeapGraphObjectTable "#heap_graph_object" click HeapGraphClassTable "#heap_graph_class" click HeapGraphReferenceTable "#heap_graph_reference" click HeapGraphObjectTable "#heap_graph_object" click HeapGraphObjectTable "#heap_graph_object"

Callstack profilers tables

graph TD subgraph Callstack profilers StackProfileMappingTable["stack_profile_mapping"] StackProfileFrameTable["stack_profile_frame"] StackProfileCallsiteTable["stack_profile_callsite"] StackSampleTable["stack_sample"] CpuProfileStackSampleTable["cpu_profile_stack_sample"] ExperimentalFlamegraphNodesTable["experimental_flamegraph_nodes"] HeapProfileAllocationTable["heap_profile_allocation"] PerfSampleTable["perf_sample"] ProfilerSmapsTable["profiler_smaps"] SymbolTable["stack_profile_symbol"] end StackProfileFrameTable["stack_profile_frame"] -. mapping .-> StackProfileMappingTable["stack_profile_mapping"] StackProfileCallsiteTable["stack_profile_callsite"] -. parent_id .-> StackProfileCallsiteTable["stack_profile_callsite"] StackProfileCallsiteTable["stack_profile_callsite"] -. frame_id .-> StackProfileFrameTable["stack_profile_frame"] StackSampleTable["stack_sample"] -. callsite_id .-> StackProfileCallsiteTable["stack_profile_callsite"] CpuProfileStackSampleTable["cpu_profile_stack_sample"] --> StackSampleTable["stack_sample"] ExperimentalFlamegraphNodesTable["experimental_flamegraph_nodes"] -. parent_id .-> ExperimentalFlamegraphNodesTable["experimental_flamegraph_nodes"] HeapProfileAllocationTable["heap_profile_allocation"] -. callsite_id .-> StackProfileCallsiteTable["stack_profile_callsite"] PerfSampleTable["perf_sample"] -. callsite_id .-> StackProfileCallsiteTable["stack_profile_callsite"] click StackProfileMappingTable "#stack_profile_mapping" click StackProfileFrameTable "#stack_profile_frame" click StackProfileMappingTable "#stack_profile_mapping" click StackProfileCallsiteTable "#stack_profile_callsite" click StackProfileCallsiteTable "#stack_profile_callsite" click StackProfileFrameTable "#stack_profile_frame" click StackSampleTable "#stack_sample" click StackProfileCallsiteTable "#stack_profile_callsite" click CpuProfileStackSampleTable "#cpu_profile_stack_sample" click ExperimentalFlamegraphNodesTable "#experimental_flamegraph_nodes" click ExperimentalFlamegraphNodesTable "#experimental_flamegraph_nodes" click HeapProfileAllocationTable "#heap_profile_allocation" click StackProfileCallsiteTable "#stack_profile_callsite" click PerfSampleTable "#perf_sample" click StackProfileCallsiteTable "#stack_profile_callsite" click ProfilerSmapsTable "#profiler_smaps" click SymbolTable "#stack_profile_symbol"

Memory Snapshots tables

graph TD subgraph Memory Snapshots MemorySnapshotTable["memory_snapshot"] ProcessMemorySnapshotTable["process_memory_snapshot"] MemorySnapshotNodeTable["memory_snapshot_node"] MemorySnapshotEdgeTable["memory_snapshot_edge"] end MemorySnapshotTable["memory_snapshot"] -. track_id .-> TrackTable["track"] ProcessMemorySnapshotTable["process_memory_snapshot"] -. snapshot_id .-> MemorySnapshotTable["memory_snapshot"] MemorySnapshotNodeTable["memory_snapshot_node"] -. process_snapshot_id .-> ProcessMemorySnapshotTable["process_memory_snapshot"] MemorySnapshotNodeTable["memory_snapshot_node"] -. parent_node_id .-> MemorySnapshotNodeTable["memory_snapshot_node"] MemorySnapshotEdgeTable["memory_snapshot_edge"] -. source_node_id .-> MemorySnapshotNodeTable["memory_snapshot_node"] MemorySnapshotEdgeTable["memory_snapshot_edge"] -. target_node_id .-> MemorySnapshotNodeTable["memory_snapshot_node"] click MemorySnapshotTable "#memory_snapshot" click TrackTable "#track" click ProcessMemorySnapshotTable "#process_memory_snapshot" click MemorySnapshotTable "#memory_snapshot" click MemorySnapshotNodeTable "#memory_snapshot_node" click ProcessMemorySnapshotTable "#process_memory_snapshot" click MemorySnapshotNodeTable "#memory_snapshot_node" click MemorySnapshotEdgeTable "#memory_snapshot_edge" click MemorySnapshotNodeTable "#memory_snapshot_node" click MemorySnapshotNodeTable "#memory_snapshot_node"

Misc tables

graph TD subgraph Misc ProcessTable["process"] ThreadTable["thread"] AndroidGameInterventionListTable["android_game_intervention_list"] FlowTable["flow"] ArgTable["args"] ClockSnapshotTable["clock_snapshot"] CpuTable["cpu"] CpuFreqTable["cpu_freq"] ExpMissingChromeProcTable["experimental_missing_chrome_processes"] FiledescriptorTable["filedescriptor"] MetadataTable["metadata"] GpuCounterGroupTable["gpu_counter_group"] PackageListTable["package_list"] VulkanMemoryAllocationsTable["vulkan_memory_allocations"] ExperimentalProtoPathTable["experimental_proto_path"] ExperimentalProtoContentTable["experimental_proto_content"] end ProcessTable["process"] -. parent_upid .-> ProcessTable["process"] ProcessTable["process"] -. uid .-> PackageListTable["package_list"] ProcessTable["process"] -. arg_set_id .-> ArgTable["args"] ThreadTable["thread"] -. upid .-> ProcessTable["process"] FlowTable["flow"] -. slice_out .-> SliceTable["slice"] FlowTable["flow"] -. slice_in .-> SliceTable["slice"] CpuFreqTable["cpu_freq"] -. cpu_id .-> CpuTable["cpu"] GpuCounterGroupTable["gpu_counter_group"] -. track_id .-> TrackTable["track"] ExperimentalProtoPathTable["experimental_proto_path"] -. parent_id .-> ExperimentalProtoPathTable["experimental_proto_path"] ExperimentalProtoContentTable["experimental_proto_content"] -. path_id .-> ExperimentalProtoPathTable["experimental_proto_path"] click ProcessTable "#process" click ProcessTable "#process" click PackageListTable "#package_list" click ArgTable "#args" click ThreadTable "#thread" click ProcessTable "#process" click AndroidGameInterventionListTable "#android_game_intervention_list" click FlowTable "#flow" click SliceTable "#slice" click SliceTable "#slice" click ArgTable "#args" click ClockSnapshotTable "#clock_snapshot" click CpuTable "#cpu" click CpuFreqTable "#cpu_freq" click CpuTable "#cpu" click ExpMissingChromeProcTable "#experimental_missing_chrome_processes" click FiledescriptorTable "#filedescriptor" click MetadataTable "#metadata" click GpuCounterGroupTable "#gpu_counter_group" click TrackTable "#track" click PackageListTable "#package_list" click VulkanMemoryAllocationsTable "#vulkan_memory_allocations" click ExperimentalProtoPathTable "#experimental_proto_path" click ExperimentalProtoPathTable "#experimental_proto_path" click ExperimentalProtoContentTable "#experimental_proto_content" click ExperimentalProtoPathTable "#experimental_proto_path"

Tracks

track

Tracks are a fundamental concept in trace processor and represent a "timeline" for events of the same type and with the same context. See https://perfetto.dev/docs/analysis/trace-processor#tracks for a more detailed explanation, with examples.

Column	Type	Description
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

counter_track

Extends track

Tracks containing counter-like events. See https://perfetto.dev/docs/analysis/trace-processor#events for a defintion and examples of counters.

Column	Type	Description
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

cpu_counter_track

Extends counter_track

Tracks containing counter-like events associated to a CPU.

Column	Type	Description
cpu	uint32_t	The CPU this track is associated with
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

cpu_track

Extends track

Tracks which are associated to a single CPU

Column	Type	Description
cpu	uint32_t	The CPU associated with this track
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

energy_counter_track

Extends counter_track

Energy consumers' values for energy descriptors in energy_estimation_breakdown packet

Column	Type	Description
consumer_id	int32_t	id of a distinct energy consumer
consumer_type	string	type of energy consumer
ordinal	int32_t	ordinal of energy consumer
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

uid_counter_track

Extends counter_track

The uid associated with this track

Column	Type	Description
uid	int32_t	uid of process for which breakdowns are emitted
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

energy_per_uid_counter_track

Extends uid_counter_track

Energy consumer values for per uid in uid_counter_track

Column	Type	Description
consumer_id	int32_t	id of the consumer process
	Columns inherited from uid_counter_track
uid	int32_t	uid of process for which breakdowns are emitted
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

gpu_counter_track

Extends counter_track

Tracks containing counter-like events associated to a GPU

Column	Type	Description
gpu_id	uint32_t	The identifier for the GPU.
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

gpu_track

Extends track

Tracks assocaited to a GPU.

Column	Type	Description
scope	string	The scope for the track. For debugging purposes only.
description	string	The description of the track. For debugging purposes only.
context_id	int64_t `optional`	The context id for the GPU this track is associated to.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

irq_counter_track

Extends counter_track

Tracks containing counter-like events associated to an hardirq

Column	Type	Description
irq	int32_t	The identifier for the hardirq.
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

perf_counter_track

Extends counter_track

Sampled counters' values for samples in the perf_sample table.

Column	Type	Description
perf_session_id	uint32_t	id of a distict profiling stream
cpu	uint32_t	the core the sample was taken on
is_timebase	uint32_t	If true, indicates this counter was the sampling timebase for this perf_session_id
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

process_counter_track

Extends counter_track

Tracks containing counter-like events associated to a process.

Column	Type	Description
upid	uint32_t	The process associated with this track Joinable with process.upid
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

process_track

Extends track

Tracks which are associated to the process given by the |upid| column

Column	Type	Description
upid	uint32_t	The process associated with this track Joinable with process.upid
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

softirq_counter_track

Extends counter_track

Tracks containing counter-like events associated to a softirq

Column	Type	Description
softirq	int32_t	The identifier for the softirq.
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

thread_counter_track

Extends counter_track

Tracks containing counter-like events associated to a thread.

Column	Type	Description
utid	uint32_t	The thread associated with this track Joinable with thread.utid
	Columns inherited from counter_track
unit	string	The units of the counter. This column is rarely filled.
description	string	The description for this track. For debugging purposes only.
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

thread_track

Extends track

Tracks which are associated to the thread given by the |utid| column

Column	Type	Description
utid	uint32_t	The thread associated with this track Joinable with thread.utid
	Columns inherited from track
id	TrackTable::Id	Unique idenitifier for this track.
type	string	The name of the "most-specific" child table containing this row.
name	string	Name of the track; can be null for some types of tracks (e.g thread tracks).
parent_id	TrackTable::Id `optional`	The track which is the "parent" of this track. Only non-null for tracks created using Perfetto's track_event API Joinable with track.id
source_arg_set_id	uint32_t `optional`	Args for this track which store information about "source" of this track in the trace. For example: whether this track orginated from atrace, Chrome tracepoints etc Joinable with args.arg_set_id

Events

android_logs

Log entries from Android logcat.

NOTE: this table is not sorted by timestamp. This is why we omit the sorted flag on the ts column.

Column	Type	Description
id	AndroidLogTable::Id	Unique idenitifier for this android_logs.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	Timestamp of log entry.
utid	ThreadTable::Id	Thread writing the log entry Joinable with thread.id
prio	uint32_t	Priority of the log. 3=DEBUG, 4=INFO, 5=WARN, 6=ERROR.
tag	string `optional`	Tag of the log entry.
msg	string	Content of the log entry.

android_dumpstate

Dumpsys entries from Android dumpstate.

Column	Type	Description
id	AndroidDumpstateTable::Id	Unique idenitifier for this android_dumpstate.
type	string	The name of the "most-specific" child table containing this row.
section	string `optional`	name of the dumpstate section.
service	string `optional`	name of the dumpsys service. Only present when dumpstate=="dumpsys", NULL otherwise.
line	string	line-by-line contents of the section/service, one row per line.

counter

Column	Type	Description
id	CounterTable::Id	Unique idenitifier for this counter.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t
track_id	CounterTrackTable::Id	Joinable with counter_track.id
value	double
arg_set_id	uint32_t `optional`

slice

Contains slices from userspace which explains what threads were doing during the trace.

Column	Type	Description
id	SliceTable::Id	Unique idenitifier for this slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
depth	uint32_t	The depth of the slice in the current stack of slices.
stack_id	int64_t	A unique identifier obtained from the names of all slices in this stack. This is rarely useful and kept around only for legacy reasons.
parent_stack_id	int64_t	The stack_id for the parent of this slice. Rarely useful.
parent_id	SliceTable::Id `optional`	The id of the parent (i.e. immediate ancestor) slice for this slice Joinable with slice.id
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
thread_ts	int64_t `optional`	The thread timestamp at the start of the slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_dur	int64_t `optional`	' The thread time used by this slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_instruction_count	int64_t `optional`	The value of the CPU instruction counter at the start of the slice. This column will only be populated if thread instruction collection is enabled with track_event.
thread_instruction_delta	int64_t `optional`	The change in value of the CPU instruction counter between the start and end of the slice. This column will only be populated if thread instruction collection is enabled with track_event.

raw

Contains 'raw' events from the trace for some types of events. This table only exists for debugging purposes and should not be relied on in production usecases (i.e. metrics, standard library etc).

Column	Type	Description
id	RawTable::Id	Unique idenitifier for this raw.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp of this event.
name	string	The name of the event. For ftrace events, this will be the ftrace event name.
cpu	uint32_t	The CPU this event was emitted on.
utid	ThreadTable::Id	The thread this event was emitted on Joinable with thread.id
arg_set_id	uint32_t	The set of key/value pairs associated with this event Joinable with args.arg_set_id
common_flags	uint32_t	Ftrace event flags for this event. Currently only emitted for sched_waking events.

ftrace_event

Extends raw

Contains all the ftrace events in the trace. This table exists only for debugging purposes and should not be relied on in production usecases (i.e. metrics, standard library etc). Note also that this table might be empty if raw ftrace parsing has been disabled.

Column	Type	Description
	Columns inherited from raw
id	RawTable::Id	Unique idenitifier for this raw.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp of this event.
name	string	The name of the event. For ftrace events, this will be the ftrace event name.
cpu	uint32_t	The CPU this event was emitted on.
utid	ThreadTable::Id	The thread this event was emitted on Joinable with thread.id
arg_set_id	uint32_t	The set of key/value pairs associated with this event Joinable with args.arg_set_id
common_flags	uint32_t	Ftrace event flags for this event. Currently only emitted for sched_waking events.

sched_slice

This table holds slices with kernel thread scheduling information. These slices are collected when the Linux "ftrace" data source is used with the "sched/switch" and "sched/wakeup*" events enabled.

The rows in this table will always have a matching row in the |thread_state| table with |thread_state.state| = 'Running'

Column	Type	Description
id	SchedSliceTable::Id	Unique idenitifier for this sched_slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
cpu	uint32_t	The CPU that the slice executed on.
utid	uint32_t	The thread's unique id in the trace..
end_state	string	A string representing the scheduling state of the kernel thread at the end of the slice. The individual characters in the string mean the following: R (runnable), S (awaiting a wakeup), D (in an uninterruptible sleep), T (suspended), t (being traced), X (exiting), P (parked), W (waking), I (idle), N (not contributing to the load average), K (wakeable on fatal signals) and Z (zombie, awaiting cleanup).
priority	int32_t	The kernel priority that the thread ran at.

spurious_sched_wakeup

This table contains the scheduling wakeups that occurred while a thread was not blocked, i.e. running or runnable. Such wakeups are not tracked in the |thread_state_table|.

Column	Type	Description
id	SpuriousSchedWakeupTable::Id	Unique idenitifier for this spurious_sched_wakeup.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
thread_state_id	int64_t	The id of the row in the thread_state table that this row is associated with.
irq_context	uint32_t `optional`	Whether the wakeup was from interrupt context or process context.
utid	uint32_t	The thread's unique id in the trace..
waker_utid	uint32_t	The unique thread id of the thread which caused a wakeup of this thread.

thread_state

This table contains the scheduling state of every thread on the system during the trace.

The rows in this table which have |state| = 'Running', will have a corresponding row in the |sched_slice| table.

Column	Type	Description
id	ThreadStateTable::Id	Unique idenitifier for this thread_state.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
cpu	uint32_t `optional`	The CPU that the slice executed on.
utid	uint32_t	The thread's unique id in the trace..
state	string	The scheduling state of the thread. Can be "Running" or any of the states described in \|sched_slice.end_state\|.
io_wait	uint32_t `optional`	Indicates whether this thread was blocked on IO.
blocked_function	string `optional`	The function in the kernel this thread was blocked on.
waker_utid	uint32_t `optional`	The unique thread id of the thread which caused a wakeup of this thread.
irq_context	uint32_t `optional`	Whether the wakeup was from interrupt context or process context.

actual_frame_timeline_slice

Extends slice

Column	Type	Description
display_frame_token	int64_t
surface_frame_token	int64_t
upid	uint32_t
layer_name	string
present_type	string
on_time_finish	int32_t
gpu_composition	int32_t
jank_type	string
prediction_type	string
jank_tag	string
	Columns inherited from slice
id	SliceTable::Id	Unique idenitifier for this slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
depth	uint32_t	The depth of the slice in the current stack of slices.
stack_id	int64_t	A unique identifier obtained from the names of all slices in this stack. This is rarely useful and kept around only for legacy reasons.
parent_stack_id	int64_t	The stack_id for the parent of this slice. Rarely useful.
parent_id	SliceTable::Id `optional`	The id of the parent (i.e. immediate ancestor) slice for this slice Joinable with slice.id
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
thread_ts	int64_t `optional`	The thread timestamp at the start of the slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_dur	int64_t `optional`	' The thread time used by this slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_instruction_count	int64_t `optional`	The value of the CPU instruction counter at the start of the slice. This column will only be populated if thread instruction collection is enabled with track_event.
thread_instruction_delta	int64_t `optional`	The change in value of the CPU instruction counter between the start and end of the slice. This column will only be populated if thread instruction collection is enabled with track_event.

expected_frame_timeline_slice

Extends slice

Column	Type	Description
display_frame_token	int64_t
surface_frame_token	int64_t
upid	uint32_t
layer_name	string
	Columns inherited from slice
id	SliceTable::Id	Unique idenitifier for this slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
depth	uint32_t	The depth of the slice in the current stack of slices.
stack_id	int64_t	A unique identifier obtained from the names of all slices in this stack. This is rarely useful and kept around only for legacy reasons.
parent_stack_id	int64_t	The stack_id for the parent of this slice. Rarely useful.
parent_id	SliceTable::Id `optional`	The id of the parent (i.e. immediate ancestor) slice for this slice Joinable with slice.id
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
thread_ts	int64_t `optional`	The thread timestamp at the start of the slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_dur	int64_t `optional`	' The thread time used by this slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_instruction_count	int64_t `optional`	The value of the CPU instruction counter at the start of the slice. This column will only be populated if thread instruction collection is enabled with track_event.
thread_instruction_delta	int64_t `optional`	The change in value of the CPU instruction counter between the start and end of the slice. This column will only be populated if thread instruction collection is enabled with track_event.

experimental_flat_slice

An experimental table which "flattens" stacks of slices to contain only the "deepest" slice at any point in time on each track.

Column	Type	Description
id	ExperimentalFlatSliceTable::Id	Unique idenitifier for this experimental_flat_slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
source_id	SliceTable::Id `optional`	The id of the slice which this row originated from Joinable with slice.id

gpu_slice

Extends slice

Column	Type	Description
context_id	int64_t `optional`
render_target	int64_t `optional`
render_target_name	string
render_pass	int64_t `optional`
render_pass_name	string
command_buffer	int64_t `optional`
command_buffer_name	string
frame_id	uint32_t `optional`
submission_id	uint32_t `optional`
hw_queue_id	int64_t `optional`
render_subpasses	string
	Columns inherited from slice
id	SliceTable::Id	Unique idenitifier for this slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
depth	uint32_t	The depth of the slice in the current stack of slices.
stack_id	int64_t	A unique identifier obtained from the names of all slices in this stack. This is rarely useful and kept around only for legacy reasons.
parent_stack_id	int64_t	The stack_id for the parent of this slice. Rarely useful.
parent_id	SliceTable::Id `optional`	The id of the parent (i.e. immediate ancestor) slice for this slice Joinable with slice.id
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
thread_ts	int64_t `optional`	The thread timestamp at the start of the slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_dur	int64_t `optional`	' The thread time used by this slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_instruction_count	int64_t `optional`	The value of the CPU instruction counter at the start of the slice. This column will only be populated if thread instruction collection is enabled with track_event.
thread_instruction_delta	int64_t `optional`	The change in value of the CPU instruction counter between the start and end of the slice. This column will only be populated if thread instruction collection is enabled with track_event.

frame_slice

Extends slice

Column	Type	Description
frame_number	uint32_t
layer_name	string
queue_to_acquire_time	int64_t
acquire_to_latch_time	int64_t
latch_to_present_time	int64_t
	Columns inherited from slice
id	SliceTable::Id	Unique idenitifier for this slice.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	The timestamp at the start of the slice (in nanoseconds).
dur	int64_t	The duration of the slice (in nanoseconds).
track_id	TrackTable::Id	The id of the track this slice is located on Joinable with track.id
category	string `optional`	The "category" of the slice. If this slice originated with track_event, this column contains the category emitted Otherwise, it is likely to be null (with limited exceptions).
name	string `optional`	The name of the slice. The name describes what was happening during the slice.
depth	uint32_t	The depth of the slice in the current stack of slices.
stack_id	int64_t	A unique identifier obtained from the names of all slices in this stack. This is rarely useful and kept around only for legacy reasons.
parent_stack_id	int64_t	The stack_id for the parent of this slice. Rarely useful.
parent_id	SliceTable::Id `optional`	The id of the parent (i.e. immediate ancestor) slice for this slice Joinable with slice.id
arg_set_id	uint32_t	The id of the argument set associated with this slice Joinable with args.arg_set_id
thread_ts	int64_t `optional`	The thread timestamp at the start of the slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_dur	int64_t `optional`	' The thread time used by this slice. This column will only be populated if thread timestamp collection is enabled with track_event.
thread_instruction_count	int64_t `optional`	The value of the CPU instruction counter at the start of the slice. This column will only be populated if thread instruction collection is enabled with track_event.
thread_instruction_delta	int64_t `optional`	The change in value of the CPU instruction counter between the start and end of the slice. This column will only be populated if thread instruction collection is enabled with track_event.

ART Heap Graphs

heap_graph_class

Column	Type	Description
id	HeapGraphClassTable::Id	Unique idenitifier for this heap_graph_class.
type	string	The name of the "most-specific" child table containing this row.
name	string	(potentially obfuscated) name of the class.
deobfuscated_name	string `optional`	if class name was obfuscated and deobfuscation map for it provided, the deobfuscated name.
location	string `optional`	the APK / Dex / JAR file the class is contained in classloader_id should really be HeapGraphObject::id, but that would create a loop, which is currently not possible TODO(lalitm): resolve this
superclass_id	HeapGraphClassTable::Id `optional`	Joinable with heap_graph_class.id
classloader_id	uint32_t `optional`
kind	string

heap_graph_object

The objects on the Dalvik heap.

All rows with the same (upid, graph_sample_ts) are one dump.

Column	Type	Description
id	HeapGraphObjectTable::Id	Unique idenitifier for this heap_graph_object.
type	string	The name of the "most-specific" child table containing this row.
upid	uint32_t	UniquePid of the target.
graph_sample_ts	int64_t	timestamp this dump was taken at.
self_size	int64_t	size this object uses on the Java Heap.
native_size	int64_t	approximate amount of native memory used by this object, as reported by libcore.util.NativeAllocationRegistry.size.
reference_set_id	uint32_t `optional`	join key with heap_graph_reference containing all objects referred in this object's fields.
reachable	int32_t	bool whether this object is reachable from a GC root. If false, this object is uncollected garbage.
type_id	HeapGraphClassTable::Id	class this object is an instance of Joinable with heap_graph_class.id
root_type	string `optional`	if not NULL, this object is a GC root.

heap_graph_reference

Many-to-many mapping between heap_graph_object.

This associates the object with given reference_set_id with the objects that are referred to by its fields.

Column	Type	Description
id	HeapGraphReferenceTable::Id	Unique idenitifier for this heap_graph_reference.
type	string	The name of the "most-specific" child table containing this row.
reference_set_id	uint32_t	join key to heap_graph_object.
owner_id	HeapGraphObjectTable::Id	id of object that has this reference_set_id Joinable with heap_graph_object.id
owned_id	HeapGraphObjectTable::Id `optional`	id of object that is referred to Joinable with heap_graph_object.id
field_name	string	the field that refers to the object. E.g. Foo.name.
field_type_name	string	the static type of the field. E.g. java.lang.String.
deobfuscated_field_name	string `optional`	if field_name was obfuscated and a deobfuscation mapping was provided for it, the deobfuscated name.

Callstack profilers

stack_profile_mapping

A mapping (binary / library) in a process. This is generated by the stack profilers: heapprofd and traced_perf.

Column	Type	Description
id	StackProfileMappingTable::Id	Unique idenitifier for this stack_profile_mapping.
type	string	The name of the "most-specific" child table containing this row.
build_id	string	hex-encoded Build ID of the binary / library.
exact_offset	int64_t
start_offset	int64_t
start	int64_t	start of the mapping in the process' address space.
end	int64_t	end of the mapping in the process' address space.
load_bias	int64_t
name	string	filename of the binary / library.

stack_profile_frame

A frame on the callstack. This is a location in a program. This is generated by the stack profilers: heapprofd and traced_perf.

Column	Type	Description
id	StackProfileFrameTable::Id	Unique idenitifier for this stack_profile_frame.
type	string	The name of the "most-specific" child table containing this row.
name	string	name of the function this location is in.
mapping	StackProfileMappingTable::Id	the mapping (library / binary) this location is in Joinable with stack_profile_mapping.id
rel_pc	int64_t	the program counter relative to the start of the mapping.
symbol_set_id	uint32_t `optional`	if the profile was offline symbolized, the offline symbol information of this frame.
deobfuscated_name	string `optional`

stack_profile_callsite

A callsite. This is a list of frames that were on the stack. This is generated by the stack profilers: heapprofd and traced_perf.

Column	Type	Description
id	StackProfileCallsiteTable::Id	Unique idenitifier for this stack_profile_callsite.
type	string	The name of the "most-specific" child table containing this row.
depth	uint32_t	distance from the bottom-most frame of the callstack.
parent_id	StackProfileCallsiteTable::Id `optional`	parent frame on the callstack. NULL for the bottom-most Joinable with stack_profile_callsite.id
frame_id	StackProfileFrameTable::Id	frame at this position in the callstack Joinable with stack_profile_frame.id

stack_sample

Root table for timestamped stack samples.

Column	Type	Description
id	StackSampleTable::Id	Unique idenitifier for this stack_sample.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	timestamp of the sample.
callsite_id	StackProfileCallsiteTable::Id	unwound callstack Joinable with stack_profile_callsite.id

cpu_profile_stack_sample

Extends stack_sample

Samples from the Chromium stack sampler.

Column	Type	Description
utid	uint32_t	thread that was active when the sample was taken.
process_priority	int32_t
	Columns inherited from stack_sample
id	StackSampleTable::Id	Unique idenitifier for this stack_sample.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	timestamp of the sample.
callsite_id	StackProfileCallsiteTable::Id	unwound callstack Joinable with stack_profile_callsite.id

experimental_flamegraph_nodes

Table used to render flamegraphs. This gives cumulative sizes of nodes in the flamegraph.

WARNING: This is experimental and the API is subject to change.

Column	Type	Description
id	ExperimentalFlamegraphNodesTable::Id	Unique idenitifier for this experimental_flamegraph_nodes.
type	string	The name of the "most-specific" child table containing this row.
depth	uint32_t
name	string
map_name	string
count	int64_t
cumulative_count	int64_t
size	int64_t
cumulative_size	int64_t
alloc_count	int64_t
cumulative_alloc_count	int64_t
alloc_size	int64_t
cumulative_alloc_size	int64_t
parent_id	ExperimentalFlamegraphNodesTable::Id `optional`	Joinable with experimental_flamegraph_nodes.id
source_file	string `optional`
line_number	uint32_t `optional`
upid_group	string `optional`

heap_profile_allocation

Allocations that happened at a callsite.

NOTE: this table is not sorted by timestamp intentionanlly - see b/193757386 for details. TODO(b/193757386): readd the sorted flag once this bug is fixed.

This is generated by heapprofd.

Column	Type	Description
id	HeapProfileAllocationTable::Id	Unique idenitifier for this heap_profile_allocation.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	the timestamp the allocations happened at. heapprofd batches allocations and frees, and all data from a dump will have the same timestamp.
upid	uint32_t	the UniquePID of the allocating process.
heap_name	string
callsite_id	StackProfileCallsiteTable::Id	the callsite the allocation happened at Joinable with stack_profile_callsite.id
count	int64_t	if positive: number of allocations that happened at this callsite. if negative: number of allocations that happened at this callsite that were freed.
size	int64_t	if positive: size of allocations that happened at this callsite. if negative: size of allocations that happened at this callsite that were freed.

perf_sample

Samples from the traced_perf profiler.

Column	Type	Description
id	PerfSampleTable::Id	Unique idenitifier for this perf_sample.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	timestamp of the sample.
utid	uint32_t	sampled thread..
cpu	uint32_t	the core the sampled thread was running on.
cpu_mode	string	execution state (userspace/kernelspace) of the sampled thread.
callsite_id	StackProfileCallsiteTable::Id `optional`	if set, unwound callstack of the sampled thread Joinable with stack_profile_callsite.id
unwind_error	string `optional`	if set, indicates that the unwinding for this sample encountered an error. Such samples still reference the best-effort result via the callsite_id (with a synthetic error frame at the point where unwinding stopped).
perf_session_id	uint32_t	distinguishes samples from different profiling streams (i.e. multiple data sources).

profiler_smaps

The profiler smaps contains the memory stats for virtual memory ranges captured by the heap profiler.

Column	Type	Description
id	ProfilerSmapsTable::Id	Unique idenitifier for this profiler_smaps.
type	string	The name of the "most-specific" child table containing this row.
upid	uint32_t	The UniquePID of the process.
ts	int64_t	Timestamp of the snapshot. Multiple rows will have the same timestamp.
path	string	The mmaped file, as per /proc/pid/smaps.
size_kb	int64_t	Total size of the mapping.
private_dirty_kb	int64_t	KB of this mapping that are private dirty RSS.
swap_kb	int64_t	KB of this mapping that are in swap.
file_name	string
start_address	int64_t
module_timestamp	int64_t
module_debugid	string
module_debug_path	string
protection_flags	int64_t
private_clean_resident_kb	int64_t
shared_dirty_resident_kb	int64_t
shared_clean_resident_kb	int64_t
locked_kb	int64_t
proportional_resident_kb	int64_t

stack_profile_symbol

Symbolization data for a frame. Rows with the same symbol_set_id describe one callframe, with the most-inlined symbol having id == symbol_set_id.

For instance, if the function foo has an inlined call to the function bar, which has an inlined call to baz, the stack_profile_symbol table would look like this.

|id|symbol_set_id|name         |source_file|line_number|
|--|-------------|-------------|-----------|-----------|
|1 |      1      |baz          |foo.cc     | 36        |
|2 |      1      |bar          |foo.cc     | 30        |
|3 |      1      |foo          |foo.cc     | 60        |

Column	Type	Description
id	SymbolTable::Id	Unique idenitifier for this stack_profile_symbol.
type	string	The name of the "most-specific" child table containing this row.
symbol_set_id	uint32_t
name	string	name of the function.
source_file	string	name of the source file containing the function.
line_number	uint32_t	line number of the frame in the source file. This is the exact line for the corresponding program counter, not the beginning of the function.

Memory Snapshots

memory_snapshot

Column	Type	Description
id	MemorySnapshotTable::Id	Unique idenitifier for this memory_snapshot.
type	string	The name of the "most-specific" child table containing this row.
timestamp	int64_t
track_id	TrackTable::Id	Joinable with track.id
detail_level	string

process_memory_snapshot

Column	Type	Description
id	ProcessMemorySnapshotTable::Id	Unique idenitifier for this process_memory_snapshot.
type	string	The name of the "most-specific" child table containing this row.
snapshot_id	MemorySnapshotTable::Id	Joinable with memory_snapshot.id
upid	uint32_t

memory_snapshot_node

Column	Type	Description
id	MemorySnapshotNodeTable::Id	Unique idenitifier for this memory_snapshot_node.
type	string	The name of the "most-specific" child table containing this row.
process_snapshot_id	ProcessMemorySnapshotTable::Id	Joinable with process_memory_snapshot.id
parent_node_id	MemorySnapshotNodeTable::Id `optional`	Joinable with memory_snapshot_node.id
path	string
size	int64_t
effective_size	int64_t
arg_set_id	uint32_t `optional`

memory_snapshot_edge

Column	Type	Description
id	MemorySnapshotEdgeTable::Id	Unique idenitifier for this memory_snapshot_edge.
type	string	The name of the "most-specific" child table containing this row.
source_node_id	MemorySnapshotNodeTable::Id	Joinable with memory_snapshot_node.id
target_node_id	MemorySnapshotNodeTable::Id	Joinable with memory_snapshot_node.id
importance	uint32_t

Misc

process

Contains information of processes seen during the trace

Column	Type	Description
upid	ProcessTable::Id	Unique process id. This is != the OS pid. This is a monotonic number associated to each process. The OS process id (pid) cannot be used as primary key because tids and pids are recycled by most kernels.
pid	uint32_t	The OS id for this process. Note: this is not unique over the lifetime of the trace so cannot be used as a primary key. Use \|upid\| instead.
name	string `optional`	The name of the process. Can be populated from many sources (e.g. ftrace, /proc scraping, track event etc).
start_ts	int64_t `optional`	The start timestamp of this process (if known). Is null in most cases unless a process creation event is enabled (e.g. task_newtask ftrace event on Linux/Android).
end_ts	int64_t `optional`	The end timestamp of this process (if known). Is null in most cases unless a process destruction event is enabled (e.g. sched_process_free ftrace event on Linux/Android).
parent_upid	ProcessTable::Id `optional`	The upid of the process which caused this process to be spawned Joinable with process.upid
uid	uint32_t `optional`	The Unix user id of the process Joinable with package_list.uid
android_appid	uint32_t `optional`	Android appid of this process.
cmdline	string `optional`	/proc/cmdline for this process.
arg_set_id	uint32_t	Extra args for this process Joinable with args.arg_set_id

thread

Contains information of threads seen during the trace

Column	Type	Description
utid	ThreadTable::Id	Unique thread id. This is != the OS tid. This is a monotonic number associated to each thread. The OS thread id (tid) cannot be used as primary key because tids and pids are recycled by most kernels.
tid	uint32_t	The OS id for this thread. Note: this is not unique over the lifetime of the trace so cannot be used as a primary key. Use \|utid\| instead.
name	string `optional`	The name of the thread. Can be populated from many sources (e.g. ftrace, /proc scraping, track event etc).
start_ts	int64_t `optional`	The start timestamp of this thread (if known). Is null in most cases unless a thread creation event is enabled (e.g task_newtask ftrace event on Linux/Android).
end_ts	int64_t `optional`	The end timestamp of this thread (if known). Is null in most cases unless a thread destruction event is enabled (e.g sched_process_free ftrace event on Linux/Android).
upid	ProcessTable::Id `optional`	The process hosting this thread Joinable with process.upid
is_main_thread	uint32_t `optional`	Boolean indicating if this thread is the main thread in the process.

android_game_intervention_list

A table presenting all game modes and interventions of games installed on the system. This is generated by the game_mode_intervention data-source.

Column	Type	Description
id	AndroidGameInterventionListTable::Id	Unique idenitifier for this android_game_intervention_list.
type	string	The name of the "most-specific" child table containing this row.
package_name	string	name of the pakcage, e.g. com.google.android.gm.
uid	int64_t	UID processes of this package runs as.
current_mode	int32_t	current game mode the game is running at.
standard_mode_supported	int32_t	bool whether standard mode is supported.
standard_mode_downscale	double `optional`	resolution downscaling factor of standard mode.
standard_mode_use_angle	int32_t `optional`	bool whether ANGLE is used in standard mode.
standard_mode_fps	double `optional`	frame rate that the game is throttled at in standard mode.
perf_mode_supported	int32_t	bool whether performance mode is supported.
perf_mode_downscale	double `optional`	resolution downscaling factor of performance mode.
perf_mode_use_angle	int32_t `optional`	bool whether ANGLE is used in performance mode.
perf_mode_fps	double `optional`	frame rate that the game is throttled at in performance mode.
battery_mode_supported	int32_t	bool whether battery mode is supported.
battery_mode_downscale	double `optional`	resolution downscaling factor of battery mode.
battery_mode_use_angle	int32_t `optional`	bool whether ANGLE is used in battery mode.
battery_mode_fps	double `optional`	frame rate that the game is throttled at in battery mode.

flow

Column	Type	Description
id	FlowTable::Id	Unique idenitifier for this flow.
type	string	The name of the "most-specific" child table containing this row.
slice_out	SliceTable::Id	Joinable with slice.id
slice_in	SliceTable::Id	Joinable with slice.id
arg_set_id	uint32_t

args

Column	Type	Description
id	ArgTable::Id	Unique idenitifier for this args.
type	string	The name of the "most-specific" child table containing this row.
arg_set_id	uint32_t
flat_key	string
key	string
int_value	int64_t `optional`
string_value	string `optional`
real_value	double `optional`
value_type	string

clock_snapshot

Contains all the mapping between clock snapshots and trace time.

NOTE: this table is not sorted by timestamp; this is why we omit the sorted flag on the ts column.

Column	Type	Description
id	ClockSnapshotTable::Id	Unique idenitifier for this clock_snapshot.
type	string	The name of the "most-specific" child table containing this row.
ts	int64_t	timestamp of the snapshot in trace time.
clock_id	int64_t	id of the clock (corresponds to the id in the trace).
clock_name	string `optional`	the name of the clock for builtin clocks or null otherwise.
clock_value	int64_t	timestamp of the snapshot in clock time.
snapshot_id	uint32_t	the index of this snapshot (only useful for debugging)

cpu

Contains information of processes seen during the trace

Column	Type	Description
id	CpuTable::Id	Unique idenitifier for this cpu.
type	string	The name of the "most-specific" child table containing this row.
cluster_id	uint32_t	the cluster id is shared by CPUs in the same cluster
processor	string	a string describing this core

cpu_freq

Column	Type	Description
id	CpuFreqTable::Id	Unique idenitifier for this cpu_freq.
type	string	The name of the "most-specific" child table containing this row.
cpu_id	CpuTable::Id	Joinable with cpu.id
freq	uint32_t

experimental_missing_chrome_processes

Experimental table, subject to arbitrary breaking changes.

Column	Type	Description
id	ExpMissingChromeProcTable::Id	Unique idenitifier for this experimental_missing_chrome_processes.
type	string	The name of the "most-specific" child table containing this row.
upid	uint32_t
reliable_from	int64_t `optional`

filedescriptor

Contains information of filedescriptors collected during the trace

Column	Type	Description
id	FiledescriptorTable::Id	Unique idenitifier for this filedescriptor.
type	string	The name of the "most-specific" child table containing this row.
ufd	int64_t	Unique fd. This is != the OS fd This is a monotonic number associated to each filedescriptor. The OS assigned fd cannot be used as primary key because fds are recycled by most kernels.
fd	int64_t	The OS id for this process. Note: this is not unique over the lifetime of the trace so cannot be used as a primary key. Use \|ufd\| instead.
ts	int64_t `optional`	The timestamp for when the fd was collected.
upid	uint32_t `optional`	The upid of the process which opened the filedescriptor.
path	string `optional`	The path to the file or device backing the fd In case this was a socket the path will be the port number.

metadata

Column	Type	Description
id	MetadataTable::Id	Unique idenitifier for this metadata.
type	string	The name of the "most-specific" child table containing this row.
name	string
key_type	string
int_value	int64_t `optional`
str_value	string `optional`

gpu_counter_group

Column	Type	Description
id	GpuCounterGroupTable::Id	Unique idenitifier for this gpu_counter_group.
type	string	The name of the "most-specific" child table containing this row.
group_id	int32_t
track_id	TrackTable::Id	Joinable with track.id

package_list

Metadata about packages installed on the system. This is generated by the packages_list data-source.

Column	Type	Description
id	PackageListTable::Id	Unique idenitifier for this package_list.
type	string	The name of the "most-specific" child table containing this row.
package_name	string	name of the package, e.g. com.google.android.gm.
uid	int64_t	UID processes of this package run as.
debuggable	int32_t	bool whether this app is debuggable.
profileable_from_shell	int32_t	bool whether this app is profileable.
version_code	int64_t	versionCode from the APK.

vulkan_memory_allocations

Column	Type	Description
id	VulkanMemoryAllocationsTable::Id	Unique idenitifier for this vulkan_memory_allocations.
type	string	The name of the "most-specific" child table containing this row.
arg_set_id	uint32_t `optional`
source	string
operation	string
timestamp	int64_t
upid	uint32_t `optional`
device	int64_t `optional`
device_memory	int64_t `optional`
memory_type	uint32_t `optional`
heap	uint32_t `optional`
function_name	string `optional`
object_handle	int64_t `optional`
memory_address	int64_t `optional`
memory_size	int64_t `optional`
scope	string

experimental_proto_path

Experimental table, subject to arbitrary breaking changes.

Column	Type	Description
id	ExperimentalProtoPathTable::Id	Unique idenitifier for this experimental_proto_path.
type	string	The name of the "most-specific" child table containing this row.
parent_id	ExperimentalProtoPathTable::Id `optional`	Joinable with experimental_proto_path.id
field_type	string
field_name	string `optional`
arg_set_id	uint32_t `optional`

experimental_proto_content

Column	Type	Description
id	ExperimentalProtoContentTable::Id	Unique idenitifier for this experimental_proto_content.
type	string	The name of the "most-specific" child table containing this row.
path	string
path_id	ExperimentalProtoPathTable::Id	Joinable with experimental_proto_path.id
total_size	int64_t
size	int64_t
count	int64_t