Trace Processor Stats

Name	Cardinality	Type	Scope	Description
android_br_parse_errors	kSingle	kError	kTrace
android_log_num_failed	kSingle	kError	kTrace
android_log_format_invalid	kSingle	kError	kTrace
android_log_num_skipped	kSingle	kInfo	kTrace
android_log_num_total	kSingle	kInfo	kTrace
deobfuscate_location_parse_error	kSingle	kError	kTrace
energy_breakdown_missing_values	kSingle	kError	kAnalysis
energy_descriptor_invalid	kSingle	kError	kAnalysis
entity_state_descriptor_invalid	kSingle	kError	kAnalysis
entity_state_residency_invalid	kSingle	kError	kAnalysis
entity_state_residency_lookup_failed	kSingle	kError	kAnalysis
energy_uid_breakdown_missing_values	kSingle	kError	kAnalysis
frame_timeline_event_parser_errors	kSingle	kInfo	kAnalysis
frame_timeline_unpaired_end_event	kSingle	kInfo	kAnalysis
ftrace_bundle_tokenizer_errors	kSingle	kError	kAnalysis
ftrace_cpu_bytes_begin	kIndexed	kInfo	kTrace
ftrace_cpu_bytes_end	kIndexed	kInfo	kTrace
ftrace_cpu_bytes_delta	kIndexed	kInfo	kTrace
ftrace_cpu_commit_overrun_begin	kIndexed	kInfo	kTrace
ftrace_cpu_commit_overrun_end	kIndexed	kInfo	kTrace
ftrace_cpu_commit_overrun_delta	kIndexed	kError	kTrace
ftrace_cpu_dropped_events_begin	kIndexed	kInfo	kTrace
ftrace_cpu_dropped_events_end	kIndexed	kInfo	kTrace
ftrace_cpu_dropped_events_delta	kIndexed	kError	kTrace
ftrace_cpu_entries_begin	kIndexed	kInfo	kTrace
ftrace_cpu_entries_end	kIndexed	kInfo	kTrace
ftrace_cpu_entries_delta	kIndexed	kInfo	kTrace
ftrace_cpu_now_ts_begin	kIndexed	kInfo	kTrace
ftrace_cpu_now_ts_end	kIndexed	kInfo	kTrace
ftrace_cpu_oldest_event_ts_begin	kIndexed	kInfo	kTrace
ftrace_cpu_oldest_event_ts_end	kIndexed	kInfo	kTrace
ftrace_cpu_overrun_begin	kIndexed	kInfo	kTrace
ftrace_cpu_overrun_end	kIndexed	kInfo	kTrace
ftrace_cpu_overrun_delta	kIndexed	kInfo	kTrace
ftrace_cpu_read_events_begin	kIndexed	kInfo	kTrace
ftrace_cpu_read_events_end	kIndexed	kInfo	kTrace
ftrace_cpu_read_events_delta	kIndexed	kInfo	kTrace
ftrace_cpu_has_data_loss	kIndexed	kDataLoss	kTrace	Ftrace data for the given cpu has data losses and is therefore unreliable. The kernel buffer overwrote events between our reads in userspace. Try re-recording the trace with a bigger buffer
ftrace_kprobe_hits_begin	kSingle	kInfo	kTrace	The number of kretprobe hits at the beginning of the trace.
ftrace_kprobe_hits_end	kSingle	kInfo	kTrace	The number of kretprobe hits at the end of the trace.
ftrace_kprobe_hits_delta	kSingle	kInfo	kTrace	The number of kprobe hits encountered during the collection of the trace.
ftrace_kprobe_misses_begin	kSingle	kInfo	kTrace	The number of kretprobe missed events at the beginning of the trace.
ftrace_kprobe_misses_end	kSingle	kInfo	kTrace	The number of kretprobe missed events at the end of the trace.
ftrace_kprobe_misses_delta	kSingle	kDataLoss	kTrace	The number of kretprobe missed events encountered during the collection of the trace. A value greater than zero is due to the maxactive parameter for the kretprobe being too small
ftrace_setup_errors	kSingle	kInfo	kTrace	One or more atrace/ftrace categories were not found or failed to enable. See ftrace_setup_errors in the metadata table for details.
ftrace_abi_errors_skipped_zero_data_length	\ kSingle	kInfo	kAnalysis
ftrace_thermal_exynos_acpm_unknown_tz_id	\ kSingle	kError	kAnalysis
fuchsia_non_numeric_counters	kSingle	kError	kAnalysis
fuchsia_timestamp_overflow	kSingle	kError	kAnalysis
fuchsia_record_read_error	kSingle	kError	kAnalysis
fuchsia_invalid_event	kSingle	kError	kAnalysis
fuchsia_invalid_event_arg_type	kSingle	kError	kAnalysis
fuchsia_invalid_event_arg_name	kSingle	kError	kAnalysis
fuchsia_unknown_event_arg	kSingle	kError	kAnalysis
fuchsia_invalid_string_ref	kSingle	kError	kAnalysis
generic_task_state_invalid_order	kSingle	kError	kAnalysis	Invalid order of generic task state events. Should never happen.
gpu_counters_invalid_spec	kSingle	kError	kAnalysis
gpu_counters_missing_spec	kSingle	kError	kAnalysis
gpu_render_stage_parser_errors	kSingle	kError	kAnalysis
graphics_frame_event_parser_errors	kSingle	kInfo	kAnalysis
guess_trace_type_duration_ns	kSingle	kInfo	kAnalysis
interned_data_tokenizer_errors	kSingle	kInfo	kAnalysis
invalid_clock_snapshots	kSingle	kError	kAnalysis
invalid_cpu_times	kSingle	kError	kAnalysis
kernel_wakelock_reused_id	kSingle	kError	kAnalysis	Duplicated interning ID seen. Should never happen.
kernel_wakelock_unknown_id	kSingle	kError	kAnalysis	Interning ID not found. Should never happen.
kernel_wakelock_zero_value_reported	kSingle	kDataLoss	kTrace	Zero value received from SuspendControlService. Indicates a transient error in SuspendControlService.
kernel_wakelock_non_monotonic_value_reported	\ kSingle	kDataLoss	kTrace	Decreased value received from SuspendControlService. Indicates a transient error in SuspendControlService.
kernel_wakelock_implausibly_large_value_reported	\ kSingle	kDataLoss	kTrace	Implausibly large increment to value received from SuspendControlService. Indicates a transient error in SuspendControlService.
app_wakelock_parse_error	kSingle	kError	kAnalysis	Parsing packed repeated field. Should never happen.
app_wakelock_unknown_id	kSingle	kError	kAnalysis	Interning ID not found. Should never happen.
meminfo_unknown_keys	kSingle	kError	kAnalysis
mismatched_sched_switch_tids	kSingle	kError	kAnalysis
mm_unknown_type	kSingle	kError	kAnalysis
parse_trace_duration_ns	kSingle	kInfo	kAnalysis
power_rail_unknown_index	kSingle	kError	kTrace
proc_stat_unknown_counters	kSingle	kError	kAnalysis
rss_stat_unknown_keys	kSingle	kError	kAnalysis
rss_stat_negative_size	kSingle	kInfo	kAnalysis
rss_stat_unknown_thread_for_mm_id	kSingle	kInfo	kAnalysis
filter_input_bytes	kSingle	kInfo	kTrace	Number of bytes pre-TraceFilter. The trace file would have been this many bytes big if the TraceConfig didn't specify any TraceFilter.
filter_input_packets	kSingle	kInfo	kTrace	Number of packets pre-TraceFilter. The trace file would have had so many packets if the TraceConfig didn't specify any TraceFilter.
filter_output_bytes	kSingle	kInfo	kTrace
filter_time_taken_ns	kSingle	kInfo	kTrace	Time cumulatively spent running the TraceFilter throughout the tracing session by MaybeFilterPackets().
filter_errors	kSingle	kError	kTrace
flow_duplicate_id	kSingle	kError	kTrace
flow_no_enclosing_slice	kSingle	kError	kTrace
flow_step_without_start	kSingle	kInfo	kTrace
flow_end_without_start	kSingle	kInfo	kTrace
flow_invalid_id	kSingle	kError	kTrace
flow_without_direction	kSingle	kError	kTrace
stackprofile_empty_callstack	kSingle	kError	kTrace	Callstack had no frames. Ignored
stackprofile_invalid_string_id	kSingle	kError	kTrace
stackprofile_invalid_mapping_id	kSingle	kError	kTrace
stackprofile_invalid_frame_id	kSingle	kError	kTrace
stackprofile_invalid_callstack_id	kSingle	kError	kTrace
stackprofile_parser_error	kSingle	kError	kTrace
systrace_parse_failure	kSingle	kError	kAnalysis
task_state_invalid	kSingle	kError	kAnalysis
traced_buf_abi_violations	kIndexed	kDataLoss	kTrace
traced_buf_buffer_size	kIndexed	kInfo	kTrace
traced_buf_bytes_overwritten	kIndexed	kInfo	kTrace
traced_buf_bytes_read	kIndexed	kInfo	kTrace
traced_buf_bytes_filtered_out	kIndexed	kInfo	kTrace	Number of bytes discarded (input - output) by the TraceFilter for
traced_buf_bytes_written	kIndexed	kInfo	kTrace
traced_buf_clone_done_timestamp_ns	kIndexed	kInfo	kTrace	The timestamp when the clone snapshot operation for this buffer finished
traced_buf_chunks_discarded	kIndexed	kInfo	kTrace
traced_buf_chunks_overwritten	kIndexed	kInfo	kTrace
traced_buf_chunks_read	kIndexed	kInfo	kTrace
traced_buf_chunks_rewritten	kIndexed	kInfo	kTrace
traced_buf_chunks_written	kIndexed	kInfo	kTrace
traced_buf_chunks_committed_out_of_order	\ kIndexed	kInfo	kTrace
traced_buf_padding_bytes_cleared	kIndexed	kInfo	kTrace
traced_buf_padding_bytes_written	kIndexed	kInfo	kTrace
traced_buf_patches_failed	kIndexed	kDataLoss	kTrace	The tracing service potentially lost data from one of the data sources writing into the given target_buffer. This entry can be ignored if you're using DISCARD buffers and traced_buf_chunks_discarded is
traced_buf_patches_succeeded	kIndexed	kInfo	kTrace
traced_buf_readaheads_failed	kIndexed	kInfo	kTrace
traced_buf_readaheads_succeeded	kIndexed	kInfo	kTrace
traced_buf_trace_writer_packet_loss	kIndexed	kDataLoss	kTrace	The tracing service observed packet loss for this buffer during this tracing session. This also counts packet loss that happened before the RING_BUFFER start or after the DISCARD buffer end.
traced_buf_sequence_packet_loss	kIndexed	kDataLoss	kAnalysis	The number of groups of consecutive packets lost in each sequence for this buffer
traced_buf_incremental_sequences_dropped	kIndexed	kDataLoss	kAnalysis
traced_buf_write_wrap_count	kIndexed	kInfo	kTrace
traced_clone_started_timestamp_ns	kSingle	kInfo	kTrace	The timestamp when the clone snapshot operation for this trace started
traced_clone_trigger_timestamp_ns	kSingle	kInfo	kTrace	The timestamp when trigger for the clone snapshot operation for this trace was received
traced_chunks_discarded	kSingle	kInfo	kTrace
traced_data_sources_registered	kSingle	kInfo	kTrace
traced_data_sources_seen	kSingle	kInfo	kTrace
traced_final_flush_failed	kSingle	kDataLoss	kTrace
traced_final_flush_succeeded	kSingle	kInfo	kTrace
traced_flushes_failed	kSingle	kDataLoss	kTrace
traced_flushes_requested	kSingle	kInfo	kTrace
traced_flushes_succeeded	kSingle	kInfo	kTrace
traced_patches_discarded	kSingle	kInfo	kTrace
traced_producers_connected	kSingle	kInfo	kTrace
traced_producers_seen	kSingle	kInfo	kTrace
traced_total_buffers	kSingle	kInfo	kTrace
traced_tracing_sessions	kSingle	kInfo	kTrace
track_event_parser_errors	kSingle	kInfo	kAnalysis
track_event_dropped_packets_outside_of_range_of_interest	\ kSingle	kInfo	kAnalysis	The number of TrackEvent packets dropped by trace processor due to being outside of the range of interest. This happens if a trace has a
track_event_tokenizer_errors	kSingle	kInfo	kAnalysis
track_event_thread_invalid_end	kSingle	kError	kTrace	The end event for a thread track does not match a track event begin event. This can happen on mixed atrace/track_event traces and is usually caused by data loss or bugs when the events are emitted. The outcome of this is that slices can appear to be closed before they were closed in reality
tokenizer_skipped_packets	kSingle	kInfo	kAnalysis
vmstat_unknown_keys	kSingle	kError	kAnalysis
psi_unknown_resource	kSingle	kError	kAnalysis
vulkan_allocations_invalid_string_id	\ kSingle	kError	kTrace
clock_sync_failure	kSingle	kError	kAnalysis
clock_sync_cache_miss	kSingle	kInfo	kAnalysis
process_tracker_errors	kSingle	kError	kAnalysis
json_tokenizer_failure	kSingle	kError	kTrace
json_parser_failure	kSingle	kError	kTrace
json_display_time_unit	kSingle	kInfo	kTrace	The displayTimeUnit key was set in the JSON trace. In some prior versions of trace processor this key could effect how the trace processor parsed timestamps and durations. In this version the key is ignored which more closely matches the bavahiour of catapult.
heap_graph_invalid_string_id	kIndexed	kError	kTrace
heap_graph_non_finalized_graph	kSingle	kError	kTrace
heap_graph_malformed_packet	kIndexed	kError	kTrace
heap_graph_missing_packet	kIndexed	kError	kTrace
heapprofd_buffer_corrupted	kIndexed	kError	kTrace	Shared memory buffer corrupted. This is a bug or memory corruption in the target. Indexed by target upid.
heapprofd_hit_guardrail	kIndexed	kError	kTrace	HeapprofdConfig specified a CPU or Memory Guardrail that was hit. Indexed by target upid.
heapprofd_buffer_overran	kIndexed	kDataLoss	kTrace	The shared memory buffer between the target and heapprofd overran. The profile was truncated early. Indexed by target upid.
heapprofd_client_error	kIndexed	kError	kTrace	The heapprofd client ran into a problem and disconnected. See profile_packet.proto for error codes.
heapprofd_client_disconnected	kIndexed	kInfo	kTrace
heapprofd_malformed_packet	kIndexed	kError	kTrace
heapprofd_missing_packet	kSingle	kError	kTrace
heapprofd_rejected_concurrent	kIndexed	kError	kTrace
heapprofd_non_finalized_profile	kSingle	kError	kTrace
heapprofd_sampling_interval_adjusted	\ kIndexed	kInfo	kTrace	By how many byes the interval for PID was increased by adaptive sampling.
heapprofd_unwind_time_us	kIndexed	kInfo	kTrace	Time spent unwinding callstacks.
heapprofd_unwind_samples	kIndexed	kInfo	kTrace	Number of samples unwound.
heapprofd_client_spinlock_blocked	kIndexed	kInfo	kTrace	Time (us) the heapprofd client was blocked on the spinlock.
heapprofd_last_profile_timestamp	kIndexed	kInfo	kTrace	The timestamp (in trace time) for the last dump for a process
symbolization_tmp_build_id_not_found	kSingle	kError	kAnalysis	Number of file mappings in /data/local/tmp without a build id. Symbolization doesn't work for executables in /data/local/tmp because of SELinux. Please use /data/local/tests
metatrace_overruns	kSingle	kError	kTrace
packages_list_has_parse_errors	kSingle	kError	kTrace
packages_list_has_read_errors	kSingle	kError	kTrace
game_intervention_has_parse_errors	kSingle	kError	kTrace	One or more parsing errors occurred. This could result from unknown game more or intervention added to the file to be parsed.
game_intervention_has_read_errors	kSingle	kError	kTrace	The file to be parsed can't be opened. This can happend when the file name is not found or no permission to access the file
compact_sched_has_parse_errors	kSingle	kError	kTrace
misplaced_end_event	kSingle	kDataLoss	kAnalysis
truncated_sys_write_duration	kSingle	kInfo	kAnalysis	Count of sys_write slices that have a truncated duration to resolve nesting incompatibilities with atrace slices. Real durations can be recovered via the \|raw\| table.
compact_sched_switch_skipped	kSingle	kInfo	kAnalysis
compact_sched_waking_skipped	kSingle	kInfo	kAnalysis
empty_chrome_metadata	kSingle	kError	kTrace
ninja_parse_errors	kSingle	kError	kTrace
perf_cpu_lost_records	kIndexed	kDataLoss	kTrace	Count of perf samples lost due to kernel buffer overruns. The trace
perf_process_shard_count	kIndexed	kInfo	kTrace
perf_chosen_process_shard	kIndexed	kInfo	kTrace
perf_guardrail_stop_ts	kIndexed	kDataLoss	kTrace
perf_unknown_record_type	kIndexed	kInfo	kAnalysis
perf_record_skipped	kIndexed	kError	kAnalysis
perf_samples_skipped	kSingle	kError	kAnalysis	Count of skipped perf samples that otherwise matched the tracing config. This will cause a process to be completely absent from the
perf_counter_skipped_because_no_cpu	kSingle	kError	kAnalysis
perf_features_skipped	kIndexed	kInfo	kAnalysis
perf_samples_cpu_mode_unknown	kSingle	kError	kAnalysis
perf_samples_skipped_dataloss	kSingle	kDataLoss	kTrace
perf_dummy_mapping_used	kSingle	kInfo	kAnalysis
perf_aux_missing	kSingle	kDataLoss	kTrace	Number of bytes missing in AUX data streams due to missing PREF_RECORD_AUX messages.
perf_aux_ignored	kSingle	kInfo	kTrace	AUX data was ignored because the proper parser is not implemented.
perf_aux_lost	kSingle	kDataLoss	kTrace	Gaps in the AUX data stream pased to the tokenizer.
perf_aux_truncated	kSingle	kDataLoss	kTrace	Data was truncated when being written to the AUX stream at the source.
perf_aux_partial	kSingle	kDataLoss	kTrace	The PERF_RECORD_AUX contained partial data.
perf_aux_collision	kSingle	kDataLoss	kTrace	The collection of a sample colliden with another. You should reduce the rate at which samples are collected.
perf_auxtrace_missing	kSingle	kDataLoss	kTrace	Number of bytes missing in AUX data streams due to missing PREF_RECORD_AUXTRACE messages.
perf_unknown_aux_data	kIndexed	kDataLoss	kTrace	AUX data type encountered for which there is no known parser.
perf_no_tsc_data	kSingle	kInfo	kTrace	TSC data unavailable. Will be unable to translate HW clocks.
spe_no_timestamp	kSingle	kInfo	kTrace	SPE record with no timestamp. Will try our best to assign a timestamp.
spe_record_dropped	kSingle	kDataLoss	kTrace	SPE record dropped. E.g. Unable to assign it a timestamp.
etm_no_importer	kSingle	kError	kAnalysis	Unable to parse ETM data because TraceProcessor was not compiled to support it. Make sure you enable the `enable_perfetto_etm_importer` GN flag.
memory_snapshot_parser_failure	kSingle	kError	kAnalysis
thread_time_in_state_unknown_cpu_freq	\ kSingle	kError	kAnalysis
ftrace_packet_before_tracing_start	kSingle	kInfo	kAnalysis	An ftrace packet was seen before the tracing start timestamp from the tracing service. This happens if the ftrace buffers were not cleared properly. These packets are silently dropped by trace processor.
sorter_push_event_out_of_order	kSingle	kError	kTrace	Trace events are out of order event after sorting. This can happen
unknown_extension_fields	kSingle	kError	kTrace
network_trace_intern_errors	kSingle	kInfo	kAnalysis
network_trace_parse_errors	kSingle	kInfo	kAnalysis
atom_timestamp_missing	kSingle	kError	kTrace	The corresponding timestamp_nanos entry for a StatsdAtom was missing. Defaulted to inaccurate packet timestamp.
atom_unknown	kSingle	kInfo	kAnalysis	Unknown statsd atom. Atom descriptor may need to be updated
v8_intern_errors	\ kSingle	kDataLoss	kAnalysis	Failed to resolve V8 interned data.
v8_isolate_has_no_code_range	\ kSingle	kError	kAnalysis	V8 isolate had no code range. THis is currently no supported and means we will be unable to parse JS code events for this isolate.
v8_no_defaults	\ kSingle	kDataLoss	kAnalysis	Failed to resolve V8 default data.
v8_no_code_range	\ kSingle	kError	kAnalysis	V8 isolate had no code range.
v8_unknown_code_type	kSingle	kError	kAnalysis
v8_code_load_missing_code_range	kSingle	kError	kAnalysis	V8 load had no code range or an empty one. Event ignored.
winscope_inputmethod_clients_parse_errors	\ kSingle	kError	kAnalysis
winscope_inputmethod_manager_service_parse_errors	\ kSingle	kError	kAnalysis
winscope_inputmethod_service_parse_errors	\ kSingle	kError	kAnalysis
winscope_sf_layers_parse_errors	kSingle	kError	kAnalysis
winscope_sf_transactions_parse_errors	\ kSingle	kError	kAnalysis
winscope_shell_transitions_parse_errors	\ kSingle	kError	kAnalysis
winscope_protolog_invalid_interpolation_parse_errors	\ kSingle	kInfo	kAnalysis	ProtoLog message string has invalid interplation parameter.
winscope_protolog_missing_interned_arg_parse_errors	\ kSingle	kInfo	kAnalysis	Failed to find interned ProtoLog argument.
winscope_protolog_missing_interned_stacktrace_parse_errors	\ kSingle	kInfo	kAnalysis	Failed to find interned ProtoLog stacktrace.
winscope_protolog_message_decoding_failed	\ kSingle	kInfo	kAnalysis	Failed to decode ProtoLog message.
winscope_protolog_view_config_collision	\ kSingle	kInfo	kAnalysis	Got a viewer config collision!
winscope_viewcapture_parse_errors	\ kSingle	kError	kAnalysis
winscope_viewcapture_missing_interned_string_parse_errors	\ kSingle	kError	kAnalysis	Failed to find interned ViewCapture string.
winscope_windowmanager_parse_errors	kSingle	kError	kAnalysis
jit_unknown_frame	kSingle	kDataLoss	kTrace	Indicates that we were unable to determine the function for a frame in a jitted memory region
ftrace_missing_event_id	kSingle	kInfo	kAnalysis	Indicates that the ftrace event was dropped because the event id was missing. This is an 'info' stat rather than an error stat because this can be legitimately missing due to proto filtering.
android_input_event_parse_errors	kSingle	kInfo	kAnalysis
mali_unknown_mcu_state_id	kSingle	kError	kAnalysis	An invalid Mali GPU MCU state ID was detected.
pixel_modem_negative_timestamp	kSingle	kError	kAnalysis	A negative timestamp was received from a Pixel modem event.
legacy_v8_cpu_profile_invalid_callsite	kSingle	kError	kTrace	Indicates a callsite in legacy v8 CPU profiling is invalid. This is a sign that the trace is malformed.
legacy_v8_cpu_profile_invalid_sample	kSingle	kError	kTrace	Indicates a sample in legacy v8 CPU profile is invalid. This will cause CPU samples to be missing in the UI. This is a sign that the trace is malformed.
config_write_into_file_no_flush	kSingle	kError	kTrace	The trace was collected with the `write_into_file` option set but without `flush_period_ms` being set. This will cause the trace to be fully loaded into memory and use significantly more memory than necessary.
config_write_into_file_discard	kIndexed	kDataLoss	kTrace	The trace was collected with the `write_into_file` option set but uses a `DISCARD` buffer. This configuration is strongly discouraged and can cause mysterious data loss in the trace. Please use `RING_BUFFER` buffers instead.
hprof_string_counter	kSingle	kInfo	kAnalysis	Number of strings encountered.
hprof_class_counter	kSingle	kInfo	kAnalysis	Number of classes encountered.
hprof_heap_dump_counter	kSingle	kInfo	kAnalysis	Number of heap dumps encountered.
hprof_instance_counter	kSingle	kInfo	kAnalysis	Number of instances encountered.
hprof_object_array_counter	kSingle	kInfo	kAnalysis	Number of object arrays encountered.
hprof_primitive_array_counter	kSingle	kInfo	kAnalysis	Number of primitive arrays encountered.
hprof_root_counter	kSingle	kInfo	kAnalysis	Number of roots encountered.
hprof_reference_counter	kSingle	kInfo	kAnalysis	Number of references encountered.
hprof_record_counter	kSingle	kInfo	kAnalysis	Total number of records parsed.
hprof_field_value_errors	kSingle	kError	kAnalysis	Number of field value parsing errors. This indicates a malformed hprof file. Check if the hprof opens correctly in a tool like AHAT. Missing values could yield incorrect native object sizes.
hprof_class_errors	kSingle	kError	kAnalysis	Number of class parsing errors encountered. This indicates a malformed hprof file. Check if the hprof opens correctly in a tool
hprof_header_errors	kSingle	kError	kAnalysis	Number of header parsing errors. This indicates a malformed hprof file with invalid or missing header information. The file may be corrupted or might not be a valid hprof file. There may not be any heap graph data parsed.
hprof_heap_dump_errors	kSingle	kError	kAnalysis	Number of heap dump parsing errors. This indicates a malformed hprof file with corrupted heap segments. Check if the hprof opens correctly in a tool like AHAT. Missing heap dump sections can lead to
hprof_primitive_array_parsing_errors	kSingle	kError	kAnalysis	Number of primitive array parsing errors. This indicates a malformed hprof file. Check if the hprof opens correctly in a tool like AHAT. Primitive arrays like bytes[] missing can dramatically affect the overall size of the heap graph.
hprof_reference_errors	kSingle	kError	kAnalysis	Number of object reference errors encountered. This indicates a malformed hprof file. Check if the hprof opens correctly in a tool like AHAT. Missing references will affect the overall size of the heap graph.
trace_sorter_negative_timestamp_dropped	kSingle	kError	kTrace	A negative timestamp was received by the TraceSorter and was dropped. Negative timestamps are not supported by trace processor and the presence of one is usually a sign that something went wrong while recording a trace. Common causes of this include incorrect
slice_drop_overlapping_complete_event	kSingle	kError	kTrace	A complete slice was dropped because it overlaps with another slice. This can happen e.g. in JSON traces using X events or in other cases where a duration is part of the trace. To solve this problem make sure that your X events do not overlap on the same track (e.g. thread/process)