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6protos/perfetto/metrics/android/process_metadata.protoperfetto.protos"
AndroidProcessMetadata
name (	Rname
uid (RuidI
package (2/.perfetto.protos.AndroidProcessMetadata.PackageRpackageY
packages_for_uid (2/.perfetto.protos.AndroidProcessMetadata.PackageRpackagesForUidv
Package!
package_name (	RpackageName(
apk_version_code (RapkVersionCode

debuggable (R
debuggableJJJJ

Cprotos/perfetto/metrics/android/android_frame_timeline_metric.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"
AndroidFrameTimelineMetric!
total_frames (RtotalFrames*
missed_app_frames (RmissedAppFrames%
dropped_frames (R
droppedFramesV
process (2<.perfetto.protos.AndroidFrameTimelineMetric.ProcessBreakdownRprocess
ProcessBreakdownA
process (2'.perfetto.protos.AndroidProcessMetadataRprocess!
total_frames (RtotalFrames#

missed_frames (RmissedFrames*
missed_app_frames (RmissedAppFrames(
missed_sf_frames (RmissedSfFrames"

frame_dur_max (RframeDurMax"

frame_dur_avg	 (RframeDurAvg"

frame_dur_p50
 (RframeDurP50"

frame_dur_p90 (RframeDurP90"

frame_dur_p95 (RframeDurP95"

frame_dur_p99
 (RframeDurP99'
frame_dur_ms_p50 (R
frameDurMsP50'
frame_dur_ms_p90 (R
frameDurMsP90'
frame_dur_ms_p95 (R
frameDurMsP95'
frame_dur_ms_p99 (R
frameDurMsP99%
dropped_frames (R
droppedFramesJJJ

1protos/perfetto/metrics/android/batt_metric.protoperfetto.protos"
AndroidBatteryMetric`
battery_counters (25.perfetto.protos.AndroidBatteryMetric.BatteryCountersRbatteryCountersf
battery_aggregates (27.perfetto.protos.AndroidBatteryMetric.BatteryAggregatesRbatteryAggregatesZ
suspend_period (23.perfetto.protos.AndroidBatteryMetric.SuspendPeriodR
suspendPeriod
BatteryCounters!
timestamp_ns (RtimestampNs,
charge_counter_uah (RchargeCounterUah)
capacity_percent (RcapacityPercent

current_ua (R	currentUa$
current_avg_ua (RcurrentAvgUa
BatteryAggregates-
total_screen_off_ns (RtotalScreenOffNs+
total_screen_on_ns (RtotalScreenOnNs/
total_screen_doze_ns (RtotalScreenDozeNs*
total_wakelock_ns (RtotalWakelockNs
sleep_ns (RsleepNs-
sleep_screen_off_ns (RsleepScreenOffNs+
sleep_screen_on_ns (RsleepScreenOnNs/
sleep_screen_doze_ns (RsleepScreenDozeNsS

SuspendPeriod!
timestamp_ns (RtimestampNs
duration_ns (R
durationNs

Gprotos/perfetto/metrics/android/android_blocking_calls_cuj_metric.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"
AndroidBlockingCallsCujMetricD
cuj (22.perfetto.protos.AndroidBlockingCallsCujMetric.CujRcuj
Cuj
id (Rid
name (	RnameA
process (2'.perfetto.protos.AndroidProcessMetadataRprocess
ts (Rts
dur (Rdurb
blocking_calls (2;.perfetto.protos.AndroidBlockingCallsCujMetric.BlockingCallR
blockingCalls
BlockingCall
name (	Rname
cnt (Rcnt 
total_dur_ms (R
totalDurMs

max_dur_ms (RmaxDurMs

min_dur_ms (RminDurMs

0protos/perfetto/metrics/android/cpu_metric.protoperfetto.protos"
AndroidCpuMetricL
process_info (2).perfetto.protos.AndroidCpuMetric.ProcessRprocessInfo
Metrics
mcycles (Rmcycles

runtime_ns (R	runtimeNs 
min_freq_khz (R
minFreqKhz 
max_freq_khz (R
maxFreqKhz 
avg_freq_khz (R
avgFreqKhze
CoreData
id (
RidC
metrics (2).perfetto.protos.AndroidCpuMetric.MetricsRmetricsJg
CoreTypeData
type (	RtypeC
metrics (2).perfetto.protos.AndroidCpuMetric.MetricsRmetrics
Thread
name (	RnameC
metrics (2).perfetto.protos.AndroidCpuMetric.MetricsRmetrics>
core (2*.perfetto.protos.AndroidCpuMetric.CoreDataRcoreK
	core_type (2..perfetto.protos.AndroidCpuMetric.CoreTypeDataRcoreTypeJ
Process
name (	RnameC
metrics (2).perfetto.protos.AndroidCpuMetric.MetricsRmetricsB
threads (2(.perfetto.protos.AndroidCpuMetric.ThreadRthreads>
core (2*.perfetto.protos.AndroidCpuMetric.CoreDataRcoreK
	core_type (2..perfetto.protos.AndroidCpuMetric.CoreTypeDataRcoreTypeJ

3protos/perfetto/metrics/android/camera_metric.protoperfetto.protos"
AndroidCameraMetricQ
gc_rss_and_dma (2,.perfetto.protos.AndroidCameraMetric.CounterRgcRssAndDma?
Counter
min (Rmin
max (Rmax
avg (Ravg

9protos/perfetto/metrics/android/camera_unagg_metric.protoperfetto.protos"
AndroidCameraUnaggregatedMetric[
gc_rss_and_dma (26.perfetto.protos.AndroidCameraUnaggregatedMetric.ValueRgcRssAndDma-
Value
ts (Rts
value (Rvalue

5protos/perfetto/metrics/android/display_metrics.protoperfetto.protos"
AndroidDisplayMetrics4
total_duplicate_frames (
RtotalDuplicateFrames6
duplicate_frames_logged (
RduplicateFramesLogged7
total_dpu_underrun_count (
RtotalDpuUnderrunCount2
refresh_rate_switches (
RrefreshRateSwitchesd
refresh_rate_stats (26.perfetto.protos.AndroidDisplayMetrics.RefreshRateStatRrefreshRateStatse
update_power_state (27.perfetto.protos.AndroidDisplayMetrics.UpdatePowerStateRupdatePowerState
RefreshRateStat(
refresh_rate_fps (
RrefreshRateFps
count (
Rcount 
total_dur_ms (R
totalDurMs

avg_dur_ms (RavgDurMsM
UpdatePowerState3
avg_runtime_micro_secs (
RavgRuntimeMicroSecsJ

5protos/perfetto/metrics/android/dma_heap_metric.protoperfetto.protos"
AndroidDmaHeapMetric$
avg_size_bytes (RavgSizeBytes$
min_size_bytes (RminSizeBytes$
max_size_bytes (RmaxSizeBytes3
total_alloc_size_bytes (RtotalAllocSizeBytes

1protos/perfetto/metrics/android/dvfs_metric.protoperfetto.protos"
AndroidDvfsMetric`
freq_residencies (25.perfetto.protos.AndroidDvfsMetric.FrequencyResidencyRfreqResidenciesj
BandStat

freq_value (R	freqValue

percentage (R
percentage
duration_ns (R
durationNs{
FrequencyResidency
	freq_name (	RfreqNameH
	band_stat (2+.perfetto.protos.AndroidDvfsMetric.BandStatRbandStat

4protos/perfetto/metrics/android/fastrpc_metric.protoperfetto.protos"
AndroidFastrpcMetricM
	subsystem (2/.perfetto.protos.AndroidFastrpcMetric.SubsystemR	subsystem
	Subsystem
name (	Rname$
avg_size_bytes (RavgSizeBytes$
min_size_bytes (RminSizeBytes$
max_size_bytes (RmaxSizeBytes3
total_alloc_size_bytes (RtotalAllocSizeBytes

0protos/perfetto/metrics/android/g2d_metric.protoperfetto.protos"

G2dMetrics<
g2d_hw (2%.perfetto.protos.G2dMetrics.G2dMetricRg2dHw<
g2d_sw (2%.perfetto.protos.G2dMetrics.G2dMetricRg2dSw
G2dInstance
name (	Rname
frame_count (
R
frameCount
error_count (
R
errorCount

max_dur_ms (RmaxDurMs

min_dur_ms (RminDurMs

avg_dur_ms	 (RavgDurMsJ
	G2dMetricE
	instances (2'.perfetto.protos.G2dMetrics.G2dInstanceR	instances
frame_count (
R
frameCount
error_count (
R
errorCount

max_dur_ms (RmaxDurMs

min_dur_ms (RminDurMs

avg_dur_ms	 (RavgDurMsJ

0protos/perfetto/metrics/android/gpu_metric.protoperfetto.protos"
AndroidGpuMetricG
	processes (2).perfetto.protos.AndroidGpuMetric.ProcessR	processes
mem_max (RmemMax
mem_min (RmemMin
mem_avg (RmemAvgT
freq_metrics (21.perfetto.protos.AndroidGpuMetric.FrequencyMetricRfreqMetricsh
Process
name (	Rname
mem_max (RmemMax
mem_min (RmemMin
mem_avg (RmemAvg
FrequencyMetric
gpu_id (
RgpuId
freq_max (RfreqMax
freq_min (RfreqMin
freq_avg (RfreqAvgd

used_freqs (2E.perfetto.protos.AndroidGpuMetric.FrequencyMetric.MetricsPerFrequencyR	usedFreqs`
MetricsPerFrequency
freq (Rfreq
dur_ms (RdurMs

percentage (R
percentage

0protos/perfetto/metrics/android/hwcomposer.protoperfetto.protos"
AndroidHwcomposerMetrics8
composition_total_layers (RcompositionTotalLayers4
composition_dpu_layers (RcompositionDpuLayers4
composition_gpu_layers (RcompositionGpuLayersA
composition_dpu_cached_layers (RcompositionDpuCachedLayers?
composition_sf_cached_layers (RcompositionSfCachedLayers4
composition_rcd_layers (RcompositionRcdLayers8
skipped_validation_count (RskippedValidationCount<
unskipped_validation_count (RunskippedValidationCount<
separated_validation_count (RseparatedValidationCount8
unknown_validation_count	 (RunknownValidationCount8
avg_all_execution_time_ms
 (RavgAllExecutionTimeMs@
avg_skipped_execution_time_ms (RavgSkippedExecutionTimeMsD
avg_unskipped_execution_time_ms (RavgUnskippedExecutionTimeMsD
avg_separated_execution_time_ms
 (RavgSeparatedExecutionTimeMsb
dpu_vote_metrics (28.perfetto.protos.AndroidHwcomposerMetrics.DpuVoteMetricsRdpuVoteMetricsk
metrics_per_display (2;.perfetto.protos.AndroidHwcomposerMetrics.MetricsPerDisplayRmetricsPerDisplay
DpuVoteMetrics
tid (
Rtid+
avg_dpu_vote_clock (RavgDpuVoteClock,
avg_dpu_vote_avg_bw (RavgDpuVoteAvgBw.
avg_dpu_vote_peak_bw (RavgDpuVotePeakBw*
avg_dpu_vote_rt_bw (RavgDpuVoteRtBw
MetricsPerDisplay

display_id (	R	displayId8
composition_total_layers (RcompositionTotalLayers4
composition_dpu_layers (RcompositionDpuLayers4
composition_gpu_layers (RcompositionGpuLayersA
composition_dpu_cached_layers (RcompositionDpuCachedLayers?
composition_sf_cached_layers (RcompositionSfCachedLayers4
composition_rcd_layers (RcompositionRcdLayers8
skipped_validation_count (RskippedValidationCount<
unskipped_validation_count	 (RunskippedValidationCount<
separated_validation_count
 (RseparatedValidationCount8
unknown_validation_count (RunknownValidationCount8
avg_all_execution_time_ms (RavgAllExecutionTimeMs@
avg_skipped_execution_time_ms
 (RavgSkippedExecutionTimeMsD
avg_unskipped_execution_time_ms (RavgUnskippedExecutionTimeMsD
avg_separated_execution_time_ms (RavgSeparatedExecutionTimeMs

1protos/perfetto/metrics/android/hwui_metric.protoperfetto.protos"
ProcessRenderInfo!
process_name (	RprocessName#
rt_cpu_time_ms (RrtCpuTimeMs(
draw_frame_count (
RdrawFrameCount$
draw_frame_max (RdrawFrameMax$
draw_frame_min (RdrawFrameMin$
draw_frame_avg (RdrawFrameAvg
flush_count (
R
flushCount
	flush_max (RflushMax
	flush_min	 (RflushMin
	flush_avg
 (RflushAvg,
prepare_tree_count (
RprepareTreeCount(
prepare_tree_max (RprepareTreeMax(
prepare_tree_min
 (RprepareTreeMin(
prepare_tree_avg (RprepareTreeAvg0
gpu_completion_count (
RgpuCompletionCount,
gpu_completion_max (RgpuCompletionMax,
gpu_completion_min (RgpuCompletionMin,
gpu_completion_avg (RgpuCompletionAvg&
ui_record_count (
R
uiRecordCount"

ui_record_max (RuiRecordMax"

ui_record_min (RuiRecordMin"

ui_record_avg (RuiRecordAvg0
shader_compile_count (
RshaderCompileCount.
shader_compile_time (RshaderCompileTime,
shader_compile_avg (RshaderCompileAvg&
cache_hit_count (
R
cacheHitCount$
cache_hit_time (RcacheHitTime"

cache_hit_avg (RcacheHitAvg(
cache_miss_count (
RcacheMissCount&
cache_miss_time (R
cacheMissTime$
cache_miss_avg (RcacheMissAvg/
graphics_cpu_mem_max  (RgraphicsCpuMemMax/
graphics_cpu_mem_min! (RgraphicsCpuMemMin/
graphics_cpu_mem_avg" (RgraphicsCpuMemAvg/
graphics_gpu_mem_max# (RgraphicsGpuMemMax/
graphics_gpu_mem_min$ (RgraphicsGpuMemMin/
graphics_gpu_mem_avg% (RgraphicsGpuMemAvg&
texture_mem_max& (R
textureMemMax&
texture_mem_min' (R
textureMemMin&
texture_mem_avg( (R
textureMemAvg
all_mem_max) (R	allMemMax
all_mem_min* (R	allMemMin
all_mem_avg+ (R	allMemAvg"Z
AndroidHwuiMetricE
process_info (2".perfetto.protos.ProcessRenderInfoRprocessInfo

0protos/perfetto/metrics/android/ion_metric.protoperfetto.protos"
AndroidIonMetric@
buffer (2(.perfetto.protos.AndroidIonMetric.BufferRbuffer
Buffer
name (	Rname$
avg_size_bytes (RavgSizeBytes$
min_size_bytes (RminSizeBytes$
max_size_bytes (RmaxSizeBytes3
total_alloc_size_bytes (RtotalAllocSizeBytes

8protos/perfetto/metrics/android/irq_runtime_metric.protoperfetto.protos"
AndroidIrqRuntimeMetricP
hw_irq (29.perfetto.protos.AndroidIrqRuntimeMetric.IrqRuntimeMetricRhwIrqP
sw_irq (29.perfetto.protos.AndroidIrqRuntimeMetric.IrqRuntimeMetricRswIrqG
IrqSlice
irq_name (	RirqName
ts (Rts
dur (Rdur
ThresholdMetric
	threshold (	R	threshold0
over_threshold_count (RoverThresholdCount#

anomaly_ratio (RanomalyRatio
IrqRuntimeMetric
max_runtime (R
maxRuntime
total_count (R
totalCountc
threshold_metric (28.perfetto.protos.AndroidIrqRuntimeMetric.ThresholdMetricRthresholdMetric_
longest_irq_slices (21.perfetto.protos.AndroidIrqRuntimeMetric.IrqSliceRlongestIrqSlices

5protos/perfetto/metrics/android/jank_cuj_metric.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"
AndroidJankCujMetric;
cuj (2).perfetto.protos.AndroidJankCujMetric.CujRcuj
Cuj
id (Rid
name (	RnameA
process (2'.perfetto.protos.AndroidProcessMetadataRprocess
ts (Rts
dur (RdurA
frame (2+.perfetto.protos.AndroidJankCujMetric.FrameRframeF
sf_frame
 (2+.perfetto.protos.AndroidJankCujMetric.FrameRsfFrameV
counter_metrics (2-.perfetto.protos.AndroidJankCujMetric.MetricsRcounterMetricsX
timeline_metrics (2-.perfetto.protos.AndroidJankCujMetric.MetricsRtimelineMetricsR

trace_metrics	 (2-.perfetto.protos.AndroidJankCujMetric.MetricsRtraceMetrics

layer_name (	R	layerName
Frame!
frame_number (RframeNumber
vsync (Rvsync
ts (Rts
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missed_frames (RmissedFrames*
missed_app_frames (RmissedAppFrames(
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frame_dur_max (RframeDurMax"

frame_dur_avg (RframeDurAvg"

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9protos/perfetto/metrics/android/java_heap_histogram.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"
JavaHeapHistogramW
instance_stats (20.perfetto.protos.JavaHeapHistogram.InstanceStatsR
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5protos/perfetto/metrics/android/java_heap_stats.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"

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reachable_obj_count (RreachableObjCount2
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0protos/perfetto/metrics/android/lmk_metric.protoperfetto.protos"
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7protos/perfetto/metrics/android/lmk_reason_metric.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"
AndroidLmkReasonMetric?
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0protos/perfetto/metrics/android/mem_metric.protoperfetto.protos"
AndroidMemoryMetric\
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priority_breakdown (26.perfetto.protos.AndroidMemoryMetric.PriorityBreakdownRpriorityBreakdown
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file_rss (2,.perfetto.protos.AndroidMemoryMetric.CounterRfileRss@
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6protos/perfetto/metrics/android/mem_unagg_metric.protoperfetto.protos"
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anon_and_swap (26.perfetto.protos.AndroidMemoryUnaggregatedMetric.ValueRanonAndSwapJ
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6protos/perfetto/metrics/android/multiuser_metric.protoperfetto.protos"
AndroidMultiuserMetricR
user_switch (21.perfetto.protos.AndroidMultiuserMetric.EventDataR
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cpu_mcycles (R
cpuMcycles%
cpu_percentage (R
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identifier (	R
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4protos/perfetto/metrics/android/network_metric.protoperfetto.protos"
AndroidNetworkMetricP
net_devices (2/.perfetto.protos.AndroidNetworkMetric.NetDeviceR
netDevicesU

net_rx_action (21.perfetto.protos.AndroidNetworkMetric.NetRxActionRnetRxAction/
retransmission_rate (RretransmissionRate$
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net_tx_action (21.perfetto.protos.AndroidNetworkMetric.NetTxActionRnetTxActionN

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last_packet_timestamp_ns (RlastPacketTimestampNs
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intervalNs$
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avgFreqKhz
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2protos/perfetto/metrics/android/other_traces.protoperfetto.protos"N
AndroidOtherTracesMetric2
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2protos/perfetto/metrics/android/package_list.protoperfetto.protos"
AndroidPackageListG
packages (2+.perfetto.protos.AndroidPackageList.PackageRpackagesa
Package!
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5protos/perfetto/metrics/android/powrails_metric.protoperfetto.protos"
AndroidPowerRailsN
power_rails (2-.perfetto.protos.AndroidPowerRails.PowerRailsR
powerRails4
avg_total_used_power_mw (RavgTotalUsedPowerMwN

EnergyData!
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energy_uws (R	energyUws

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energy_data (2-.perfetto.protos.AndroidPowerRails.EnergyDataR
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avg_used_power_mw (RavgUsedPowerMw

4protos/perfetto/metrics/android/profiler_smaps.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"

ProfilerSmapsC
instance (2'.perfetto.protos.ProfilerSmaps.InstanceRinstancey
Mapping
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InstanceA
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mappings (2&.perfetto.protos.ProfilerSmaps.MappingRmappings

7protos/perfetto/metrics/android/rt_runtime_metric.protoperfetto.protos"
AndroidRtRuntimeMetric
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0protos/perfetto/metrics/android/simpleperf.protoperfetto.protos"
AndroidSimpleperfMetric!
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Thread
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4protos/perfetto/metrics/android/startup_metric.protoperfetto.protos6protos/perfetto/metrics/android/process_metadata.proto"-
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other_processes_spawned_count (
RotherProcessesSpawnedCount_
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time_gc_total (2+.perfetto.protos.AndroidStartupMetric.SliceRtimeGcTotalP
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4protos/perfetto/metrics/android/surfaceflinger.protoperfetto.protos"
AndroidSurfaceflingerMetric#

missed_frames (
RmissedFrames*
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0protos/perfetto/metrics/android/task_names.protoperfetto.protos"
AndroidTaskNamesC
process (2).perfetto.protos.AndroidTaskNames.ProcessRprocess
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3protos/perfetto/metrics/android/trace_quality.protoperfetto.protos"
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?protos/perfetto/metrics/android/android_trusty_workqueues.protoperfetto.protos"
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9protos/perfetto/metrics/android/unsymbolized_frames.protoperfetto.protos"
UnsymbolizedFramesA
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3protos/perfetto/metrics/android/binder_metric.protoperfetto.protos"
AndroidBinderMetrice
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clientProcess#

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?protos/perfetto/metrics/android/monitor_contention_metric.protoperfetto.protos"

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blocked_function_count (RblockedFunctionCount
3
%protos/perfetto/metrics/metrics.protoperfetto.protosCprotos/perfetto/metrics/android/android_frame_timeline_metric.proto1protos/perfetto/metrics/android/batt_metric.protoGprotos/perfetto/metrics/android/android_blocking_calls_cuj_metric.proto0protos/perfetto/metrics/android/cpu_metric.proto3protos/perfetto/metrics/android/camera_metric.proto9protos/perfetto/metrics/android/camera_unagg_metric.proto5protos/perfetto/metrics/android/display_metrics.proto5protos/perfetto/metrics/android/dma_heap_metric.proto1protos/perfetto/metrics/android/dvfs_metric.proto4protos/perfetto/metrics/android/fastrpc_metric.proto0protos/perfetto/metrics/android/g2d_metric.proto0protos/perfetto/metrics/android/gpu_metric.proto0protos/perfetto/metrics/android/hwcomposer.proto1protos/perfetto/metrics/android/hwui_metric.proto0protos/perfetto/metrics/android/ion_metric.proto8protos/perfetto/metrics/android/irq_runtime_metric.proto5protos/perfetto/metrics/android/jank_cuj_metric.proto9protos/perfetto/metrics/android/java_heap_histogram.proto5protos/perfetto/metrics/android/java_heap_stats.proto0protos/perfetto/metrics/android/lmk_metric.proto7protos/perfetto/metrics/android/lmk_reason_metric.proto0protos/perfetto/metrics/android/mem_metric.proto6protos/perfetto/metrics/android/mem_unagg_metric.proto6protos/perfetto/metrics/android/multiuser_metric.proto4protos/perfetto/metrics/android/network_metric.proto2protos/perfetto/metrics/android/other_traces.proto2protos/perfetto/metrics/android/package_list.proto5protos/perfetto/metrics/android/powrails_metric.proto4protos/perfetto/metrics/android/profiler_smaps.proto7protos/perfetto/metrics/android/rt_runtime_metric.proto0protos/perfetto/metrics/android/simpleperf.proto4protos/perfetto/metrics/android/startup_metric.proto4protos/perfetto/metrics/android/surfaceflinger.proto0protos/perfetto/metrics/android/task_names.proto3protos/perfetto/metrics/android/trace_quality.proto?protos/perfetto/metrics/android/android_trusty_workqueues.proto9protos/perfetto/metrics/android/unsymbolized_frames.proto3protos/perfetto/metrics/android/binder_metric.proto?protos/perfetto/metrics/android/monitor_contention_metric.proto"

TraceMetadata*
trace_duration_ns (RtraceDurationNs

trace_uuid (	R	traceUuid:
android_build_fingerprint (	RandroidBuildFingerprintI
!statsd_triggering_subscription_id (RstatsdTriggeringSubscriptionId(
trace_size_bytes (RtraceSizeBytes#

trace_trigger (	RtraceTrigger.
unique_session_name (	RuniqueSessionName,
trace_config_pbtxt	 (	RtraceConfigPbtxt*
sched_duration_ns
 (RschedDurationNsJ"
TraceAnalysisStats<
stat (2(.perfetto.protos.TraceAnalysisStats.StatRstat
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idx (
RidxH
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source (2*.perfetto.protos.TraceAnalysisStats.SourceRsource
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Severity
SEVERITY_UNKNOWN