== Generate perf rapport ==

 cd  /home/mmaret/Android/Sdk/ndk/23.0.7599858/simpleperf
 ./run_simpleperf_on_device.py record -g /system/bin/ovt_raw_slicer  -i /sdcard/4_water_explode.raw   -o /sdcard/out_current.test
 adb pull /data/local/tmp/perf.data .
 ./report_html.py -i perf.data
 
=== Perf camera server === 

./run_simpleperf_on_device.py record -g -p $( adb shell ps | grep camera.provider | awk '{print $2}')  --duration 5 -o perf_test.data
adb pull /data/local/tmp/perf_test.data .
./report_html.py -i perf_test.data


=== Call Graph ===
# https://android.googlesource.com/platform/prebuilts/simpleperf/+/refs/heads/ndk-r13-release/README.md
./run_simpleperf_on_device.py record -g -p $( adb shell ps | grep camera.provider | awk '{print $2}')  --duration 5 -o perf_test.data  -g --symfs .
# Or, but do not seems better
./run_simpleperf_on_device.py record -g -p $( adb shell ps | grep camera.provider | awk '{print $2}')  --duration 5 -o perf_test.data  -g --symfs . --call-graph fp
adb shell  /data/local/tmp/simpleperf report -n -g --symfs . -i /data/local/tmp/perf_test.data
adb shell /data/local/tmp/simpleperf report -n -g --symfs . -i /data/local/tmp/perf_test.data >perf.report && python3 report.py perf.report


== With perfecto ==
https://devblogs.microsoft.com/performance-diagnostics/perfetto-tooling-for-analyzing-android-linux-and-chromium-browser-performance-microsoft-performance-tools-linux-android/
https://perfetto.dev/docs/reference/trace-config-proto#PerfEventConfig



#!/usr/bin/env bash
# see https://devblogs.microsoft.com/performance-diagnostics/perfetto-tooling-for-analyzing-android-linux-and-chromium-browser-performance-microsoft-performance-tools-linux-android/
adb shell perfetto \
  -c - --txt \
  -o /data/misc/perfetto-traces/trace \
<<EOF

buffers: {
    size_kb: 63488
    fill_policy: DISCARD
}
buffers: {
    size_kb: 2048
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "linux.process_stats"
        target_buffer: 1
        process_stats_config {
            scan_all_processes_on_start: true
        }
    }
}
data_sources: {
    config {
        name: "linux.ftrace"
        ftrace_config {
            ftrace_events: "sched/sched_switch"
            ftrace_events: "power/suspend_resume"
            ftrace_events: "sched/sched_wakeup"
            ftrace_events: "sched/sched_wakeup_new"
            ftrace_events: "sched/sched_waking"
            ftrace_events: "sched/sched_process_exit"
            ftrace_events: "sched/sched_process_free"
            ftrace_events: "task/task_newtask"
            ftrace_events: "task/task_rename"
        }
    }
}
data_sources: {
    config {
        name: "linux.perf"
        perf_event_config {
        timebase {
            frequency: 1000
        }
        callstack_sampling {
            kernel_frames: true
        }
        target_cmdline: "vendor.qti.camera.provider@2.7-service_64"
    }
    }
}
duration_ms: 8000

EOF

adb pull /data/misc/perfetto-traces/trace