traced_perf parsing support in ui.perfetto.dev

[oliver wang]

Hi,

Noticed perfetto already support traced_perf service/producer in Android S/T, and i tried to capture some trace with following config. It seems trace events logging works because I got a 300KB trace file. However when i upload this file to ui.perfetto.dev, it shows nothing but some empty lines.

```

adb shell perfetto \
  -c - --txt \
  -o /data/misc/perfetto-traces/trace \
<<EOF

buffers: {
    size_kb: 63488
    fill_policy: RING_BUFFER
}

data_sources: {
    config {
        name: "linux.perf"
        perf_event_config: {
            timebase {
                frequency: 4000
            }
            target_pid: 1243
            callstack_sampling {
                scope {
                   target_pid: 1243
                }
                kernel_frames: true
            }
        }
    }
}
duration_ms: 10000

EOF

```

Any ideas?

Thanks,

Oliver

[oliver wang]

[Lalit Maganti]

The flamegraph for perf profiles is currently hidden behind a feature flag. In the "Flags" section, you need to enable "Perf Sample Flamegraph".

+Ryan Savitski should this be enabled by default at this point? The flamegraph is pretty stable AFAIK these days?

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