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I'm using Perfetto to profile my Android app. Everything works fine and I get a trace file, which I am able to convert into an SQLite3 database, extract measurements from and visualise the results.

However, my trace throws an error when it completes:

enter image description here

The settings for the trace are:

Target platform: Andriod P
Long trace, 1m30s duration, max file size 500mb

probes: CPU coarse usage counter with 1000ms poll interval, schedualing details

The settings are configured using the perfetto UI: https://ui.perfetto.dev/#!/record?p=buffers Instructions are copied and pasted to the terminal on a Mac.

Any idea what the error is and how to fix it?

pookie
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1 Answers1

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That looks like a data loss in the central buffer, see https://perfetto.dev/docs/concepts/buffers#debugging-data-losses

Either increase the size of the central buffer size (buffers->size or reduce the file_write_period_ms setting

primiano
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