commit | 95a8b911b4ab60ed9adb80ea7225afbc032c50b6 | [log] [tgz] |
---|---|---|
author | Ryan Macnak <rmacnak@google.com> | Thu Jun 10 20:39:33 2021 +0000 |
committer | commit-bot@chromium.org <commit-bot@chromium.org> | Thu Jun 10 20:39:33 2021 +0000 |
tree | e60c500b38f24081080ae6c761ac333746e114c6 | |
parent | b25b458504c238958931d2f2aae891aaa40f9bf8 [diff] |
[vm, profiler] Increase the number of frames per Sample. In practice, the Dart stack is usually much deeper than 8 frames, causing a typical tick to chain multiple Samples together. Increasing the number of frames covered by a Sample causes the typical tick to waste less memory on the non-frame portions of linked Samples. For a run of dart2js compiling hello_world, increasing the frames-per-Sample from 8 to 32 decreases the memory required to represent all the ticks from 11930560 to 6907120 (-42%), with diminishing returns thereafter. This CL does not make a compensating decrease the default number of Samples in the buffer, so it has the effect of increasing the time range covered by the buffer for deep stacks by ~4x while only increasing memory usage a bit less than 2x. TEST=ci Change-Id: I60b17263dcb900fff4198ca6039753828295bf38 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/202308 Reviewed-by: Ben Konyi <bkonyi@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
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