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1% regression in memory.top_10_mobile at 476838:476890 |
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Issue descriptionSee the link to graphs below.
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Jun 12 2017
Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8977001781699430048
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Jun 13 2017
=== Auto-CCing suspected CL author chfremer@chromium.org === Hi chfremer@chromium.org, the bisect results pointed to your CL, please take a look at the results. === BISECT JOB RESULTS === Perf regression found with culprit Suspected Commit Author : Christian Fremerey Commit : 177b9b934d8398dfb0d17b88fd9ff00f3291cca5 Date : Sat Jun 03 00:15:25 2017 Subject: Fix copy-paste error in comment in sequence_checker.h Bisect Details Configuration: android_one_perf_bisect Benchmark : memory.top_10_mobile Metric : memory:chrome:all_processes:reported_by_chrome:java_heap:effective_size_avg/background/after_https_mobile_twitter_com_justinbieber_skip_interstitial_true Change : 0.03% | 17233355.4286 -> 17237738.8889 Revision Result N chromium@476837 17233355 +- 13047.9 14 good chromium@476838 17162989 +- 5549.39 6 bad <-- chromium@476839 17149912 +- 86416.7 6 bad chromium@476840 17146929 +- 82385.6 6 bad chromium@476842 17080190 +- 356844 6 bad chromium@476852 17215960 +- 132025 14 bad chromium@476864 17236587 +- 14689.1 14 bad chromium@476890 17237739 +- 11830.9 9 bad Please refer to the following doc on diagnosing memory regressions: https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.md To Run This Test src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.top_10_mobile Debug Info https://chromeperf.appspot.com/buildbucket_job_status/8977001781699430048 Is this bisect wrong? https://chromeperf.appspot.com/bad_bisect?try_job_id=5781760601751552 | O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq | X | for more information addressing perf regression bugs. For feedback, | / \ | file a bug with component Speed>Bisection. Thank you!
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Jun 13 2017
I don't understand the result numbers. Is this average memory usage during the test? It looks like it actually went down from 476837->476838. In any case, the suspected Commit almost certainly did not cause any change to memory consumption, since all it did is changing a comment :-).
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Jun 16 2017
Yep, this test is noisy and it did in fact pinpoint your CL for a memory decrease which was within the noise. I'm going to try to re-run the bisect.
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Jun 16 2017
Actually this is just noise. |
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Comment 1 by alexclarke@chromium.org
, Jun 12 2017