600K increase in V8 large object space size on Nexus9 |
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Issue descriptionSee ChromiumPerf/android-nexus9/memory.top_10_mobile / memory:chrome:renderer_processes:reported_by_chrome:v8:heap:large_object_space:effective_size_avg / background
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Jan 11 2017
=== Auto-CCing suspected CL author ishell@chromium.org === Hi ishell@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 : ishell Commit : bcb3af59be2c52ca13a0adae500f042a64093b6d Date : Sun Nov 13 09:38:15 2016 Subject: [ic] Support data handlers that represent transitioning stores. Bisect Details Configuration: android_nexus9_perf_bisect Benchmark : memory.top_10_mobile Metric : memory:chrome:renderer_processes:reported_by_chrome:v8:heap:large_object_space:effective_size_avg/background/after_http_www_baidu_com_s_word_google Revision Result N chromium@431807 0.0 +- 0.0 6 good chromium@431856 0.0 +- 0.0 6 good chromium@431862 0.0 +- 0.0 6 good chromium@431864 0.0 +- 0.0 6 good chromium@431864,v8@5d3ce7ea4f 0.0 +- 0.0 6 good chromium@431864,v8@bcb3af59be 524288 +- 0.0 6 bad <-- chromium@431864,v8@a9f553bada 524288 +- 0.0 6 bad chromium@431865 524288 +- 0.0 6 bad chromium@431868 524288 +- 0.0 6 bad chromium@431880 524288 +- 0.0 6 bad chromium@431904 524288 +- 0.0 6 bad 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 --story-filter=http.www.baidu.com.s.word.google memory.top_10_mobile Debug Info https://chromeperf.appspot.com/buildbucket_job_status/8990757351720314560 Is this bisect wrong? https://chromeperf.appspot.com/bad_bisect?try_job_id=5864178025234432 | 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 Tests>AutoBisect. Thank you!
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Jan 11 2017
Bisect went definitely wrong here: 1) My CL does nothing with large space. 2) I don't beleve zero result for chromium@431864,v8@5d3ce7ea4f Restarted the bisection.
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Jan 12 2017
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Jan 12 2017
The regression is only indirectly caused by this CL (code-space size increases push some snapshot allocations to LO space). See https://bugs.chromium.org/p/v8/issues/detail?id=5831. Can't merge into a V8 issue, so closing as WontFix. |
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Comment 1 by 42576172...@developer.gserviceaccount.com
, Jan 11 2017