This issue is derived from https://chromium-review.googlesource.com/c/chromium/src/+/1143435#message-e93923e99765f9c8fc762ba6db26553a54a5f6ae From thakis@'s comment ``` https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_msan_rel_ng/1151 https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_chromeos_msan_rel_ng/834 Looks like the tests (at least browser_tests) do take about 2x as long on cros than on linux O_o Comparing https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8940582102777543776/+/steps/generate_build_files__with_patch_/0/stdout https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8940582102777543792/+/steps/generate_build_files__with_patch_/0/stdout the only difference is `target_os="chromeos"`. Weird. ```
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/54671d97894b47be18a43c542538cdac934cf40c commit 54671d97894b47be18a43c542538cdac934cf40c Author: Takuto Ikuta <tikuta@chromium.org> Date: Thu Jul 19 19:06:35 2018 Increase the number of shards for some tests This is to make CQ check faster when update clang like below. https://chromium-review.googlesource.com/c/chromium/src/+/1143094 This CL increases the number of shards so that max shard duration reduced around 30 minutes. I use shard duration of following builds to adjust the number of shards. * https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_chromeos_asan_rel_ng/15713 * https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_chromeos_msan_rel_ng/831 Bug: 794372, 865455 Change-Id: Iee4e55af62219ba6d4f36d3ff5bcf53e5b7e9725 Reviewed-on: https://chromium-review.googlesource.com/1143435 Commit-Queue: Takuto Ikuta <tikuta@chromium.org> Reviewed-by: Nico Weber <thakis@chromium.org> Cr-Commit-Position: refs/heads/master@{#576584} [modify] https://crrev.com/54671d97894b47be18a43c542538cdac934cf40c/testing/buildbot/chromium.memory.json [modify] https://crrev.com/54671d97894b47be18a43c542538cdac934cf40c/testing/buildbot/test_suite_exceptions.pyl
CC'd some more sanitizer folks
I don't see the difference in test run time locally.
Comment 1 by thakis@chromium.org
, Jul 19Labels: Stability-Memory-MemorySanitizer