203121 2019-10-17 14:44:39 -0700 [bmalloc] Bug fix for wait time when it's in mini mode. 2019-11-07 17:29:14 -0800 1 1 1 Unclassified WebKit bmalloc WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 basuke basuke basuke commit-queue ggaren saam webkit-bug-importer ysuzuki oldest_to_newest 1581164 0 basuke 2019-10-17 14:44:39 -0700 m_waitTime is never changed on mini mode since https://trac.webkit.org/changeset/243144/webkit 1581168 1 381232 basuke 2019-10-17 14:57:26 -0700 Created attachment 381232 PATCH 1581169 2 basuke 2019-10-17 14:57:51 -0700 Simple bug fix. 1581171 3 basuke 2019-10-17 15:01:37 -0700 Oh, there's no watchOS EWS... 1581210 4 381232 ysuzuki 2019-10-17 16:05:45 -0700 Comment on attachment 381232 PATCH r=me. Yes, this is apparently not intended behavior. 1581212 5 basuke 2019-10-17 16:20:42 -0700 Thanks! 1581230 6 381232 commit-queue 2019-10-17 17:02:17 -0700 Comment on attachment 381232 PATCH Clearing flags on attachment: 381232 Committed r251268: <https://trac.webkit.org/changeset/251268> 1581231 7 commit-queue 2019-10-17 17:02:18 -0700 All reviewed patches have been landed. Closing bug. 1581232 8 webkit-bug-importer 2019-10-17 17:03:36 -0700 <rdar://problem/56391220> 1587919 9 ysuzuki 2019-11-06 14:32:58 -0800 Internally, we found that this behavior is making RAMification 1% regressed. And this is because, 1. Due to this accidental behavior, we are always using 10ms for the time interval. 2. And this works well for mini-mode. For now, I'll roll-out this change and keep mini-mode scavenging period 10ms. And another thing I would like to see is that the memory number w/ system malloc. Our bmalloc is focusing on performance, while system malloc does good thing for memory footprint in sacrifice of throughput. The purpose of Mini mode is making memory footprint small w/ small throughput loss, and this policy matches well to the system malloc. It would be possible that we could get some good memory footprint further by switching to system malloc by specifying Malloc=1 environment option. So, for now, I'll roll out this patch, (or, just removing adjusting part for mini-mode too). 1587964 10 ysuzuki 2019-11-06 15:58:10 -0800 Committed r252157: <https://trac.webkit.org/changeset/252157> 1588028 11 saam 2019-11-06 17:48:07 -0800 (In reply to Yusuke Suzuki from comment #10) > Committed r252157: <https://trac.webkit.org/changeset/252157> why roll out this code? At least we should make the code sensible instead of updating a local variable which is never used 1588065 12 ysuzuki 2019-11-06 18:42:33 -0800 (In reply to Saam Barati from comment #11) > (In reply to Yusuke Suzuki from comment #10) > > Committed r252157: <https://trac.webkit.org/changeset/252157> > > why roll out this code? At least we should make the code sensible instead of > updating a local variable which is never used Because of RAMification regression, we decide that the old broken behavior (always using 10ms) is the safest option for now. We will add a patch that is removing adjusting part for mini-mode in a separate patch. 1588068 13 ysuzuki 2019-11-06 18:43:06 -0800 (In reply to Saam Barati from comment #11) > (In reply to Yusuke Suzuki from comment #10) > > Committed r252157: <https://trac.webkit.org/changeset/252157> > > why roll out this code? At least we should make the code sensible instead of > updating a local variable which is never used See the ChangeLog of roll-out. > We should clean up to make this bug's behavior default. And we should look for a bit larger interval here 1588084 14 ysuzuki 2019-11-06 19:24:12 -0800 Reopening to attach new patch. 1588085 15 383012 ysuzuki 2019-11-06 19:24:13 -0800 Created attachment 383012 Patch 1588086 16 383013 ysuzuki 2019-11-06 19:25:30 -0800 Created attachment 383013 Patch 1588303 17 383013 saam 2019-11-07 11:11:16 -0800 Comment on attachment 383013 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=383013&action=review r=me > Source/bmalloc/bmalloc/Scavenger.cpp:-504 > - if (m_isInMiniMode) { > - timeSpentScavenging *= 50; > - newWaitTime = std::chrono::duration_cast<std::chrono::milliseconds>(timeSpentScavenging); > - newWaitTime = std::min(std::max(newWaitTime, std::chrono::milliseconds(25)), std::chrono::milliseconds(500)); > - } else { Can we file a FIXME? 1588518 18 ysuzuki 2019-11-07 17:29:14 -0800 Committed r252224: <https://trac.webkit.org/changeset/252224> 381232 2019-10-17 14:57:26 -0700 2019-11-06 19:24:11 -0800 PATCH bug-203121.diff 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