172373 2017-05-19 11:58:51 -0700 bmalloc: scavenger runs too much on JetStream 2018-04-17 04:02:06 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=184684 InRadar P2 Normal --- 1 ggaren ggaren benjamin buildbot fpizlo kling msaboff saam sam webkit-bug-importer oldest_to_newest 1310696 0 ggaren 2017-05-19 11:58:51 -0700 bmalloc: scavenger runs too much on JetStream 1310720 1 310685 ggaren 2017-05-19 12:48:41 -0700 Created attachment 310685 Patch 1310722 2 buildbot 2017-05-19 12:50:53 -0700 Attachment 310685 did not pass style-queue: ERROR: Source/bmalloc/bmalloc/AsyncTask.h:129: More than one command on the same line [whitespace/newline] [4] Total errors found: 1 in 7 files If any of these errors are false positives, please file a bug against check-webkit-style. 1310740 3 310685 sam 2017-05-19 13:20:20 -0700 Comment on attachment 310685 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=310685&action=review > Source/bmalloc/ChangeLog:28 > + One hole in this strategy is that a workload with a perfectly > + unfragmented heap that allocates and deallocates ~16kB every 2s will > + never shrink its heap. This doesn't seem to be a problem in practice. Presumably, once it reaches critical memory pressure, it will still shrink? 1310775 4 ggaren 2017-05-19 14:40:07 -0700 > Presumably, once it reaches critical memory pressure, it will still shrink? Yes. 1312927 5 311304 msaboff 2017-05-25 15:36:51 -0700 Created attachment 311304 Updated Patch Tested this on iOS. Working with Geoff, we made a few changes. 1312928 6 buildbot 2017-05-25 15:39:20 -0700 Attachment 311304 did not pass style-queue: ERROR: Source/bmalloc/bmalloc/AsyncTask.h:129: More than one command on the same line [whitespace/newline] [4] ERROR: Source/bmalloc/bmalloc/Heap.cpp:204: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/bmalloc/bmalloc/Heap.cpp:209: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/bmalloc/bmalloc/Heap.cpp:212: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/bmalloc/bmalloc/Heap.cpp:223: Multi line control clauses should use braces. [whitespace/braces] [4] Total errors found: 5 in 7 files If any of these errors are false positives, please file a bug against check-webkit-style. 1312930 7 311304 ggaren 2017-05-25 15:42:10 -0700 Comment on attachment 311304 Updated Patch r=me 1312941 8 msaboff 2017-05-25 16:11:26 -0700 Committed r217456: <http://trac.webkit.org/changeset/217456> 1314064 9 webkit-bug-importer 2017-05-30 20:27:02 -0700 <rdar://problem/32479828> 1319259 10 saam 2017-06-14 11:40:06 -0700 It looks like this or https://bugs.webkit.org/show_bug.cgi?id=172617 is a 1.5% slowdown on JetStream on iOS. 1322496 11 kling 2017-06-23 16:33:15 -0700 Note that if the vm.madvise_free_debug sysctl is 1, madvise(MADV_FREE_*) will synchronously zero-fill the pages. 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