Bug 181227 - [MIPS] JSC test failure: stress/new-largeish-contiguous-array-with-size.js
Summary: [MIPS] JSC test failure: stress/new-largeish-contiguous-array-with-size.js
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-01-02 16:13 PST by Guillaume Emont
Modified: 2018-03-06 01:42 PST (History)
2 users (show)

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Description Guillaume Emont 2018-01-02 16:13:30 PST
This failure happens about every 2-3 runs on the MIPS buildbot. We see:

  stress/new-largeish-contiguous-array-with-size.js.ram-size-10000000: Exception: Error: heap too big after forced GC: 1368418

Locally, I can reproduce and get a different value:

  # i=1; while jsc --forceRAMSize=10000000 JSTests/stress/new-largeish-contiguous-array-with-size.js ; do echo $i; i=$((i+1)); done
  1
  2
  Exception: Error: heap too big after forced GC: 1355035
Comment 1 Guillaume Emont 2018-01-02 16:15:09 PST
It is unclear to me whether this is a sign of a bug or that the test needs to check against a higher maximum.
Comment 2 Guillaume Emont 2018-01-02 16:51:31 PST
It looks like on different runs, I get one of the following progression of heap sizes:
 - 3359463 before GC and 158823 after GC
 - 3359495 before GC and 158855 after GC
 - 2159159 before GC and 558839 after GC
 - 1759047 before GC and 958887 after GC
 - 2559143 before GC and 1358903 after GC (failing the test)

For some of them, I get slight variations with the last 2 digits being different.