Hi Erik,

On 29/09/2016 1:01 AM, Erik Helin wrote:
Hi all,

this patch adds a new GC stress test called GCBasher. GCBasher builds up
large (well, for some definiton of large) object graphs by figuring out
the relations between classes in the JDK. The test usually stresses the
GC quite a lot, especially when run with a smaller heap.

The changes in the top-level repository are for JPRT. JPRT will now run
the jtreg test GCBasher instead of the old version.

Enhancement:
https://bugs.openjdk.java.net/browse/JDK-8166790

Webrev:
- hotspot: http://cr.openjdk.java.net/~ehelin/8166790/hotspot/00/

Can't comment on actual test but placement etc looks fine.

One query:

test/gc/stress/gcbasher/TestGCBasher.java

You are running with -server explicitly. Should you not also have @requires vm == server (or whatever the syntax is) as well?

- top: http://cr.openjdk.java.net/~ehelin/8166790/top/00/

Nit: The new end lines like:

 337     solaris_sparcv9_5.11-product-c2-runThese8,
 345     solaris_x64_5.11-product-c2-runThese8_Xcomp_vm,
 370     windows_i586_6.3-product-c2-runThese8_Xcomp_vm,
 378     windows_x64_6.3-product-c2-runThese8_Xcomp_vm,

should not have the trailing comma.

This seems wrong:

443 ${my.make.rule.test.targets.hotspot.reg.group:GROUP=hotspot_fast_gc_gcbasher}, \ 444 ${my.make.rule.test.targets.hotspot.reg.group:GROUP=hotspot_fast_runtime}, \ 445 ${my.make.rule.test.targets.hotspot.reg.group:GROUP=hotspot_fast_serviceability}, \ 446 ${my.make.rule.test.targets.hotspot.reg.group:GROUP=jdk_svc_sanity}, \ 447 solaris_sparcv9_5.11-product-c2-hotspot_fast_gc_gcbasher, \ 448 solaris_x64_5.11-product-c2-hotspot_fast_gc_gcbasher, \ 449 linux_i586_3.8-product-c2-hotspot_fast_gc_gcbasher, \ 450 linux_x64_3.8-product-c2-hotspot_fast_gc_gcbasher, \ 451 macosx_x64_10.9-product-c2-hotspot_fast_gc_gcbasher, \ 452 windows_i586_6.3-product-c2-hotspot_fast_gc_gcbasher, \ 453 windows_x64_6.3-product-c2-hotspot_fast_gc_gcbasher, \

You've added the new tests through a group substitution at line 443, but then have added each platform individually. I don't think 447 - 453 should be there else the test will run twice per platform.

Thanks,
David
-----

Testing:
- Running the new jtreg test locally on Linux x86-64:
  $ jtreg -jdk:build/fastdebug/jdk hotspot/test/gc/stress/TestGCBasher.java

  (can also be run via: $ make test TEST=hotspot_fast_gc_gcbasher)
- JPRT

Thanks,
Erik

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