Request for review (S): 8005489: VM hangs during GC with ParallelGC and ParallelGCThreads=0

Vitaly Davidovich vitalyd at gmail.com
Tue Jan 8 11:20:12 UTC 2013


Nice and simple - looks good Bengt.

Sent from my phone
On Jan 8, 2013 5:16 AM, "Bengt Rutisson" <bengt.rutisson at oracle.com> wrote:

>
> Hi all,
>
> Could I have a couple of reviews for this change. The parallel collector
> needs at least one GC worker thread to function properly . Setting
> ParallelGCThreads=0 on the command line causes the parallel collector to
> hang in product builds and assert in debug builds. This has been the case
> back to JDK6u14.
>
> The fix will instead print an error message and exit the VM if
> ParallelGCThreads=0 is used with UseParallelGC. This is similar to what we
> recently did for the ParNew collector.
>
> http://cr.openjdk.java.net/~**brutisso/8005489/webrev.00/<http://cr.openjdk.java.net/~brutisso/8005489/webrev.00/>
>
> Thanks,
> Bengt
>
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