Huge pages

[Volker Simonis]

On Wed, Apr 10, 2013 at 5:09 PM, Tiago Stürmer Daitx <
tdaitx at linux.vnet.ibm.com> wrote:

> > unfortunately I'm unable to reproduce the problem you reported (i.e.
> > the (errno = 16) warning).
> >
> > java -XX:+UseConcMarkSweepGC -XX:+UseLargePages -XX:+UseSHM -Xmx756m
> > -showversion -jar SPECjvm2008.jar -wt 120 -it 300 --parseJvmArgs -i 1
> > --peak
>
> I figured out why I was unable to reproduce your successful run with
> compressedoops on. I was calling specjvm2008 with a properties file and
> there was an uncommented line at the middle of it that overwriting the
> heap setting with -Xmx2048.
>
> The threshold for the heap is 1984, at 1985 shmat starts failing with
> EBUSY. Of course, that's when CompressedOops is enabled.
>
>
I think that may be because you don't have enough continuous huge space
memory (see my previous mail). I can't allocate to the actual limit of
HugePages_Total*Hugepagesize either.


> --
> Tiago Stürmer Daitx
> tdaitx at linux.vnet.ibm.com
> IBM - Linux Technology Center
>
>
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