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From "Ivan Volosyuk" <ivan.volos...@gmail.com>
Subject Re: [drlvm][gc]Allocation rate test
Date Sat, 28 Oct 2006 23:10:13 GMT
As I can see we are far behind stock java implementation. This can
change after fast path for object allocation gets implemented.
Looking at the data received from stack java, I see that it is only
limited by memory bandwidth so it will not scale when changing number
of CPUs.
--
Ivan

On 10/27/06, Rana Dasgupta <rdasgupt@gmail.com> wrote:
> Hi,
>   I ran a simple test that allocates and discards a large number of objects
> repeatedly on multiple threads. These should all be gen zero objects( none
> survive ) that are repeatedly collected. So the test is of effective
> allocation rate( I set heap size for all the gc's to 64M and 256 M ). I
> think the test emulates a web server repeatedly creating and discarding page
> level objects with each page invocation. This is NOT a perf comparison. gcv5
> is just getting created, and comparisons are meaningless. But we can use
> tests like this to tune. I am attaching the raw test output file.
>
>  I submitted the test and build mods to JIRA, issue 1993. I am not sure that
> we have decided where such focussed tuning tests that take too long to be
> acceptance tests and don't really pass or fail should live. For right now, I
> created a tests directory under gc_gen.
>
> Thanks,
> Rana

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