Hi Dennis,
yes, it looks like it could be the spin issue.
But for sure it should be checked on original configuration, where you
observed the issue.
If it will not help - please try my original guess with
"executePendingIOUsingSelectorThread" property.
Thanks.
WBR,
Alexey.
On Dec 18, 2009, at 17:22 , ddooley wrote:
>
> Hi Alexey,
>
> After treating HP-UX like Linux in the test for isLinux in
> Controller.java
> (in the 1.9.19 snapshot code base), our QA engineer ran a test that
> made a
> total of 85 requests from 10 different threads (monitored by the
> profiler).
>
> This resulted in 12146 calls to getSpinRate(), 69 calls to
> resetSpinCounter(), and 20 calls to workaroundSelectorSpin() over
> the course
> of 55 seconds.
>
> Based on the result, in your opinion, would this classify as the Linux
> selector spin issue? Or would this be considered normal?
> Unfortunately for
> us, we don't have another system to run the test on. Our
> application only
> runs on the HP-UX system.
>
> If there is any more detail you would like, please let me know.
> This test
> was run on a system that does not exhibit the CPU spikes that
> prompted the
> original posting. We are setting up another test on a system that
> is more
> like the client experiencing the CPU spikes to see if the results
> are any
> different.
>
> Thanks for your help. I really appreciate it.
>
> --Dennis
>
>
> Oleksiy Stashok wrote:
>>
>> Hi Dennis,
>>
>>> the System.getProperty("os.name") is "HP-UX". Our contact at HP
>>> states that
>>> the selector spin test that fails (see link below) is a sun bug, and
>>> will be
>>> fixed in 1.7 which makes me believe all the more the issues are
>>> related. I
>>> wonder if HP-UX and Linux share the same sun code base?
>>>
>>> Just for fun, I have modified the grizzly Controller class to treat
>>> "HP-UX"
>>> the same as "linux" and we will be running some tests. I'll let you
>>> know
>>> the results.
>> Great, it should be my next suggestion :)))
>> Please let me know the result.
>>
>> WBR,
>> Alexey.
>>
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