Request for reviews: 7188176: The JVM should differentiate between T and M series and adjust GC ergonomics
tao.mao at oracle.com
Fri Sep 21 15:47:14 PDT 2012
As commented in the code
! // for now, use same gc thread calculation for M-series as for niagara-plus
! // in future, we may want to tweak parameters for nof_parallel_worker_thread
after discussion with Vladimir and Jon, we should treat them separately
b/c they are QUITE different types and will tune gc threads differently
for the two machines in future.
But, yes, they are using same parameters for now since we are awaiting
performance feedback from customers or performance team.
On 9/21/2012 3:32 PM, Vitaly Davidovich wrote:
> Hi Tao,
> Why not combine M series and niagara_plus into the same if block (i.e.
> if (niagara_plus || m_series)) since they use same parameters for
> calculating the parallel workers number?
> Sent from my phone
> On Sep 21, 2012 6:22 PM, "Tao Mao" <tao.mao at oracle.com
> <mailto:tao.mao at oracle.com>> wrote:
> 7188176: The JVM should differentiate between T and M series and
> adjust GC ergonomics
> The code has been tested on real M-series machine. In the testing,
> it was able to recognize the M-series machine and do the correct
> calculation of GCThreads.
> Tao Mao
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