Fwd: Re: Request for Review (s) - 8133023: ParallelGCThreads is not calculated correctly
david.holmes at oracle.com
Thu Nov 26 02:11:46 UTC 2015
We already have VM_Version::early_initialize() that can/should be used
for this if possible.
On 26/11/2015 8:50 AM, Jon Masamitsu wrote:
> Widening the review request. This fixed changed the order
> of some VM initialization for solaris-sparc with hopefully
> the minimum change for other platforms.
> -------- Forwarded Message --------
> Subject: Re: Request for Review (s) - 8133023: ParallelGCThreads is
> not calculated correctly
> Date: Wed, 25 Nov 2015 14:10:36 -0800
> From: Jon Masamitsu <jon.masamitsu at oracle.com>
> Organization: Oracle Corporation
> To: hotspot-gc-dev at openjdk.java.net
> I have a new fix for this bug. My previous fix broke solaris-x86 (I
> had not defined an early_initialize() for x86). This fix is slightly
> smaller and has the virtue of moving the required initialization
> closer to where it is used.
> Testing: JPRT build on all platforms, checked by hand that the correct
> of GC worker threads are created on later Niagara platforms.
> On 11/12/2015 1:31 PM, Jon Masamitsu wrote:
>> GC calls VM_Version::calc_parallel_worker_threads() to determine
>> the number of GC threads to create. On Sparc it checks for newer
>> Niagara hardware to decide the proper scaling of the GC threads with
>> the hardware threads. calc_parallel_worker_threads() was being called
>> before enough information was gathered to determine the Sparc hardware.
>> Moved the gathering of information needed to earlier in the JVM
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