RFR: 8252368 : Undo JDK-8245002: Windows GDI functions don't support NUMA interleaving
stefan.karlsson at oracle.com
Mon Aug 31 08:55:09 UTC 2020
On 2020-08-31 10:52, stefan.johansson at oracle.com wrote:
> Hi StefanK,
> Looks good,
> On 2020-08-26 13:53, Stefan Karlsson wrote:
>> Hi all,
>> Please review this patch to re-enable NUMA interleaving on Windows.
>> In JDK 15 we put in code that turns off NUMA interleaving if it is
>> detected that Windows GDI functions don't work with split memory
>> reservations. Later in JDK 16, and JDK 15.0.1, the code that uses GDI
>> was rewritten to have a fallback mechanism for these kinds of
>> problems (JDK-8240654). Because of that we don't need the workaround
>> to turn off NUMA interleaving anymore.
>> We also pushed a similar workaround patch to turn off large pages
>> (JDK-8245000). That is dealt with in a separate RFR (JDK-8252367).
>> This patch builds upon the changes in JDK-8252367.
>> I tested locally that the reproducer in JDK-8245000 doesn't reproduce
>> with the proposed patch. I also tested that also reverting the patch
>> in JDK-8240654 causes reproducer to reproduce again.
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