RFR: 8148987: [Linux] Allow building on older systems without CPU_ALLOC support

Dmitry Samersoff dmitry.samersoff at oracle.com
Fri Feb 5 10:46:01 UTC 2016


I suspect that if the os don't have CPU_COUNT it doesn't have
CPU_COUNT_S as well at 4851

Is it possible to create two different version of
os::active_processor_count() - simple one for old systems and more
complicated one for modern linux and move define to a function level?


On 2016-02-05 10:50, David Holmes wrote:
> bug: https://bugs.openjdk.java.net/browse/JDK-8148987
> webrev: http://cr.openjdk.java.net/~dholmes/8148987/webrev/
> This is a tentative RFR as I'm not yet convinced we should support
> building on these older platforms in JDK 9. Opinions welcome on that point.
> The older systems do not have dynamic cpu set support (CPU_ALLOC) nor do
> they have the CPU_COUNT utility macro.
> Thanks,
> David

Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.

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