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Re: Counting of cores


From: Joe Sapp
Subject: Re: Counting of cores
Date: Fri, 30 Nov 2018 09:23:43 -0500

On Thu, Nov 29, 2018 at 1:32 PM Ole Tange <address@hidden> wrote:
>
> On Thu, Nov 29, 2018 at 2:08 AM Joe Sapp <address@hidden> wrote:
>
> > It seems like the number of physical compute cores counted by Parallel
> > is less than other tools (e.g., lscpu) by a factor of the number of
> > sockets, but I haven't tested it on many architectures.
>
> It seems you are right. Can I ask you to post output from
> /proc/cpuinfo from machines you have access to? I will then put that
> into the testsuite.

See attached /proc/cpuinfo.  It appears to have 48 processors thanks
to hyperthreading, but that is correctly counted by Parallel as the
number of threads.  There are 2 sockets and 12 compute cores per
socket, but Parallel only counts 12 cores.

Thanks,
Joe

Attachment: cpuinfo
Description: Binary data


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