linux-kernel - Re: getting processor numbers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 4 Apr 2007 00:02:05 -0700
From:	Paul Jackson <pj@....com>
To:	Jakub Jelinek <jakub@...hat.com>
Cc:	akpm@...ux-foundation.org, drepper@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: getting processor numbers

Jakub wrote:
> OpenMP wants (4) and I'll change it that way.

Good.  Are you referring to a change in glibc or in OpenMP?

> sysconf(_SC_NPROCESSORS_ONLN) must return (3) (this currently scans /proc/stat)

Ok

> sysconf(_SC_NPROCESSORS_CONF) should IMHO return (2) (this currently
> scans /proc/cpuinfo on alpha and sparc{,64} for ((ncpus|CPUs) probed|cpus detected)
> and for the rest just returns sysconf(_SC_NPROCESSORS_ONLN)).

Not quite what I would have guessed, but seems ok.

Thanks for spelling this out.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/