Date: Fri, 9 Mar 2012 16:30:05 -0500 (EST) From: Garrett Wollman <wollman@csail.mit.edu> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/165893: processor topology should be exported in more obvious format Message-ID: <201203092130.q29LU52n043520@zfsnfs.csail.mit.edu> Resent-Message-ID: <201203092140.q29Le6FM047597@freefall.freebsd.org>
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>Number: 165893
>Category: kern
>Synopsis: processor topology should be exported in more obvious format
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Mar 09 21:40:06 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Garrett Wollman
>Release: FreeBSD 9.0-RELEASE amd64
>Organization:
MIT Computer Science & Artificial Intelligence Lab
>Environment:
System: FreeBSD zfsnfs.csail.mit.edu 9.0-RELEASE FreeBSD 9.0-RELEASE #3 r232145M: Sun Feb 26 20:00:10 EST 2012 wollman@zfsnfs.csail.mit.edu:/usr/obj/usr/src/sys/ZFSNFS amd64
>Description:
Currently, the sysctl variable hw.ncpu gives the number of logical
processors. kern.sched.topology_spec gives a hard-to-parse XML
description of the system topology (is this ULE-only or 4BSD as
well?). Grepping /var/run/dmesg.boot will tell you the number of
sockets, cores, and threads without having to parse XML. It would be
preferable if these values were reflected in sysctl variables (in,
take your pick, the kern.sched, hw, machdep, or dev.cpu tree) so
programs don't have to parse XML or depend on being able to read
dmesg.boot.
>How-To-Repeat:
>Fix:
Sprinkle some SYSCTL_RDINT() macros into ${ARCH}/mp_machdep.c.
>Release-Note:
>Audit-Trail:
>Unformatted:
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