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From: Damien Millescamps <damien.millescamps-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
To: dev-VfR2kkLFssw@public.gmane.org
Subject: Re: [PATCH 0/7] Vyatta patches
Date: Fri, 31 May 2013 11:29:09 +0200	[thread overview]
Message-ID: <51A86D65.2090003@6wind.com> (raw)
In-Reply-To: <20130530171234.301927271-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>

On 05/30/2013 07:12 PM, Stephen Hemminger wrote:
> One fix not included is the NUMA cpu assignment. The original Intel code
> in 1.2 incorrectly used /proc/cpuinfo to try and assign CPU's to NUMA socket.
> The problem is that /proc/cpuinfo physical_id corresponds to what the BIOS
> tells the kernel and is intended for messages only. For example, on our
> Dell boxes the first CPU and only CPU is reported as physical_id 1!
> The fix is to use sysfs instead,
Hi Stephen,

Are you using the
/sys/devices/system/node/nodeX/cpuX/topology/physical_package_id special
file ?

If so, then it is only usable starting from Kernel 3.3 according to this
fix:
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=64be4c1c2428e148de6081af235e2418e6a66dda

The value returned for kernel prior to 3.3 is really not better than the
one from /proc/cpuinfo, so that's kind of a robbing Peter to pay Paul
example...

There is obviously a problem with the NUMA node ID detection right now
since both /proc/cpuinfo and /sys can return incorrect values, however
the node and cpu numbering is always good in the kernel boot log from
what I know. So there might be a better way to find the real node ID
whatever the kernel version used.

Cheers,
-- 
Damien Millescamps

  parent reply	other threads:[~2013-05-31  9:29 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-30 17:12 [PATCH 0/7] Vyatta patches Stephen Hemminger
2013-05-30 17:12 ` [PATCH 1/7] [PATCH 4/8] igb: workaround errata with wthresh on 82576 Stephen Hemminger
     [not found]   ` <20130530171626.764056062-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-05 14:22     ` Vincent JARDIN
     [not found]       ` <51AF499B.8020903-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-12 10:06         ` [PATCH 1/7] " Thomas Monjalon
2013-05-30 17:12 ` [PATCH 2/7] rte_timer: optimize for empty case Stephen Hemminger
     [not found]   ` <20130530171626.825256039-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-05 14:25     ` Vincent JARDIN
     [not found]       ` <51AF4A42.4000005-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-12 10:07         ` Thomas Monjalon
2013-05-30 17:12 ` [PATCH 3/7] optimize log/panic Stephen Hemminger
     [not found]   ` <20130530171626.884622340-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-05 14:34     ` Vincent JARDIN
     [not found]       ` <51AF4C82.2010603-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-12 10:09         ` Thomas Monjalon
2013-05-30 17:12 ` [PATCH 4/7] eal: support different modules Stephen Hemminger
     [not found]   ` <20130530171626.948387515-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-03  8:58     ` Damien Millescamps
     [not found]       ` <51AC5A99.1050207-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-03 15:41         ` Stephen Hemminger
     [not found]           ` <20130603084154.70219c8f-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2013-06-03 16:36             ` Thomas Monjalon
     [not found]               ` <201306031836.52362.thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-03 17:26                 ` Stephen Hemminger
     [not found]                   ` <20130603102629.713d917c-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2013-06-04  9:17                     ` Damien Millescamps
2013-06-03 16:08         ` Antti Kantee
     [not found]           ` <51ACBF95.1030109-X3B1VOXEql0@public.gmane.org>
2013-06-03 16:29             ` Thomas Monjalon
     [not found]               ` <201306031829.02984.thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-03 17:25                 ` Stephen Hemminger
2013-06-03 18:40                 ` Antti Kantee
2013-05-30 17:12 ` [PATCH 5/7] pci: support multiple PCI regions per device Stephen Hemminger
     [not found]   ` <20130530171627.005239011-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-03 16:41     ` Thomas Monjalon
2013-06-05 14:50     ` Damien Millescamps
     [not found]       ` <51AF501B.5060306-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-05 15:49         ` Stephen Hemminger
     [not found]           ` <20130605084927.34f138c1-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2013-06-05 18:05             ` Damien Millescamps
     [not found]               ` <51AF7DDB.1070005-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-05 21:33                 ` Stephen Hemminger
     [not found]                   ` <20130605143337.76af91ff-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2013-06-18  1:28                     ` somnath kotur
     [not found]                       ` <CAMXF-eXYRFfSvA_RhHa6tz27_JaLnkAvDN=hBZYEJB=9xg3NrQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-16  8:53                         ` Thomas Monjalon
     [not found]                           ` <201307161053.19175.thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-07-19 16:44                             ` Stephen Hemminger
2013-05-30 17:12 ` [PATCH 6/7] igb_uio: pci_block_user_cfg_access is unsafe, remove it Stephen Hemminger
2013-05-30 17:12 ` [PATCH 7/7] eal: add ability to override DPDK syslog parameters Stephen Hemminger
     [not found]   ` <20130530171627.135792331-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-06-05 14:36     ` Vincent JARDIN
     [not found]       ` <51AF4CFF.80906-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-06-12 10:18         ` Thomas Monjalon
     [not found] ` <20130530171234.301927271-ZtmgI6mnKB3QT0dZR+AlfA@public.gmane.org>
2013-05-30 22:20   ` [PATCH 0/7] Vyatta patches Thomas Monjalon
2013-05-31  9:29   ` Damien Millescamps [this message]
     [not found]     ` <51A86D65.2090003-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-05-31 15:45       ` Stephen Hemminger
     [not found]         ` <20130531084529.5c63d4c0-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2013-05-31 16:44           ` Damien Millescamps
     [not found]             ` <51A8D353.50101-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2013-05-31 17:00               ` Stephen Hemminger
2013-06-03 15:22   ` Thomas Monjalon

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