netdev - Re: Receive side performance issue with multi-10-GigE and NUMA

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:	Fri, 07 Aug 2009 23:53:18 +0200
From:	Brice Goglin <Brice.Goglin@...ia.fr>
To:	Bill Fink <billfink@...dspring.com>
CC:	Linux Network Developers <netdev@...r.kernel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>, gallatin@...i.com
Subject: Re: Receive side performance issue with multi-10-GigE and NUMA

Bill Fink wrote:
>> I've seen some cases in the past where numa_node was always 0 on
>> quad-Opteron machines with a PCI bus on node 1. IIRC it got fixed in
>> later kernels thanks to patches from Yinghai Lu (CC'ed).
>>     
>
> By later kernels do you mean 2.6.30 or 2.6.31?
>   

No, I meant "later than when the problem occured". I was using 2.6.22 at
this point and the problem was fixed somewhere around 2.6.25.

>> Is the corresponding local_cpus sysfs file wrong as well ?
>>     
>
> All sysfs local_cpus values are the same (00000000,000000ff),
> so yes they are also wrong.
>   

And hyperthreading is enabled, right?

Brice

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html