netdev - Re: Network latency regressions from 2.6.22 to 2.6.29 (results with IRQ affinity)

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, 17 Apr 2009 12:42:40 -0400 (EDT)
From:	Christoph Lameter <cl@...ux.com>
To:	David Miller <davem@...emloft.net>
cc:	dada1@...mosbay.com, Michael Chan <mchan@...adcom.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	netdev@...r.kernel.org
Subject: Re: Network latency regressions from 2.6.22 to 2.6.29 (results with
 IRQ affinity)

On Thu, 16 Apr 2009, David Miller wrote:

> We really need to find a good way to fix that IRQ affinity issue.

Here are the results with setting interrupt affinity. We are still loosing
5 usecs from .22 to .30-rc2. We will investigate more in depth time
permitting.

	UDP ping pong 40 bytes

Kernel		Test 1	Test 2	Test 3	Test 4	Avg
2.6.22		83.1125	83.4	83.03	82.95	83.07
2.6.23		83.33	83.51	83.18	83.42	83.21
2.6.24		82.7775	82.8	82.77	82.77	82.77
2.6.25		85.875	85.94	85.75	86.06	85.75
2.6.26		87.4025	87.53	87.25	87.3	87.53
2.6.27		87.81	87.81	87.77	87.82	87.84
2.6.28		87.4275	87.77	87.24	87.28	87.42
2.6.29		88.4325	88.48	88.42	88.44	88.39
2.6.30-rc2	88.4925	88.49	88.44	88.56	88.48
--
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