linux-kernel - Re: volanoMark regression with kernel 2.6.26-rc1

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]

Message-ID: <20080512045246.GP3612@linux.vnet.ibm.com>
Date:	Mon, 12 May 2008 10:22:46 +0530
From:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Aneesh Kumar KV <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: volanoMark regression with kernel 2.6.26-rc1

On Mon, May 12, 2008 at 11:33:20AM +0800, Zhang, Yanmin wrote:
> To make the testing faster, I changed some parameters of volanoMark.
> The result of 2.6.26-rc1(CONFIG_CGROUP_SCHED=y) is about 2%~3% less than the one of
> 2.6.25 (CONFIG_USER_SCHED=y).

This for confirming my observation. It seems much better than the 50% regression
reported earlier (with 2.6.26-rc1 and CONFIG_USER_SCHED).

Ideally we should get same results with CONFIG_USER_SCHED also (in
2.6.26-rc1). That needs some work in load balance code. Till that is
tackled, IMHO we can retain all the current code by either:

1. Disabling CONFIG_GROUP_SCHED (or better)
2. Enable CONFIG_GROUP_SCHED and CONFIG_CGROUP_SCHED

Ingo/Peter, What's your opinion?

-- 
Regards,
vatsa
--
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/