linux-kernel - Re: [performance bug] kernel building regression on 64 LCPUs machine

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:	Thu, 20 Jan 2011 10:12:04 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Ted Ts'o <tytso@....edu>
Cc:	"Shi, Alex" <alex.shi@...el.com>,
	"czoccolo@...il.com" <czoccolo@...il.com>,
	"vgoyal@...hat.com" <vgoyal@...hat.com>,
	"jaxboe@...ionio.com" <jaxboe@...ionio.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Chen, Tim C" <tim.c.chen@...el.com>
Subject: Re: [performance bug] kernel building regression on 64 LCPUs
 machine

On Wed, 2011-01-19 at 22:32 +0800, Ted Ts'o wrote:
> On Wed, Jan 19, 2011 at 09:55:48AM +0800, Alex,Shi wrote:
> > Shaohua and I tested kernel building performance on latest kernel. and
> > found it is drop about 15% on our 64 LCPUs NHM-EX machine on ext4 file
> > system. 
> 
> What kerenl version were you comparing against?  And what were you
> using to benchmark this performance drop?  I'm curious what your
> workload was; I'm guesisng it was some kind of mixed read/write
> workload?  Were there any fsync()'s involved?
2.6.36 vs 2.6.37. this exists in 2.6.37-rc1. it's a kbuild, no a mixed
read/write workload. kbuild hasn't fsync involved

Thanks,
Shaohua


--
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/