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]

Message-ID: <20110119143214.GA3043@thunk.org>
Date:	Wed, 19 Jan 2011 09:32:14 -0500
From:	Ted Ts'o <tytso@....edu>
To:	"Alex,Shi" <alex.shi@...el.com>
Cc:	czoccolo@...il.com, vgoyal@...hat.com, jaxboe@...ionio.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Li, Shaohua" <shaohua.li@...el.com>,
	"Chen, Tim C" <tim.c.chen@...el.com>
Subject: Re: [performance bug] kernel building regression on 64 LCPUs
 machine

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?

Thanks, regards,

						- Ted
--
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/