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  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:	Tue, 10 Nov 2009 19:37:30 +0100
From:	Jan Kara <>
To:	Jeff Moyer <>
Cc:	Corrado Zoccolo <>, Jan Kara <>,, LKML <>,
	Chris Mason <>,
	Andrew Morton <>,
	Mike Galbraith <>
Subject: Re: Performance regression in IO scheduler still there

On Fri 06-11-09 09:14:53, Jeff Moyer wrote:
> Corrado Zoccolo <> writes:
> > Hi Jeff,
> > what hardware are you using for tests?
> > I see aggregated random read bandwidth is larger than sequential read
> > bandwidth, and write bandwidth greater than read.
> > Is this a SAN with multiple independent spindles?
> Yeah, this is a single path to an HP EVA storage array.  There are 24 or
> so disks striped in the pool used to create the volume I am using.  Jan,
> could you repeat your tests with /sys/block/sdX/queue/iosched/low_latency
> set to 0?
  I'll give it a spin tomorrow...

Jan Kara <>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists