All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Sandeen <sandeen@sandeen.net>
To: Pedro Ribeiro <pedrib@gmail.com>
Cc: xfs@oss.sgi.com
Subject: Re: Tuning XFS for real time audio on a laptop with encrypted LVM
Date: Sat, 22 May 2010 08:22:05 -0500	[thread overview]
Message-ID: <4BF7DA7D.5070405@sandeen.net> (raw)
In-Reply-To: <AANLkTilJD2Jfr4W97BiAlyc_7C9jLEhEzuEWSDyVKXYP@mail.gmail.com>

Pedro Ribeiro wrote:
> Hi all,
> 
> I was wondering what is the best scheduler for my use case given my
> current hardware.
> 
> I have a laptop with a fast Core 2 duo at 2.26 and a nice amount of
> ram (4GB) which I use primarily for real time audio (though without a
> -rt kernel). All my partitions are XFS under LVM which itself is
> contained on a LUKS partition (encrypted with AES 128).
> 
> CFQ currently does not perform very well and causes a lot of thrashing
> and high latencies when I/O usage is high. Changing it to the noop
> scheduler solves some of the problems and makes it more responsive.
> Still performance is a bit of a let down: it takes 1m30s to unpack the
> linux-2.6.34 tarball and a massive 2m30s to rm -r.
> I have lazy-count=1, noatime, logbufs=8, logbsize=256k and a 128m log.

Are you optimizing for kernel untars, or "real time audio?"

I would expect that even suboptimal tuning would keep up just fine with
audio demands.

-Eric

> Is there any tunable I should mess with to solve this? And what do you
> think of my scheduler change (I haven't tested it that much to be
> honest)?
> 
> Regards,
> Pedro

_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs

  parent reply	other threads:[~2010-05-22 13:19 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-21  2:16 Tuning XFS for real time audio on a laptop with encrypted LVM Pedro Ribeiro
2010-05-21  4:14 ` Dave Chinner
2010-05-21  6:25   ` Stan Hoeppner
2010-05-21 11:29     ` Pedro Ribeiro
2010-05-21 13:45       ` Stan Hoeppner
2010-05-22 12:21         ` Pedro Ribeiro
2010-05-22 22:13           ` Stan Hoeppner
2010-05-22 13:22 ` Eric Sandeen [this message]
2010-05-22 13:54   ` Pedro Ribeiro

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4BF7DA7D.5070405@sandeen.net \
    --to=sandeen@sandeen.net \
    --cc=pedrib@gmail.com \
    --cc=xfs@oss.sgi.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.