From: "John Madden" <jmadden@ivytech.edu>
Cc: mingz@ele.uri.edu, Linux RAID <linux-raid@vger.kernel.org>,
Tyler <pml@dtbb.net>
Subject: Re: raid0 low performance
Date: Thu, 30 Jun 2005 21:57:40 -0500 (EST) [thread overview]
Message-ID: <50513.168.91.5.7.1120186660.squirrel@localhost> (raw)
In-Reply-To: <42C4AA31.8040307@dtbb.net>
> useage during the tests? even PCI 32bit, 33mhz should be able to hit
> 133 Mbytes per second I believe. What are you writing *from* ? dev/zero
~127MB/s is the theoretical bus speed of PCI/33. Actual throughput is much less
than that, of course.
But you're not on a 33MHz bus, you should be at at least 66MHz (and info in /proc
should tell you). Given the lack of performance increase though, I'm guessing
you're either pegging the bus or the CPU, not yet the throughput of the kernel
itself. Does the program block in disk wait when running?
John
(Go Rams)
--
John Madden
UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@ivytech.edu
next prev parent reply other threads:[~2005-07-01 2:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-01 2:15 raid0 low performance Ming Zhang
2005-07-01 2:28 ` Tyler
2005-07-01 2:57 ` John Madden [this message]
2005-07-01 12:41 ` Ming Zhang
2005-07-01 12:54 ` John Madden
2005-07-01 13:10 ` Ming Zhang
2005-07-01 12:32 ` Ming Zhang
2005-07-01 12:55 ` Guy
2005-07-01 13:17 ` Ming Zhang
2005-07-01 13:54 ` Ming Zhang
2005-07-05 0:13 ` Mark Hahn
2005-07-05 0:26 ` Ming Zhang
2005-07-05 13:19 ` Ming Zhang
2005-07-01 14:42 ` Ming Zhang
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=50513.168.91.5.7.1120186660.squirrel@localhost \
--to=jmadden@ivytech.edu \
--cc=linux-raid@vger.kernel.org \
--cc=mingz@ele.uri.edu \
--cc=pml@dtbb.net \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).