From: "Paa Paa" <paapaa125@hotmail.com>
To: nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org
Subject: Re: Lower HD transfer rate with NCQ enabled?
Date: Tue, 03 Apr 2007 21:31:04 +0000 [thread overview]
Message-ID: <BAY20-F2534ADD292CC02D5ACAFBCF9670@phx.gbl> (raw)
In-Reply-To: <46121BCF.50401@yahoo.com.au>
>>Q: What conclusion can I make on "hdparm -t" results or can I make any
>>conclusions? Do I really have lower performance with NCQ or not? If I do,
>>is this because of my HD or because of kernel?
>
>What IO scheduler are you using? If AS or CFQ, could you try with deadline?
I was using CFQ. I now tried with Deadline and that doesn't seem to degrade
the performance at all! With Deadline I got 60MB/s both with and without
NCQ. This was with "hdparm -t".
So what does this tell us?
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next prev parent reply other threads:[~2007-04-03 21:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-03 7:11 Paa Paa
2007-04-03 9:18 ` Nick Piggin
2007-04-03 21:31 ` Paa Paa [this message]
2007-04-04 2:06 ` Nick Piggin
2007-04-06 21:33 ` Bill Davidsen
2007-04-03 16:31 ` Chris Snook
2007-04-03 16:47 ` Mark Lord
2007-04-03 19:17 ` Phillip Susi
2007-04-04 15:36 ` Mark Lord
2007-04-05 15:30 ` Phillip Susi
2007-04-05 16:11 ` Mark Lord
2007-04-05 16:45 ` Lennart Sorensen
2007-04-09 14:46 ` Phillip Susi
2007-04-10 3:58 ` Mark Lord
2007-04-05 16:26 Paa Paa
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