From: Benjamin LaHaise <bcrl@redhat.com>
To: "Joseph N. Hall" <joseph@5sigma.com>
Cc: Matthew Dharm <mdharm-kernel@one-eyed-alien.net>,
linux-kernel@vger.kernel.org
Subject: Re: IDE-DVD problems [excuse former idiotic topic]
Date: Wed, 4 Sep 2002 11:49:45 -0400 [thread overview]
Message-ID: <20020904114945.C1394@redhat.com> (raw)
In-Reply-To: <200209041530.g84FUM124938@mx1.redhat.com>; from joseph@5sigma.com on Wed, Sep 04, 2002 at 08:48:00AM -0700
On Wed, Sep 04, 2002 at 08:48:00AM -0700, Joseph N. Hall wrote:
> * Performance is terrible
> * booting with noapic makes no difference
> * Performance seems to indicate some kind of difficulties in
> the kernel, perhaps connected to interrupt handling
That's what happens when DMA isn't being used: the kernel spends lots of
time copying data from the drive in the interrupt handler and not allowing
userspace to execute.
-ben
next parent reply other threads:[~2002-09-04 15:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200209041530.g84FUM124938@mx1.redhat.com>
2002-09-04 15:49 ` Benjamin LaHaise [this message]
2002-09-04 17:54 IDE-DVD problems [excuse former idiotic topic] Joseph N. Hall
[not found] <200209041553.g84Frl130632@mx1.redhat.com>
2002-09-04 17:44 ` Benjamin LaHaise
-- strict thread matches above, loose matches on Subject: below --
2002-09-04 16:11 Joseph N. Hall
2002-09-04 15:48 Joseph N. Hall
[not found] <200209040542.g845gf100948@mx1.redhat.com>
2002-09-04 14:55 ` Benjamin LaHaise
2002-09-04 6:00 Joseph N. Hall
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