From: Hamie <hamish@travellingkiwi.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: ide-cs using 100% CPU
Date: Sun, 08 Aug 2004 10:03:40 +0100 [thread overview]
Message-ID: <4115EC6C.5040608@travellingkiwi.com> (raw)
In-Reply-To: <1091917597.19077.38.camel@localhost.localdomain>
Alan Cox wrote:
>On Gwe, 2004-08-06 at 20:33, Hamie wrote:
>
>
>>Is 100% CPU not excessive? IIRC my PIII-750 used to use less CPU doing
>>the same job as quick, or even slightly faster...
>>
>>
>
>PCMCIA IDE is PIO only so it burns CPU. This is one case where
>hyperthreading is nice. Cardbus IDE is a lot better but very little
>exists and we don't currently support hotplug IDE controllers.
>
>
>
Ah right. But would a CF memory card be cardbus anyway?
>>And should it not use system CPU rather than user CPU?
>>
>>
>
>Yes - but figure out please if the kernel or userspace is getting that
>wrong ;)
>
>
>
My apologies. It was gkrellm leading me up the garden path on that
one... Copying about 100MB from a 512MB CF card (25+ photos from my
camera) vmstat 5 reports 4% usercpu, 96% system cpu. And the response on
the system is sluggish to say the least. (Moving the pointer in X is
painful :). gkrell meanwhile on it's cpu graph shows about 30% system,
and the rest as userCPU. No idea why, I guess till I find out I'll just
regard gkrellm's cpu graph as a waste of space (To differentiate system
& user cpu anyway :).
>
>
next prev parent reply other threads:[~2004-08-08 9:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-18 9:30 ide-cs using 100% CPU Hamie
2004-08-06 19:27 ` Russell King
2004-08-06 19:33 ` Hamie
2004-08-06 19:38 ` Russell King
2004-08-07 17:55 ` Hamie
2004-08-07 22:26 ` Alan Cox
2004-08-08 9:03 ` Hamie [this message]
2004-08-08 15:24 ` Alan Cox
2004-08-09 9:57 ` Paulo Marques
2004-08-09 12:32 ` P
2004-08-09 20:11 ` Bill Davidsen
[not found] <fa.j0leddb.okcbor@ifi.uio.no>
[not found] ` <fa.goasld9.1q1kb05@ifi.uio.no>
2004-08-07 19:21 ` Robert Hancock
2004-08-08 15:24 ` Hamie
[not found] <fa.hhjr2f2.1ql2t80@ifi.uio.no>
[not found] ` <fa.ggacpdl.26on0d@ifi.uio.no>
2004-08-08 19:32 ` Robert Hancock
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