From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: xp newbie <xp_newbie@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: irqpoll kernel option hurts performance?
Date: Fri, 03 Nov 2006 11:52:04 +0000 [thread overview]
Message-ID: <1162554724.12810.3.camel@localhost.localdomain> (raw)
In-Reply-To: <20061103053737.78243.qmail@web38407.mail.mud.yahoo.com>
Ar Iau, 2006-11-02 am 21:37 -0800, ysgrifennodd xp newbie:
> specified the "irqpoll" option to boot the installation CD, is the
> system doomed to always work in "IRQ polling mode" (which is much more
> CPU wasteful if I understand this correctly)? Am I really using my
> hardware now in less than optimal manner (like in PIO vs. DMA, for
> example)?
irqpoll has a small impact, how big depends what the box does (on a
gigabit network firewall its bad news, on a typical desktop its not
measurable).
IRQ problems of the form you report can arise from a couple of places -
one is vendors getting IRQ routing tables wrong (suprisingly common),
the other may be a Linux bug.
Checking for a BIOS update may therefore be useful.
Is this a VIA chipset machine ?
Alan
next prev parent reply other threads:[~2006-11-03 11:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-03 5:37 irqpoll kernel option hurts performance? xp newbie
2006-11-03 11:52 ` Alan Cox [this message]
2006-11-03 15:10 ` xp newbie
2006-11-03 16:00 ` Alan Cox
2006-11-03 18:55 ` xp newbie
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