netdev - Re: tg3 bad performance, lots of hardware interrupts

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Message-ID: <Pine.LNX.4.64.0803281811420.32241@twin.jikos.cz>
Date:	Fri, 28 Mar 2008 18:12:22 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Michael Chan <mchan@...adcom.com>
cc:	Harald Hannelius <harald@....fi>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>
Subject: Re: tg3 bad performance, lots of hardware interrupts

On Fri, 28 Mar 2008, Michael Chan wrote:

> > Phew, I thought that running ethtool -t was like doing stop-A-sync on 
> > a Sun. It took almost half an hour to run that ethtool -t command;
> Something is very wrong.  ethtool -t should only take a few seconds to
> complete.  You can try ethtool -t eth0 online to reduce the number of
> tests to see if it makes a difference.
> How many of these NICs do you have?  If you have more than one, do they
> all behave the same way?  Have they ever worked well before?

Harald, is the IRQ of eth0 shared with any other device? (cat 
/proc/interrupts will show).

-- 
Jiri Kosina
SUSE Labs

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