Message-ID: <44DA2528.5010905@sgi.com>
Date: Wed, 09 Aug 2006 20:10:48 +0200
From: Jes Sorensen <jes@sgi.com>
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To: "Luck, Tony" <tony.luck@intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: How to lock current->signal->tty
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Luck, Tony wrote:
> On Wed, Aug 09, 2006 at 11:44:10AM +0100, Alan Cox wrote:
>> Jes, read up on kprobes a little if you think its of no use in these
>> kind of situations. A systemtap script to count/measure alignment fault
>> rates and see who is causing the load isn't very hard to write.
> 
> But this does make sense ... the system administrator of a mainframe or
> super-computer can (and arguably should) be monitoring resource
> utilization and providing feedback to users on how to get the best
> performance from their applications.

Actually perfmon would probably be better suited for this on ia64 than
kprobes/systemtap. You can do it on hackish way with a [jk]probe, but it
isn't going to be all that pretty.

> -Tony (currently at 90% rip out this message, 10% add the mutex lock/unlock).

Nuke it!

Jes
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