From: Arjan van de Ven <arjan@infradead.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Greg KH <greg@kroah.com>, Andi Kleen <andi@firstfloor.org>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Steven Rostedt <rostedt@goodmis.org>,
Jon Masters <jonathan@jonmasters.org>,
Sven Dietrich <sdietrich@suse.de>
Subject: Re: [RFC patch 0/5] genirq: add infrastructure for threaded interrupt handlers
Date: Thu, 2 Oct 2008 20:48:51 -0700 [thread overview]
Message-ID: <20081002204851.1836e465@infradead.org> (raw)
In-Reply-To: <20081003032504.GF8318@one.firstfloor.org>
On Fri, 3 Oct 2008 05:25:04 +0200
Andi Kleen <andi@firstfloor.org> wrote:
> >
> > one of the things irq threads gives you is that 'top' will show you
> > which ones are eating cpu ;-)
>
> oprofile does that job fine already and is imho any time preferable
> for detailed analysis.
while I don't disagree that oprofile will give you more detailed
results, I think there's a HUGE difference between asking a bugreporter
"can you paste a screen of 'top'" and "can you configure and run
oprofile".
CHances are good that the user already thought of top him/herself and
just reports "interrupt X is eating CPU" rather than "something seems
to be eating CPU".
I'm not going argue that this alone is enough justification for
irqthreads, but you can't deny it's an advantage.
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2008-10-03 3:49 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-01 23:02 Thomas Gleixner
2008-10-01 23:02 ` [RFC patch 1/5] genirq: make irqreturn_t an enum Thomas Gleixner
2008-10-01 23:02 ` [RFC patch 2/5] genirq: add a quick check handler Thomas Gleixner
2008-10-02 0:47 ` Jon Masters
2008-10-02 5:09 ` Steven Rostedt
2008-10-02 10:51 ` Jon Masters
2008-10-02 22:06 ` Greg KH
2008-10-02 4:52 ` Steven Rostedt
2008-10-03 8:29 ` Christoph Hellwig
2008-10-03 10:37 ` Thomas Gleixner
2008-10-01 23:02 ` [RFC patch 3/5] genirq: add threaded interrupt handler support Thomas Gleixner
2008-10-02 5:01 ` Steven Rostedt
2008-10-01 23:02 ` [RFC patch 4/5] genirq: add a helper to check whether the irq thread should run Thomas Gleixner
2008-10-01 23:02 ` [RFC patch 5/5] genirq: make irq threading robust Thomas Gleixner
2008-10-02 0:52 ` Jon Masters
2008-10-02 5:20 ` Steven Rostedt
2008-10-01 23:23 ` [RFC patch 0/5] genirq: add infrastructure for threaded interrupt handlers Andrew Morton
2008-10-01 23:29 ` Arjan van de Ven
2008-10-01 23:40 ` Andrew Morton
2008-10-01 23:58 ` Thomas Gleixner
2008-10-02 0:40 ` Jon Masters
2008-10-02 22:07 ` Greg KH
2008-10-08 22:18 ` Ingo Oeser
2008-10-02 1:53 ` Daniel Walker
2008-10-02 15:02 ` Steven Rostedt
2008-10-02 15:48 ` Daniel Walker
2008-10-02 18:42 ` Thomas Gleixner
2008-10-02 19:04 ` Daniel Walker
2008-10-02 19:23 ` Steven Rostedt
2008-10-02 19:28 ` Ingo Molnar
2008-10-02 20:09 ` Daniel Walker
2008-10-02 20:14 ` Steven Rostedt
2008-10-02 20:48 ` Daniel Walker
2008-10-02 21:05 ` Steven Rostedt
2008-10-02 21:30 ` Daniel Walker
2008-10-02 22:28 ` Steven Rostedt
2008-10-02 23:24 ` Daniel Walker
2008-10-03 0:26 ` Thomas Gleixner
2008-10-03 14:44 ` Daniel Walker
2008-10-02 14:46 ` Andi Kleen
2008-10-02 21:31 ` Greg KH
2008-10-02 22:33 ` Arjan van de Ven
2008-10-03 3:25 ` Andi Kleen
2008-10-03 3:48 ` Arjan van de Ven [this message]
2008-10-03 4:35 ` Andi Kleen
2008-10-03 3:23 ` Andi Kleen
2008-10-21 1:32 ` [RFC patch] genirq threading for ehci, ohci and uhci USB hosts Sven-Thorsten Dietrich
2008-10-21 2:07 ` Jonathan Woithe
2008-10-21 10:29 ` [RFC patch] genirq threading (v2) for ehci, ohci and uhci USB hosts and ohci1394 Sven-Thorsten Dietrich
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20081002204851.1836e465@infradead.org \
--to=arjan@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=andi@firstfloor.org \
--cc=benh@kernel.crashing.org \
--cc=greg@kroah.com \
--cc=jonathan@jonmasters.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=rostedt@goodmis.org \
--cc=sdietrich@suse.de \
--cc=tglx@linutronix.de \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome