From: Andi Kleen <andi@firstfloor.org>
To: Paul Mundt <lethal@linux-sh.org>,
Andi Kleen <andi@firstfloor.org>,
David Miller <davem@davemloft.net>,
mingo@elte.hu, a.p.zijlstra@chello.nl, paulus@samba.org,
tglx@linutronix.deli
Subject: Re: [patch 0/3] [Announcement] Performance Counters for Linux
Date: Wed, 10 Dec 2008 12:03:14 +0100 [thread overview]
Message-ID: <20081210110314.GA25779@one.firstfloor.org> (raw)
In-Reply-To: <20081210102335.GA30942@linux-sh.org>
On Wed, Dec 10, 2008 at 07:23:36PM +0900, Paul Mundt wrote:
> On Wed, Dec 10, 2008 at 11:28:19AM +0100, Andi Kleen wrote:
> > > Oprofile has been a pretty bad fit for them, and while I'm slightly more
> >
> > You could always use a extension of timer mode that reads them
> > periodically?
> >
> This is what I do today, but it is not an ideal solution. It would be
> nice if these sorts of use cases could be supported by newer frameworks
> without every platform with similar requirements having to implement
> workarounds hanging off of the timer IRQ.
But you shouldn't hang off the timer irq anyways, but better use a regular
timer or hr timer. This would give more regular sampling even with dyntick.
And doing such a timer is only a few lines of code, I'm not sure it would
buy you all that much to generalize it.
-Andi
--
ak@linux.intel.com
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Paul Mundt <lethal@linux-sh.org>,
Andi Kleen <andi@firstfloor.org>,
David Miller <davem@davemloft.net>,
mingo@elte.hu, a.p.zijlstra@chello.nl, paulus@samba.org,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, akpm@linux-foundation.org,
eranian@googlemail.com, dada1@cosmosbay.com,
robert.richter@amd.com, arjan@infradead.org, hpa@zytor.com,
rostedt@goodmis.org
Subject: Re: [patch 0/3] [Announcement] Performance Counters for Linux
Date: Wed, 10 Dec 2008 12:03:14 +0100 [thread overview]
Message-ID: <20081210110314.GA25779@one.firstfloor.org> (raw)
Message-ID: <20081210110314.RjUh2ndOy7jLnpJY8WkyM4DnGFgdyIZMWFRhtUjSoGA@z> (raw)
In-Reply-To: <20081210102335.GA30942@linux-sh.org>
On Wed, Dec 10, 2008 at 07:23:36PM +0900, Paul Mundt wrote:
> On Wed, Dec 10, 2008 at 11:28:19AM +0100, Andi Kleen wrote:
> > > Oprofile has been a pretty bad fit for them, and while I'm slightly more
> >
> > You could always use a extension of timer mode that reads them
> > periodically?
> >
> This is what I do today, but it is not an ideal solution. It would be
> nice if these sorts of use cases could be supported by newer frameworks
> without every platform with similar requirements having to implement
> workarounds hanging off of the timer IRQ.
But you shouldn't hang off the timer irq anyways, but better use a regular
timer or hr timer. This would give more regular sampling even with dyntick.
And doing such a timer is only a few lines of code, I'm not sure it would
buy you all that much to generalize it.
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-12-10 10:51 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-04 23:44 [patch 0/3] [Announcement] Performance Counters for Linux Thomas Gleixner
2008-12-04 23:44 ` [patch 1/3] performance counters: core code Thomas Gleixner
2008-12-05 10:55 ` Paul Mackerras
2008-12-05 11:20 ` Ingo Molnar
2008-12-04 23:44 ` [patch 2/3] performance counters: documentation Thomas Gleixner
2008-12-05 0:33 ` Paul Mackerras
2008-12-05 0:37 ` David Miller
2008-12-05 2:50 ` Arjan van de Ven
2008-12-05 3:26 ` David Miller
2008-12-05 2:33 ` Andi Kleen
2008-12-04 23:45 ` [patch 3/3] performance counters: x86 support Thomas Gleixner
2008-12-05 0:22 ` [patch 0/3] [Announcement] Performance Counters for Linux Paul Mackerras
2008-12-05 6:31 ` Ingo Molnar
2008-12-05 7:02 ` Arjan van de Ven
2008-12-05 7:52 ` David Miller
2008-12-05 7:03 ` Ingo Molnar
2008-12-05 7:16 ` Peter Zijlstra
2008-12-05 7:57 ` Paul Mackerras
2008-12-05 8:03 ` Peter Zijlstra
2008-12-05 8:07 ` David Miller
2008-12-05 8:11 ` Ingo Molnar
2008-12-05 8:17 ` David Miller
2008-12-05 8:24 ` Ingo Molnar
2008-12-05 8:27 ` David Miller
2008-12-05 8:42 ` Ingo Molnar
2008-12-05 8:49 ` David Miller
2008-12-05 12:13 ` Ingo Molnar
2008-12-05 12:39 ` Andi Kleen
2008-12-05 20:08 ` David Miller
2008-12-10 3:48 ` Paul Mundt
2008-12-10 4:42 ` Paul Mackerras
2008-12-10 8:43 ` Mikael Pettersson
2008-12-10 10:28 ` Andi Kleen
2008-12-10 10:28 ` Andi Kleen
2008-12-10 10:23 ` Paul Mundt
2008-12-10 11:03 ` Andi Kleen [this message]
2008-12-10 11:03 ` Andi Kleen
2008-12-05 15:00 ` Arjan van de Ven
2008-12-05 9:16 ` Paul Mackerras
2008-12-05 7:57 ` David Miller
2008-12-05 8:18 ` Ingo Molnar
2008-12-05 8:20 ` David Miller
2008-12-05 7:54 ` Paul Mackerras
2008-12-05 8:08 ` Ingo Molnar
2008-12-05 8:15 ` David Miller
2008-12-05 13:25 ` Ingo Molnar
2008-12-05 9:10 ` Paul Mackerras
2008-12-05 12:07 ` Ingo Molnar
2008-12-06 0:05 ` Paul Mackerras
2008-12-06 1:23 ` Mikael Pettersson
2008-12-06 12:34 ` Peter Zijlstra
2008-12-07 5:15 ` Paul Mackerras
2008-12-08 7:18 ` stephane eranian
2008-12-08 11:11 ` Ingo Molnar
2008-12-08 11:58 ` David Miller
2008-12-09 0:21 ` stephane eranian
2008-12-05 0:22 ` H. Peter Anvin
2008-12-05 0:43 ` Paul Mackerras
2008-12-05 1:12 ` David Miller
2008-12-05 6:10 ` Ingo Molnar
2008-12-05 7:50 ` David Miller
2008-12-05 9:34 ` Paul Mackerras
2008-12-05 10:41 ` Ingo Molnar
2008-12-05 10:05 ` Ingo Molnar
2008-12-05 3:30 ` Andrew Morton
2008-12-06 2:36 ` stephane eranian
2008-12-08 2:12 ` [perfmon2] [patch 0/3] [Announcement] Performance Counters forLinux Dan Terpstra
2008-12-08 2:12 ` Dan Terpstra
2008-12-10 16:27 ` [patch 0/3] [Announcement] Performance Counters for Linux Rob Fowler
2008-12-10 16:27 ` [perfmon2] " Rob Fowler
2008-12-10 17:11 ` Andi Kleen
2008-12-10 17:11 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2008-12-05 21:24 Corey Ashford
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=20081210110314.GA25779@one.firstfloor.org \
--to=andi@firstfloor.org \
--cc=a.p.zijlstra@chello.nl \
--cc=davem@davemloft.net \
--cc=lethal@linux-sh.org \
--cc=mingo@elte.hu \
--cc=paulus@samba.org \
--cc=tglx@linutronix.deli \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.