From: Mike Grundy <grundym@us.ibm.com>
To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>,
Jan Glauber <jan.glauber@de.ibm.com>,
linux-kernel@vger.kernel.org, systemtap@sources.redhat.com
Subject: Re: [PATCH] kprobes for s390 architecture
Date: Tue, 11 Jul 2006 09:54:30 -0400 [thread overview]
Message-ID: <20060711135430.GA5070@localhost.localdomain> (raw)
In-Reply-To: <20060707172555.GA10452@osiris.ibm.com>
On Fri, Jul 07, 2006 at 07:25:55PM +0200, Heiko Carstens wrote:
> > ok, I tried, but my "better ideas" made things worse. stop_machine_run() wins:
> How fast is this if you have to exchange several hundred instructions?
I did a little measuring. On average stop_machine_run() adds 8.7 msec of
overhead on a 4-way config. Of that %57 was sub-msec overhead. For the times
where overhead was measurable, the average was 20.2 msec, lowest at 10msec
highest at 100msec. That's on a z800 under vm and I have no idea how many real
cpus the machine has :-)
--
Thanks
Mike
=========================================
Michael Grundy - grundym@us.ibm.com
Advanced Linux Response Team (ALRT)
http://ltc.linux.ibm.com/teamweb/alrt/
845-435-8842 (T/L 295)
If at first you don't succeed, call in an air strike.
next prev parent reply other threads:[~2006-07-11 13:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060623150344.GL9446@osiris.boeblingen.de.ibm.com>
2006-06-23 22:53 ` [heiko.carstens@de.ibm.com: Re: [PATCH] kprobes for s390 architecture] Michael Grundy
2006-06-23 22:21 ` [PATCH] kprobes for s390 architecture Heiko Carstens
2006-06-24 11:36 ` Heiko Carstens
2006-06-24 12:15 ` Heiko Carstens
2006-06-25 13:31 ` Mike Grundy
2006-06-26 8:09 ` Heiko Carstens
2006-06-26 10:49 ` Mike Grundy
2006-06-26 11:19 ` Heiko Carstens
2006-06-27 15:23 ` Martin Schwidefsky
2006-06-28 5:58 ` Heiko Carstens
2006-07-07 17:23 ` Mike Grundy
2006-07-07 17:25 ` Heiko Carstens
2006-07-08 18:54 ` Mike Grundy
2006-07-08 19:58 ` Mike Grundy
2006-07-10 9:28 ` Heiko Carstens
2006-07-10 22:20 ` Mike Grundy
2006-07-11 13:54 ` Mike Grundy [this message]
2006-07-11 14:13 ` Martin Schwidefsky
2006-06-12 13:15 Mike Grundy
2006-06-12 19:40 ` Martin Schwidefsky
2006-06-21 4:28 ` Mike Grundy
2006-06-21 16:38 ` Martin Schwidefsky
2006-06-21 17:15 ` Mike Grundy
2006-06-27 11:56 ` Martin Schwidefsky
2006-06-21 17:34 ` Mike Grundy
2006-06-22 11:28 ` Jan Glauber
2006-06-22 16:36 ` Mike Grundy
2006-06-23 8:50 ` Jan Glauber
2006-06-23 14:38 ` Heiko Carstens
2006-06-22 1:38 ` Mike Grundy
2006-06-21 9:40 ` Jan Glauber
2006-06-21 16:23 ` Jan Glauber
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=20060711135430.GA5070@localhost.localdomain \
--to=grundym@us.ibm.com \
--cc=heiko.carstens@de.ibm.com \
--cc=jan.glauber@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=schwidefsky@de.ibm.com \
--cc=systemtap@sources.redhat.com \
/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.