From: Mike Kravetz <kravetz@us.ibm.com>
To: Paul Mackerras <paulus@samba.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
Bryan Rosenburg <rosnbrg@us.ibm.com>,
linuxppc-dev@ozlabs.org, Nathan Lynch <ntl@pobox.com>,
Christopher Yeoh <cyeoh@samba.org>
Subject: [PATCH 0/3] powerpc: Instrument Hypervisor Calls
Date: Fri, 14 Jul 2006 16:37:39 -0700 [thread overview]
Message-ID: <20060714233739.GA11487@monkey.ibm.com> (raw)
Hi Paul,
Here is an updated version of the patch(es) to instrument hcalls. All
issues from the previous versions have been addressed. Although, I
haven't really discovered an elegant solution to the assembly routine
name juggling.
In addition, there has been some discussion of these patches on IRC.
Some remaining issues/questions are:
- Exactly how much overhead does the statistic gathering introduce?
- What would be the cost of disabling preemption for more accurate statistics?
- What would be the cost of disabling interrupts for more accurate statistics?
- Should we extend this statistic gathering to RTAS calls?
I would like to get this basic code integrated and then start to address
some of these questions. The IBM performance group will help in
benchmarking to determine overhead.
Please note that all code is behind a config option (off by default) with
zero impact unless enabled.
--
Mike
next reply other threads:[~2006-07-14 23:37 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-14 23:37 Mike Kravetz [this message]
2006-07-14 23:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz
2006-07-14 23:40 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add wrappers Mike Kravetz
2006-07-15 0:15 ` Nathan Lynch
2006-07-15 0:41 ` Mike Kravetz
2006-07-15 8:03 ` Nathan Lynch
2006-07-14 23:41 ` [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs files Mike Kravetz
2006-07-15 0:00 ` [PATCH 0/3] powerpc: Instrument Hypervisor Calls Arnd Bergmann
2006-07-15 0:06 ` Mike Kravetz
2006-07-15 15:30 ` Anton Blanchard
2006-07-15 16:42 ` Arnd Bergmann
2006-07-15 22:07 ` Anton Blanchard
2006-07-16 23:02 ` Luke Browning
2006-07-17 2:02 ` Luke Browning
2006-07-16 3:53 ` Olof Johansson
2006-07-16 22:53 ` Luke Browning
2006-07-16 23:09 ` Olof Johansson
-- strict thread matches above, loose matches on Subject: below --
2006-07-21 6:38 Mike Kravetz
2006-07-18 20:47 Mike Kravetz
2006-07-18 21:00 ` Paul Mackerras
2006-07-19 3:36 ` Mike Kravetz
2006-07-19 22:11 ` Mike Kravetz
2006-07-18 21:29 ` Mike Kravetz
2006-07-18 22:38 ` Olof Johansson
2006-06-22 22:56 Mike Kravetz
2006-06-23 0:28 ` Segher Boessenkool
2006-07-10 20:35 ` Mike Kravetz
2006-07-10 20:49 ` Arnd Bergmann
2006-07-12 18:05 ` Mike Kravetz
2006-06-14 3:47 Mike Kravetz
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