From: Paul Mackerras <paulus@samba.org>
To: Nathan Lynch <ntl@pobox.com>
Cc: Bryan Rosenburg <rosnbrg@us.ibm.com>,
Christopher Yeoh <cyeoh@samba.org>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add wrappers
Date: Thu, 15 Jun 2006 08:33:55 +1000 [thread overview]
Message-ID: <17552.36563.460775.131555@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <20060614144230.GE26750@localdomain>
Nathan Lynch writes:
> Without disabling preemption around the mfspr ... update_stats section
> in these hcall wrappers, you risk updating the stats on the wrong cpu.
I think we are only looking for total counts and times anyway, so it
doesn't really matter which cpu updates the stats, as long as the time
gets accounted on some cpu. The use of per-cpu counters is just for
better cache behaviour.
Paul.
next prev parent reply other threads:[~2006-06-14 22:33 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-14 3:47 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz
2006-06-14 3:50 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz
2006-06-14 3:52 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add wrappers Mike Kravetz
2006-06-14 7:23 ` Arnd Bergmann
2006-06-14 14:42 ` Nathan Lynch
2006-06-14 22:33 ` Paul Mackerras [this message]
2006-06-14 22:40 ` Nathan Lynch
2006-06-14 23:52 ` Mike Kravetz
2006-06-15 11:09 ` Arnd Bergmann
2006-06-15 14:58 ` Mike Kravetz
2006-06-15 16:06 ` Arnd Bergmann
2006-06-16 16:11 ` Mike Kravetz
2006-06-14 3:54 ` [PATCH 0/3] powerpc: Instrument Hypervisor Calls: add sysfs files Mike Kravetz
2006-06-14 14:22 ` Nathan Lynch
2006-06-15 11:45 ` Christopher Yeoh
2006-06-14 14:30 ` Dave C Boutcher
2006-06-14 14:39 ` [RFC] New hcall mechanism Was: [PATCH 0/3] powerpc: Instrument Hypervisor Calls Jimi Xenidis
-- strict thread matches above, loose matches on Subject: below --
2006-06-22 22:56 Mike Kravetz
2006-06-22 22:58 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add wrappers Mike Kravetz
2006-07-14 23:37 [PATCH 0/3] powerpc: Instrument Hypervisor Calls 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
2006-07-18 20:47 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz
2006-07-18 20:49 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add wrappers Mike Kravetz
2006-07-18 22:34 ` Olof Johansson
2006-07-18 23:18 ` Mike Kravetz
2006-07-19 3:33 ` Olof Johansson
2006-07-19 3:50 ` Mike Kravetz
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