From: linas@austin.ibm.com (Linas Vepstas)
To: Maxim Uvarov <muvarov@ru.mvista.com>
Cc: linuxppc-dev@ozlabs.org,
Andrew Morton <akpm@linux-foundation.org>,
pavel@ucw.cz, wli@holomorphy.com, dada1@cosmosbay.com
Subject: Re: [PATCH] Performance Stats: Kernel patch
Date: Thu, 10 May 2007 11:47:11 -0500 [thread overview]
Message-ID: <20070510164710.GC4452@austin.ibm.com> (raw)
In-Reply-To: <4642F27E.10700@ru.mvista.com>
On Thu, May 10, 2007 at 10:22:54AM +0000, Maxim Uvarov wrote:
> Linas Vepstas wrote:
> >On Tue, May 08, 2007 at 04:26:51PM +0000, Maxim Uvarov wrote:
> >>+ addq $1, threadinfo_syscall_count(%rcx) # Increment syscalls
> >
> >again, #ifdef CONFIG_TASKSTATS,
>
> So I don't really sure if defines are needed in entry.S code. I tried
> to do
> some tests and it is impossible to catch the performance difference (small
> overhead).
"A penny here, and a penny there, and pretty soon it adds up to real
money". Its a hot path, and its an easy fix.
--linas
next prev parent reply other threads:[~2007-05-10 16:47 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-08 16:26 [PATCH] Performance Stats: Kernel patch Maxim Uvarov
2007-05-08 19:32 ` Andrew Morton
2007-05-10 11:11 ` Maxim Uvarov
2007-05-10 18:12 ` Andrew Morton
2007-05-11 16:51 ` Maxim Uvarov
2007-05-11 17:23 ` Using kprobes [was " Linas Vepstas
2007-05-12 9:15 ` Christoph Hellwig
2007-05-21 15:28 ` Maxim Uvarov
2007-05-08 23:32 ` Linas Vepstas
2007-05-10 10:22 ` Maxim Uvarov
2007-05-10 16:47 ` Linas Vepstas [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-06-05 14:43 Maxim Uvarov
2007-06-06 6:38 ` Andrew Morton
2007-06-06 17:29 ` Jay Lan
2007-05-30 18:49 Maxim Uvarov
2007-06-04 19:19 ` Andrew Morton
2007-06-04 19:33 ` Jay Lan
2007-06-04 19:49 ` Jonathan Lim
2007-06-04 20:13 ` Jay Lan
2007-06-05 6:50 ` Balbir Singh
2007-05-22 17:19 Maxim Uvarov
2007-05-22 17:19 ` Maxim Uvarov
2007-05-22 18:48 ` Dave Jones
2007-05-22 18:48 ` Dave Jones
2007-05-22 20:08 ` Andrew Morton
2007-05-22 20:08 ` Andrew Morton
2007-05-11 17:13 Maxim Uvarov
2007-05-11 17:13 ` Maxim Uvarov
2007-05-12 10:39 ` Andrea Righi
2007-05-12 10:39 ` Andrea Righi
2007-05-10 17:19 Maxim Uvarov
2007-05-10 23:31 ` Andi Kleen
2007-05-11 16:55 ` Maxim Uvarov
2007-05-10 12:39 Maxim Uvarov
2007-05-10 12:38 ` Josh Boyer
2007-05-10 18:23 ` Maxim Uvarov
2007-05-10 11:42 Maxim Uvarov
2007-05-10 12:03 ` Pavel Machek
2007-05-10 18:25 ` Andrew Morton
[not found] <4625FFCF.8040402@ru.mvista.com>
2007-04-20 4:36 ` [patch] " Andrew Morton
2007-04-25 10:59 ` Maxim Uvarov
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