AIM7 40% regression with 2.6.26-rc1
[Posted May 13, 2008 by corbet]
| From: |
| "Zhang, Yanmin" <yanmin_zhang-AT-linux.intel.com> |
| To: |
| Matthew Wilcox <matthew-AT-wil.cx> |
| Subject: |
| AIM7 40% regression with 2.6.26-rc1 |
| Date: |
| Tue, 06 May 2008 13:48:24 +0800 |
| Message-ID: |
| <1210052904.3453.30.camel@ymzhang> |
| Cc: |
| LKML <linux-kernel-AT-vger.kernel.org> |
| Archive‑link: | |
Article |
Comparing with kernel 2.6.25, ?AIM7 (use tmpfs) has ?more than 40% with 2.6.26-rc1
on my 8-core stoakley, 16-core tigerton, and Itanium Montecito. Bisect located
below patch.
64ac24e738823161693bf791f87adc802cf529ff is first bad commit
commit 64ac24e738823161693bf791f87adc802cf529ff
Author: Matthew Wilcox <matthew@wil.cx>
Date: Fri Mar 7 21:55:58 2008 -0500
Generic semaphore implementation
After I manually reverted the patch against 2.6.26-rc1 while fixing lots of
conflictions/errors, aim7 regression became less than 2%.
-yanmin
