From: Prarit Bhargava <prarit@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: 3.0.0-rc6 ~9X system time degradation on kernbench
Date: Fri, 08 Jul 2011 15:36:37 -0400 [thread overview]
Message-ID: <4E175C45.1060700@redhat.com> (raw)
Just some numbers out of kernbench. System Time & Context Switches
climb dramatically between 2.6.38 and 3.0.0-rc6. Currently bisecting to
find out why. .config is based on Fedora's x86_64 .config.
Thu Jul 7 18:23:48 EDT 2011
2.6.38.8-32.fc15.x86_64
Average Half load -j 64 Run (std deviation):
Elapsed Time 155.376 (3.77835)
User Time 4536.18 (11.5886)
System Time 1810.42 (27.0879)
Percent CPU 4086 (100.252)
Context Switches 794941 (3757.3)
Sleeps 754029 (10516)
Thu Jul 7 19:50:38 EDT 2011
3.0.0-rc6
Average Half load -j 64 Run (std deviation):
Elapsed Time 466.362 (2.78605)
User Time 8616.43 (22.5528)
System Time 14583.6 (63.2273)
Percent CPU 4974.2 (19.6265)
Context Switches 2.69157e+06 (7679.26)
Sleeps 827950 (3050.16)
Thu Jul 7 21:30:22 EDT 2011
2.6.39
Average Half load -j 64 Run (std deviation):
Elapsed Time 250.044 (2.55373)
User Time 5361.27 (14.6996)
System Time 5173.44 (14.9366)
Percent CPU 4212.8 (40.4314)
Context Switches 1.28385e+06 (1610.42)
Sleeps 741129 (3339.19)
Fri Jul 8 12:21:29 EDT 2011
3.0.0-rc1
Average Optimal load -j 64 Run (std deviation):
Elapsed Time 435.338 (5.45314)
User Time 6125.78 (15.2816)
System Time 8346.45 (62.5065)
Percent CPU 3324.2 (29.0637)
Context Switches 6.42863e+06 (23420)
Sleeps 996764 (3744.98)
P.
next reply other threads:[~2011-07-08 19:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-08 19:36 Prarit Bhargava [this message]
2011-07-09 0:45 ` 3.0.0-rc6 ~9X system time degradation on kernbench Rik van Riel
2011-07-09 22:48 ` Kyle McMartin
2011-07-14 22:14 ` Prarit Bhargava
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