From: Martin Bligh <mbligh@google.com>
To: linux-kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: -mm seems significanty slower than mainline on kernbench
Date: Tue, 10 Jan 2006 17:14:04 -0800 [thread overview]
Message-ID: <43C45BDC.1050402@google.com> (raw)
OK, I fixed the graphs so you can actually read them now ;-)
http://test.kernel.org/perf/kernbench.elm3b6.png (x86_64 4x)
http://test.kernel.org/perf/kernbench.moe.png (NUMA-Q)
http://test.kernel.org/perf/kernbench.elm3b132.png (4x SMP ia32)
Both seems significantly slower on -mm (mm is green line)
If I look at diffprofile between 2.6.15 and 2.6.15-mm1, it just looks
like we have lots more idle time. You got strange scheduler changes in
there, that you've been carrying for a long time (2.6.14-mm1 at least)?
or HZ piddling? See to be mainly getting much more idle time.
Diffprofile:
1278 39.6% default_idle
1261 10.1% total
243 1518.8% find_get_page
220 0.0% copy_user_generic
100 357.1% free_hot_cold_page
...
-106 -93.0% __pagevec_free
-125 -100.0% __free_pages_ok
-239 -100.0% copy_user_generic_c
-242 -100.0% find_trylock_page
Original profiles:
http://test.kernel.org/19657/002.kernbench.test/profiling/profile.text
(2.6.15)
http://test.kernel.org/19794/002.kernbench.test/profiling/profile.text
(2.6.15-mm1)
next reply other threads:[~2006-01-11 1:14 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-11 1:14 Martin Bligh [this message]
2006-01-11 1:31 ` -mm seems significanty slower than mainline on kernbench Andrew Morton
2006-01-11 1:41 ` Martin Bligh
2006-01-11 1:48 ` Andrew Morton
2006-01-11 1:49 ` Con Kolivas
2006-01-11 2:38 ` Peter Williams
2006-01-11 3:07 ` Con Kolivas
2006-01-11 3:12 ` Martin Bligh
2006-01-11 3:40 ` Peter Williams
2006-01-11 3:49 ` Con Kolivas
2006-01-11 4:33 ` Peter Williams
2006-01-11 5:14 ` Peter Williams
2006-01-11 6:21 ` Martin J. Bligh
2006-01-11 12:24 ` Peter Williams
2006-01-11 14:29 ` Con Kolivas
2006-01-11 22:05 ` Peter Williams
2006-01-12 0:54 ` Peter Williams
2006-01-12 1:18 ` Con Kolivas
2006-01-12 1:29 ` Peter Williams
2006-01-12 1:36 ` Con Kolivas
2006-01-12 2:23 ` Peter Williams
2006-01-12 2:26 ` Martin Bligh
2006-01-12 6:39 ` Con Kolivas
2006-01-23 19:28 ` Martin Bligh
2006-01-24 1:25 ` Peter Williams
2006-01-24 3:50 ` Peter Williams
2006-01-24 4:41 ` Martin J. Bligh
2006-01-24 6:22 ` Peter Williams
2006-01-24 6:42 ` Martin J. Bligh
2006-01-28 23:20 ` Peter Williams
2006-01-29 0:52 ` Martin J. Bligh
2006-01-12 2:27 ` Con Kolivas
2006-01-12 2:04 ` Martin Bligh
2006-01-12 6:35 ` Martin J. Bligh
2006-01-12 6:41 ` Con Kolivas
2006-01-12 6:54 ` Peter Williams
2006-01-12 18:39 ` Martin Bligh
2006-01-12 20:03 ` Peter Williams
2006-01-12 22:20 ` Peter Williams
2006-01-13 7:06 ` Peter Williams
2006-01-13 12:00 ` Peter Williams
2006-01-13 16:15 ` Martin J. Bligh
2006-01-13 16:26 ` Andy Whitcroft
2006-01-13 17:54 ` Andy Whitcroft
2006-01-13 20:41 ` Martin Bligh
2006-01-14 0:23 ` Peter Williams
2006-01-14 5:03 ` Nick Piggin
2006-01-14 5:40 ` Con Kolivas
2006-01-14 6:05 ` Nick Piggin
2006-01-14 5:53 ` Peter Williams
2006-01-14 6:13 ` Nick Piggin
2006-01-13 22:59 ` Peter Williams
2006-01-14 18:48 ` Martin J. Bligh
2006-01-15 0:05 ` Peter Williams
2006-01-15 2:04 ` Con Kolivas
2006-01-15 2:09 ` [PATCH] sched - remove unnecessary smpnice ifdefs Con Kolivas
2006-01-15 3:50 ` -mm seems significanty slower than mainline on kernbench Ingo Molnar
2006-01-12 1:25 ` Peter Williams
2006-01-11 1:52 ` Andrew Morton
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