From: Marcus Hartig <m.f.h@web.de>
To: linux-kernel@vger.kernel.org
Subject: 2.6.5 latencytest +aa5 +mm3 as/cfq scheduler
Date: Fri, 09 Apr 2004 23:47:17 +0200 [thread overview]
Message-ID: <407719E5.8050203@web.de> (raw)
Hello,
I've done some benchs with:
http://www.alsa-project.org/~iwai/alsa.html#LatencyTest
Test condition:
CPU load = 0.8
RTC freq = 1024
RTC wakeup count = 2
Deadline = 2
X-test = yes
Proc-test = yes
Disk-test = yes
Filesize = 1000000000
With the last stable kernel release 2.6.5 compared with -aa5 and -mm3 to
see which scheduler/kernel has a good or low latency.
XP Barton 2800+, 512MB PC-333, Abit NF-S-V2 nForce2, SATA Maxtor 80GB,
ASUS 5700 FX. Fedora Core 1.91 test2, xorg-x11-0.6.6-0.2004_03_30.5, GNOME
2.6, libata, reiserfs. Same .config as possible. All fresh booted in
init5, latencytest-0.5.2 running in each case from an xterm.
---------- 2.6.5-mm3 CFQ scheduler ----------
x11.log:
cpu_hz = 2.08855e+09
cpu_load=0.800000 loops per run = 645209
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.06087 ms (overrun 0)
within 1ms = 39555, factor = 99.9798%
within 2ms = 39563, factor = 100%
deviation = 0.021617
proc.log:
cpu_hz = 2.08855e+09
cpu_load=0.800000 loops per run = 645240
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.02978 ms (overrun 0)
within 1ms = 15406, factor = 99.9676%
within 2ms = 15411, factor = 100%
deviation = 0.0219986
diskwrite.log:
cpu_hz = 2.08855e+09
cpu_load=0.800000 loops per run = 645217
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.03607 ms (overrun 0)
within 1ms = 15484, factor = 99.9548%
within 2ms = 15491, factor = 100%
deviation = 0.0451227
diskcopy.log:
cpu_hz = 2.08855e+09
cpu_load=0.800000 loops per run = 644828
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.0494 ms (overrun 0)
within 1ms = 53058, factor = 99.9699%
within 2ms = 53074, factor = 100%
deviation = 0.0380116
diskread.log:
cpu_hz = 2.08855e+09
cpu_load=0.800000 loops per run = 645205
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.25948 ms (overrun 0)
within 1ms = 37351, factor = 99.9304%
within 2ms = 37377, factor = 100%
deviation = 0.0339693
---------- 2.6.5-mm3 AS scheduler ----------
x11.log:
cpu_hz = 2.08832e+09
cpu_load=0.800000 loops per run = 645104
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.05296 ms (overrun 0)
within 1ms = 38316, factor = 99.9791%
within 2ms = 38324, factor = 100%
deviation = 0.0216183
proc.log:
cpu_hz = 2.08832e+09
cpu_load=0.800000 loops per run = 645163
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.03901 ms (overrun 0)
within 1ms = 15405, factor = 99.9546%
within 2ms = 15412, factor = 100%
deviation = 0.0223874
diskwrite.log:
cpu_hz = 2.08832e+09
cpu_load=0.800000 loops per run = 645114
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.06489 ms (overrun 0)
within 1ms = 16688, factor = 99.9521%
within 2ms = 16696, factor = 100%
deviation = 0.0433707
diskcopy.log:
cpu_hz = 2.08832e+09
cpu_load=0.800000 loops per run = 644503
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.10258 ms (overrun 0)
within 1ms = 38427, factor = 99.9662%
within 2ms = 38440, factor = 100%
deviation = 0.0456989
diskread.log:
cpu_hz = 2.08832e+09
cpu_load=0.800000 loops per run = 645152
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.44847 ms (overrun 0)
within 1ms = 34704, factor = 99.928%
within 2ms = 34729, factor = 100%
deviation = 0.0357967
---------- 2.6.5-aa5 AS scheduler ----------
x11.log:
cpu_hz = 2.08797e+09
cpu_load=0.800000 loops per run = 645080
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.05035 ms (overrun 0)
within 1ms = 39333, factor = 99.9797%
within 2ms = 39341, factor = 100%
deviation = 0.0215519
proc.log:
cpu_hz = 2.08797e+09
cpu_load=0.800000 loops per run = 644734
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.04263 ms (overrun 0)
within 1ms = 15399, factor = 99.9675%
within 2ms = 15404, factor = 100%
deviation = 0.0220961
diskwrite.log:
cpu_hz = 2.08797e+09
cpu_load=0.800000 loops per run = 645054
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.08033 ms (overrun 0)
within 1ms = 14817, factor = 99.9393%
within 2ms = 14826, factor = 100%
deviation = 0.0457863
diskcopy.log:
cpu_hz = 2.08797e+09
cpu_load=0.800000 loops per run = 645086
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.1242 ms (overrun 0)
within 1ms = 38657, factor = 99.9586%
within 2ms = 38673, factor = 100%
deviation = 0.0395391
diskread.log:
cpu_hz = 2.08797e+09
cpu_load=0.800000 loops per run = 645088
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.42394 ms (overrun 0)
within 1ms = 35125, factor = 99.926%
within 2ms = 35151, factor = 100%
deviation = 0.0341163
---------- 2.6.5 AS scheduler ----------
x11.log:
cpu_hz = 2.08801e+09
cpu_load=0.800000 loops per run = 645059
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.0537 ms (overrun 0)
within 1ms = 39353, factor = 99.9771%
within 2ms = 39362, factor = 100%
deviation = 0.0218243
proc.log:
cpu_hz = 2.08801e+09
cpu_load=0.800000 loops per run = 645044
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.03839 ms (overrun 0)
within 1ms = 15404, factor = 99.9416%
within 2ms = 15413, factor = 100%
deviation = 0.0226547
diskwrite.log:
cpu_hz = 2.08801e+09
cpu_load=0.800000 loops per run = 644705
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 4.51782 ms (overrun 4)
within 1ms = 13287, factor = 99.9248%
within 2ms = 13293, factor = 99.9699%
deviation = 0.0516117
diskcopy.log:
cpu_hz = 2.08801e+09
cpu_load=0.800000 loops per run = 645081
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 4.09889 ms (overrun 1)
within 1ms = 37387, factor = 99.9358%
within 2ms = 37410, factor = 99.9973%
deviation = 0.043017
diskread.log:
cpu_hz = 2.08801e+09
cpu_load=0.800000 loops per run = 645099
total latency = 1.953125 ms
cpu latency = 1.562500 ms
max diff = 3.36909 ms (overrun 0)
within 1ms = 35446, factor = 99.9295%
within 2ms = 35471, factor = 100%
deviation = 0.033815
-----------------------------------------
The vanilla 2.6.5 has overruns here, bad against the others here.
Happy Easter all,
Marcus
next reply other threads:[~2004-04-09 21:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-09 21:47 Marcus Hartig [this message]
2004-04-11 8:27 ` 2.6.5 latencytest +aa5 +mm3 as/cfq scheduler Redeeman
-- strict thread matches above, loose matches on Subject: below --
2004-04-10 6:58 Marcus Hartig
2004-04-10 17:41 Marcus Hartig
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