Hey folks,
Anyone know about the difference between the ondemand vs conservative
frequency governors? I'm on a core2duo dual core intel type chip, and
I am getting much better performance with conservative selected. I
first heard about the conservative governor in the context of getting
better flash video performance, but it looks better accross the board
for me. I will post some kraken benchmarks at the bottom so you can
see what I'm talking about. I've also vaguely tested with some video
compression, and it looks similar in performance to me.
Should I file a bug against ondemand? or a bug requesting the default
governor be conservative? I really don't know. IMHO, the performance
difference and the non-obviousness of how to change the defaults (it
looks like you have to edit the upstart script) warrant some sort of
change.
Thanks,
Dan
TEST COMPARISON FROM
TO DETAILS
====================================================================================
** TOTAL **: 1.25x as fast 33744.5ms +/- 2.5%
27033.1ms +/- 1.4% significant
====================================================================================
ai: 1.194x as fast 1410.6ms +/- 3.9%
1181.2ms +/- 8.1% significant
astar: 1.194x as fast 1410.6ms +/- 3.9%
1181.2ms +/- 8.1% significant
audio: 1.25x as fast 13168.3ms +/- 2.4%
10561.9ms +/- 2.0% significant
beat-detection: 1.26x as fast 4669.0ms +/- 3.3%
3704.0ms +/- 3.5% significant
dft: 1.098x as fast 2559.1ms +/- 3.5%
2330.6ms +/- 2.4% significant
fft: 1.30x as fast 4577.2ms +/- 4.8%
3508.8ms +/- 2.3% significant
oscillator: 1.34x as fast 1363.0ms +/- 2.0%
1018.5ms +/- 3.3% significant
imaging: 1.25x as fast 13957.9ms +/- 4.8%
11158.0ms +/- 2.2% significant
gaussian-blur: 1.29x as fast 6846.8ms +/- 9.6%
5296.9ms +/- 2.6% significant
darkroom: 1.22x as fast 3387.3ms +/- 4.0%
2783.7ms +/- 3.0% significant
desaturate: 1.21x as fast 3723.8ms +/- 3.6%
3077.4ms +/- 6.6% significant
json: 1.31x as fast 1359.7ms +/- 3.4%
1041.7ms +/- 3.7% significant
parse-financial: 1.35x as fast 783.6ms +/- 4.7%
578.6ms +/- 2.9% significant
stringify-tinderbox: 1.24x as fast 576.1ms +/- 8.1%
463.1ms +/- 5.7% significant
stanford: 1.25x as fast 3848.0ms +/- 2.6%
3090.3ms +/- 4.9% significant
crypto-aes: 1.26x as fast 720.0ms +/- 6.8%
569.5ms +/- 6.6% significant
crypto-ccm: 1.21x as fast 610.5ms +/- 8.6%
503.5ms +/- 5.2% significant
crypto-pbkdf2: 1.24x as fast 1876.0ms +/- 4.4%
1507.8ms +/- 6.2% significant
crypto-sha256-iterative: 1.26x as fast 641.5ms +/- 5.5%
509.5ms +/- 5.0% significant
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