Re: DSCHED and interbench
>On 21 February 2011 14:57, Venkatesh Srinivas <me@endeavour.zapto.org> wrote:
>> Hi,
>>
>> Just have some numbers for interbench comparing dsched none to dsched FQ.
>>
>> These numbers are from a 12/31/2010 kernel, on an Atom N270 running an SMP
>> kernel. The disk was an ata/100 disk connected via a USB bridge.
>>
>> Interbench
>> dsched noop
>>
>> (Audio)
>> TestꂠꀠLatency/SD (ms) Max latencyꂠꀠ% cpuꂠꀠ% deadlines hit
>> Noneꀠ0.03 +/- 0.0306ꂠꀠ0.057ꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Video 0.045 +/- 0.033ꂠ ꀠ8.04ꂠꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Xꂠꂠꂠꀠ0.033 +/- 0.033ꂠꂠ 0.074ꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Burnꀠ0.051 +/- 0.266ꂠꂠꀠ6.45ꂠꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Writeꀠ2.55 +/- 13.5ꂠꂠꂠꂠ 119ꂠꂠꂠꂠꂠꂠꂠꂠꀠ98.5ꂠꂠꂠꀠ97.8
>> Readꀠ0.132 ++/ 1.09ꂠꂠꀠ26.5ꂠꂠꂠꂠꂠꂠꂠꂠ 100ꂠꂠꂠꂠ 100
>> Compile 2.67 +/- 13.4ꂠꂠ 131ꂠꂠꂠꂠꂠꂠꂠꂠꂠ 99ꂠꂠꂠꂠꀠ98.7
>> Memload 2.41 +/- 29.6ꂠꀠ634ꂠꂠꂠꂠꂠꂠꂠꂠꀠ96.6ꂠꂠꂠꀠ96.6
>>
>> (Video)
>> TestꂠꀠLatency/SD (ms) Max latencyꂠꀠ% cpuꂠꀠ% deadlines hit
>> Noneꀠ0.06 +/- 0.88 ꂠꂠꂠꀠ33.4ꀠꂠꂠꂠꂠꂠꂠꀠ99.9 ꂠꂠꂠ 99.9
>> Xꂠꂠꂠꀠ0.097 +/- 1.86 ꂠ ꂠ 65.9 ꂠꂠꂠꂠꂠꂠꂠꀠ99.8 ꂠꂠꂠ 99.8
>> Burnꀠ33.7 +/- 93.6 ꂠꂠꂠꂠ 535 ꂠꂠꂠꂠꂠꂠꂠꂠ 45.1 ꂠꂠꂠꀠ43.4
>> Writeꀠ3.03 +/- 11.7 ꂠꂠꂠꀠ169ꂠꂠꂠꂠꂠꂠꂠꂠꀠ89.2 ꂠꂠꂠ 86.9
>> Readꀠ0.108 +/- 0.87ꂠꂠꂠ 36.2 ꂠꂠꂠꂠꂠꂠꂠꀠ99.9 ꂠꂠꂠ 99.9
>> Compile 25.8 +/- 60.7 ꂠꂠ 434 ꂠꂠꂠꂠꂠꂠꂠꂠ 49.6 ꂠꂠꀠ40.1
>> Memload 1.69 +/- 23.8 ꂠ 603 ꂠꂠꂠꂠꂠꂠꂠꂠ 95.3 ꂠꂠꂠ 94.7
>>
>> dsched fq
>>
>> (Audio)
>> TestꂠꀠLatency/SD (ms) Max latencyꂠꀠ% cpuꂠꀠ% deadlines hit
>> Noneꀠ0.087 +/- 1.06 ꂠꂠ 24.2 ꀠꂠꂠꂠꂠꂠꂠ 100ꂠꂠꂠꂠ 100
>> Video 0.076 +/- 0.598 ꀠꀠ10.4ꂠꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Xꂠꂠꂠꀠ0.195 +/- 3.91 ꀠꂠꀠ95.7 ꂠꂠꂠꂠꂠꂠꂠ 100ꂠꂠꂠꂠ 99.8
>> Burnꀠ0.095 +/- 0.778 ꂠꂠ 13.6 ꂠꂠꂠꂠꂠꂠꂠ 100ꂠꂠꂠꂠ 100
>> Writeꀠ2.1 +/- 10.8 ꂠꂠꂠꂠꀠ134 ꂠꂠꂠꂠꂠꂠꂠꂠ 99.2 ꂠꂠꂠ 99
>> Readꀠ0.128 +/- 0.655 ꂠꀠ11.4 ꂠꂠꂠꂠꂠꂠꂠꀠ100ꂠꂠꂠꂠ 100
>> Compile 1.13 +/- 4.65 ꂠꂠ 28.9 ꂠꂠꂠꂠꂠꂠꂠꀠ100 ꂠꂠꂠꀠ100
>> Memload 2.54 +/- 19.5 ꂠꀠ309 ꂠꂠꂠꂠꂠꂠꂠꂠ 95.8 ꂠꂠꂠ 95.8
>>
>> (Video)
>> TestꂠꀠLatency/SD (ms) Max latencyꂠꀠ% cpuꂠꀠ% deadlines hit
>> Noneꀠ0.087 +/- 2.26 ꂠꂠꀠ95.8ꀠꂠꂠꂠꂠꂠꂠꂠ 99.8 ꂠꂠꂠ 99.8
>> Xꂠꂠꂠꀠ0.14 +/- 1.57 ꂠ ꂠꂠ 28.3 ꂠꂠꂠꂠꂠꂠꂠꀠ100 ꂠꂠꂠꀠ100
>> Burnꀠ36.7 +/- 103 ꂠꂠꂠꀠꀠ615 ꂠꂠꂠꂠꂠꂠꂠꂠ 42.6 ꂠꂠꂠ 40.9
>> Writeꀠ2.97 +/- 12 ꂠꂠꂠꂠꂠ 217 ꂠꂠꂠꂠꂠꂠꂠꂠ 90.1 ꂠꂠꂠ 87.8
>> Readꀠ0.11 +/- 0.99 ꂠꂠꂠꀠ33.8 ꂠꂠꂠꂠꂠꂠꂠꀠ99.8 ꂠꂠꂠ 99.8
>> Compile 29.8 +/- 76.2 ꂠꂠ 608 ꂠꂠꂠꂠꂠꂠꂠꂠ 46.3 ꂠꂠꀠ38.4
>> Memload 1.25 +/- 14.1 ꂠ 317 ꂠꂠꂠꂠꂠꂠꂠꂠ 95.4 ꂠꂠꂠ 94.5
>
------------------
Disabled bioqdisksort (for all requests to ordered):
noop disk scheduler
(Audio)
Test Latency/SD (ms) Max Latency % cpu % deadlines hit
None 0.03 +/- 0.0304 0.046 100 100
Video 0.034 +/- 0.0342 0.053 100 100
X 0.032 +/- 0.033 0.044 100 100
Burn 0.039 +/- 0.04 0.058 100 100
Write 3.05 +/- 13.2 129 98.5 98.1
Read 0.089 +/- 0.247 4.2 100 100
Compile 5.2 +/- 18 150 97.6 97.4
Memload 3.75 +/- 36.4 702 95.8 95.8
(video)
None 0.032 +/- 0.0328 0.076 100 100
X 0.066 +/- 0.91 27.4 100 99.9
Burn 36.4 +/- 104 772 43 41.3
Write 3.13 +/- 12.7 182 89.7 87.6
Read 0.084 +/- 0.131 392 100 100
Compile 29.7 +/- 77.3 510 47.4 42.4
Memload 1.3 +/- 18.4 583 95.1 94.3
FQ disk scheduler
(Audio)
None 0.031 +/- 0.0322 0.122 100 100
Video 0.057 +/- 0.467 11.4 100 100
X 0.034 +/- 0.0345 0.076 100 100
Burn 0.038 +/- 0.039 0.125 100 100
Write 2.63 +/- 13.4 225 99.8 98.7
Read 0.085 +/- 0.225 5.03 100 100
Compile 1.77 +/ 7.83 116 99.7 99.7
Memload 2.34 +/- 22.5 350 95.6 95.6
(Video)
None 0.057 +/- 0.741 26.6 100 100
X 0.046 +/- 0.396 16.7 100 99.9
Burn 38.6 +/- 106 610 42.4 40.7
Write 3.28 +/- 11.5 113 94.3 90
Read 0.086 +/- 0.181 5.01 100 100
Compile 31.3 +/- 85.2 739 46.8 41.3
Memload 2.17 +/- 28.1 673 94.5 92.7
-- vs
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