New low latency kernel flavour (was "Lucid server flavour RFC")
Louie Queral
louiethecuban at gmail.com
Sat Jan 30 03:54:28 GMT 2010
wow these look nice, great job!
On Fri, Jan 29, 2010 at 6:45 PM, Alessio Igor Bogani <abogani at ubuntu.com>wrote:
> Hi All,
>
> 2010/1/20 Tim Gardner <tim.gardner at canonical.com>:
> > I'm considering an additional Lucid x86_64 flavour, one tuned for low
> > latency, power consumptive platforms. I've received a fair bit of
>
> I think that UbuntuStudio would really appreciate that new flavour, please
> do!
>
> I built a test "-lowlatency" kernelinto my PPA:
> http://kernel.ubuntu.com/~abogani/
>
> Anyone interested into that new kernel flavour is invited to test it
> and report result to list!
>
> I have done some "inaccurate" tests measured with cyclictest (rt-tests
> package) and with a common workload (generated with some programs:
> Totem, OpenOffice.org, Firefox, dd, ping, top, make -j2) for a couple
> of minutes. Not very reliable tests after all but they could help to
> understand the right way. Please take a look of the latests test which
> have a very good results!
>
> config.generic
> T: 0 ( 2146) P:99 I:1000 C: 58975 Min: 6 Act: 211 Avg: 150 Max:
> 357
> T: 1 ( 2147) P:98 I:1500 C: 39317 Min: 6 Act: 206 Avg: 155 Max:
> 338
> T: 2 ( 2148) P:97 I:2000 C: 29488 Min: 6 Act: 200 Avg: 144 Max:
> 358
> T: 3 ( 2149) P:96 I:2500 C: 23591 Min: 6 Act: 394 Avg: 143 Max:
> 394
> T: 4 ( 2150) P:95 I:3000 C: 19659 Min: 7 Act: 204 Avg: 140 Max:
> 318
>
> config.generic.1000hz
> T: 0 ( 2620) P:99 I:1000 C: 59012 Min: 5 Act: 37 Avg: 26 Max:
> 173
> T: 1 ( 2621) P:98 I:1500 C: 39342 Min: 4 Act: 186 Avg: 22 Max:
> 186
> T: 2 ( 2622) P:97 I:2000 C: 29507 Min: 4 Act: 130 Avg: 22 Max:
> 148
> T: 3 ( 2623) P:96 I:2500 C: 23605 Min: 4 Act: 6 Avg: 22 Max:
> 190
> T: 4 ( 2624) P:95 I:3000 C: 19671 Min: 5 Act: 7 Avg: 20 Max:
> 156
>
> config.generic.1000hz.nohz_off_via_cmdline
> T: 0 ( 2077) P:99 I:1000 C: 58989 Min: 5 Act: 197 Avg: 133 Max:
> 438
> T: 1 ( 2078) P:98 I:1500 C: 39327 Min: 5 Act: 199 Avg: 132 Max:
> 357
> T: 2 ( 2079) P:97 I:2000 C: 29495 Min: 5 Act: 194 Avg: 133 Max:
> 502
> T: 3 ( 2080) P:96 I:2500 C: 23597 Min: 6 Act: 201 Avg: 132 Max:
> 298
> T: 4 ( 2081) P:95 I:3000 C: 19664 Min: 5 Act: 194 Avg: 132 Max:
> 274
>
> config.generic.nohz_off
> T: 0 ( 2177) P:99 I:1000 C: 58975 Min: 5 Act: 81 Avg: 28 Max:
> 214
> T: 1 ( 2178) P:98 I:1500 C: 39317 Min: 5 Act: 25 Avg: 24 Max:
> 222
> T: 2 ( 2179) P:97 I:2000 C: 29488 Min: 6 Act: 20 Avg: 22 Max:
> 129
> T: 3 ( 2180) P:96 I:2500 C: 23591 Min: 6 Act: 260 Avg: 21 Max:
> 260
> T: 4 ( 2181) P:95 I:3000 C: 19659 Min: 5 Act: 22 Avg: 19 Max:
> 110
>
> config.generic.nohz_off.1000hz
> T: 0 ( 2268) P:99 I:1000 C: 59016 Min: 4 Act: 7 Avg: 28 Max:
> 171
> T: 1 ( 2269) P:98 I:1500 C: 39345 Min: 4 Act: 171 Avg: 19 Max:
> 171
> T: 2 ( 2270) P:97 I:2000 C: 29509 Min: 4 Act: 124 Avg: 22 Max:
> 346
> T: 3 ( 2271) P:96 I:2500 C: 23607 Min: 4 Act: 7 Avg: 20 Max:
> 197
> T: 4 ( 2272) P:95 I:3000 C: 19673 Min: 4 Act: 10 Avg: 23 Max:
> 104
>
> config.generic.nohz_off.1000hz.slab.preempt_rcu.preempt
> T: 0 ( 2077) P:99 I:1000 C: 58990 Min: 5 Act: 8 Avg: 28 Max:
> 164
> T: 1 ( 2078) P:98 I:1500 C: 39327 Min: 5 Act: 8 Avg: 25 Max:
> 153
> T: 2 ( 2079) P:97 I:2000 C: 29496 Min: 5 Act: 10 Avg: 19 Max:
> 120
> T: 3 ( 2080) P:96 I:2500 C: 23597 Min: 5 Act: 12 Avg: 24 Max:
> 159
> T: 4 ( 2081) P:95 I:3000 C: 19664 Min: 5 Act: 11 Avg: 22 Max:
> 143
>
> Ciao,
> Alessio
>
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