New low latency kernel flavour (was "Lucid server flavour RFC")

[Louie Queral]

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
>
> --
> Ubuntu-Studio-devel mailing list
> Ubuntu-Studio-devel at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://lists.ubuntu.com/archives/ubuntu-studio-devel/attachments/20100129/3a376bbb/attachment-0001.htm