Hi Vincent, > On 5 February 2013 08:05, Lukasz Majewski <l.majew...@samsung.com> > wrote: > > Hi Vincent, > > > >> Hi Lukasz, > >> > >> I still need to get figures for the cover letter of the V3 of > >> packing small tasks patches. Nevertheless, the patches series is > >> available here: > >> http://git.linaro.org/gitweb?p=people/vingu/kernel.git;a=shortlog;h=refs/heads/sched-pack-small-tasks-v3 > >> > > > > Thanks for sharing code. I will look to it (and test) and provide > > feedback. > > > > Hi Lucasz, > > I have just found that a part of the 1st patch of packing small tasks > (Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for > load-tracking") has disappeared during my rebase and push on my git > tree. The consequence is that the branch sched-pack-small-tasks-v3 > only working if CONFIG_FAIR_GROUP_SCHED is set in your kernel. I have > pushed a new branch with the fixed > http://git.linaro.org/gitweb?p=people/vingu/kernel.git;a=shortlog;h=refs/heads/sched-pack-small-tasks-v3-fixed >
I've applied the code to our development 3.8 kernel. It seems to work. On the other hand I'm wondering about the best set of tests. Currently, for basic tests I'm using preempt's-rt cyclic test suite (./cyclictest -S) with various parameters. It is good enough to see long therm system stability, but more fine grained code would be nice. On the linaro website and some big.LITTLE presentation I've found information about the linsched tool used by Linaro for validation. The newest one which I've found is (LinSched for v3.3-rc7 -> linsched-alpha): http://lwn.net/Articles/486635/ Apparently, it needs some porting to run with v3.8 linux kernel, but I'm optimistic :-) Do you use the same version? Shall I use any special tests? Thanks in advance, Lukasz p.s. I've poked around the linaro website and I didn't find the linsched code for download. Is there a plan to make it available for download? > > >> I will send the patchset to LKML as soon as I will have got all > >> figures of my tests on various platform > >> > >> Regards, > >> Vincent > >> > >> On 30 January 2013 10:23, Lukasz Majewski <l.majew...@samsung.com> > >> wrote: > >> > Hi Vincent, > >> > > >> > Thanks for a very fast response. > >> > > >> >> On 30 January 2013 09:35, Lukasz Majewski > >> >> <l.majew...@samsung.com> wrote: > >> >> > Dear All, > >> >> > > >> >> > > >> >> > I'd like to ask about the power aware scheduler development: > >> >> > > >> >> > https://blueprints.launchpad.net/linaro-power-kernel/+spec/power-aware- > >> >> > scheduler > >> >> > > >> >> > > >> >> > > >> >> > Why I'm interested? > >> >> > > >> >> > > >> >> > > >> >> > I'd like to test and further develop methods to put CPU to > >> >> > IDLE or changing its operating frequency. I'm especially > >> >> > interested in packing as much as possible tasks to a CPU and > >> >> > put the other one to deep idle (RFTS - policy). I'm also > >> >> > curious how aggressive SCHED_POLICY_POWERSAVING is going to > >> >> > be? (are there any special requirements) > >> >> > >> >> I'm going to release a v3 of packing small tasks patches this > >> >> week > >> >> > >> >> > > >> >> > > >> >> > In the above page at the "Work items 2013.01" section states > >> >> > that there is a work TODO in the "max_power and > >> >> > current_power" for DVFS. > >> >> > > >> >> > Could you share code (if available) and plans for this > >> >> > development? > >> >> > >> >> This step of the blueprint is not already done but there are RFC > >> >> patch from Chris Redpath about frequency scaling invariance that > >> >> could interest you > >> >> http://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git;a=commit;h=6af10694b3a52f47f6814480e48993b0a9cfa4ef > >> >> > >> > > >> > > >> > > >> >> Vincent > >> >> > > >> >> > > >> >> > > >> >> > I've looked to the: > >> >> > > >> >> > git://git.linaro.org/arm/big.LITTLE/mp.git tree (branch: > >> >> > power-aware- scheduling-v4), but didn't find the power related > >> >> > code (especially DVFS). > >> >> > > >> >> > > >> >> > > >> >> > Probably I've looked at wrong place, so any guidance would be > >> >> > appreciate. > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > As a side question: > >> >> > > >> >> > On the linaro-dev mailing list there are some patches for > >> >> > tuning cpufreq governor. Is there any roadmap for this effort? > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > -- > >> >> > Best regards, > >> >> > > >> >> > Lukasz Majewski > >> >> > > >> >> > Samsung R&D Poland (SRPOL) | Linux Platform Group > >> > > >> > > >> > > >> > -- > >> > Best regards, > >> > > >> > Lukasz Majewski > >> > > >> > Samsung R&D Poland (SRPOL) | Linux Platform Group > > > > > > > > -- > > Best regards, > > > > Lukasz Majewski > > > > Samsung R&D Poland (SRPOL) | Linux Platform Group -- Best regards, Lukasz Majewski Samsung R&D Poland (SRPOL) | Linux Platform Group _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
