Messages in this thread | | | Subject | Re: [PATCH 1/9] Remove parent field in cpuacct cgroup | From | Peter Zijlstra <> | Date | Fri, 23 Sep 2011 16:35:26 +0200 |
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On Fri, 2011-09-23 at 13:39 +0530, Balbir Singh wrote: > >> Android makes heavy use of cpuacct as well. We invented it to do cpu > >> accounting independent of control > > > > But its a massive waste of time to have to iterate a double hierarchy, > > cache-miss heaven. > > > > By double hierarchy you mean both cpu and cpuacct?
Yes
> What if they are not mounted together?
I was asking if there was a real reason not to have that.
> > Or so people really have independent cgroups as well? I thought people > > just co-mount all this crap. > > > > Please see > http://code.google.com/p/cgroupmgr/wiki/cgroupsForAndroid > http://stackoverflow.com/questions/6814207/android-cpuacct-usage-file > > AFAIK, some versions mount cpuacct at /acct and independent of cpu cgroups
They do now, but can that be fixed? Is there a sane use-case?
Overhead really must come down of all this crap.
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