Messages in this thread | | | Date | Tue, 16 Dec 2008 12:15:26 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 1/2] cpuacct: refactoring cpuusage_read / cpuusage_write |
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* Ken Chen <kenchen@google.com> wrote:
> In the thread regarding to 'export percpu cpuacct cgroup stats' > http://lkml.org/lkml/2008/12/7/13 > > akpm pointed out that current cpuacct code is inefficient. This patch > refactoring the following: > > * make cpu_rq locking only on 32-bit > * change iterator to each_present_cpu instead of each_possible_cpu to > make it hotplug friendly. > > It's a bit of code churn, but I was rewarded with 160 byte code size saving > on x86-64 arch and zero code size change on i386.
applied to tip/sched/core, thanks Ken!
Ingo
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