On Sat, 2012-07-07 at 01:40 +0800, Xiao Guangrong wrote: > On 07/06/2012 09:22 PM, Andrew Theurer wrote: > > On Fri, 2012-07-06 at 15:42 +0800, Xiao Guangrong wrote: > >> On 07/06/2012 05:50 AM, Andrew Theurer wrote: > >>> I, and I expect others, have a keen interest in knowing how often we > >>> exit for PLE, and also how often that includes a yielding to another > >>> vcpu. The following adds two more counters to kvmstat to track the > >>> exits and the vcpu yields. This in no way changes PLE behavior, just > >>> helps us track what's going on. > >>> > >> > >> Tracepoint is a better choice than the counters you used. :) > > > > Xiao, is kvmstat considered to be deprecated? Or are debug stats like > > this just generally favored to be processed via something like perf > > instead of debugfs? > > Andrew, please refer to Documentation/feature-removal-schedule.txt, > it says: > > What: KVM debugfs statistics > When: 2013 > Why: KVM tracepoints provide mostly equivalent information in a much more > flexible fashion. > > You can use tracepoints instead of your debugfs-counters in this patch. Great, thanks. I will work on a tracepoint based approach. > > > Should we be removing kvmstat? > > > > Some months ago, i implemented 'perf kvm-events' which can analyse kvm > events more smartly, the patchset can be found at: > https://lkml.org/lkml/2012/3/6/86 I will take a look. > > Avi said it may instead of kvmstat, but i am too busy to update this > patchset. :) > -Andrew -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
