* Frank Ch. Eigler <fche@xxxxxxxxxx> wrote: > Hi - > > On Tue, Mar 16, 2010 at 06:04:10PM -0500, Anthony Liguori wrote: > > [...] > > The only way to really address this is to change the interaction. > > Instead of running perf externally to qemu, we should support a perf > > command in the qemu monitor that can then tie directly to the perf > > tooling. That gives us the best possible user experience. > > To what extent could this be solved with less crossing of > isolation/abstraction layers, if the perfctr facilities were properly > virtualized? [...] Note, 'perfctr' is a different out-of-tree Linux kernel project run by someone else: it offers the /dev/perfctr special-purpose device that allows raw, unabstracted, low-level access to the PMU. I suspect the one you wanted to mention here is called 'perf' or 'perf events'. (and used to be called 'performance counters' or 'perfcounters' until it got renamed about a year ago) Thanks, Ingo -- 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
