On Sat, 9 Jul 2016 19:32:35 +0900 Itaru Kitayama <itaru.kitayama@xxxxxxxx> wrote: > On 7/9/16 7:08 PM, Marc Zyngier wrote: > > Please realize that this is a work in progress, and that I'm not even > > sure I want to upstream this. > > OK. > > >> (I wanted to get some performance statistics of the new feature with > >> perf, but on arm64 most of them are unsupported) > > > > Care to mention which ones are missing? > > $ perf stat sleep 5 > > Performance counter stats for 'sleep 5': > > 0.589480 task-clock:u (msec) # 0.000 CPUs > utilized > 0 context-switches:u # 0.000 K/sec > > 0 cpu-migrations:u # 0.000 K/sec > > 35 page-faults:u # 0.059 M/sec > > <not supported> cycles:u > > <not supported> instructions:u > > <not supported> branches:u > > <not supported> branch-misses:u > > > 5.024683421 seconds time elapsed > > Userland is Fedora 24. I'm pretty sure your QEMU doesn't have PMU support. Can you show the PMU probe messages in the guest? And/or dump the guest DTB? Thanks, M. -- Jazz is not dead. It just smells funny. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
