Re: [RFC,PATCH] VMWARE faults on accessing disabled counters

2016-08-31 Thread Peter Zijlstra
On Wed, Aug 31, 2016 at 03:19:24PM +0200, Jiri Olsa wrote: > > I guess if real HW does not fault on this we dont need to bother, > and treat it as the VMWARE issue.. but I couldn't find this info > So I've once had a machine that backlisted one entry, but I've forgotten what machine that was. Bu

Re: [RFC,PATCH] VMWARE faults on accessing disabled counters

2016-08-31 Thread Jiri Olsa
On Wed, Aug 31, 2016 at 03:11:04PM +0200, Peter Zijlstra wrote: > On Wed, Aug 31, 2016 at 02:03:58PM +0200, Jiri Olsa wrote: > > hi, > > when booting under VMWARE we've got following dmesg lines: > > > > [0.051567] perf_event_intel: CPUID marked event: 'cpu cycles' > > unavailable > > [0.

Re: [RFC,PATCH] VMWARE faults on accessing disabled counters

2016-08-31 Thread Peter Zijlstra
On Wed, Aug 31, 2016 at 02:03:58PM +0200, Jiri Olsa wrote: > hi, > when booting under VMWARE we've got following dmesg lines: > > [0.051567] perf_event_intel: CPUID marked event: 'cpu cycles' unavailable > [0.051567] perf_event_intel: CPUID marked event: 'instructions' > unavailable > [