Re: [perf] unchecked MSR access error: WRMSR to 0x689 in intel_pmu_lbr_restore

[Pawan Gupta]

On Tue, Jul 12, 2022 at 03:39:56PM -0400, Vince Weaver wrote:
> On Mon, 11 Jul 2022, Pawan Gupta wrote:
>
> > Output of below would be helpful:
> >
> > # grep "rtm\|hle" /proc/cpuinfo
>
> no results
>
> > ARCH_CAP
> > # rdmsr 0x10a
>
> rdmsr: CPU 0 cannot read MSR 0x0000010a
>
> > TSX_CTRL
> > # rdmsr 0x122
>
> rdmsr: CPU 0 cannot read MSR 0x00000122
>
> > MCU_OPT_CTRL
> > # rdmsr 0x123
>
> 0
>
> > TSX_FORCE_ABORT
> > # rdmsr 0x10f
>
> rdmsr: CPU 0 cannot read MSR 0x0000010f

It appears this CPU does not support TSX feature (or disabling TSX). If
the bug is easy to reproduce, bisecting can help.

Thanks,
Pawan