From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> perf on KVM guests does not support the multiplier or shift even though the page has those fields. Instead, they are set to zeros. Only consider the tsc2nsec supported if one of those is non-zero. Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> --- This applies on top of: https://patchwork.kernel.org/project/linux-trace-devel/list/?series=457305 tracecmd/trace-record.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c index bebecdbd..f642a5e3 100644 --- a/tracecmd/trace-record.c +++ b/tracecmd/trace-record.c @@ -5808,7 +5808,8 @@ static int get_tsc_nsec(int *shift, int *mult) if (i < cpus) return -1; - supported = 1; + if (cpu_shift || cpu_mult) + supported = 1; out: if (supported < 0) return -1; -- 2.29.2
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