Messages in this thread | | | Date | Mon, 28 Aug 2017 13:41:14 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH] perf record: enable multiplexing scaling via -R |
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> So I think we are good to go. to capture multiplexing scaling factor > when sampling simply use the S > modifier. > But to my surprise, newer kernels are not happy with the cmdline: > $ perf record -e cycles:S noploop 1 > Error: > The sys_perf_event_open() syscall returned with 22 (Invalid argument) > for event (cycles:Su). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured?
Likely due to
ba5213ae6b88 perf/core: Correct event creation with PERF_FORMAT_GROUP
It's not supported with inherited events.
-Andi
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