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The cpum_cf (counter facility) PMU does not support sampling events. With cpum_sf (sampling facility), a PMU for sampling CPU cycles is available. Make cpum_sf the "default" PMU for PERF_COUNT_HW_CPU_CYCLES sampling events but use the more precise cpum_cf PMU for non-sampling events. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>