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Files

Leo Yan e50b291fbb perf arm-spe: Report error if set frequency

When users set the parameter '-F' to specify frequency for Arm SPE, the
tool reports error:

  perf record -F 1000 -e arm_spe_0// -- sleep 1
  Error:
  Invalid event (arm_spe_0//) in per-thread mode, enable system wide with '-a'.

The output logs are confused and it does not give the correct reminding.
Arm SPE does not support frequency setting given it adopts a statistical
based approach.

Alternatively, Arm SPE supports setting period.  This commit adds a
for frequency setting.  It reports error and reminds users to set period
instead.

After:

  perf record -F 1000 -e arm_spe_0// -- sleep 1
  Arm SPE: Frequency is not supported. Set period with -c option or PMU parameter (-e arm_spe_0/period=NUM/).

Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250227085544.2154136-1-leo.yan@arm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

2025-02-28 10:09:03 -08:00

arm64_exception_types.h

perf kvm: Add kvm-stat for arm64

2020-11-04 09:42:41 -03:00

arm-spe.c

perf arm-spe: Report error if set frequency

2025-02-28 10:09:03 -08:00

Build

perf arm64: Remove dwarf-regs.c

2024-11-09 08:39:13 -08:00

header.c

perf header: Pass a perf_cpu rather than a PMU to get_cpuid_str