| Message ID | 20200811053505.21223-1-leo.yan@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: perf: Add general hardware LLC events for PMUv3 | expand |
On Tue, 11 Aug 2020 13:35:05 +0800, Leo Yan wrote: > This patch is to add the general hardware last level cache (LLC) events > for PMUv3: one event is for LLC access and another is for LLC miss. > > With this change, perf tool can support last level cache profiling, > below is an example to demonstrate the usage on Arm64: > > $ perf stat -e LLC-load-misses -e LLC-loads -- \ > perf bench mem memcpy -s 1024MB -l 100 -f default > > [...] Applied to will (for-next/perf), thanks! [1/1] arm64: perf: Add general hardware LLC events for PMUv3 https://git.kernel.org/will/c/ffdbd3d83553 Cheers,
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 462f9a9cc44b..86e2328b0c2e 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -69,6 +69,9 @@ static const unsigned armv8_pmuv3_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] [C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL, [C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB, + [C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_LL_CACHE_MISS_RD, + [C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_LL_CACHE_RD, + [C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED, [C(BPU)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_BR_MIS_PRED, };
This patch is to add the general hardware last level cache (LLC) events for PMUv3: one event is for LLC access and another is for LLC miss. With this change, perf tool can support last level cache profiling, below is an example to demonstrate the usage on Arm64: $ perf stat -e LLC-load-misses -e LLC-loads -- \ perf bench mem memcpy -s 1024MB -l 100 -f default [...] Performance counter stats for 'perf bench mem memcpy -s 1024MB -l 100 -f default': 35,534,262 LLC-load-misses # 2.16% of all LL-cache hits 1,643,946,443 LLC-loads [...] Signed-off-by: Leo Yan <leo.yan@linaro.org> --- arch/arm64/kernel/perf_event.c | 3 +++ 1 file changed, 3 insertions(+)