[PATCH 2/2] arm64: perf: Add event descriptions

From: Drew Richardson
Date: Thu Oct 22 2015 - 10:06:54 EST

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Add additional information about the ARM architected hardware events
to make counters self describing. This makes the hardware PMUs easier
to use as perf list contains possible events instead of users having
to refer to documentation like the ARM TRMs.

Signed-off-by: Drew Richardson <drew.richardson@xxxxxxx>
---
arch/arm64/kernel/perf_event.c | 138 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 138 insertions(+)

diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 7e4372ee4dfb..d880e9cf058b 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -53,6 +53,8 @@
#define ARMV8_PMUV3_PERFCTR_PC_PROC_RETURN 0x0E
#define ARMV8_PMUV3_PERFCTR_MEM_UNALIGNED_ACCESS 0x0F
#define ARMV8_PMUV3_PERFCTR_TTBR_WRITE 0x1C
+#define ARMV8_PMUV3_PERFCTR_CHAIN 0x1E
+#define ARMV8_PMUV3_PERFCTR_BR_RETIRED 0x21

/* Common microarchitectural events. */
#define ARMV8_PMUV3_PERFCTR_L1_ICACHE_REFILL 0x01
@@ -67,6 +69,23 @@
#define ARMV8_PMUV3_PERFCTR_BUS_ACCESS 0x19
#define ARMV8_PMUV3_PERFCTR_MEM_ERROR 0x1A
#define ARMV8_PMUV3_PERFCTR_BUS_CYCLES 0x1D
+#define ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE 0x1F
+#define ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE 0x20
+#define ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED 0x22
+#define ARMV8_PMUV3_PERFCTR_STALL_FRONTEND 0x23
+#define ARMV8_PMUV3_PERFCTR_STALL_BACKEND 0x24
+#define ARMV8_PMUV3_PERFCTR_L1D_TLB 0x25
+#define ARMV8_PMUV3_PERFCTR_L1I_TLB 0x26
+#define ARMV8_PMUV3_PERFCTR_L2I_CACHE 0x27
+#define ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL 0x28
+#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE 0x29
+#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL 0x2A
+#define ARMV8_PMUV3_PERFCTR_L3D_CACHE 0x2B
+#define ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB 0x2C
+#define ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL 0x2D
+#define ARMV8_PMUV3_PERFCTR_L21_TLB_REFILL 0x2E
+#define ARMV8_PMUV3_PERFCTR_L2D_TLB 0x2F
+#define ARMV8_PMUV3_PERFCTR_L21_TLB 0x30

/* ARMv8 Cortex-A53 specific event types. */
#define ARMV8_A53_PERFCTR_PREFETCH_LINEFILL 0xC2
@@ -173,6 +192,123 @@ static const unsigned armv8_a57_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
[C(BPU)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED,
};

+#define ARMV8_EVENT_ATTR_RESOLVE(m) #m
+#define ARMV8_EVENT_ATTR(name, config) \
+ PMU_EVENT_ATTR_STRING(name, armv8_event_attr_##name, \
+ "event=" ARMV8_EVENT_ATTR_RESOLVE(config))
+
+ARMV8_EVENT_ATTR(sw_incr, ARMV8_PMUV3_PERFCTR_PMNC_SW_INCR);
+ARMV8_EVENT_ATTR(l1i_cache_refill, ARMV8_PMUV3_PERFCTR_L1_ICACHE_REFILL);
+ARMV8_EVENT_ATTR(l1i_tlb_refill, ARMV8_PMUV3_PERFCTR_ITLB_REFILL);
+ARMV8_EVENT_ATTR(l1d_cache_refill, ARMV8_PMUV3_PERFCTR_L1_DCACHE_REFILL);
+ARMV8_EVENT_ATTR(l1d_cache, ARMV8_PMUV3_PERFCTR_L1_DCACHE_ACCESS);
+ARMV8_EVENT_ATTR(l1d_tlb_refill, ARMV8_PMUV3_PERFCTR_DTLB_REFILL);
+ARMV8_EVENT_ATTR(ld_retired, ARMV8_PMUV3_PERFCTR_MEM_READ);
+ARMV8_EVENT_ATTR(st_retired, ARMV8_PMUV3_PERFCTR_MEM_WRITE);
+ARMV8_EVENT_ATTR(inst_retired, ARMV8_PMUV3_PERFCTR_INSTR_EXECUTED);
+ARMV8_EVENT_ATTR(exc_taken, ARMV8_PMUV3_PERFCTR_EXC_TAKEN);
+ARMV8_EVENT_ATTR(exc_return, ARMV8_PMUV3_PERFCTR_EXC_EXECUTED);
+ARMV8_EVENT_ATTR(cid_write_retired, ARMV8_PMUV3_PERFCTR_CID_WRITE);
+ARMV8_EVENT_ATTR(pc_write_retired, ARMV8_PMUV3_PERFCTR_PC_WRITE);
+ARMV8_EVENT_ATTR(br_immed_retired, ARMV8_PMUV3_PERFCTR_PC_IMM_BRANCH);
+ARMV8_EVENT_ATTR(br_return_retired, ARMV8_PMUV3_PERFCTR_PC_PROC_RETURN);
+ARMV8_EVENT_ATTR(unaligned_ldst_retired, ARMV8_PMUV3_PERFCTR_MEM_UNALIGNED_ACCESS);
+ARMV8_EVENT_ATTR(br_mis_pred, ARMV8_PMUV3_PERFCTR_PC_BRANCH_MIS_PRED);
+ARMV8_EVENT_ATTR(cpu_cycles, ARMV8_PMUV3_PERFCTR_CLOCK_CYCLES);
+ARMV8_EVENT_ATTR(br_pred, ARMV8_PMUV3_PERFCTR_PC_BRANCH_PRED);
+ARMV8_EVENT_ATTR(mem_access, ARMV8_PMUV3_PERFCTR_MEM_ACCESS);
+ARMV8_EVENT_ATTR(l1i_cache, ARMV8_PMUV3_PERFCTR_L1_ICACHE_ACCESS);
+ARMV8_EVENT_ATTR(l1d_cache_wb, ARMV8_PMUV3_PERFCTR_L1_DCACHE_WB);
+ARMV8_EVENT_ATTR(l2d_cache, ARMV8_PMUV3_PERFCTR_L2_CACHE_ACCESS);
+ARMV8_EVENT_ATTR(l2d_cache_refill, ARMV8_PMUV3_PERFCTR_L2_CACHE_REFILL);
+ARMV8_EVENT_ATTR(l2d_cache_wb, ARMV8_PMUV3_PERFCTR_L2_CACHE_WB);
+ARMV8_EVENT_ATTR(bus_access, ARMV8_PMUV3_PERFCTR_BUS_ACCESS);
+ARMV8_EVENT_ATTR(memory_error, ARMV8_PMUV3_PERFCTR_MEM_ERROR);
+ARMV8_EVENT_ATTR(inst_spec, ARMV8_PMUV3_PERFCTR_OP_SPEC);
+ARMV8_EVENT_ATTR(ttbr_write_retired, ARMV8_PMUV3_PERFCTR_TTBR_WRITE);
+ARMV8_EVENT_ATTR(bus_cycles, ARMV8_PMUV3_PERFCTR_BUS_CYCLES);
+ARMV8_EVENT_ATTR(chain, ARMV8_PMUV3_PERFCTR_CHAIN);
+ARMV8_EVENT_ATTR(l1d_cache_allocate, ARMV8_PMUV3_PERFCTR_L1D_CACHE_ALLOCATE);
+ARMV8_EVENT_ATTR(l2d_cache_allocate, ARMV8_PMUV3_PERFCTR_L2D_CACHE_ALLOCATE);
+ARMV8_EVENT_ATTR(br_retired, ARMV8_PMUV3_PERFCTR_BR_RETIRED);
+ARMV8_EVENT_ATTR(br_mis_pred_retired, ARMV8_PMUV3_PERFCTR_BR_MIS_PRED_RETIRED);
+ARMV8_EVENT_ATTR(stall_frontend, ARMV8_PMUV3_PERFCTR_STALL_FRONTEND);
+ARMV8_EVENT_ATTR(stall_backend, ARMV8_PMUV3_PERFCTR_STALL_BACKEND);
+ARMV8_EVENT_ATTR(l1d_tlb, ARMV8_PMUV3_PERFCTR_L1D_TLB);
+ARMV8_EVENT_ATTR(l1i_tlb, ARMV8_PMUV3_PERFCTR_L1I_TLB);
+ARMV8_EVENT_ATTR(l2i_cache, ARMV8_PMUV3_PERFCTR_L2I_CACHE);
+ARMV8_EVENT_ATTR(l2i_cache_refill, ARMV8_PMUV3_PERFCTR_L2I_CACHE_REFILL);
+ARMV8_EVENT_ATTR(l3d_cache_allocate, ARMV8_PMUV3_PERFCTR_L3D_CACHE_ALLOCATE);
+ARMV8_EVENT_ATTR(l3d_cache_refill, ARMV8_PMUV3_PERFCTR_L3D_CACHE_REFILL);
+ARMV8_EVENT_ATTR(l3d_cache, ARMV8_PMUV3_PERFCTR_L3D_CACHE);
+ARMV8_EVENT_ATTR(l3d_cache_wb, ARMV8_PMUV3_PERFCTR_L3D_CACHE_WB);
+ARMV8_EVENT_ATTR(l2d_tlb_refill, ARMV8_PMUV3_PERFCTR_L2D_TLB_REFILL);
+ARMV8_EVENT_ATTR(l21_tlb_refill, ARMV8_PMUV3_PERFCTR_L21_TLB_REFILL);
+ARMV8_EVENT_ATTR(l2d_tlb, ARMV8_PMUV3_PERFCTR_L2D_TLB);
+ARMV8_EVENT_ATTR(l21_tlb, ARMV8_PMUV3_PERFCTR_L21_TLB);
+
+static struct attribute *armv8_pmuv3_event_attrs[] = {
+ &armv8_event_attr_sw_incr.attr.attr,
+ &armv8_event_attr_l1i_cache_refill.attr.attr,
+ &armv8_event_attr_l1i_tlb_refill.attr.attr,
+ &armv8_event_attr_l1d_cache_refill.attr.attr,
+ &armv8_event_attr_l1d_cache.attr.attr,
+ &armv8_event_attr_l1d_tlb_refill.attr.attr,
+ &armv8_event_attr_ld_retired.attr.attr,
+ &armv8_event_attr_st_retired.attr.attr,
+ &armv8_event_attr_inst_retired.attr.attr,
+ &armv8_event_attr_exc_taken.attr.attr,
+ &armv8_event_attr_exc_return.attr.attr,
+ &armv8_event_attr_cid_write_retired.attr.attr,
+ &armv8_event_attr_pc_write_retired.attr.attr,
+ &armv8_event_attr_br_immed_retired.attr.attr,
+ &armv8_event_attr_br_return_retired.attr.attr,
+ &armv8_event_attr_unaligned_ldst_retired.attr.attr,
+ &armv8_event_attr_br_mis_pred.attr.attr,
+ &armv8_event_attr_cpu_cycles.attr.attr,
+ &armv8_event_attr_br_pred.attr.attr,
+ &armv8_event_attr_mem_access.attr.attr,
+ &armv8_event_attr_l1i_cache.attr.attr,
+ &armv8_event_attr_l1d_cache_wb.attr.attr,
+ &armv8_event_attr_l2d_cache.attr.attr,
+ &armv8_event_attr_l2d_cache_refill.attr.attr,
+ &armv8_event_attr_l2d_cache_wb.attr.attr,
+ &armv8_event_attr_bus_access.attr.attr,
+ &armv8_event_attr_memory_error.attr.attr,
+ &armv8_event_attr_inst_spec.attr.attr,
+ &armv8_event_attr_ttbr_write_retired.attr.attr,
+ &armv8_event_attr_bus_cycles.attr.attr,
+ &armv8_event_attr_chain.attr.attr,
+ &armv8_event_attr_l1d_cache_allocate.attr.attr,
+ &armv8_event_attr_l2d_cache_allocate.attr.attr,
+ &armv8_event_attr_br_retired.attr.attr,
+ &armv8_event_attr_br_mis_pred_retired.attr.attr,
+ &armv8_event_attr_stall_frontend.attr.attr,
+ &armv8_event_attr_stall_backend.attr.attr,
+ &armv8_event_attr_l1d_tlb.attr.attr,
+ &armv8_event_attr_l1i_tlb.attr.attr,
+ &armv8_event_attr_l2i_cache.attr.attr,
+ &armv8_event_attr_l2i_cache_refill.attr.attr,
+ &armv8_event_attr_l3d_cache_allocate.attr.attr,
+ &armv8_event_attr_l3d_cache_refill.attr.attr,
+ &armv8_event_attr_l3d_cache.attr.attr,
+ &armv8_event_attr_l3d_cache_wb.attr.attr,
+ &armv8_event_attr_l2d_tlb_refill.attr.attr,
+ &armv8_event_attr_l21_tlb_refill.attr.attr,
+ &armv8_event_attr_l2d_tlb.attr.attr,
+ &armv8_event_attr_l21_tlb.attr.attr,
+ NULL
+};
+
+static struct attribute_group armv8_pmuv3_events_attr_group = {
+ .name = "events",
+ .attrs = armv8_pmuv3_event_attrs,
+};
+
+static const struct attribute_group *armv8_pmuv3_attr_groups[] = {
+ &armv8_pmuv3_events_attr_group,
+ NULL
+};

/*
* Perf Events' indices
@@ -641,6 +777,7 @@ static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
armv8_pmu_init(cpu_pmu);
cpu_pmu->name = "armv8_cortex_a53";
cpu_pmu->map_event = armv8_a53_map_event;
+ cpu_pmu->pmu.attr_groups = armv8_pmuv3_attr_groups;
return armv8pmu_probe_num_events(cpu_pmu);
}

@@ -649,6 +786,7 @@ static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
armv8_pmu_init(cpu_pmu);
cpu_pmu->name = "armv8_cortex_a57";
cpu_pmu->map_event = armv8_a57_map_event;
+ cpu_pmu->pmu.attr_groups = armv8_pmuv3_attr_groups;
return armv8pmu_probe_num_events(cpu_pmu);
}

--
2.1.4

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Next message: Tejun Heo: "Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks"
Previous message: Drew Richardson: "[PATCH 1/2] arm64: perf: Convert event enums to #defines"
In reply to: Drew Richardson: "[PATCH 1/2] arm64: perf: Convert event enums to #defines"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]