Messages in this thread Patch in this message | | | From | Stephane Eranian <> | Subject | [PATCH 3/4] perf/x86: fix data source encoding issues for load latency/precise store | Date | Fri, 8 Aug 2014 22:40:51 +0200 |
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This patch fixes issues introuduce by Andi's previous patch 'Revamp PEBS' series.
This patch fixes the following: - 0 is not a valid init value for data source. Define PERF_MEM_NA as the default value
- precise_store_data_hsw() encode the mem op type whenever we can - precise_store_data_hsw set the default data source correctly
Signed-off-by: Stephane Eranian <eranian@google.com> --- arch/x86/kernel/cpu/perf_event_intel_ds.c | 11 +++++++---- include/linux/perf_event.h | 9 ++++++++- 2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index a9b60f3..67919ce 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -113,9 +113,12 @@ static u64 precise_store_data_hsw(struct perf_event *event, u64 status) union perf_mem_data_src dse; u64 cfg = event->hw.config & INTEL_ARCH_EVENT_MASK; - dse.val = 0; - dse.mem_op = PERF_MEM_OP_NA; - dse.mem_lvl = PERF_MEM_LVL_NA; + dse.val = PERF_MEM_NA; + + if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW) + dse.mem_op = PERF_MEM_OP_STORE; + else if (event->hw.flags & PERF_X86_EVENT_PEBS_LD_HSW) + dse.mem_op = PERF_MEM_OP_LOAD; /* * L1 info only valid for following events: @@ -126,7 +129,7 @@ static u64 precise_store_data_hsw(struct perf_event *event, u64 status) * MEM_UOPS_RETIRED.ALL_STORES */ if (cfg != 0x12d0 && cfg != 0x22d0 && cfg != 0x42d0 && cfg != 0x82d0) - return dse.mem_lvl; + return dse.val; if (status & 1) dse.mem_lvl = PERF_MEM_LVL_L1 | PERF_MEM_LVL_HIT; diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 707617a..8b206aa 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -604,6 +604,13 @@ struct perf_sample_data { u64 txn; }; +/* default value for data source */ +#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\ + PERF_MEM_S(LVL, NA) |\ + PERF_MEM_S(SNOOP, NA) |\ + PERF_MEM_S(LOCK, NA) |\ + PERF_MEM_S(TLB, NA)) + static inline void perf_sample_data_init(struct perf_sample_data *data, u64 addr, u64 period) { @@ -616,7 +623,7 @@ static inline void perf_sample_data_init(struct perf_sample_data *data, data->regs_user.regs = NULL; data->stack_user_size = 0; data->weight = 0; - data->data_src.val = 0; + data->data_src.val = PERF_MEM_NA; data->txn = 0; } -- 1.7.9.5
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