From d7d213e04cf83318681f24870f1144e50d5c91bb Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Wed, 4 Jan 2023 12:13:48 -0800 Subject: [PATCH] perf report: Support Retire Latency The Retire Latency field is added in the var3_w of the PERF_SAMPLE_WEIGHT_STRUCT. The Retire Latency reports pipeline stall of this instruction compared to the previous instruction in cycles. That's quite useful to display the information with perf mem report. The p_stage_cyc for Power is also from the var3_w. Union the p_stage_cyc and retire_lat to share the code. Implement X86 specific codes to display the X86 specific header. Add a new sort key retire_lat for the Retire Latency. Reviewed-by: Andi Kleen Signed-off-by: Kan Liang Cc: Ian Rogers Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20230104201349.1451191-8-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-report.txt | 2 ++ tools/perf/arch/x86/util/event.c | 20 ++++++++++++++++++++ tools/perf/util/sample.h | 5 ++++- tools/perf/util/sort.c | 2 ++ tools/perf/util/sort.h | 2 ++ 5 files changed, 30 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 9b0c0dbf9a77..c242e8da6b1a 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -115,6 +115,8 @@ OPTIONS - p_stage_cyc: On powerpc, this presents the number of cycles spent in a pipeline stage. And currently supported only on powerpc. - addr: (Full) virtual address of the sampled instruction + - retire_lat: On X86, this reports pipeline stall of this instruction compared + to the previous instruction in cycles. And currently supported only on X86 By default, comm, dso and symbol keys are used. (i.e. --sort comm,dso,symbol) diff --git a/tools/perf/arch/x86/util/event.c b/tools/perf/arch/x86/util/event.c index a3acefe6d0c6..37b3feb53e8d 100644 --- a/tools/perf/arch/x86/util/event.c +++ b/tools/perf/arch/x86/util/event.c @@ -89,6 +89,7 @@ void arch_perf_parse_sample_weight(struct perf_sample *data, else { data->weight = weight.var1_dw; data->ins_lat = weight.var2_w; + data->retire_lat = weight.var3_w; } } @@ -102,3 +103,22 @@ void arch_perf_synthesize_sample_weight(const struct perf_sample *data, *array |= ((u64)data->ins_lat << 32); } } + +const char *arch_perf_header_entry(const char *se_header) +{ + if (!strcmp(se_header, "Local Pipeline Stage Cycle")) + return "Local Retire Latency"; + else if (!strcmp(se_header, "Pipeline Stage Cycle")) + return "Retire Latency"; + + return se_header; +} + +int arch_support_sort_key(const char *sort_key) +{ + if (!strcmp(sort_key, "p_stage_cyc")) + return 1; + if (!strcmp(sort_key, "local_p_stage_cyc")) + return 1; + return 0; +} diff --git a/tools/perf/util/sample.h b/tools/perf/util/sample.h index 60ec79d4eea4..33b08e0ac746 100644 --- a/tools/perf/util/sample.h +++ b/tools/perf/util/sample.h @@ -92,7 +92,10 @@ struct perf_sample { u8 cpumode; u16 misc; u16 ins_lat; - u16 p_stage_cyc; + union { + u16 p_stage_cyc; + u16 retire_lat; + }; bool no_hw_idx; /* No hw_idx collected in branch_stack */ char insn[MAX_INSN]; void *raw_data; diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index d7d0f997873a..4a648231fe72 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -2133,6 +2133,8 @@ static struct sort_dimension common_sort_dimensions[] = { DIM(SORT_LOCAL_PIPELINE_STAGE_CYC, "local_p_stage_cyc", sort_local_p_stage_cyc), DIM(SORT_GLOBAL_PIPELINE_STAGE_CYC, "p_stage_cyc", sort_global_p_stage_cyc), DIM(SORT_ADDR, "addr", sort_addr), + DIM(SORT_LOCAL_RETIRE_LAT, "local_retire_lat", sort_local_p_stage_cyc), + DIM(SORT_GLOBAL_RETIRE_LAT, "retire_lat", sort_global_p_stage_cyc), }; #undef DIM diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h index 921715e6aec4..9a91d0df2833 100644 --- a/tools/perf/util/sort.h +++ b/tools/perf/util/sort.h @@ -237,6 +237,8 @@ enum sort_type { SORT_LOCAL_PIPELINE_STAGE_CYC, SORT_GLOBAL_PIPELINE_STAGE_CYC, SORT_ADDR, + SORT_LOCAL_RETIRE_LAT, + SORT_GLOBAL_RETIRE_LAT, /* branch stack specific sort keys */ __SORT_BRANCH_STACK,