From: Athira Rajeev Date: Tue, 16 Sep 2025 05:25:36 +0000 (+0530) Subject: perf script: Enable to present DTL entries X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a0dfb18f7d20ae0b7b5f513fd65882af105bb771;p=users%2Fhch%2Fmisc.git perf script: Enable to present DTL entries The process_event() function in "builtin-script.c" invokes perf_sample__fprintf_synth() for displaying PERF_TYPE_SYNTH type events. if (attr->type == PERF_TYPE_SYNTH && PRINT_FIELD(SYNTH)) perf_sample__fprintf_synth(sample, evsel, fp); perf_sample__fprintf_synth() process the sample depending on the value in evsel->core.attr.config. Introduce perf_sample__fprintf_synth_vpadtl() and invoke this for PERF_SYNTH_POWERPC_VPA_DTL Sample output: ./perf record -a -e sched:*,vpa_dtl/dtl_all/ -c 1000000000 sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.300 MB perf.data ] ./perf script perf 13322 [002] 233.835807: sched:sched_switch: perf:13322 [120] R ==> migration/2:27 [0] migration/2 27 [002] 233.835811: sched:sched_migrate_task: comm=perf pid=13322 prio=120 orig_cpu=2 dest_cpu=3 migration/2 27 [002] 233.835818: sched:sched_stat_runtime: comm=migration/2 pid=27 runtime=9214 [ns] migration/2 27 [002] 233.835819: sched:sched_switch: migration/2:27 [0] S ==> swapper/2:0 [120] swapper 0 [002] 233.835822: vpa-dtl: timebase: 338954486062657 dispatch_reason:decrementer_interrupt, preempt_reason:H_CEDE, enqueue_to_dispatch_time:435, ready_to_enqueue_time:0, waiting_to_ready_time:34775058, processor_id: 202 c0000000000f8094 plpar_hcall_norets_notrace+0x18 ([kernel.kallsyms]) swapper 0 [001] 233.835886: vpa-dtl: timebase: 338954486095398 dispatch_reason:priv_doorbell, preempt_reason:H_CEDE, enqueue_to_dispatch_time:542, ready_to_enqueue_time:0, waiting_to_ready_time:1245360, processor_id: 201 c0000000000f8094 plpar_hcall_norets_notrace+0x18 ([kernel.kallsyms]) Reviewed-by: Adrian Hunter Signed-off-by: Athira Rajeev Tested-by: Tejas Manhas Tested-by: Venkat Rao Bagalkote Cc: Aboorva Devarajan Cc: Aditya Bodkhe Cc: Hari Bathini Cc: Ian Rogers Cc: Jiri Olsa Cc: Madhavan Srinivasan Cc: Namhyung Kim Cc: Shrikanth Hegde Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index f731b6de7f23..9d45d459b9da 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -43,6 +43,7 @@ #include #include #include +#include #include #include "asm/bug.h" #include "util/mem-events.h" @@ -2003,6 +2004,33 @@ static int perf_sample__fprintf_synth_iflag_chg(struct perf_sample *sample, FILE return len + perf_sample__fprintf_pt_spacing(len, fp); } +#ifdef HAVE_AUXTRACE_SUPPORT +static int perf_sample__fprintf_synth_vpadtl(struct perf_sample *data, FILE *fp) +{ + struct powerpc_vpadtl_entry *dtl = (struct powerpc_vpadtl_entry *)data->raw_data; + int len; + + len = fprintf(fp, "timebase: %" PRIu64 " dispatch_reason:%s, preempt_reason:%s,\n" + "enqueue_to_dispatch_time:%d, ready_to_enqueue_time:%d," + "waiting_to_ready_time:%d, processor_id: %d", + get_unaligned_be64(&dtl->timebase), + dispatch_reasons[dtl->dispatch_reason], + preempt_reasons[dtl->preempt_reason], + be32_to_cpu(dtl->enqueue_to_dispatch_time), + be32_to_cpu(dtl->ready_to_enqueue_time), + be32_to_cpu(dtl->waiting_to_ready_time), + be16_to_cpu(dtl->processor_id)); + + return len; +} +#else +static int perf_sample__fprintf_synth_vpadtl(struct perf_sample *data __maybe_unused, + FILE *fp __maybe_unused) +{ + return 0; +} +#endif + static int perf_sample__fprintf_synth(struct perf_sample *sample, struct evsel *evsel, FILE *fp) { @@ -2025,6 +2053,8 @@ static int perf_sample__fprintf_synth(struct perf_sample *sample, return perf_sample__fprintf_synth_evt(sample, fp); case PERF_SYNTH_INTEL_IFLAG_CHG: return perf_sample__fprintf_synth_iflag_chg(sample, fp); + case PERF_SYNTH_POWERPC_VPA_DTL: + return perf_sample__fprintf_synth_vpadtl(sample, fp); default: break; } diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 7e0e58979e9c..64c63b59d617 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -271,6 +271,9 @@ struct powerpc_vpadtl_entry { u64 srr1; }; +extern const char *dispatch_reasons[11]; +extern const char *preempt_reasons[10]; + static inline void *perf_synth__raw_data(void *p) { return p + 4;