Enable perf script to present the DTL entries. Process the
dispatch trace log details in arch_perf_sample__fprintf_synth_evt()
defined in buiultin-script.c file for config value:
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])
Signed-off-by: Athira Rajeev <atraj...@linux.ibm.com>
---
tools/perf/builtin-script.c | 23 +++++++++++++++++++++--
tools/perf/util/powerpc-vpadtl.c | 16 ----------------
tools/perf/util/powerpc-vpadtl.h | 19 +++++++++++++++++++
3 files changed, 40 insertions(+), 18 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index eff584735980..a0faadaadc4d 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -66,6 +66,7 @@
#include "util/cgroup.h"
#include "util/annotate.h"
#include "perf.h"
+#include "util/powerpc-vpadtl.h"
#include <linux/ctype.h>
#ifdef HAVE_LIBTRACEEVENT
@@ -2004,8 +2005,26 @@ static int perf_sample__fprintf_synth_iflag_chg(struct
perf_sample *sample, FILE
}
static void arch_perf_sample__fprintf_synth_evt(struct perf_sample *data
__maybe_unused,
- FILE *fp __maybe_unused, u64 config __maybe_unused)
+ FILE *fp __maybe_unused, u64 config __maybe_unused, struct
perf_env *env)
{
+ const char *arch = perf_env__arch(env);
+
+ if (!strcmp("powerpc", arch)) {
+ struct dtl_entry *dtl = (struct dtl_entry *)data->raw_data;
+
+ if (config != PERF_SYNTH_POWERPC_VPA_DTL)
+ return;
+ fprintf(fp, "timebase: %" PRIu64 "dispatch_reason:%s,
preempt_reason:%s, enqueue_to_dispatch_time:%d,\
+ ready_to_enqueue_time:%d,
waiting_to_ready_time:%d, processor_id: %d",\
+ be64_to_cpu(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;
}
@@ -2032,7 +2051,7 @@ static int perf_sample__fprintf_synth(struct perf_sample
*sample,
case PERF_SYNTH_INTEL_IFLAG_CHG:
return perf_sample__fprintf_synth_iflag_chg(sample, fp);
default:
- arch_perf_sample__fprintf_synth_evt(sample, fp,
evsel->core.attr.config);
+ arch_perf_sample__fprintf_synth_evt(sample, fp,
evsel->core.attr.config, evsel__env(evsel));
break;
}
diff --git a/tools/perf/util/powerpc-vpadtl.c b/tools/perf/util/powerpc-vpadtl.c
index 370c566f9ac2..482ddf1a2d51 100644
--- a/tools/perf/util/powerpc-vpadtl.c
+++ b/tools/perf/util/powerpc-vpadtl.c
@@ -30,22 +30,6 @@
#include "symbol.h"
#include "tool.h"
-/*
- * The DTL entries are of below format
- */
-struct dtl_entry {
- u8 dispatch_reason;
- u8 preempt_reason;
- u16 processor_id;
- u32 enqueue_to_dispatch_time;
- u32 ready_to_enqueue_time;
- u32 waiting_to_ready_time;
- u64 timebase;
- u64 fault_addr;
- u64 srr0;
- u64 srr1;
-};
-
/*
* Structure to save the auxtrace queue
*/
diff --git a/tools/perf/util/powerpc-vpadtl.h b/tools/perf/util/powerpc-vpadtl.h
index 625172adaba5..497f704787a5 100644
--- a/tools/perf/util/powerpc-vpadtl.h
+++ b/tools/perf/util/powerpc-vpadtl.h
@@ -20,6 +20,25 @@ union perf_event;
struct perf_session;
struct perf_pmu;
+/*
+ * The DTL entries are of below format
+ */
+struct dtl_entry {
+ u8 dispatch_reason;
+ u8 preempt_reason;
+ u16 processor_id;
+ u32 enqueue_to_dispatch_time;
+ u32 ready_to_enqueue_time;
+ u32 waiting_to_ready_time;
+ u64 timebase;
+ u64 fault_addr;
+ u64 srr0;
+ u64 srr1;
+};
+
+extern const char *dispatch_reasons[11];
+extern const char *preempt_reasons[10];
+
int powerpc_vpadtl_process_auxtrace_info(union perf_event *event,
struct perf_session *session);
--
2.47.1
