Commit a0dfb18f authored by Athira Rajeev's avatar Athira Rajeev Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarAthira Rajeev <atrajeev@linux.ibm.com>
Tested-by: default avatarTejas Manhas <tejas05@linux.ibm.com>
Tested-by: default avatarVenkat Rao Bagalkote <venkat88@linux.ibm.com>
Cc: Aboorva Devarajan <aboorvad@linux.ibm.com>
Cc: Aditya Bodkhe <Aditya.Bodkhe1@ibm.com>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8644834a

tools/perf/builtin-script.c

+30 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include <linux/stringify.h>

#include <linux/time64.h>

#include <linux/zalloc.h>

#include <linux/unaligned.h>

#include <sys/utsname.h>

#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;

	}

tools/perf/util/event.h

+3 −0
Original line number Diff line number Diff line
@@ -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;