Commit 16bd4321 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
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perf auxtrace: Add timestamp to auxtrace errors 



The timestamp can use useful to find part of a trace that has an error
without outputting all of the trace e.g. using the itrace 's' option to
skip initial number of events.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190206103947.15750-6-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 26ee2bcd

tools/perf/util/auxtrace.c

+20 −2
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/bitops.h>

#include <linux/log2.h>

#include <linux/string.h>

#include <linux/time64.h>



#include <sys/param.h>

#include <stdlib.h>
@@ -858,7 +859,7 @@ void auxtrace_buffer__free(struct auxtrace_buffer *buffer) 


void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,

			  int code, int cpu, pid_t pid, pid_t tid, u64 ip,

			  const char *msg)

			  const char *msg, u64 timestamp)

{

	size_t size;
@@ -870,7 +871,9 @@ void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type, 
	auxtrace_error->cpu = cpu;

	auxtrace_error->pid = pid;

	auxtrace_error->tid = tid;

	auxtrace_error->fmt = 1;

	auxtrace_error->ip = ip;

	auxtrace_error->time = timestamp;

	strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);



	size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
@@ -1160,12 +1163,27 @@ static const char *auxtrace_error_name(int type) 
size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)

{

	struct auxtrace_error_event *e = &event->auxtrace_error;

	unsigned long long nsecs = e->time;

	const char *msg = e->msg;

	int ret;



	ret = fprintf(fp, " %s error type %u",

		      auxtrace_error_name(e->type), e->type);



	if (e->fmt && nsecs) {

		unsigned long secs = nsecs / NSEC_PER_SEC;



		nsecs -= secs * NSEC_PER_SEC;

		ret += fprintf(fp, " time %lu.%09llu", secs, nsecs);

	} else {

		ret += fprintf(fp, " time 0");

	}



	if (!e->fmt)

		msg = (const char *)&e->time;



	ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",

		       e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);

		       e->cpu, e->pid, e->tid, e->ip, e->code, msg);

	return ret;

}

tools/perf/util/auxtrace.h

+1 −1
Original line number Diff line number Diff line
@@ -519,7 +519,7 @@ void auxtrace_index__free(struct list_head *head); 


void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,

			  int code, int cpu, pid_t pid, pid_t tid, u64 ip,

			  const char *msg);

			  const char *msg, u64 timestamp);



int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,

					 struct perf_tool *tool,

tools/perf/util/event.h

+2 −1
Original line number Diff line number Diff line
@@ -532,8 +532,9 @@ struct auxtrace_error_event { 
	u32 cpu;

	u32 pid;

	u32 tid;

	u32 reserved__; /* For alignment */

	u32 fmt;

	u64 ip;

	u64 time;

	char msg[MAX_AUXTRACE_ERROR_MSG];

};

tools/perf/util/intel-bts.c

+2 −2
Original line number Diff line number Diff line
@@ -144,7 +144,7 @@ static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample) 


	auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,

			     INTEL_BTS_ERR_LOST, sample->cpu, sample->pid,

			     sample->tid, 0, "Lost trace data");

			     sample->tid, 0, "Lost trace data", sample->time);



	err = perf_session__deliver_synth_event(bts->session, &event, NULL);

	if (err)
@@ -374,7 +374,7 @@ static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid, 


	auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,

			     INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip,

			     "Failed to get instruction");

			     "Failed to get instruction", 0);



	err = perf_session__deliver_synth_event(bts->session, &event, NULL);

	if (err)

tools/perf/util/intel-pt.c

+16 −7
Original line number Diff line number Diff line
@@ -1411,7 +1411,7 @@ static int intel_pt_synth_pwrx_sample(struct intel_pt_queue *ptq) 
}



static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,

				pid_t pid, pid_t tid, u64 ip)

				pid_t pid, pid_t tid, u64 ip, u64 timestamp)

{

	union perf_event event;

	char msg[MAX_AUXTRACE_ERROR_MSG];
@@ -1420,7 +1420,7 @@ static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu, 
	intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);



	auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,

			     code, cpu, pid, tid, ip, msg);

			     code, cpu, pid, tid, ip, msg, timestamp);



	err = perf_session__deliver_synth_event(pt->session, &event, NULL);

	if (err)
@@ -1430,6 +1430,18 @@ static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu, 
	return err;

}



static int intel_ptq_synth_error(struct intel_pt_queue *ptq,

				 const struct intel_pt_state *state)

{

	struct intel_pt *pt = ptq->pt;

	u64 tm = ptq->timestamp;



	tm = pt->timeless_decoding ? 0 : tsc_to_perf_time(tm, &pt->tc);



	return intel_pt_synth_error(pt, state->err, ptq->cpu, ptq->pid,

				    ptq->tid, state->from_ip, tm);

}



static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq)

{

	struct auxtrace_queue *queue;
@@ -1676,10 +1688,7 @@ static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp) 
				intel_pt_next_tid(pt, ptq);

			}

			if (pt->synth_opts.errors) {

				err = intel_pt_synth_error(pt, state->err,

							   ptq->cpu, ptq->pid,

							   ptq->tid,

							   state->from_ip);

				err = intel_ptq_synth_error(ptq, state);

				if (err)

					return err;

			}
@@ -1804,7 +1813,7 @@ static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid, 
static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample)

{

	return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu,

				    sample->pid, sample->tid, 0);

				    sample->pid, sample->tid, 0, sample->time);

}



static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu)

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