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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: Adrian 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2019-02-06 12:39:47 +02:00 committed by Arnaldo Carvalho de Melo
parent 26ee2bcdea
commit 16bd4321c2
7 changed files with 48 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
tools/perf/util/auxtrace.c
View File

@ -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;
}

2
tools/perf/util/auxtrace.h
View File

@ -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,

3
tools/perf/util/event.h
View File

@ -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];
};

4
tools/perf/util/intel-bts.c
View File

@ -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)

23
tools/perf/util/intel-pt.c
View File

@ -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)

7
tools/perf/util/s390-cpumsf.c
View File

@ -819,7 +819,7 @@ static int s390_cpumsf_process_queues(struct s390_cpumsf *sf, u64 timestamp)
}
static int s390_cpumsf_synth_error(struct s390_cpumsf *sf, int code, int cpu,
pid_t pid, pid_t tid, u64 ip)
pid_t pid, pid_t tid, u64 ip, u64 timestamp)
{
char msg[MAX_AUXTRACE_ERROR_MSG];
union perf_event event;
@ -827,7 +827,7 @@ static int s390_cpumsf_synth_error(struct s390_cpumsf *sf, int code, int cpu,
strncpy(msg, "Lost Auxiliary Trace Buffer", sizeof(msg) - 1);
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(sf->session, &event, NULL);
if (err)
@ -839,7 +839,8 @@ static int s390_cpumsf_synth_error(struct s390_cpumsf *sf, int code, int cpu,
static int s390_cpumsf_lost(struct s390_cpumsf *sf, struct perf_sample *sample)
{
return s390_cpumsf_synth_error(sf, 1, sample->cpu,
sample->pid, sample->tid, 0);
sample->pid, sample->tid, 0,
sample->time);
}
static int

3
tools/perf/util/session.c
View File

@ -703,7 +703,10 @@ static void perf_event__auxtrace_error_swap(union perf_event *event,
event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
if (event->auxtrace_error.fmt)
event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
}
static void perf_event__thread_map_swap(union perf_event *event,