diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 7 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 87 | ||||
| -rw-r--r-- | tools/perf/perf.h | 2 | ||||
| -rw-r--r-- | tools/perf/util/evsel.c | 59 | ||||
| -rw-r--r-- | tools/perf/util/header.c | 3 |
5 files changed, 154 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 355c4f5569b5..4847a793de65 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -250,6 +250,13 @@ is off by default. --running-time:: Record running and enabled time for read events (:S) +-k:: +--clockid:: +Sets the clock id to use for the various time fields in the perf_event_type +records. See clock_gettime(). In particular CLOCK_MONOTONIC and +CLOCK_MONOTONIC_RAW are supported, some events might also allow +CLOCK_BOOTTIME, CLOCK_REALTIME and CLOCK_TAI. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 18aad239b401..ac610488d2e1 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -711,6 +711,90 @@ static int perf_record_config(const char *var, const char *value, void *cb) return perf_default_config(var, value, cb); } +struct clockid_map { + const char *name; + int clockid; +}; + +#define CLOCKID_MAP(n, c) \ + { .name = n, .clockid = (c), } + +#define CLOCKID_END { .name = NULL, } + + +/* + * Add the missing ones, we need to build on many distros... + */ +#ifndef CLOCK_MONOTONIC_RAW +#define CLOCK_MONOTONIC_RAW 4 +#endif +#ifndef CLOCK_BOOTTIME +#define CLOCK_BOOTTIME 7 +#endif +#ifndef CLOCK_TAI +#define CLOCK_TAI 11 +#endif + +static const struct clockid_map clockids[] = { + /* available for all events, NMI safe */ + CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), + CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), + + /* available for some events */ + CLOCKID_MAP("realtime", CLOCK_REALTIME), + CLOCKID_MAP("boottime", CLOCK_BOOTTIME), + CLOCKID_MAP("tai", CLOCK_TAI), + + /* available for the lazy */ + CLOCKID_MAP("mono", CLOCK_MONOTONIC), + CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), + CLOCKID_MAP("real", CLOCK_REALTIME), + CLOCKID_MAP("boot", CLOCK_BOOTTIME), + + CLOCKID_END, +}; + +static int parse_clockid(const struct option *opt, const char *str, int unset) +{ + struct record_opts *opts = (struct record_opts *)opt->value; + const struct clockid_map *cm; + const char *ostr = str; + + if (unset) { + opts->use_clockid = 0; + return 0; + } + + /* no arg passed */ + if (!str) + return 0; + + /* no setting it twice */ + if (opts->use_clockid) + return -1; + + opts->use_clockid = true; + + /* if its a number, we're done */ + if (sscanf(str, "%d", &opts->clockid) == 1) + return 0; + + /* allow a "CLOCK_" prefix to the name */ + if (!strncasecmp(str, "CLOCK_", 6)) + str += 6; + + for (cm = clockids; cm->name; cm++) { + if (!strcasecmp(str, cm->name)) { + opts->clockid = cm->clockid; + return 0; + } + } + + opts->use_clockid = false; + ui__warning("unknown clockid %s, check man page\n", ostr); + return -1; +} + static const char * const __record_usage[] = { "perf record [<options>] [<command>]", "perf record [<options>] -- <command> [<options>]", @@ -842,6 +926,9 @@ struct option __record_options[] = { "Sample machine registers on interrupt"), OPT_BOOLEAN(0, "running-time", &record.opts.running_time, "Record running/enabled time of read (:S) events"), + OPT_CALLBACK('k', "clockid", &record.opts, + "clockid", "clockid to use for events, see clock_gettime()", + parse_clockid), OPT_END() }; diff --git a/tools/perf/perf.h b/tools/perf/perf.h index c38a085a5571..e14bb637255c 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -62,6 +62,8 @@ struct record_opts { u64 user_interval; bool sample_transaction; unsigned initial_delay; + bool use_clockid; + clockid_t clockid; }; struct option; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 358e5954baa8..d190f99a3a97 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -32,8 +32,12 @@ static struct { bool exclude_guest; bool mmap2; bool cloexec; + bool clockid; + bool clockid_wrong; } perf_missing_features; +static clockid_t clockid; + static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused) { return 0; @@ -761,6 +765,12 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) attr->disabled = 0; attr->enable_on_exec = 0; } + + clockid = opts->clockid; + if (opts->use_clockid) { + attr->use_clockid = 1; + attr->clockid = opts->clockid; + } } static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) @@ -1036,7 +1046,6 @@ static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp) ret += PRINT_ATTR2(exclude_user, exclude_kernel); ret += PRINT_ATTR2(exclude_hv, exclude_idle); ret += PRINT_ATTR2(mmap, comm); - ret += PRINT_ATTR2(mmap2, comm_exec); ret += PRINT_ATTR2(freq, inherit_stat); ret += PRINT_ATTR2(enable_on_exec, task); ret += PRINT_ATTR2(watermark, precise_ip); @@ -1044,6 +1053,9 @@ static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp) ret += PRINT_ATTR2(exclude_host, exclude_guest); ret += PRINT_ATTR2N("excl.callchain_kern", exclude_callchain_kernel, "excl.callchain_user", exclude_callchain_user); + ret += PRINT_ATTR2(mmap2, comm_exec); + ret += __PRINT_ATTR("%u",,use_clockid); + ret += PRINT_ATTR_U32(wakeup_events); ret += PRINT_ATTR_U32(wakeup_watermark); @@ -1055,6 +1067,7 @@ static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp) ret += PRINT_ATTR_X64(branch_sample_type); ret += PRINT_ATTR_X64(sample_regs_user); ret += PRINT_ATTR_U32(sample_stack_user); + ret += PRINT_ATTR_U32(clockid); ret += PRINT_ATTR_X64(sample_regs_intr); ret += fprintf(fp, "%.60s\n", graph_dotted_line); @@ -1085,6 +1098,12 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, } fallback_missing_features: + if (perf_missing_features.clockid_wrong) + evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */ + if (perf_missing_features.clockid) { + evsel->attr.use_clockid = 0; + evsel->attr.clockid = 0; + } if (perf_missing_features.cloexec) flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; if (perf_missing_features.mmap2) @@ -1122,6 +1141,17 @@ retry_open: goto try_fallback; } set_rlimit = NO_CHANGE; + + /* + * If we succeeded but had to kill clockid, fail and + * have perf_evsel__open_strerror() print us a nice + * error. + */ + if (perf_missing_features.clockid || + perf_missing_features.clockid_wrong) { + err = -EINVAL; + goto out_close; + } } } @@ -1155,7 +1185,17 @@ try_fallback: if (err != -EINVAL || cpu > 0 || thread > 0) goto out_close; - if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { + /* + * Must probe features in the order they were added to the + * perf_event_attr interface. + */ + if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) { + perf_missing_features.clockid_wrong = true; + goto fallback_missing_features; + } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) { + perf_missing_features.clockid = true; + goto fallback_missing_features; + } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { perf_missing_features.cloexec = true; goto fallback_missing_features; } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) { @@ -2063,9 +2103,7 @@ int perf_evsel__fprintf(struct perf_evsel *evsel, if_print(exclude_hv); if_print(exclude_idle); if_print(mmap); - if_print(mmap2); if_print(comm); - if_print(comm_exec); if_print(freq); if_print(inherit_stat); if_print(enable_on_exec); @@ -2076,10 +2114,17 @@ int perf_evsel__fprintf(struct perf_evsel *evsel, if_print(sample_id_all); if_print(exclude_host); if_print(exclude_guest); + if_print(mmap2); + if_print(comm_exec); + if_print(use_clockid); if_print(__reserved_1); if_print(wakeup_events); if_print(bp_type); if_print(branch_sample_type); + if_print(sample_regs_user); + if_print(sample_stack_user); + if_print(clockid); + if_print(sample_regs_intr); } out: fputc('\n', fp); @@ -2158,6 +2203,12 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, "The PMU counters are busy/taken by another profiler.\n" "We found oprofile daemon running, please stop it and try again."); break; + case EINVAL: + if (perf_missing_features.clockid) + return scnprintf(msg, size, "clockid feature not supported."); + if (perf_missing_features.clockid_wrong) + return scnprintf(msg, size, "wrong clockid (%d).", clockid); + break; default: break; } diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index fb432153e2aa..de5f4669ba5f 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1098,6 +1098,9 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp) } fprintf(fp, " }"); } + if (evsel->attr.use_clockid) + fprintf(fp, ", clockid = %d", evsel->attr.clockid); + fputc('\n', fp); } |
