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perf/core improvements and fixes:

Browse Source 
User visible:
 
 - Validate syscall list passed via -e argument to 'perf trace' (Arnaldo Carvalho de Melo)
 
 - Introduce 'perf stat --per-thread' (Jiri Olsa)
 
 - Check access permission for --kallsyms and --vmlinux (Li Zhang)
 
 Infrastructure:
 
 - Move stuff out of 'perf stat' and into the lib for further use (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

  - Validate syscall list passed via -e argument to 'perf trace'. (Arnaldo Carvalho de Melo)

  - Introduce 'perf stat --per-thread'. (Jiri Olsa)

  - Check access permission for --kallsyms and --vmlinux. (Li Zhang)

Infrastructure changes:

  - Move stuff out of 'perf stat' and into the lib for further use. (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-06-30 06:47:32 +02:00
commit 2d6dac2fcc
19 changed files with 571 additions and 256 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/Documentation/perf-stat.txt
View File

@ -144,6 +144,10 @@ is a useful mode to detect imbalance between physical cores. To enable this mod
use --per-core in addition to -a. (system-wide). The output includes the
core number and the number of online logical processors on that physical processor.
--per-thread::
Aggregate counts per monitored threads, when monitoring threads (-t option)
or processes (-p option).
-D msecs::
--delay msecs::
After starting the program, wait msecs before measuring. This is useful to

11
tools/perf/builtin-report.c
View File

@ -742,6 +742,17 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
argc = parse_options(argc, argv, options, report_usage, 0);
if (symbol_conf.vmlinux_name &&
access(symbol_conf.vmlinux_name, R_OK)) {
pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
return -EINVAL;
}
if (symbol_conf.kallsyms_name &&
access(symbol_conf.kallsyms_name, R_OK)) {
pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name);
return -EINVAL;
}
if (report.use_stdio)
use_browser = 0;
else if (report.use_tui)

404
tools/perf/builtin-stat.c
View File

@ -67,10 +67,7 @@
#define CNTR_NOT_SUPPORTED "<not supported>"
#define CNTR_NOT_COUNTED "<not counted>"
static void print_stat(int argc, const char **argv);
static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
static void print_counter(struct perf_evsel *counter, char *prefix);
static void print_aggr(char *prefix);
static void print_counters(struct timespec *ts, int argc, const char **argv);
/* Default events used for perf stat -T */
static const char *transaction_attrs = {
@ -141,86 +138,9 @@ static inline void diff_timespec(struct timespec *r, struct timespec *a,
}
}
static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
static void perf_stat__reset_stats(void)
{
int i;
struct perf_stat *ps = evsel->priv;
for (i = 0; i < 3; i++)
init_stats(&ps->res_stats[i]);
perf_stat_evsel_id_init(evsel);
}
static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
{
evsel->priv = zalloc(sizeof(struct perf_stat));
if (evsel->priv == NULL)
return -ENOMEM;
perf_evsel__reset_stat_priv(evsel);
return 0;
}
static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
{
zfree(&evsel->priv);
}
static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
{
struct perf_counts *counts;
counts = perf_counts__new(perf_evsel__nr_cpus(evsel));
if (counts)
evsel->prev_raw_counts = counts;
return counts ? 0 : -ENOMEM;
}
static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
{
perf_counts__delete(evsel->prev_raw_counts);
evsel->prev_raw_counts = NULL;
}
static void perf_evlist__free_stats(struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
perf_evsel__free_stat_priv(evsel);
perf_evsel__free_counts(evsel);
perf_evsel__free_prev_raw_counts(evsel);
}
}
static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
(alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
goto out_free;
}
return 0;
out_free:
perf_evlist__free_stats(evlist);
return -1;
}
static void perf_stat__reset_stats(struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
perf_evsel__reset_stat_priv(evsel);
perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
}
perf_evlist__reset_stats(evsel_list);
perf_stat__reset_shadow_stats();
}
@ -294,8 +214,9 @@ static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
return 0;
}
static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
struct perf_counts_values *count)
static int
process_counter_values(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count)
{
struct perf_counts_values *aggr = &evsel->counts->aggr;
static struct perf_counts_values zero;
@ -310,13 +231,13 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
count = &zero;
switch (aggr_mode) {
case AGGR_THREAD:
case AGGR_CORE:
case AGGR_SOCKET:
case AGGR_NONE:
if (!evsel->snapshot)
perf_evsel__compute_deltas(evsel, cpu, count);
perf_evsel__compute_deltas(evsel, cpu, thread, count);
perf_counts_values__scale(count, scale, NULL);
evsel->counts->cpu[cpu] = *count;
if (aggr_mode == AGGR_NONE)
perf_stat__update_shadow_stats(evsel, count->values, cpu);
break;
@ -333,26 +254,48 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
return 0;
}
static int read_counter(struct perf_evsel *counter);
static int process_counter_maps(struct perf_evsel *counter)
{
int nthreads = thread_map__nr(counter->threads);
int ncpus = perf_evsel__nr_cpus(counter);
int cpu, thread;
/*
* Read out the results of a single counter:
* aggregate counts across CPUs in system-wide mode
*/
static int read_counter_aggr(struct perf_evsel *counter)
if (counter->system_wide)
nthreads = 1;
for (thread = 0; thread < nthreads; thread++) {
for (cpu = 0; cpu < ncpus; cpu++) {
if (process_counter_values(counter, cpu, thread,
perf_counts(counter->counts, cpu, thread)))
return -1;
}
}
return 0;
}
static int process_counter(struct perf_evsel *counter)
{
struct perf_counts_values *aggr = &counter->counts->aggr;
struct perf_stat *ps = counter->priv;
u64 *count = counter->counts->aggr.values;
int i;
int i, ret;
aggr->val = aggr->ena = aggr->run = 0;
init_stats(ps->res_stats);
if (read_counter(counter))
return -1;
if (counter->per_pkg)
zero_per_pkg(counter);
ret = process_counter_maps(counter);
if (ret)
return ret;
if (aggr_mode != AGGR_GLOBAL)
return 0;
if (!counter->snapshot)
perf_evsel__compute_deltas(counter, -1, aggr);
perf_evsel__compute_deltas(counter, -1, -1, aggr);
perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
for (i = 0; i < 3; i++)
@ -387,12 +330,12 @@ static int read_counter(struct perf_evsel *counter)
if (counter->system_wide)
nthreads = 1;
if (counter->per_pkg)
zero_per_pkg(counter);
for (thread = 0; thread < nthreads; thread++) {
for (cpu = 0; cpu < ncpus; cpu++) {
if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
struct perf_counts_values *count;
count = perf_counts(counter->counts, cpu, thread);
if (perf_evsel__read(counter, cpu, thread, count))
return -1;
}
}
@ -400,68 +343,34 @@ static int read_counter(struct perf_evsel *counter)
return 0;
}
static void print_interval(void)
static void read_counters(bool close)
{
static int num_print_interval;
struct perf_evsel *counter;
struct perf_stat *ps;
struct timespec ts, rs;
char prefix[64];
if (aggr_mode == AGGR_GLOBAL) {
evlist__for_each(evsel_list, counter) {
ps = counter->priv;
memset(ps->res_stats, 0, sizeof(ps->res_stats));
read_counter_aggr(counter);
}
} else {
evlist__for_each(evsel_list, counter) {
ps = counter->priv;
memset(ps->res_stats, 0, sizeof(ps->res_stats));
read_counter(counter);
evlist__for_each(evsel_list, counter) {
if (read_counter(counter))
pr_warning("failed to read counter %s\n", counter->name);
if (process_counter(counter))
pr_warning("failed to process counter %s\n", counter->name);
if (close) {
perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
thread_map__nr(evsel_list->threads));
}
}
}
static void process_interval(void)
{
struct timespec ts, rs;
read_counters(false);
clock_gettime(CLOCK_MONOTONIC, &ts);
diff_timespec(&rs, &ts, &ref_time);
sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
if (num_print_interval == 0 && !csv_output) {
switch (aggr_mode) {
case AGGR_SOCKET:
fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
break;
case AGGR_CORE:
fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
break;
case AGGR_NONE:
fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
break;
case AGGR_GLOBAL:
default:
fprintf(output, "# time counts %*s events\n", unit_width, "unit");
}
}
if (++num_print_interval == 25)
num_print_interval = 0;
switch (aggr_mode) {
case AGGR_CORE:
case AGGR_SOCKET:
print_aggr(prefix);
break;
case AGGR_NONE:
evlist__for_each(evsel_list, counter)
print_counter(counter, prefix);
break;
case AGGR_GLOBAL:
default:
evlist__for_each(evsel_list, counter)
print_counter_aggr(counter, prefix);
}
fflush(output);
print_counters(&rs, 0, NULL);
}
static void handle_initial_delay(void)
@ -576,7 +485,7 @@ static int __run_perf_stat(int argc, const char **argv)
if (interval) {
while (!waitpid(child_pid, &status, WNOHANG)) {
nanosleep(&ts, NULL);
print_interval();
process_interval();
}
}
wait(&status);
@ -594,7 +503,7 @@ static int __run_perf_stat(int argc, const char **argv)
while (!done) {
nanosleep(&ts, NULL);
if (interval)
print_interval();
process_interval();
}
}
@ -602,18 +511,7 @@ static int __run_perf_stat(int argc, const char **argv)
update_stats(&walltime_nsecs_stats, t1 - t0);
if (aggr_mode == AGGR_GLOBAL) {
evlist__for_each(evsel_list, counter) {
read_counter_aggr(counter);
perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
thread_map__nr(evsel_list->threads));
}
} else {
evlist__for_each(evsel_list, counter) {
read_counter(counter);
perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
}
}
read_counters(true);
return WEXITSTATUS(status);
}
@ -705,6 +603,14 @@ static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
csv_output ? 0 : -4,
perf_evsel__cpus(evsel)->map[id], csv_sep);
break;
case AGGR_THREAD:
fprintf(output, "%*s-%*d%s",
csv_output ? 0 : 16,
thread_map__comm(evsel->threads, id),
csv_output ? 0 : -8,
thread_map__pid(evsel->threads, id),
csv_sep);
break;
case AGGR_GLOBAL:
default:
break;
@ -805,9 +711,9 @@ static void print_aggr(char *prefix)
s2 = aggr_get_id(evsel_list->cpus, cpu2);
if (s2 != id)
continue;
val += counter->counts->cpu[cpu].val;
ena += counter->counts->cpu[cpu].ena;
run += counter->counts->cpu[cpu].run;
val += perf_counts(counter->counts, cpu, 0)->val;
ena += perf_counts(counter->counts, cpu, 0)->ena;
run += perf_counts(counter->counts, cpu, 0)->run;
nr++;
}
if (prefix)
@ -853,6 +759,40 @@ static void print_aggr(char *prefix)
}
}
static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
{
int nthreads = thread_map__nr(counter->threads);
int ncpus = cpu_map__nr(counter->cpus);
int cpu, thread;
double uval;
for (thread = 0; thread < nthreads; thread++) {
u64 ena = 0, run = 0, val = 0;
for (cpu = 0; cpu < ncpus; cpu++) {
val += perf_counts(counter->counts, cpu, thread)->val;
ena += perf_counts(counter->counts, cpu, thread)->ena;
run += perf_counts(counter->counts, cpu, thread)->run;
}
if (prefix)
fprintf(output, "%s", prefix);
uval = val * counter->scale;
if (nsec_counter(counter))
nsec_printout(thread, 0, counter, uval);
else
abs_printout(thread, 0, counter, uval);
if (!csv_output)
print_noise(counter, 1.0);
print_running(run, ena);
fputc('\n', output);
}
}
/*
* Print out the results of a single counter:
* aggregated counts in system-wide mode
@ -915,9 +855,9 @@ static void print_counter(struct perf_evsel *counter, char *prefix)
int cpu;
for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
val = counter->counts->cpu[cpu].val;
ena = counter->counts->cpu[cpu].ena;
run = counter->counts->cpu[cpu].run;
val = perf_counts(counter->counts, cpu, 0)->val;
ena = perf_counts(counter->counts, cpu, 0)->ena;
run = perf_counts(counter->counts, cpu, 0)->run;
if (prefix)
fprintf(output, "%s", prefix);
@ -962,9 +902,38 @@ static void print_counter(struct perf_evsel *counter, char *prefix)
}
}
static void print_stat(int argc, const char **argv)
static void print_interval(char *prefix, struct timespec *ts)
{
static int num_print_interval;
sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
if (num_print_interval == 0 && !csv_output) {
switch (aggr_mode) {
case AGGR_SOCKET:
fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
break;
case AGGR_CORE:
fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
break;
case AGGR_NONE:
fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
break;
case AGGR_THREAD:
fprintf(output, "# time comm-pid counts %*s events\n", unit_width, "unit");
break;
case AGGR_GLOBAL:
default:
fprintf(output, "# time counts %*s events\n", unit_width, "unit");
}
}
if (++num_print_interval == 25)
num_print_interval = 0;
}
static void print_header(int argc, const char **argv)
{
struct perf_evsel *counter;
int i;
fflush(stdout);
@ -990,36 +959,57 @@ static void print_stat(int argc, const char **argv)
fprintf(output, " (%d runs)", run_count);
fprintf(output, ":\n\n");
}
}
static void print_footer(void)
{
if (!null_run)
fprintf(output, "\n");
fprintf(output, " %17.9f seconds time elapsed",
avg_stats(&walltime_nsecs_stats)/1e9);
if (run_count > 1) {
fprintf(output, " ");
print_noise_pct(stddev_stats(&walltime_nsecs_stats),
avg_stats(&walltime_nsecs_stats));
}
fprintf(output, "\n\n");
}
static void print_counters(struct timespec *ts, int argc, const char **argv)
{
struct perf_evsel *counter;
char buf[64], *prefix = NULL;
if (interval)
print_interval(prefix = buf, ts);
else
print_header(argc, argv);
switch (aggr_mode) {
case AGGR_CORE:
case AGGR_SOCKET:
print_aggr(NULL);
print_aggr(prefix);
break;
case AGGR_THREAD:
evlist__for_each(evsel_list, counter)
print_aggr_thread(counter, prefix);
break;
case AGGR_GLOBAL:
evlist__for_each(evsel_list, counter)
print_counter_aggr(counter, NULL);
print_counter_aggr(counter, prefix);
break;
case AGGR_NONE:
evlist__for_each(evsel_list, counter)
print_counter(counter, NULL);
print_counter(counter, prefix);
break;
default:
break;
}
if (!csv_output) {
if (!null_run)
fprintf(output, "\n");
fprintf(output, " %17.9f seconds time elapsed",
avg_stats(&walltime_nsecs_stats)/1e9);
if (run_count > 1) {
fprintf(output, " ");
print_noise_pct(stddev_stats(&walltime_nsecs_stats),
avg_stats(&walltime_nsecs_stats));
}
fprintf(output, "\n\n");
}
if (!interval && !csv_output)
print_footer();
fflush(output);
}
static volatile int signr = -1;
@ -1091,6 +1081,7 @@ static int perf_stat_init_aggr_mode(void)
break;
case AGGR_NONE:
case AGGR_GLOBAL:
case AGGR_THREAD:
default:
break;
}
@ -1315,6 +1306,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
"aggregate counts per processor socket", AGGR_SOCKET),
OPT_SET_UINT(0, "per-core", &aggr_mode,
"aggregate counts per physical processor core", AGGR_CORE),
OPT_SET_UINT(0, "per-thread", &aggr_mode,
"aggregate counts per thread", AGGR_THREAD),
OPT_UINTEGER('D', "delay", &initial_delay,
"ms to wait before starting measurement after program start"),
OPT_END()
@ -1406,8 +1399,19 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
run_count = 1;
}
/* no_aggr, cgroup are for system-wide only */
if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
if ((aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
fprintf(stderr, "The --per-thread option is only available "
"when monitoring via -p -t options.\n");
parse_options_usage(NULL, options, "p", 1);
parse_options_usage(NULL, options, "t", 1);
goto out;
}
/*
* no_aggr, cgroup are for system-wide only
* --per-thread is aggregated per thread, we dont mix it with cpu mode
*/
if (((aggr_mode != AGGR_GLOBAL && aggr_mode != AGGR_THREAD) || nr_cgroups) &&
!target__has_cpu(&target)) {
fprintf(stderr, "both cgroup and no-aggregation "
"modes only available in system-wide mode\n");
@ -1435,6 +1439,14 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
}
goto out;
}
/*
* Initialize thread_map with comm names,
* so we could print it out on output.
*/
if (aggr_mode == AGGR_THREAD)
thread_map__read_comms(evsel_list->threads);
if (interval && interval < 100) {
pr_err("print interval must be >= 100ms\n");
parse_options_usage(stat_usage, options, "I", 1);
@ -1468,13 +1480,13 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
status = run_perf_stat(argc, argv);
if (forever && status != -1) {
print_stat(argc, argv);
perf_stat__reset_stats(evsel_list);
print_counters(NULL, argc, argv);
perf_stat__reset_stats();
}
}
if (!forever && status != -1 && !interval)
print_stat(argc, argv);
print_counters(NULL, argc, argv);
perf_evlist__free_stats(evsel_list);
out:

32
tools/perf/builtin-trace.c
View File

@ -1617,6 +1617,34 @@ static int trace__read_syscall_info(struct trace *trace, int id)
return syscall__set_arg_fmts(sc);
}
static int trace__validate_ev_qualifier(struct trace *trace)
{
int err = 0;
struct str_node *pos;
strlist__for_each(pos, trace->ev_qualifier) {
const char *sc = pos->s;
if (audit_name_to_syscall(sc, trace->audit.machine) < 0) {
if (err == 0) {
fputs("Error:\tInvalid syscall ", trace->output);
err = -EINVAL;
} else {
fputs(", ", trace->output);
}
fputs(sc, trace->output);
}
}
if (err < 0) {
fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
"\nHint:\tand: 'man syscalls'\n", trace->output);
}
return err;
}
/*
* args is to be interpreted as a series of longs but we need to handle
* 8-byte unaligned accesses. args points to raw_data within the event
@ -2862,6 +2890,10 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
err = -ENOMEM;
goto out_close;
}
err = trace__validate_ev_qualifier(&trace);
if (err)
goto out_close;
}
err = target__validate(&trace.opts.target);

1
tools/perf/tests/Build
View File

@ -31,6 +31,7 @@ perf-y += code-reading.o
perf-y += sample-parsing.o
perf-y += parse-no-sample-id-all.o
perf-y += kmod-path.o
perf-y += thread-map.o
perf-$(CONFIG_X86) += perf-time-to-tsc.o

4
tools/perf/tests/builtin-test.c
View File

@ -170,6 +170,10 @@ static struct test {
.desc = "Test kmod_path__parse function",
.func = test__kmod_path__parse,
},
{
.desc = "Test thread map",
.func = test__thread_map,
},
{
.func = NULL,
},

6
tools/perf/tests/openat-syscall-all-cpus.c
View File

@ -78,7 +78,7 @@ int test__openat_syscall_event_on_all_cpus(void)
* we use the auto allocation it will allocate just for 1 cpu,
* as we start by cpu 0.
*/
if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
if (perf_evsel__alloc_counts(evsel, cpus->nr, 1) < 0) {
pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
goto out_close_fd;
}
@ -98,9 +98,9 @@ int test__openat_syscall_event_on_all_cpus(void)
}
expected = nr_openat_calls + cpu;
if (evsel->counts->cpu[cpu].val != expected) {
if (perf_counts(evsel->counts, cpu, 0)->val != expected) {
pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
expected, cpus->map[cpu], perf_counts(evsel->counts, cpu, 0)->val);
err = -1;
}
}

4
tools/perf/tests/openat-syscall.c
View File

@ -44,9 +44,9 @@ int test__openat_syscall_event(void)
goto out_close_fd;
}
if (evsel->counts->cpu[0].val != nr_openat_calls) {
if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
nr_openat_calls, evsel->counts->cpu[0].val);
nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
goto out_close_fd;
}

1
tools/perf/tests/tests.h
View File

@ -61,6 +61,7 @@ int test__switch_tracking(void);
int test__fdarray__filter(void);
int test__fdarray__add(void);
int test__kmod_path__parse(void);
int test__thread_map(void);
#if defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT

38
tools/perf/tests/thread-map.c Normal file
View File

@ -0,0 +1,38 @@
#include <sys/types.h>
#include <unistd.h>
#include "tests.h"
#include "thread_map.h"
#include "debug.h"
int test__thread_map(void)
{
struct thread_map *map;
/* test map on current pid */
map = thread_map__new_by_pid(getpid());
TEST_ASSERT_VAL("failed to alloc map", map);
thread_map__read_comms(map);
TEST_ASSERT_VAL("wrong nr", map->nr == 1);
TEST_ASSERT_VAL("wrong pid",
thread_map__pid(map, 0) == getpid());
TEST_ASSERT_VAL("wrong comm",
thread_map__comm(map, 0) &&
!strcmp(thread_map__comm(map, 0), "perf"));
thread_map__put(map);
/* test dummy pid */
map = thread_map__new_dummy();
TEST_ASSERT_VAL("failed to alloc map", map);
thread_map__read_comms(map);
TEST_ASSERT_VAL("wrong nr", map->nr == 1);
TEST_ASSERT_VAL("wrong pid", thread_map__pid(map, 0) == -1);
TEST_ASSERT_VAL("wrong comm",
thread_map__comm(map, 0) &&
!strcmp(thread_map__comm(map, 0), "dummy"));
thread_map__put(map);
return 0;
}

1
tools/perf/util/evlist.h
View File

@ -289,5 +289,4 @@ void perf_evlist__to_front(struct perf_evlist *evlist,
void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
struct perf_evsel *tracking_evsel);
#endif /* __PERF_EVLIST_H */

24
tools/perf/util/evsel.c
View File

@ -898,7 +898,7 @@ void perf_evsel__delete(struct perf_evsel *evsel)
free(evsel);
}
void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count)
{
struct perf_counts_values tmp;
@ -910,8 +910,8 @@ void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
tmp = evsel->prev_raw_counts->aggr;
evsel->prev_raw_counts->aggr = *count;
} else {
tmp = evsel->prev_raw_counts->cpu[cpu];
evsel->prev_raw_counts->cpu[cpu] = *count;
tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
*perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
}
count->val = count->val - tmp.val;
@ -939,20 +939,18 @@ void perf_counts_values__scale(struct perf_counts_values *count,
*pscaled = scaled;
}
int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
perf_evsel__read_cb_t cb)
int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count)
{
struct perf_counts_values count;
memset(&count, 0, sizeof(count));
memset(count, 0, sizeof(*count));
if (FD(evsel, cpu, thread) < 0)
return -EINVAL;
if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0)
if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
return -errno;
return cb(evsel, cpu, thread, &count);
return 0;
}
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
@ -964,15 +962,15 @@ int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
if (FD(evsel, cpu, thread) < 0)
return -EINVAL;
if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
return -ENOMEM;
if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
return -errno;
perf_evsel__compute_deltas(evsel, cpu, &count);
perf_evsel__compute_deltas(evsel, cpu, thread, &count);
perf_counts_values__scale(&count, scale, NULL);
evsel->counts->cpu[cpu] = count;
*perf_counts(evsel->counts, cpu, thread) = count;
return 0;
}

28
tools/perf/util/evsel.h
View File

@ -9,23 +9,7 @@
#include "xyarray.h"
#include "symbol.h"
#include "cpumap.h"
struct perf_counts_values {
union {
struct {
u64 val;
u64 ena;
u64 run;
};
u64 values[3];
};
};
struct perf_counts {
s8 scaled;
struct perf_counts_values aggr;
struct perf_counts_values cpu[];
};
#include "stat.h"
struct perf_evsel;
@ -128,7 +112,7 @@ static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
void perf_counts_values__scale(struct perf_counts_values *count,
bool scale, s8 *pscaled);
void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count);
int perf_evsel__object_config(size_t object_size,
@ -245,12 +229,8 @@ static inline bool perf_evsel__match2(struct perf_evsel *e1,
(a)->attr.type == (b)->attr.type && \
(a)->attr.config == (b)->attr.config)
typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel,
int cpu, int thread,
struct perf_counts_values *count);
int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
perf_evsel__read_cb_t cb);
int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count);
int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
int cpu, int thread, bool scale);

1
tools/perf/util/python-ext-sources
View File

@ -20,3 +20,4 @@ util/stat.c
util/strlist.c
util/trace-event.c
../../lib/rbtree.c
util/string.c

132
tools/perf/util/stat.c
View File

@ -1,6 +1,8 @@
#include <math.h>
#include "stat.h"
#include "evlist.h"
#include "evsel.h"
#include "thread_map.h"
void update_stats(struct stats *stats, u64 val)
{
@ -95,33 +97,46 @@ void perf_stat_evsel_id_init(struct perf_evsel *evsel)
}
}
struct perf_counts *perf_counts__new(int ncpus)
struct perf_counts *perf_counts__new(int ncpus, int nthreads)
{
int size = sizeof(struct perf_counts) +
ncpus * sizeof(struct perf_counts_values);
struct perf_counts *counts = zalloc(sizeof(*counts));
return zalloc(size);
if (counts) {
struct xyarray *values;
values = xyarray__new(ncpus, nthreads, sizeof(struct perf_counts_values));
if (!values) {
free(counts);
return NULL;
}
counts->values = values;
}
return counts;
}
void perf_counts__delete(struct perf_counts *counts)
{
free(counts);
if (counts) {
xyarray__delete(counts->values);
free(counts);
}
}
static void perf_counts__reset(struct perf_counts *counts, int ncpus)
static void perf_counts__reset(struct perf_counts *counts)
{
memset(counts, 0, (sizeof(*counts) +
(ncpus * sizeof(struct perf_counts_values))));
xyarray__reset(counts->values);
}
void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
void perf_evsel__reset_counts(struct perf_evsel *evsel)
{
perf_counts__reset(evsel->counts, ncpus);
perf_counts__reset(evsel->counts);
}
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus, int nthreads)
{
evsel->counts = perf_counts__new(ncpus);
evsel->counts = perf_counts__new(ncpus, nthreads);
return evsel->counts != NULL ? 0 : -ENOMEM;
}
@ -130,3 +145,96 @@ void perf_evsel__free_counts(struct perf_evsel *evsel)
perf_counts__delete(evsel->counts);
evsel->counts = NULL;
}
void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
{
int i;
struct perf_stat *ps = evsel->priv;
for (i = 0; i < 3; i++)
init_stats(&ps->res_stats[i]);
perf_stat_evsel_id_init(evsel);
}
int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
{
evsel->priv = zalloc(sizeof(struct perf_stat));
if (evsel->priv == NULL)
return -ENOMEM;
perf_evsel__reset_stat_priv(evsel);
return 0;
}
void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
{
zfree(&evsel->priv);
}
int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel,
int ncpus, int nthreads)
{
struct perf_counts *counts;
counts = perf_counts__new(ncpus, nthreads);
if (counts)
evsel->prev_raw_counts = counts;
return counts ? 0 : -ENOMEM;
}
void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
{
perf_counts__delete(evsel->prev_raw_counts);
evsel->prev_raw_counts = NULL;
}
int perf_evsel__alloc_stats(struct perf_evsel *evsel, bool alloc_raw)
{
int ncpus = perf_evsel__nr_cpus(evsel);
int nthreads = thread_map__nr(evsel->threads);
if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
perf_evsel__alloc_counts(evsel, ncpus, nthreads) < 0 ||
(alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel, ncpus, nthreads) < 0))
return -ENOMEM;
return 0;
}
int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
if (perf_evsel__alloc_stats(evsel, alloc_raw))
goto out_free;
}
return 0;
out_free:
perf_evlist__free_stats(evlist);
return -1;
}
void perf_evlist__free_stats(struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
perf_evsel__free_stat_priv(evsel);
perf_evsel__free_counts(evsel);
perf_evsel__free_prev_raw_counts(evsel);
}
}
void perf_evlist__reset_stats(struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
evlist__for_each(evlist, evsel) {
perf_evsel__reset_stat_priv(evsel);
perf_evsel__reset_counts(evsel);
}
}

47
tools/perf/util/stat.h
View File

@ -3,6 +3,7 @@
#include <linux/types.h>
#include <stdio.h>
#include "xyarray.h"
struct stats
{
@ -29,8 +30,32 @@ enum aggr_mode {
AGGR_GLOBAL,
AGGR_SOCKET,
AGGR_CORE,
AGGR_THREAD,
};
struct perf_counts_values {
union {
struct {
u64 val;
u64 ena;
u64 run;
};
u64 values[3];
};
};
struct perf_counts {
s8 scaled;
struct perf_counts_values aggr;
struct xyarray *values;
};
static inline struct perf_counts_values*
perf_counts(struct perf_counts *counts, int cpu, int thread)
{
return xyarray__entry(counts->values, cpu, thread);
}
void update_stats(struct stats *stats, u64 val);
double avg_stats(struct stats *stats);
double stddev_stats(struct stats *stats);
@ -46,6 +71,8 @@ static inline void init_stats(struct stats *stats)
}
struct perf_evsel;
struct perf_evlist;
bool __perf_evsel_stat__is(struct perf_evsel *evsel,
enum perf_stat_evsel_id id);
@ -62,10 +89,24 @@ void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
void perf_stat__print_shadow_stats(FILE *out, struct perf_evsel *evsel,
double avg, int cpu, enum aggr_mode aggr);
struct perf_counts *perf_counts__new(int ncpus);
struct perf_counts *perf_counts__new(int ncpus, int nthreads);
void perf_counts__delete(struct perf_counts *counts);
void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
void perf_evsel__reset_counts(struct perf_evsel *evsel);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus, int nthreads);
void perf_evsel__free_counts(struct perf_evsel *evsel);
void perf_evsel__reset_stat_priv(struct perf_evsel *evsel);
int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel);
void perf_evsel__free_stat_priv(struct perf_evsel *evsel);
int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel,
int ncpus, int nthreads);
void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel);
int perf_evsel__alloc_stats(struct perf_evsel *evsel, bool alloc_raw);
int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw);
void perf_evlist__free_stats(struct perf_evlist *evlist);
void perf_evlist__reset_stats(struct perf_evlist *evlist);
#endif

5
tools/perf/util/symbol.c
View File

@ -1132,8 +1132,11 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
INIT_LIST_HEAD(&md.maps);
fd = open(kcore_filename, O_RDONLY);
if (fd < 0)
if (fd < 0) {
pr_err("%s requires CAP_SYS_RAWIO capability to access.\n",
kcore_filename);
return -EINVAL;
}
/* Read new maps into temporary lists */
err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md,

76
tools/perf/util/thread_map.c
View File

@ -8,9 +8,11 @@
#include <unistd.h>
#include "strlist.h"
#include <string.h>
#include <api/fs/fs.h>
#include "asm/bug.h"
#include "thread_map.h"
#include "util.h"
#include "debug.h"
/* Skip "." and ".." directories */
static int filter(const struct dirent *dir)
@ -21,11 +23,26 @@ static int filter(const struct dirent *dir)
return 1;
}
static void thread_map__reset(struct thread_map *map, int start, int nr)
{
size_t size = (nr - start) * sizeof(map->map[0]);
memset(&map->map[start], 0, size);
}
static struct thread_map *thread_map__realloc(struct thread_map *map, int nr)
{
size_t size = sizeof(*map) + sizeof(map->map[0]) * nr;
int start = map ? map->nr : 0;
return realloc(map, size);
map = realloc(map, size);
/*
* We only realloc to add more items, let's reset new items.
*/
if (map)
thread_map__reset(map, start, nr);
return map;
}
#define thread_map__alloc(__nr) thread_map__realloc(NULL, __nr)
@ -304,8 +321,12 @@ struct thread_map *thread_map__new_str(const char *pid, const char *tid,
static void thread_map__delete(struct thread_map *threads)
{
if (threads) {
int i;
WARN_ONCE(atomic_read(&threads->refcnt) != 0,
"thread map refcnt unbalanced\n");
for (i = 0; i < threads->nr; i++)
free(thread_map__comm(threads, i));
free(threads);
}
}
@ -333,3 +354,56 @@ size_t thread_map__fprintf(struct thread_map *threads, FILE *fp)
return printed + fprintf(fp, "\n");
}
static int get_comm(char **comm, pid_t pid)
{
char *path;
size_t size;
int err;
if (asprintf(&path, "%s/%d/comm", procfs__mountpoint(), pid) == -1)
return -ENOMEM;
err = filename__read_str(path, comm, &size);
if (!err) {
/*
* We're reading 16 bytes, while filename__read_str
* allocates data per BUFSIZ bytes, so we can safely
* mark the end of the string.
*/
(*comm)[size] = 0;
rtrim(*comm);
}
free(path);
return err;
}
static void comm_init(struct thread_map *map, int i)
{
pid_t pid = thread_map__pid(map, i);
char *comm = NULL;
/* dummy pid comm initialization */
if (pid == -1) {
map->map[i].comm = strdup("dummy");
return;
}
/*
* The comm name is like extra bonus ;-),
* so just warn if we fail for any reason.
*/
if (get_comm(&comm, pid))
pr_warning("Couldn't resolve comm name for pid %d\n", pid);
map->map[i].comm = comm;
}
void thread_map__read_comms(struct thread_map *threads)
{
int i;
for (i = 0; i < threads->nr; ++i)
comm_init(threads, i);
}

8
tools/perf/util/thread_map.h
View File

@ -7,6 +7,7 @@
struct thread_map_data {
pid_t pid;
char *comm;
};
struct thread_map {
@ -44,4 +45,11 @@ thread_map__set_pid(struct thread_map *map, int thread, pid_t pid)
{
map->map[thread].pid = pid;
}
static inline char *thread_map__comm(struct thread_map *map, int thread)
{
return map->map[thread].comm;
}
void thread_map__read_comms(struct thread_map *threads);
#endif /* __PERF_THREAD_MAP_H */