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perf parse-events: Break out tracepoint and printing

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Move print_*_events functions out of parse-events.c into a new
print-events.c. Move tracepoint code into tracepoint.c or
trace-event-info.c (sole user). This reduces the dependencies of
parse-events.c and makes it more amenable to being a library in the
future.

Remove some unnecessary definitions from parse-events.h. Fix a
checkpatch.pl warning on using unsigned rather than unsigned int.  Fix
some line length warnings too.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220729204217.250166-3-irogers@google.com
[ Add include linux/stddef.h before perf_events.h for systems where __always_inline isn't pulled in before used, such as older Alpine Linux ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2022-07-29 13:42:17 -07:00 committed by Arnaldo Carvalho de Melo
parent 32f457abb8
commit 9b7c7728f4
12 changed files with 791 additions and 738 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/builtin-list.c
View File

@ -10,7 +10,7 @@
*/
#include "builtin.h"
#include "util/parse-events.h"
#include "util/print-events.h"
#include "util/pmu.h"
#include "util/pmu-hybrid.h"
#include "util/debug.h"

1
tools/perf/builtin-lock.c
View File

@ -16,6 +16,7 @@
#include <subcmd/pager.h>
#include <subcmd/parse-options.h>
#include "util/trace-event.h"
#include "util/tracepoint.h"
#include "util/debug.h"
#include "util/session.h"

1
tools/perf/builtin-timechart.c
View File

@ -36,6 +36,7 @@
#include "util/data.h"
#include "util/debug.h"
#include "util/string2.h"
#include "util/tracepoint.h"
#include <linux/err.h>
#ifdef LACKS_OPEN_MEMSTREAM_PROTOTYPE

1
tools/perf/builtin-trace.c
View File

@ -53,6 +53,7 @@
#include "trace-event.h"
#include "util/parse-events.h"
#include "util/bpf-loader.h"
#include "util/tracepoint.h"
#include "callchain.h"
#include "print_binary.h"
#include "string2.h"

2
tools/perf/util/Build
View File

@ -26,6 +26,8 @@ perf-y += mmap.o
perf-y += memswap.o
perf-y += parse-events.o
perf-y += parse-events-hybrid.o
perf-y += print-events.o
perf-y += tracepoint.o
perf-y += perf_regs.o
perf-y += path.o
perf-y += print_binary.o

713
tools/perf/util/parse-events.c
View File

@ -5,18 +5,12 @@
#include <dirent.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/param.h>
#include "term.h"
#include "build-id.h"
#include "evlist.h"
#include "evsel.h"
#include <subcmd/pager.h>
#include <subcmd/parse-options.h>
#include "parse-events.h"
#include <subcmd/exec-cmd.h>
#include "string2.h"
#include "strlist.h"
#include "bpf-loader.h"
@ -26,20 +20,22 @@
#include "parse-events-bison.h"
#include "parse-events-flex.h"
#include "pmu.h"
#include "thread_map.h"
#include "probe-file.h"
#include "asm/bug.h"
#include "util/parse-branch-options.h"
#include "metricgroup.h"
#include "util/evsel_config.h"
#include "util/event.h"
#include "util/pfm.h"
#include "perf.h"
#include "util/parse-events-hybrid.h"
#include "util/pmu-hybrid.h"
#include "perf.h"
#include "tracepoint.h"
#define MAX_NAME_LEN 100
struct perf_pmu_event_symbol {
char *symbol;
enum perf_pmu_event_symbol_type type;
};
#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
@ -153,21 +149,6 @@ struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
},
};
struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
[PERF_TOOL_DURATION_TIME] = {
.symbol = "duration_time",
.alias = "",
},
[PERF_TOOL_USER_TIME] = {
.symbol = "user_time",
.alias = "",
},
[PERF_TOOL_SYSTEM_TIME] = {
.symbol = "system_time",
.alias = "",
},
};
#define __PERF_EVENT_FIELD(config, name) \
((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
@ -176,121 +157,6 @@ struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
#define for_each_subsystem(sys_dir, sys_dirent) \
while ((sys_dirent = readdir(sys_dir)) != NULL) \
if (sys_dirent->d_type == DT_DIR && \
(strcmp(sys_dirent->d_name, ".")) && \
(strcmp(sys_dirent->d_name, "..")))
static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
{
char evt_path[MAXPATHLEN];
int fd;
snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
return -EINVAL;
close(fd);
return 0;
}
#define for_each_event(dir_path, evt_dir, evt_dirent) \
while ((evt_dirent = readdir(evt_dir)) != NULL) \
if (evt_dirent->d_type == DT_DIR && \
(strcmp(evt_dirent->d_name, ".")) && \
(strcmp(evt_dirent->d_name, "..")) && \
(!tp_event_has_id(dir_path, evt_dirent)))
#define MAX_EVENT_LENGTH 512
struct tracepoint_path *tracepoint_id_to_path(u64 config)
{
struct tracepoint_path *path = NULL;
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char id_buf[24];
int fd;
u64 id;
char evt_path[MAXPATHLEN];
char *dir_path;
sys_dir = tracing_events__opendir();
if (!sys_dir)
return NULL;
for_each_subsystem(sys_dir, sys_dirent) {
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
evt_dirent->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
continue;
if (read(fd, id_buf, sizeof(id_buf)) < 0) {
close(fd);
continue;
}
close(fd);
id = atoll(id_buf);
if (id == config) {
put_events_file(dir_path);
closedir(evt_dir);
closedir(sys_dir);
path = zalloc(sizeof(*path));
if (!path)
return NULL;
if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
free(path);
return NULL;
}
if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
zfree(&path->system);
free(path);
return NULL;
}
return path;
}
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
return NULL;
}
struct tracepoint_path *tracepoint_name_to_path(const char *name)
{
struct tracepoint_path *path = zalloc(sizeof(*path));
char *str = strchr(name, ':');
if (path == NULL || str == NULL) {
free(path);
return NULL;
}
path->system = strndup(name, str - name);
path->name = strdup(str+1);
if (path->system == NULL || path->name == NULL) {
zfree(&path->system);
zfree(&path->name);
zfree(&path);
}
return path;
}
const char *event_type(int type)
{
switch (type) {
@ -2665,571 +2531,6 @@ int exclude_perf(const struct option *opt,
NULL);
}
static const char * const event_type_descriptors[] = {
"Hardware event",
"Software event",
"Tracepoint event",
"Hardware cache event",
"Raw hardware event descriptor",
"Hardware breakpoint",
};
static int cmp_string(const void *a, const void *b)
{
const char * const *as = a;
const char * const *bs = b;
return strcmp(*as, *bs);
}
/*
* Print the events from <debugfs_mount_point>/tracing/events
*/
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
bool name_only)
{
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char evt_path[MAXPATHLEN];
char *dir_path;
char **evt_list = NULL;
unsigned int evt_i = 0, evt_num = 0;
bool evt_num_known = false;
restart:
sys_dir = tracing_events__opendir();
if (!sys_dir)
return;
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_close_sys_dir;
}
for_each_subsystem(sys_dir, sys_dirent) {
if (subsys_glob != NULL &&
!strglobmatch(sys_dirent->d_name, subsys_glob))
continue;
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
if (event_glob != NULL &&
!strglobmatch(evt_dirent->d_name, event_glob))
continue;
if (!evt_num_known) {
evt_num++;
continue;
}
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent->d_name, evt_dirent->d_name);
evt_list[evt_i] = strdup(evt_path);
if (evt_list[evt_i] == NULL) {
put_events_file(dir_path);
goto out_close_evt_dir;
}
evt_i++;
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++],
event_type_descriptors[PERF_TYPE_TRACEPOINT]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
return;
out_close_evt_dir:
closedir(evt_dir);
out_close_sys_dir:
closedir(sys_dir);
printf("FATAL: not enough memory to print %s\n",
event_type_descriptors[PERF_TYPE_TRACEPOINT]);
if (evt_list)
goto out_free;
}
/*
* Check whether event is in <debugfs_mount_point>/tracing/events
*/
int is_valid_tracepoint(const char *event_string)
{
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char evt_path[MAXPATHLEN];
char *dir_path;
sys_dir = tracing_events__opendir();
if (!sys_dir)
return 0;
for_each_subsystem(sys_dir, sys_dirent) {
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent->d_name, evt_dirent->d_name);
if (!strcmp(evt_path, event_string)) {
closedir(evt_dir);
closedir(sys_dir);
return 1;
}
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
return 0;
}
static bool is_event_supported(u8 type, u64 config)
{
bool ret = true;
int open_return;
struct evsel *evsel;
struct perf_event_attr attr = {
.type = type,
.config = config,
.disabled = 1,
};
struct perf_thread_map *tmap = thread_map__new_by_tid(0);
if (tmap == NULL)
return false;
evsel = evsel__new(&attr);
if (evsel) {
open_return = evsel__open(evsel, NULL, tmap);
ret = open_return >= 0;
if (open_return == -EACCES) {
/*
* This happens if the paranoid value
* /proc/sys/kernel/perf_event_paranoid is set to 2
* Re-run with exclude_kernel set; we don't do that
* by default as some ARM machines do not support it.
*
*/
evsel->core.attr.exclude_kernel = 1;
ret = evsel__open(evsel, NULL, tmap) >= 0;
}
evsel__delete(evsel);
}
perf_thread_map__put(tmap);
return ret;
}
void print_sdt_events(const char *subsys_glob, const char *event_glob,
bool name_only)
{
struct probe_cache *pcache;
struct probe_cache_entry *ent;
struct strlist *bidlist, *sdtlist;
struct strlist_config cfg = {.dont_dupstr = true};
struct str_node *nd, *nd2;
char *buf, *path, *ptr = NULL;
bool show_detail = false;
int ret;
sdtlist = strlist__new(NULL, &cfg);
if (!sdtlist) {
pr_debug("Failed to allocate new strlist for SDT\n");
return;
}
bidlist = build_id_cache__list_all(true);
if (!bidlist) {
pr_debug("Failed to get buildids: %d\n", errno);
return;
}
strlist__for_each_entry(nd, bidlist) {
pcache = probe_cache__new(nd->s, NULL);
if (!pcache)
continue;
list_for_each_entry(ent, &pcache->entries, node) {
if (!ent->sdt)
continue;
if (subsys_glob &&
!strglobmatch(ent->pev.group, subsys_glob))
continue;
if (event_glob &&
!strglobmatch(ent->pev.event, event_glob))
continue;
ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
ent->pev.event, nd->s);
if (ret > 0)
strlist__add(sdtlist, buf);
}
probe_cache__delete(pcache);
}
strlist__delete(bidlist);
strlist__for_each_entry(nd, sdtlist) {
buf = strchr(nd->s, '@');
if (buf)
*(buf++) = '\0';
if (name_only) {
printf("%s ", nd->s);
continue;
}
nd2 = strlist__next(nd);
if (nd2) {
ptr = strchr(nd2->s, '@');
if (ptr)
*ptr = '\0';
if (strcmp(nd->s, nd2->s) == 0)
show_detail = true;
}
if (show_detail) {
path = build_id_cache__origname(buf);
ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
if (ret > 0) {
printf(" %-50s [%s]\n", buf, "SDT event");
free(buf);
}
free(path);
} else
printf(" %-50s [%s]\n", nd->s, "SDT event");
if (nd2) {
if (strcmp(nd->s, nd2->s) != 0)
show_detail = false;
if (ptr)
*ptr = '@';
}
}
strlist__delete(sdtlist);
}
int print_hwcache_events(const char *event_glob, bool name_only)
{
unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0;
char name[64], new_name[128];
char **evt_list = NULL, **evt_pmus = NULL;
bool evt_num_known = false;
struct perf_pmu *pmu = NULL;
if (perf_pmu__has_hybrid()) {
npmus = perf_pmu__hybrid_pmu_num();
evt_pmus = zalloc(sizeof(char *) * npmus);
if (!evt_pmus)
goto out_enomem;
}
restart:
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_enomem;
}
for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
/* skip invalid cache type */
if (!evsel__is_cache_op_valid(type, op))
continue;
for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
unsigned int hybrid_supported = 0, j;
bool supported;
__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
if (event_glob != NULL && !strglobmatch(name, event_glob))
continue;
if (!perf_pmu__has_hybrid()) {
if (!is_event_supported(PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16))) {
continue;
}
} else {
perf_pmu__for_each_hybrid_pmu(pmu) {
if (!evt_num_known) {
evt_num++;
continue;
}
supported = is_event_supported(
PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16) |
((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
if (supported) {
snprintf(new_name, sizeof(new_name), "%s/%s/",
pmu->name, name);
evt_pmus[hybrid_supported] = strdup(new_name);
hybrid_supported++;
}
}
if (hybrid_supported == 0)
continue;
}
if (!evt_num_known) {
evt_num++;
continue;
}
if ((hybrid_supported == 0) ||
(hybrid_supported == npmus)) {
evt_list[evt_i] = strdup(name);
if (npmus > 0) {
for (j = 0; j < npmus; j++)
zfree(&evt_pmus[j]);
}
} else {
for (j = 0; j < hybrid_supported; j++) {
evt_list[evt_i++] = evt_pmus[j];
evt_pmus[j] = NULL;
}
continue;
}
if (evt_list[evt_i] == NULL)
goto out_enomem;
evt_i++;
}
}
}
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
for (evt_i = 0; evt_i < evt_num; evt_i++) {
if (!evt_list[evt_i])
break;
}
evt_num = evt_i;
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++],
event_type_descriptors[PERF_TYPE_HW_CACHE]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
for (evt_i = 0; evt_i < npmus; evt_i++)
zfree(&evt_pmus[evt_i]);
zfree(&evt_pmus);
return evt_num;
out_enomem:
printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
if (evt_list)
goto out_free;
return evt_num;
}
static void print_tool_event(const struct event_symbol *syms, const char *event_glob,
bool name_only)
{
if (syms->symbol == NULL)
return;
if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
(syms->alias && strglobmatch(syms->alias, event_glob))))
return;
if (name_only)
printf("%s ", syms->symbol);
else {
char name[MAX_NAME_LEN];
if (syms->alias && strlen(syms->alias))
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
else
strlcpy(name, syms->symbol, MAX_NAME_LEN);
printf(" %-50s [%s]\n", name, "Tool event");
}
}
void print_tool_events(const char *event_glob, bool name_only)
{
// Start at 1 because the first enum entry symbols no tool event
for (int i = 1; i < PERF_TOOL_MAX; ++i) {
print_tool_event(event_symbols_tool + i, event_glob, name_only);
}
if (pager_in_use())
printf("\n");
}
void print_symbol_events(const char *event_glob, unsigned type,
struct event_symbol *syms, unsigned max,
bool name_only)
{
unsigned int i, evt_i = 0, evt_num = 0;
char name[MAX_NAME_LEN];
char **evt_list = NULL;
bool evt_num_known = false;
restart:
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_enomem;
syms -= max;
}
for (i = 0; i < max; i++, syms++) {
/*
* New attr.config still not supported here, the latest
* example was PERF_COUNT_SW_CGROUP_SWITCHES
*/
if (syms->symbol == NULL)
continue;
if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
(syms->alias && strglobmatch(syms->alias, event_glob))))
continue;
if (!is_event_supported(type, i))
continue;
if (!evt_num_known) {
evt_num++;
continue;
}
if (!name_only && strlen(syms->alias))
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
else
strlcpy(name, syms->symbol, MAX_NAME_LEN);
evt_list[evt_i] = strdup(name);
if (evt_list[evt_i] == NULL)
goto out_enomem;
evt_i++;
}
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
return;
out_enomem:
printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
if (evt_list)
goto out_free;
}
/*
* Print the help text for the event symbols:
*/
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc, bool details_flag, bool deprecated,
const char *pmu_name)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
print_tool_events(event_glob, name_only);
print_hwcache_events(event_glob, name_only);
print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
details_flag, deprecated, pmu_name);
if (event_glob != NULL)
return;
if (!name_only) {
printf(" %-50s [%s]\n",
"rNNN",
event_type_descriptors[PERF_TYPE_RAW]);
printf(" %-50s [%s]\n",
"cpu/t1=v1[,t2=v2,t3 ...]/modifier",
event_type_descriptors[PERF_TYPE_RAW]);
if (pager_in_use())
printf(" (see 'man perf-list' on how to encode it)\n\n");
printf(" %-50s [%s]\n",
"mem:<addr>[/len][:access]",
event_type_descriptors[PERF_TYPE_BREAKPOINT]);
if (pager_in_use())
printf("\n");
}
print_tracepoint_events(NULL, NULL, name_only);
print_sdt_events(NULL, NULL, name_only);
metricgroup__print(true, true, NULL, name_only, details_flag,
pmu_name);
print_libpfm_events(name_only, long_desc);
}
int parse_events__is_hardcoded_term(struct parse_events_term *term)
{
return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;

31
tools/perf/util/parse-events.h
View File

@ -11,7 +11,6 @@
#include <linux/perf_event.h>
#include <string.h>
struct list_head;
struct evsel;
struct evlist;
struct parse_events_error;
@ -19,14 +18,6 @@ struct parse_events_error;
struct option;
struct perf_pmu;
struct tracepoint_path {
char *system;
char *name;
struct tracepoint_path *next;
};
struct tracepoint_path *tracepoint_id_to_path(u64 config);
struct tracepoint_path *tracepoint_name_to_path(const char *name);
bool have_tracepoints(struct list_head *evlist);
const char *event_type(int type);
@ -46,8 +37,6 @@ int parse_events_terms(struct list_head *terms, const char *str);
int parse_filter(const struct option *opt, const char *str, int unset);
int exclude_perf(const struct option *opt, const char *arg, int unset);
#define EVENTS_HELP_MAX (128*1024)
enum perf_pmu_event_symbol_type {
PMU_EVENT_SYMBOL_ERR, /* not a PMU EVENT */
PMU_EVENT_SYMBOL, /* normal style PMU event */
@ -56,11 +45,6 @@ enum perf_pmu_event_symbol_type {
PMU_EVENT_SYMBOL_SUFFIX2, /* suffix of pre-suf2 style event */
};
struct perf_pmu_event_symbol {
char *symbol;
enum perf_pmu_event_symbol_type type;
};
enum {
PARSE_EVENTS__TERM_TYPE_NUM,
PARSE_EVENTS__TERM_TYPE_STR,
@ -219,28 +203,13 @@ void parse_events_update_lists(struct list_head *list_event,
void parse_events_evlist_error(struct parse_events_state *parse_state,
int idx, const char *str);
void print_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc, bool details_flag, bool deprecated,
const char *pmu_name);
struct event_symbol {
const char *symbol;
const char *alias;
};
extern struct event_symbol event_symbols_hw[];
extern struct event_symbol event_symbols_sw[];
void print_symbol_events(const char *event_glob, unsigned type,
struct event_symbol *syms, unsigned max,
bool name_only);
void print_tool_events(const char *event_glob, bool name_only);
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
bool name_only);
int print_hwcache_events(const char *event_glob, bool name_only);
void print_sdt_events(const char *subsys_glob, const char *event_glob,
bool name_only);
int is_valid_tracepoint(const char *event_string);
int valid_event_mount(const char *eventfs);
char *parse_events_formats_error_string(char *additional_terms);
void parse_events_error__init(struct parse_events_error *err);

572
tools/perf/util/print-events.c Normal file
View File

@ -0,0 +1,572 @@
// SPDX-License-Identifier: GPL-2.0
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <api/fs/tracing_path.h>
#include <linux/stddef.h>
#include <linux/perf_event.h>
#include <linux/zalloc.h>
#include <subcmd/pager.h>
#include "build-id.h"
#include "debug.h"
#include "evsel.h"
#include "metricgroup.h"
#include "parse-events.h"
#include "pmu.h"
#include "print-events.h"
#include "probe-file.h"
#include "string2.h"
#include "strlist.h"
#include "thread_map.h"
#include "tracepoint.h"
#include "pfm.h"
#include "pmu-hybrid.h"
#define MAX_NAME_LEN 100
static const char * const event_type_descriptors[] = {
"Hardware event",
"Software event",
"Tracepoint event",
"Hardware cache event",
"Raw hardware event descriptor",
"Hardware breakpoint",
};
static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = {
[PERF_TOOL_DURATION_TIME] = {
.symbol = "duration_time",
.alias = "",
},
[PERF_TOOL_USER_TIME] = {
.symbol = "user_time",
.alias = "",
},
[PERF_TOOL_SYSTEM_TIME] = {
.symbol = "system_time",
.alias = "",
},
};
static int cmp_string(const void *a, const void *b)
{
const char * const *as = a;
const char * const *bs = b;
return strcmp(*as, *bs);
}
/*
* Print the events from <debugfs_mount_point>/tracing/events
*/
void print_tracepoint_events(const char *subsys_glob,
const char *event_glob, bool name_only)
{
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char evt_path[MAXPATHLEN];
char *dir_path;
char **evt_list = NULL;
unsigned int evt_i = 0, evt_num = 0;
bool evt_num_known = false;
restart:
sys_dir = tracing_events__opendir();
if (!sys_dir)
return;
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_close_sys_dir;
}
for_each_subsystem(sys_dir, sys_dirent) {
if (subsys_glob != NULL &&
!strglobmatch(sys_dirent->d_name, subsys_glob))
continue;
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
if (event_glob != NULL &&
!strglobmatch(evt_dirent->d_name, event_glob))
continue;
if (!evt_num_known) {
evt_num++;
continue;
}
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent->d_name, evt_dirent->d_name);
evt_list[evt_i] = strdup(evt_path);
if (evt_list[evt_i] == NULL) {
put_events_file(dir_path);
goto out_close_evt_dir;
}
evt_i++;
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++],
event_type_descriptors[PERF_TYPE_TRACEPOINT]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
return;
out_close_evt_dir:
closedir(evt_dir);
out_close_sys_dir:
closedir(sys_dir);
printf("FATAL: not enough memory to print %s\n",
event_type_descriptors[PERF_TYPE_TRACEPOINT]);
if (evt_list)
goto out_free;
}
void print_sdt_events(const char *subsys_glob, const char *event_glob,
bool name_only)
{
struct probe_cache *pcache;
struct probe_cache_entry *ent;
struct strlist *bidlist, *sdtlist;
struct strlist_config cfg = {.dont_dupstr = true};
struct str_node *nd, *nd2;
char *buf, *path, *ptr = NULL;
bool show_detail = false;
int ret;
sdtlist = strlist__new(NULL, &cfg);
if (!sdtlist) {
pr_debug("Failed to allocate new strlist for SDT\n");
return;
}
bidlist = build_id_cache__list_all(true);
if (!bidlist) {
pr_debug("Failed to get buildids: %d\n", errno);
return;
}
strlist__for_each_entry(nd, bidlist) {
pcache = probe_cache__new(nd->s, NULL);
if (!pcache)
continue;
list_for_each_entry(ent, &pcache->entries, node) {
if (!ent->sdt)
continue;
if (subsys_glob &&
!strglobmatch(ent->pev.group, subsys_glob))
continue;
if (event_glob &&
!strglobmatch(ent->pev.event, event_glob))
continue;
ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
ent->pev.event, nd->s);
if (ret > 0)
strlist__add(sdtlist, buf);
}
probe_cache__delete(pcache);
}
strlist__delete(bidlist);
strlist__for_each_entry(nd, sdtlist) {
buf = strchr(nd->s, '@');
if (buf)
*(buf++) = '\0';
if (name_only) {
printf("%s ", nd->s);
continue;
}
nd2 = strlist__next(nd);
if (nd2) {
ptr = strchr(nd2->s, '@');
if (ptr)
*ptr = '\0';
if (strcmp(nd->s, nd2->s) == 0)
show_detail = true;
}
if (show_detail) {
path = build_id_cache__origname(buf);
ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
if (ret > 0) {
printf(" %-50s [%s]\n", buf, "SDT event");
free(buf);
}
free(path);
} else
printf(" %-50s [%s]\n", nd->s, "SDT event");
if (nd2) {
if (strcmp(nd->s, nd2->s) != 0)
show_detail = false;
if (ptr)
*ptr = '@';
}
}
strlist__delete(sdtlist);
}
static bool is_event_supported(u8 type, unsigned int config)
{
bool ret = true;
int open_return;
struct evsel *evsel;
struct perf_event_attr attr = {
.type = type,
.config = config,
.disabled = 1,
};
struct perf_thread_map *tmap = thread_map__new_by_tid(0);
if (tmap == NULL)
return false;
evsel = evsel__new(&attr);
if (evsel) {
open_return = evsel__open(evsel, NULL, tmap);
ret = open_return >= 0;
if (open_return == -EACCES) {
/*
* This happens if the paranoid value
* /proc/sys/kernel/perf_event_paranoid is set to 2
* Re-run with exclude_kernel set; we don't do that
* by default as some ARM machines do not support it.
*
*/
evsel->core.attr.exclude_kernel = 1;
ret = evsel__open(evsel, NULL, tmap) >= 0;
}
evsel__delete(evsel);
}
perf_thread_map__put(tmap);
return ret;
}
int print_hwcache_events(const char *event_glob, bool name_only)
{
unsigned int type, op, i, evt_i = 0, evt_num = 0, npmus = 0;
char name[64], new_name[128];
char **evt_list = NULL, **evt_pmus = NULL;
bool evt_num_known = false;
struct perf_pmu *pmu = NULL;
if (perf_pmu__has_hybrid()) {
npmus = perf_pmu__hybrid_pmu_num();
evt_pmus = zalloc(sizeof(char *) * npmus);
if (!evt_pmus)
goto out_enomem;
}
restart:
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_enomem;
}
for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
/* skip invalid cache type */
if (!evsel__is_cache_op_valid(type, op))
continue;
for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
unsigned int hybrid_supported = 0, j;
bool supported;
__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
if (event_glob != NULL && !strglobmatch(name, event_glob))
continue;
if (!perf_pmu__has_hybrid()) {
if (!is_event_supported(PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16))) {
continue;
}
} else {
perf_pmu__for_each_hybrid_pmu(pmu) {
if (!evt_num_known) {
evt_num++;
continue;
}
supported = is_event_supported(
PERF_TYPE_HW_CACHE,
type | (op << 8) | (i << 16) |
((__u64)pmu->type << PERF_PMU_TYPE_SHIFT));
if (supported) {
snprintf(new_name, sizeof(new_name),
"%s/%s/", pmu->name, name);
evt_pmus[hybrid_supported] =
strdup(new_name);
hybrid_supported++;
}
}
if (hybrid_supported == 0)
continue;
}
if (!evt_num_known) {
evt_num++;
continue;
}
if ((hybrid_supported == 0) ||
(hybrid_supported == npmus)) {
evt_list[evt_i] = strdup(name);
if (npmus > 0) {
for (j = 0; j < npmus; j++)
zfree(&evt_pmus[j]);
}
} else {
for (j = 0; j < hybrid_supported; j++) {
evt_list[evt_i++] = evt_pmus[j];
evt_pmus[j] = NULL;
}
continue;
}
if (evt_list[evt_i] == NULL)
goto out_enomem;
evt_i++;
}
}
}
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
for (evt_i = 0; evt_i < evt_num; evt_i++) {
if (!evt_list[evt_i])
break;
}
evt_num = evt_i;
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++],
event_type_descriptors[PERF_TYPE_HW_CACHE]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
for (evt_i = 0; evt_i < npmus; evt_i++)
zfree(&evt_pmus[evt_i]);
zfree(&evt_pmus);
return evt_num;
out_enomem:
printf("FATAL: not enough memory to print %s\n",
event_type_descriptors[PERF_TYPE_HW_CACHE]);
if (evt_list)
goto out_free;
return evt_num;
}
static void print_tool_event(const struct event_symbol *syms, const char *event_glob,
bool name_only)
{
if (syms->symbol == NULL)
return;
if (event_glob && !(strglobmatch(syms->symbol, event_glob) ||
(syms->alias && strglobmatch(syms->alias, event_glob))))
return;
if (name_only)
printf("%s ", syms->symbol);
else {
char name[MAX_NAME_LEN];
if (syms->alias && strlen(syms->alias))
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
else
strlcpy(name, syms->symbol, MAX_NAME_LEN);
printf(" %-50s [%s]\n", name, "Tool event");
}
}
void print_tool_events(const char *event_glob, bool name_only)
{
// Start at 1 because the first enum entry means no tool event.
for (int i = 1; i < PERF_TOOL_MAX; ++i)
print_tool_event(event_symbols_tool + i, event_glob, name_only);
if (pager_in_use())
printf("\n");
}
void print_symbol_events(const char *event_glob, unsigned int type,
struct event_symbol *syms, unsigned int max,
bool name_only)
{
unsigned int i, evt_i = 0, evt_num = 0;
char name[MAX_NAME_LEN];
char **evt_list = NULL;
bool evt_num_known = false;
restart:
if (evt_num_known) {
evt_list = zalloc(sizeof(char *) * evt_num);
if (!evt_list)
goto out_enomem;
syms -= max;
}
for (i = 0; i < max; i++, syms++) {
/*
* New attr.config still not supported here, the latest
* example was PERF_COUNT_SW_CGROUP_SWITCHES
*/
if (syms->symbol == NULL)
continue;
if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
(syms->alias && strglobmatch(syms->alias, event_glob))))
continue;
if (!is_event_supported(type, i))
continue;
if (!evt_num_known) {
evt_num++;
continue;
}
if (!name_only && strlen(syms->alias))
snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
else
strlcpy(name, syms->symbol, MAX_NAME_LEN);
evt_list[evt_i] = strdup(name);
if (evt_list[evt_i] == NULL)
goto out_enomem;
evt_i++;
}
if (!evt_num_known) {
evt_num_known = true;
goto restart;
}
qsort(evt_list, evt_num, sizeof(char *), cmp_string);
evt_i = 0;
while (evt_i < evt_num) {
if (name_only) {
printf("%s ", evt_list[evt_i++]);
continue;
}
printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
}
if (evt_num && pager_in_use())
printf("\n");
out_free:
evt_num = evt_i;
for (evt_i = 0; evt_i < evt_num; evt_i++)
zfree(&evt_list[evt_i]);
zfree(&evt_list);
return;
out_enomem:
printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
if (evt_list)
goto out_free;
}
/*
* Print the help text for the event symbols:
*/
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc, bool details_flag, bool deprecated,
const char *pmu_name)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
print_tool_events(event_glob, name_only);
print_hwcache_events(event_glob, name_only);
print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
details_flag, deprecated, pmu_name);
if (event_glob != NULL)
return;
if (!name_only) {
printf(" %-50s [%s]\n",
"rNNN",
event_type_descriptors[PERF_TYPE_RAW]);
printf(" %-50s [%s]\n",
"cpu/t1=v1[,t2=v2,t3 ...]/modifier",
event_type_descriptors[PERF_TYPE_RAW]);
if (pager_in_use())
printf(" (see 'man perf-list' on how to encode it)\n\n");
printf(" %-50s [%s]\n",
"mem:<addr>[/len][:access]",
event_type_descriptors[PERF_TYPE_BREAKPOINT]);
if (pager_in_use())
printf("\n");
}
print_tracepoint_events(NULL, NULL, name_only);
print_sdt_events(NULL, NULL, name_only);
metricgroup__print(true, true, NULL, name_only, details_flag,
pmu_name);
print_libpfm_events(name_only, long_desc);
}

22
tools/perf/util/print-events.h Normal file
View File

@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_PRINT_EVENTS_H
#define __PERF_PRINT_EVENTS_H
#include <stdbool.h>
struct event_symbol;
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc, bool details_flag, bool deprecated,
const char *pmu_name);
int print_hwcache_events(const char *event_glob, bool name_only);
void print_sdt_events(const char *subsys_glob, const char *event_glob,
bool name_only);
void print_symbol_events(const char *event_glob, unsigned int type,
struct event_symbol *syms, unsigned int max,
bool name_only);
void print_tool_events(const char *event_glob, bool name_only);
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
bool name_only);
#endif /* __PERF_PRINT_EVENTS_H */

96
tools/perf/util/trace-event-info.c
View File

@ -19,16 +19,24 @@
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <internal/lib.h> // page_size
#include <sys/param.h>
#include "trace-event.h"
#include "tracepoint.h"
#include <api/fs/tracing_path.h>
#include "evsel.h"
#include "debug.h"
#define VERSION "0.6"
#define MAX_EVENT_LENGTH 512
static int output_fd;
struct tracepoint_path {
char *system;
char *name;
struct tracepoint_path *next;
};
int bigendian(void)
{
@ -400,6 +408,94 @@ put_tracepoints_path(struct tracepoint_path *tps)
}
}
static struct tracepoint_path *tracepoint_id_to_path(u64 config)
{
struct tracepoint_path *path = NULL;
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char id_buf[24];
int fd;
u64 id;
char evt_path[MAXPATHLEN];
char *dir_path;
sys_dir = tracing_events__opendir();
if (!sys_dir)
return NULL;
for_each_subsystem(sys_dir, sys_dirent) {
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
evt_dirent->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
continue;
if (read(fd, id_buf, sizeof(id_buf)) < 0) {
close(fd);
continue;
}
close(fd);
id = atoll(id_buf);
if (id == config) {
put_events_file(dir_path);
closedir(evt_dir);
closedir(sys_dir);
path = zalloc(sizeof(*path));
if (!path)
return NULL;
if (asprintf(&path->system, "%.*s",
MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
free(path);
return NULL;
}
if (asprintf(&path->name, "%.*s",
MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
zfree(&path->system);
free(path);
return NULL;
}
return path;
}
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
return NULL;
}
static struct tracepoint_path *tracepoint_name_to_path(const char *name)
{
struct tracepoint_path *path = zalloc(sizeof(*path));
char *str = strchr(name, ':');
if (path == NULL || str == NULL) {
free(path);
return NULL;
}
path->system = strndup(name, str - name);
path->name = strdup(str+1);
if (path->system == NULL || path->name == NULL) {
zfree(&path->system);
zfree(&path->name);
zfree(&path);
}
return path;
}
static struct tracepoint_path *
get_tracepoints_path(struct list_head *pattrs)
{

63
tools/perf/util/tracepoint.c Normal file
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// SPDX-License-Identifier: GPL-2.0
#include "tracepoint.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/param.h>
#include <unistd.h>
#include <api/fs/tracing_path.h>
int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
{
char evt_path[MAXPATHLEN];
int fd;
snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
return -EINVAL;
close(fd);
return 0;
}
/*
* Check whether event is in <debugfs_mount_point>/tracing/events
*/
int is_valid_tracepoint(const char *event_string)
{
DIR *sys_dir, *evt_dir;
struct dirent *sys_dirent, *evt_dirent;
char evt_path[MAXPATHLEN];
char *dir_path;
sys_dir = tracing_events__opendir();
if (!sys_dir)
return 0;
for_each_subsystem(sys_dir, sys_dirent) {
dir_path = get_events_file(sys_dirent->d_name);
if (!dir_path)
continue;
evt_dir = opendir(dir_path);
if (!evt_dir)
goto next;
for_each_event(dir_path, evt_dir, evt_dirent) {
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent->d_name, evt_dirent->d_name);
if (!strcmp(evt_path, event_string)) {
closedir(evt_dir);
closedir(sys_dir);
return 1;
}
}
closedir(evt_dir);
next:
put_events_file(dir_path);
}
closedir(sys_dir);
return 0;
}

25
tools/perf/util/tracepoint.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_TRACEPOINT_H
#define __PERF_TRACEPOINT_H
#include <dirent.h>
#include <string.h>
int tp_event_has_id(const char *dir_path, struct dirent *evt_dir);
#define for_each_event(dir_path, evt_dir, evt_dirent) \
while ((evt_dirent = readdir(evt_dir)) != NULL) \
if (evt_dirent->d_type == DT_DIR && \
(strcmp(evt_dirent->d_name, ".")) && \
(strcmp(evt_dirent->d_name, "..")) && \
(!tp_event_has_id(dir_path, evt_dirent)))
#define for_each_subsystem(sys_dir, sys_dirent) \
while ((sys_dirent = readdir(sys_dir)) != NULL) \
if (sys_dirent->d_type == DT_DIR && \
(strcmp(sys_dirent->d_name, ".")) && \
(strcmp(sys_dirent->d_name, "..")))
int is_valid_tracepoint(const char *event_string);
#endif /* __PERF_TRACEPOINT_H */