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perf list: Show SDT and pre-cached events

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Show SDT and pre-cached events by perf-list with "sdt". This also shows
the binary and build-id where the events are placed only when there are
same name events on different binaries.

e.g.:

  # perf list sdt

  List of pre-defined events (to be used in -e):

    sdt_libc:lll_futex_wake                            [SDT event]
    sdt_libc:lll_lock_wait_private                     [SDT event]
    sdt_libc:longjmp                                   [SDT event]
    sdt_libc:longjmp_target                            [SDT event]
  ...
    sdt_libstdcxx:rethrow@/usr/bin/gcc(0cc207fc4b27)   [SDT event]
    sdt_libstdcxx:rethrow@/usr/lib64/libstdc++.so.6.0.20(91c7a88fdf49)
    sdt_libstdcxx:throw@/usr/bin/gcc(0cc207fc4b27)     [SDT event]
    sdt_libstdcxx:throw@/usr/lib64/libstdc++.so.6.0.20(91c7a88fdf49)

The binary path and build-id are shown in below format;

  <GROUP>:<EVENT>@<PATH>(<BUILD-ID>)

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20160624090646.25421.44225.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2016-06-24 18:06:46 +09:00 committed by Arnaldo Carvalho de Melo
parent 1de7b8bf72
commit 40218daea1
4 changed files with 98 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/builtin-list.c
View File

@ -25,7 +25,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_END()
};
const char * const list_usage[] = {
"perf list [hw|sw|cache|tracepoint|pmu|event_glob]",
"perf list [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
NULL
};
@ -62,6 +62,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_hwcache_events(NULL, raw_dump);
else if (strcmp(argv[i], "pmu") == 0)
print_pmu_events(NULL, raw_dump);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
else if ((sep = strchr(argv[i], ':')) != NULL) {
int sep_idx;
@ -76,6 +78,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
s[sep_idx] = '\0';
print_tracepoint_events(s, s + sep_idx + 1, raw_dump);
print_sdt_events(s, s + sep_idx + 1, raw_dump);
free(s);
} else {
if (asprintf(&s, "*%s*", argv[i]) < 0) {
@ -89,6 +92,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_hwcache_events(s, raw_dump);
print_pmu_events(s, raw_dump);
print_tracepoint_events(NULL, s, raw_dump);
print_sdt_events(NULL, s, raw_dump);
free(s);
}
}

82
tools/perf/util/parse-events.c
View File

@ -20,6 +20,7 @@
#include "pmu.h"
#include "thread_map.h"
#include "cpumap.h"
#include "probe-file.h"
#include "asm/bug.h"
#define MAX_NAME_LEN 100
@ -1984,6 +1985,85 @@ static bool is_event_supported(u8 type, unsigned config)
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);
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);
}
} 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;
@ -2166,6 +2246,8 @@ void print_events(const char *event_glob, bool name_only)
}
print_tracepoint_events(NULL, NULL, name_only);
print_sdt_events(NULL, NULL, name_only);
}
int parse_events__is_hardcoded_term(struct parse_events_term *term)

2
tools/perf/util/parse-events.h
View File

@ -183,6 +183,8 @@ void print_symbol_events(const char *event_glob, unsigned type,
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);

9
tools/perf/util/probe-file.h
View File

@ -24,6 +24,8 @@ struct probe_cache {
#define for_each_probe_cache_entry(entry, pcache) \
list_for_each_entry(entry, &pcache->entries, node)
/* probe-file.c depends on libelf */
#ifdef HAVE_LIBELF_SUPPORT
int probe_file__open(int flag);
int probe_file__open_both(int *kfd, int *ufd, int flag);
struct strlist *probe_file__get_namelist(int fd);
@ -52,4 +54,11 @@ struct probe_cache_entry *probe_cache__find(struct probe_cache *pcache,
struct probe_cache_entry *probe_cache__find_by_name(struct probe_cache *pcache,
const char *group, const char *event);
int probe_cache__show_all_caches(struct strfilter *filter);
#else /* ! HAVE_LIBELF_SUPPORT */
static inline struct probe_cache *probe_cache__new(const char *tgt __maybe_unused)
{
return NULL;
}
#define probe_cache__delete(pcache) do {} while (0)
#endif
#endif