| Message ID | 20190314182538.1294526-3-songliubraving@fb.com |
|---|---|
| State | Not Applicable |
| Delegated to: | BPF Maintainers |
| Headers | show |
| Series | show bpf program info from perf.data header | expand |
> On Mar 14, 2019, at 11:25 AM, Song Liu <songliubraving@fb.com> wrote: > > This patch enables showing bpf program name in the header. > > Before the patch: > > perf report --header-only > ... > # bpf_prog_info of id 9 > # bpf_prog_info of id 10 > # bpf_prog_info of id 13 > > After the patch: > > # bpf_prog_info 9: bpf_prog_7be49e3934a125ba > # bpf_prog_info 10: bpf_prog_2a142ef67aaad174 > # bpf_prog_info 13: bpf_prog_47368425825d7384_task__task_newt > > Signed-off-by: Song Liu <songliubraving@fb.com> Please ignore this patch, and use the other PATCH 2/2 with address and size information instead. Thanks, Song > --- > tools/perf/util/bpf-event.c | 36 ++++++++++++++++++++++++++++++++++++ > tools/perf/util/bpf-event.h | 10 +++++++++- > tools/perf/util/header.c | 5 +++-- > 3 files changed, 48 insertions(+), 3 deletions(-) > > diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c > index 6e035e08aa2d..dde35a36e2de 100644 > --- a/tools/perf/util/bpf-event.c > +++ b/tools/perf/util/bpf-event.c > @@ -433,3 +433,39 @@ int bpf_event__add_sb_event(struct perf_evlist **evlist, > > return perf_evlist__add_sb_event(evlist, &attr, bpf_event__sb_cb, env); > } > + > +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, > + struct perf_env *env, > + FILE *fp) > +{ > + char name[KSYM_NAME_LEN]; > + struct btf *btf = NULL; > + u32 sub_prog_cnt, i; > + > + sub_prog_cnt = info->nr_jited_ksyms; > + if (sub_prog_cnt != info->nr_prog_tags || > + sub_prog_cnt != info->nr_jited_func_lens) > + return; > + > + if (info->btf_id) { > + struct btf_node *node; > + > + node = perf_env__find_btf(env, info->btf_id); > + if (node) > + btf = btf__new((__u8 *)(node->data), > + node->data_size); > + } > + > + if (sub_prog_cnt == 1) { > + synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, 0); > + fprintf(fp, "# bpf_prog_info %u: %s\n", info->id, name); > + return; > + } > + > + fprintf(fp, "# bpf_prog_info %u:\n", info->id); > + for (i = 0; i < sub_prog_cnt; i++) { > + synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, i); > + > + fprintf(fp, "# \tsub_prog %u: %s\n", i, name); > + } > +} > diff --git a/tools/perf/util/bpf-event.h b/tools/perf/util/bpf-event.h > index 249909c826e7..4270dfd9cde9 100644 > --- a/tools/perf/util/bpf-event.h > +++ b/tools/perf/util/bpf-event.h > @@ -38,7 +38,9 @@ int perf_event__synthesize_bpf_events(struct perf_session *session, > struct record_opts *opts); > int bpf_event__add_sb_event(struct perf_evlist **evlist, > struct perf_env *env); > - > +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, > + struct perf_env *env, > + FILE *fp); > #else > static inline int machine__process_bpf_event(struct machine *machine __maybe_unused, > union perf_event *event __maybe_unused, > @@ -61,5 +63,11 @@ static int bpf_event__add_sb_event(struct perf_evlist **evlist __maybe_unused, > return 0; > } > > +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, > + struct perf_env *env, > + FILE *fp) > +{ > + > +} > #endif // HAVE_LIBBPF_SUPPORT > #endif > diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c > index 7decd2d1dbda..588a80bdd500 100644 > --- a/tools/perf/util/header.c > +++ b/tools/perf/util/header.c > @@ -1434,8 +1434,9 @@ static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp) > > node = rb_entry(next, struct bpf_prog_info_node, rb_node); > next = rb_next(&node->rb_node); > - fprintf(fp, "# bpf_prog_info of id %u\n", > - node->info_linear->info.id); > + > + bpf_event__print_bpf_prog_info(&node->info_linear->info, > + env, fp); > } > > up_read(&env->bpf_progs.lock); > -- > 2.17.1 >
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c index 6e035e08aa2d..dde35a36e2de 100644 --- a/tools/perf/util/bpf-event.c +++ b/tools/perf/util/bpf-event.c @@ -433,3 +433,39 @@ int bpf_event__add_sb_event(struct perf_evlist **evlist, return perf_evlist__add_sb_event(evlist, &attr, bpf_event__sb_cb, env); } + +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, + struct perf_env *env, + FILE *fp) +{ + char name[KSYM_NAME_LEN]; + struct btf *btf = NULL; + u32 sub_prog_cnt, i; + + sub_prog_cnt = info->nr_jited_ksyms; + if (sub_prog_cnt != info->nr_prog_tags || + sub_prog_cnt != info->nr_jited_func_lens) + return; + + if (info->btf_id) { + struct btf_node *node; + + node = perf_env__find_btf(env, info->btf_id); + if (node) + btf = btf__new((__u8 *)(node->data), + node->data_size); + } + + if (sub_prog_cnt == 1) { + synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, 0); + fprintf(fp, "# bpf_prog_info %u: %s\n", info->id, name); + return; + } + + fprintf(fp, "# bpf_prog_info %u:\n", info->id); + for (i = 0; i < sub_prog_cnt; i++) { + synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, i); + + fprintf(fp, "# \tsub_prog %u: %s\n", i, name); + } +} diff --git a/tools/perf/util/bpf-event.h b/tools/perf/util/bpf-event.h index 249909c826e7..4270dfd9cde9 100644 --- a/tools/perf/util/bpf-event.h +++ b/tools/perf/util/bpf-event.h @@ -38,7 +38,9 @@ int perf_event__synthesize_bpf_events(struct perf_session *session, struct record_opts *opts); int bpf_event__add_sb_event(struct perf_evlist **evlist, struct perf_env *env); - +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, + struct perf_env *env, + FILE *fp); #else static inline int machine__process_bpf_event(struct machine *machine __maybe_unused, union perf_event *event __maybe_unused, @@ -61,5 +63,11 @@ static int bpf_event__add_sb_event(struct perf_evlist **evlist __maybe_unused, return 0; } +void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info, + struct perf_env *env, + FILE *fp) +{ + +} #endif // HAVE_LIBBPF_SUPPORT #endif diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 7decd2d1dbda..588a80bdd500 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1434,8 +1434,9 @@ static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp) node = rb_entry(next, struct bpf_prog_info_node, rb_node); next = rb_next(&node->rb_node); - fprintf(fp, "# bpf_prog_info of id %u\n", - node->info_linear->info.id); + + bpf_event__print_bpf_prog_info(&node->info_linear->info, + env, fp); } up_read(&env->bpf_progs.lock);
This patch enables showing bpf program name in the header. Before the patch: perf report --header-only ... # bpf_prog_info of id 9 # bpf_prog_info of id 10 # bpf_prog_info of id 13 After the patch: # bpf_prog_info 9: bpf_prog_7be49e3934a125ba # bpf_prog_info 10: bpf_prog_2a142ef67aaad174 # bpf_prog_info 13: bpf_prog_47368425825d7384_task__task_newt Signed-off-by: Song Liu <songliubraving@fb.com> --- tools/perf/util/bpf-event.c | 36 ++++++++++++++++++++++++++++++++++++ tools/perf/util/bpf-event.h | 10 +++++++++- tools/perf/util/header.c | 5 +++-- 3 files changed, 48 insertions(+), 3 deletions(-)