Em Sun, Dec 06, 2020 at 06:05:19PM +0100, Jiri Olsa escreveu: > Adding new control event to display all evlist events. > > The interface string for control file is 'list'. When > received, perf will scan and print current evlist into > perf record terminal. > > Example session: > > terminal 1: > # mkfifo control ack perf.pipe > # perf record --control=fifo:control,ack -D -1 --no-buffering -e > 'sched:*' -o - > perf.pipe > Events disabled > > terminal 2: > # echo list > control > > terminal 1: > # perf record --control=fifo:control,ack -D -1 --no-buffering -e > 'sched:*' -o - > perf.pipe > ... > sched:sched_kthread_stop > sched:sched_kthread_stop_ret > sched:sched_waking > sched:sched_wakeup > sched:sched_wakeup_new > sched:sched_switch > sched:sched_migrate_task > sched:sched_process_free > sched:sched_process_exit > sched:sched_wait_task > sched:sched_process_wait > sched:sched_process_fork > sched:sched_process_exec > sched:sched_stat_wait > sched:sched_stat_sleep > sched:sched_stat_iowait > sched:sched_stat_blocked > sched:sched_stat_runtime > sched:sched_pi_setprio > sched:sched_move_numa > sched:sched_stick_numa > sched:sched_swap_numa > sched:sched_wake_idle_without_ipi > dummy:HG > > This new command is handy to get real event names when > wildcards are used.
Ok, would be nice to have a verbose mode like: [acme@five ~]$ sudo ~acme/bin/perf record -e 'sched:*' sleep 0.001 [ perf record: Woken up 14 times to write data ] [ perf record: Captured and wrote 0.023 MB perf.data (16 samples) ] [acme@five ~]$ sudo ~acme/bin/perf evlist sched:sched_kthread_stop sched:sched_kthread_stop_ret sched:sched_waking sched:sched_wakeup sched:sched_wakeup_new sched:sched_switch sched:sched_migrate_task sched:sched_process_free sched:sched_process_exit sched:sched_wait_task sched:sched_process_wait sched:sched_process_fork sched:sched_process_exec sched:sched_stat_wait sched:sched_stat_sleep sched:sched_stat_iowait sched:sched_stat_blocked sched:sched_stat_runtime sched:sched_pi_setprio sched:sched_move_numa sched:sched_stick_numa sched:sched_swap_numa sched:sched_wake_idle_without_ipi # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events [acme@five ~]$ sudo ~acme/bin/perf evlist -v sched:sched_kthread_stop: type: 2, size: 120, config: 0x13f, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1 sched:sched_kthread_stop_ret: type: 2, size: 120, config: 0x13e, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_waking: type: 2, size: 120, config: 0x13d, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_wakeup: type: 2, size: 120, config: 0x13c, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_wakeup_new: type: 2, size: 120, config: 0x13b, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_switch: type: 2, size: 120, config: 0x13a, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_migrate_task: type: 2, size: 120, config: 0x139, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_process_free: type: 2, size: 120, config: 0x138, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_process_exit: type: 2, size: 120, config: 0x137, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_wait_task: type: 2, size: 120, config: 0x136, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_process_wait: type: 2, size: 120, config: 0x135, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_process_fork: type: 2, size: 120, config: 0x134, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_process_exec: type: 2, size: 120, config: 0x133, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stat_wait: type: 2, size: 120, config: 0x132, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stat_sleep: type: 2, size: 120, config: 0x131, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stat_iowait: type: 2, size: 120, config: 0x130, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stat_blocked: type: 2, size: 120, config: 0x12f, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stat_runtime: type: 2, size: 120, config: 0x12e, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_pi_setprio: type: 2, size: 120, config: 0x12d, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_move_numa: type: 2, size: 120, config: 0x12c, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_stick_numa: type: 2, size: 120, config: 0x12b, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_swap_numa: type: 2, size: 120, config: 0x12a, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 sched:sched_wake_idle_without_ipi: type: 2, size: 120, config: 0x129, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ID|CPU|PERIOD|RAW, read_format: ID, disabled: 1, inherit: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1 # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events [acme@five ~]$ Also I think we should use 'evlist' instead of 'list', to be consistent. Applied 1/3 and 2/3. - Arnaldo > Signed-off-by: Jiri Olsa <jo...@kernel.org> > --- > tools/perf/builtin-record.c | 1 + > tools/perf/builtin-stat.c | 1 + > tools/perf/util/evlist.c | 6 ++++++ > tools/perf/util/evlist.h | 2 ++ > 4 files changed, 10 insertions(+) > > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c > index 582b8fba012c..f620ed056c89 100644 > --- a/tools/perf/builtin-record.c > +++ b/tools/perf/builtin-record.c > @@ -1951,6 +1951,7 @@ static int __cmd_record(struct record *rec, int argc, > const char **argv) > case EVLIST_CTL_CMD_UNSUPPORTED: > case EVLIST_CTL_CMD_ENABLE_EVSEL: > case EVLIST_CTL_CMD_DISABLE_EVSEL: > + case EVLIST_CTL_CMD_LIST: > default: > break; > } > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c > index 6a21fb665008..56f2206b5991 100644 > --- a/tools/perf/builtin-stat.c > +++ b/tools/perf/builtin-stat.c > @@ -592,6 +592,7 @@ static void process_evlist(struct evlist *evlist, > unsigned int interval) > case EVLIST_CTL_CMD_UNSUPPORTED: > case EVLIST_CTL_CMD_ENABLE_EVSEL: > case EVLIST_CTL_CMD_DISABLE_EVSEL: > + case EVLIST_CTL_CMD_LIST: > default: > break; > } > diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c > index 05723227bebf..c05476ca2ff4 100644 > --- a/tools/perf/util/evlist.c > +++ b/tools/perf/util/evlist.c > @@ -1931,6 +1931,9 @@ static int evlist__ctlfd_recv(struct evlist *evlist, > enum evlist_ctl_cmd *cmd, > (sizeof(EVLIST_CTL_CMD_SNAPSHOT_TAG)-1))) { > *cmd = EVLIST_CTL_CMD_SNAPSHOT; > pr_debug("is snapshot\n"); > + } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_LIST_TAG, > + (sizeof(EVLIST_CTL_CMD_LIST_TAG)-1))) { > + *cmd = EVLIST_CTL_CMD_LIST; > } > } > > @@ -1995,6 +1998,9 @@ int evlist__ctlfd_process(struct evlist *evlist, enum > evlist_ctl_cmd *cmd) > pr_info("failed: can't find %s > event\n", evsel_name); > } > break; > + case EVLIST_CTL_CMD_LIST: > + evlist__for_each_entry(evlist, evsel) > + pr_info("%s\n", evsel__name(evsel)); > case EVLIST_CTL_CMD_SNAPSHOT: > break; > case EVLIST_CTL_CMD_ACK: > diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h > index e4e8ff8831a3..6b8a9918fdb2 100644 > --- a/tools/perf/util/evlist.h > +++ b/tools/perf/util/evlist.h > @@ -332,6 +332,7 @@ struct evsel *evlist__reset_weak_group(struct evlist > *evlist, struct evsel *evse > #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" > #define EVLIST_CTL_CMD_ENABLE_EVSEL_TAG "enable-" > #define EVLIST_CTL_CMD_DISABLE_EVSEL_TAG "disable-" > +#define EVLIST_CTL_CMD_LIST_TAG "list" > > #define EVLIST_CTL_CMD_MAX_LEN 64 > > @@ -343,6 +344,7 @@ enum evlist_ctl_cmd { > EVLIST_CTL_CMD_DISABLE_EVSEL, > EVLIST_CTL_CMD_ACK, > EVLIST_CTL_CMD_SNAPSHOT, > + EVLIST_CTL_CMD_LIST, > }; > > int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, > bool *ctl_fd_close); > -- > 2.26.2 > -- - Arnaldo