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perf script: Support custom field selection for output

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Allow a user to select which fields to print to stdout for event data.
Options include comm (command name), tid (thread id), pid (process id),
time (perf timestamp), cpu, event (for event name), and trace (for
trace data).

Default is set to maintain compatibility with current output; this
feature does alter output format slightly -- no '-' between command
and pid/tid.

Thanks to Frederic Weisbecker for detailed suggestions on this approach.

Examples (output compressed)

1. trace, default format

perf record -ga -e sched:sched_switch
perf script

swapper    0 [000] 537.037184: sched_switch: prev_comm=swapper prev_pid=0...
   sshd 1675 [000] 537.037309: sched_switch: prev_comm=sshd prev_pid=1675...
netstat 1692 [001] 537.038664: sched_switch: prev_comm=netstat prev_pid=1692...

2. trace, custom format

perf record -ga -e sched:sched_switch
perf script -f comm,pid,time,trace     <--- omitting cpu and event name

swapper    0 537.037184: prev_comm=swapper prev_pid=0 prev_prio=120 ...
   sshd 1675 537.037309: prev_comm=sshd prev_pid=1675 prev_prio=120 ...
netstat 1692 537.038664: prev_comm=netstat prev_pid=1692 prev_prio=120 ...

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1299734608-5223-5-git-send-email-daahern@cisco.com>
Signed-off-by: David Ahern <daahern@cisco.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2011-03-09 22:23:26 -07:00 committed by Arnaldo Carvalho de Melo
parent c70c94b474
commit 745f43e343
2 changed files with 130 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
tools/perf/Documentation/perf-script.txt
View file

@ -112,6 +112,11 @@ OPTIONS
--debug-mode::
Do various checks like samples ordering and lost events.
-f::
--fields
Comma separated list of fields to print. Options are:
comm, tid, pid, time, cpu, event, trace
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script-perl[1],

141
tools/perf/builtin-script.c
View file

@ -20,6 +20,38 @@ static u64 last_timestamp;
static u64 nr_unordered;
extern const struct option record_options[];
enum perf_output_field {
PERF_OUTPUT_COMM = 1U << 0,
PERF_OUTPUT_TID = 1U << 1,
PERF_OUTPUT_PID = 1U << 2,
PERF_OUTPUT_TIME = 1U << 3,
PERF_OUTPUT_CPU = 1U << 4,
PERF_OUTPUT_EVNAME = 1U << 5,
PERF_OUTPUT_TRACE = 1U << 6,
};
struct output_option {
const char *str;
enum perf_output_field field;
} all_output_options[] = {
{.str = "comm", .field = PERF_OUTPUT_COMM},
{.str = "tid", .field = PERF_OUTPUT_TID},
{.str = "pid", .field = PERF_OUTPUT_PID},
{.str = "time", .field = PERF_OUTPUT_TIME},
{.str = "cpu", .field = PERF_OUTPUT_CPU},
{.str = "event", .field = PERF_OUTPUT_EVNAME},
{.str = "trace", .field = PERF_OUTPUT_TRACE},
};
/* default set to maintain compatibility with current format */
static u64 output_fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | \
PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | \
PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE;
static bool output_set_by_user;
#define PRINT_FIELD(x) (output_fields & PERF_OUTPUT_##x)
static void print_sample_start(struct perf_sample *sample,
struct thread *thread)
{
@ -28,24 +60,45 @@ static void print_sample_start(struct perf_sample *sample,
const char *evname = NULL;
unsigned long secs;
unsigned long usecs;
unsigned long long nsecs = sample->time;
unsigned long long nsecs;
if (latency_format)
printf("%8.8s-%-5d %3d", thread->comm, sample->tid, sample->cpu);
else
printf("%16s-%-5d [%03d]", thread->comm, sample->tid, sample->cpu);
if (PRINT_FIELD(COMM)) {
if (latency_format)
printf("%8.8s ", thread->comm);
else
printf("%16s ", thread->comm);
}
secs = nsecs / NSECS_PER_SEC;
nsecs -= secs * NSECS_PER_SEC;
usecs = nsecs / NSECS_PER_USEC;
printf(" %5lu.%06lu: ", secs, usecs);
if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
printf("%5d/%-5d ", sample->pid, sample->tid);
else if (PRINT_FIELD(PID))
printf("%5d ", sample->pid);
else if (PRINT_FIELD(TID))
printf("%5d ", sample->tid);
type = trace_parse_common_type(sample->raw_data);
event = trace_find_event(type);
if (event)
evname = event->name;
if (PRINT_FIELD(CPU)) {
if (latency_format)
printf("%3d ", sample->cpu);
else
printf("[%03d] ", sample->cpu);
}
printf("%s: ", evname ? evname : "(unknown)");
if (PRINT_FIELD(TIME)) {
nsecs = sample->time;
secs = nsecs / NSECS_PER_SEC;
nsecs -= secs * NSECS_PER_SEC;
usecs = nsecs / NSECS_PER_USEC;
printf("%5lu.%06lu: ", secs, usecs);
}
if (PRINT_FIELD(EVNAME)) {
type = trace_parse_common_type(sample->raw_data);
event = trace_find_event(type);
if (event)
evname = event->name;
printf("%s: ", evname ? evname : "(unknown)");
}
}
static void process_event(union perf_event *event __unused,
@ -54,7 +107,11 @@ static void process_event(union perf_event *event __unused,
struct thread *thread)
{
print_sample_start(sample, thread);
print_trace_event(sample->cpu, sample->raw_data, sample->raw_size);
if (PRINT_FIELD(TRACE))
print_trace_event(sample->cpu, sample->raw_data,
sample->raw_size);
printf("\n");
}
@ -311,6 +368,48 @@ static int parse_scriptname(const struct option *opt __used,
return 0;
}
static int parse_output_fields(const struct option *opt __used,
const char *arg, int unset __used)
{
char *tok;
int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
int rc = 0;
char *str = strdup(arg);
if (!str)
return -ENOMEM;
tok = strtok(str, ",");
if (!tok) {
fprintf(stderr, "Invalid field string.");
return -EINVAL;
}
output_fields = 0;
while (1) {
for (i = 0; i < imax; ++i) {
if (strcmp(tok, all_output_options[i].str) == 0) {
output_fields |= all_output_options[i].field;
break;
}
}
if (i == imax) {
fprintf(stderr, "Invalid field requested.");
rc = -EINVAL;
break;
}
tok = strtok(NULL, ",");
if (!tok)
break;
}
output_set_by_user = true;
free(str);
return rc;
}
/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
static int is_directory(const char *base_path, const struct dirent *dent)
{
@ -623,6 +722,9 @@ static const struct option options[] = {
"input file name"),
OPT_BOOLEAN('d', "debug-mode", &debug_mode,
"do various checks like samples ordering and lost events"),
OPT_CALLBACK('f', "fields", NULL, "str",
"comma separated output fields. Options: comm,tid,pid,time,cpu,event,trace",
parse_output_fields),
OPT_END()
};
@ -809,8 +911,15 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
if (generate_script_lang) {
struct stat perf_stat;
int input;
int input = open(input_name, O_RDONLY);
if (output_set_by_user) {
fprintf(stderr,
"custom fields not supported for generated scripts");
return -1;
}
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");
exit(-1);