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Subject[PATCH 11/12] perf script: Add support for H/W and S/W events
Date
From: David Ahern <daahern@cisco.com>

Custom fields set for each type by prepending field argument with type.
For file with multiple event types (e.g., trace and S/W) display of an
event type suppressed by setting output fields to "".

e.g.,
perf record -ga -e sched:sched_switch -e cpu-clock -c 10000000 -R -- sleep 1
perf script
openssl 11496 [000] 9711.807107: cpu-clock-msecs:
ffffffff810c22dc arch_local_irq_restore ([kernel.kallsyms])
ffffffff810c518c __alloc_pages_nodemask ([kernel.kallsyms])
ffffffff810297b2 pte_alloc_one ([kernel.kallsyms])
ffffffff810d8b98 __pte_alloc ([kernel.kallsyms])
ffffffff810daf07 handle_mm_fault ([kernel.kallsyms])
ffffffff8138763a do_page_fault ([kernel.kallsyms])
ffffffff81384a65 page_fault ([kernel.kallsyms])
7f6130507d70 asn1_check_tlen (/lib64/libcrypto.so.1.0.0c)
0 ()
openssl 11496 [000] 9711.808042: sched_switch: prev_comm=openssl ...
kworker/0:0 4 [000] 9711.808067: sched_switch: prev_comm=kworker/...
swapper 0 [001] 9711.808090: sched_switch: prev_comm=kworker/...
sshd 11451 [001] 9711.808185: sched_switch: prev_comm=sshd pre...
swapper 0 [001] 9711.816155: cpu-clock-msecs:
ffffffff81023609 native_safe_halt ([kernel.kallsyms])
ffffffff8100132a cpu_idle ([kernel.kallsyms])
ffffffff8137cf9b start_secondary ([kernel.kallsyms])
openssl 11496 [000] 9711.817104: cpu-clock-msecs:
7f61304ad723 AES_cbc_encrypt (/lib64/libcrypto.so.1.0.0c)
7fff3402f950 ()
12f0debc9a785634 ()

swapper 0 [001] 9711.826155: cpu-clock-msecs:
ffffffff81023609 native_safe_halt ([kernel.kallsyms])
ffffffff8100132a cpu_idle ([kernel.kallsyms])
ffffffff8137cf9b start_secondary ([kernel.kallsyms])
To suppress trace events within the file and use default output for S/W events:
perf script -f trace:

or to suppress S/W events and do default display for trace events:
perf script -f sw:

Custom field selections:
perf script -f sw:comm,tid,time -f trace:time,trace

openssl 11496 9711.797162:
swapper 0 9711.807071:
openssl 11496 9711.807107:
9711.808042: prev_comm=openssl prev_pid=11496 prev_prio=120 prev_state=R ...
9711.808067: prev_comm=kworker/0:0 prev_pid=4 prev_prio=120 prev_state=S ...
9711.808090: prev_comm=kworker/0:0 prev_pid=0 prev_prio=120 prev_state=R ...
9711.808185: prev_comm=sshd prev_pid=11451 prev_prio=120 prev_state=S ==>...
swapper 0 9711.816155:
openssl 11496 9711.817104:
swapper 0 9711.826155:

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: <1299734608-5223-7-git-send-email-daahern@cisco.com>
Signed-off-by: David Ahern <daahern@cisco.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-script.txt | 5 +-
tools/perf/builtin-script.c | 155 +++++++++++++++++++++++-------
tools/perf/util/parse-events.c | 22 ++++
tools/perf/util/parse-events.h | 1 +
4 files changed, 147 insertions(+), 36 deletions(-)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index c64118a..66f040b 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -115,7 +115,10 @@ OPTIONS
-f::
--fields
Comma separated list of fields to print. Options are:
- comm, tid, pid, time, cpu, event, trace, sym
+ comm, tid, pid, time, cpu, event, trace, sym. Field
+ list must be prepended with the type, trace, sw or hw,
+ to indicate to which event type the field list applies.
+ e.g., -f sw:comm,tid,time,sym and -f trace:time,cpu,trace

-k::
--vmlinux=<file>::
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b45b09c..9f5fc54 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -12,6 +12,8 @@
#include "util/trace-event.h"
#include "util/parse-options.h"
#include "util/util.h"
+#include "util/evlist.h"
+#include "util/evsel.h"

static char const *script_name;
static char const *generate_script_lang;
@@ -47,16 +49,65 @@ struct output_option {
};

/* 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 u64 output_fields[PERF_TYPE_MAX] = {
+ [PERF_TYPE_HARDWARE] = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | \
+ PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | \
+ PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM,
+
+ [PERF_TYPE_SOFTWARE] = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | \
+ PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | \
+ PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM,
+
+ [PERF_TYPE_TRACEPOINT] = 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)
+#define PRINT_FIELD(x) (output_fields[attr->type] & PERF_OUTPUT_##x)
+
+static int perf_session__check_attr(struct perf_session *session,
+ struct perf_event_attr *attr)
+{
+ if (PRINT_FIELD(TRACE) &&
+ !perf_session__has_traces(session, "record -R"))
+ return -EINVAL;
+
+ if (PRINT_FIELD(SYM)) {
+ if (!(session->sample_type & PERF_SAMPLE_IP)) {
+ pr_err("Samples do not contain IP data.\n");
+ return -EINVAL;
+ }
+ if (!no_callchain &&
+ !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
+ symbol_conf.use_callchain = false;
+ }
+
+ if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
+ !(session->sample_type & PERF_SAMPLE_TID)) {
+ pr_err("Samples do not contain TID/PID data.\n");
+ return -EINVAL;
+ }
+
+ if (PRINT_FIELD(TIME) &&
+ !(session->sample_type & PERF_SAMPLE_TIME)) {
+ pr_err("Samples do not contain timestamps.\n");
+ return -EINVAL;
+ }
+
+ if (PRINT_FIELD(CPU) &&
+ !(session->sample_type & PERF_SAMPLE_CPU)) {
+ pr_err("Samples do not contain cpu.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}

static void print_sample_start(struct perf_sample *sample,
- struct thread *thread)
+ struct thread *thread,
+ struct perf_event_attr *attr)
{
int type;
struct event *event;
@@ -97,10 +148,13 @@ static void print_sample_start(struct perf_sample *sample,
}

if (PRINT_FIELD(EVNAME)) {
- type = trace_parse_common_type(sample->raw_data);
- event = trace_find_event(type);
- if (event)
- evname = event->name;
+ if (attr->type == PERF_TYPE_TRACEPOINT) {
+ type = trace_parse_common_type(sample->raw_data);
+ event = trace_find_event(type);
+ if (event)
+ evname = event->name;
+ } else
+ evname = __event_name(attr->type, attr->config);

printf("%s: ", evname ? evname : "(unknown)");
}
@@ -108,10 +162,27 @@ static void print_sample_start(struct perf_sample *sample,

static void process_event(union perf_event *event __unused,
struct perf_sample *sample,
- struct perf_session *session __unused,
+ struct perf_session *session,
struct thread *thread)
{
- print_sample_start(sample, thread);
+ struct perf_event_attr *attr;
+ struct perf_evsel *evsel;
+
+ evsel = perf_evlist__id2evsel(session->evlist, sample->id);
+ if (evsel == NULL) {
+ pr_err("Invalid data. Contains samples with id not in "
+ "its header!\n");
+ return;
+ }
+ attr = &evsel->attr;
+
+ if (output_fields[attr->type] == 0)
+ return;
+
+ if (perf_session__check_attr(session, attr) < 0)
+ return;
+
+ print_sample_start(sample, thread, attr);

if (PRINT_FIELD(TRACE))
print_trace_event(sample->cpu, sample->raw_data,
@@ -183,19 +254,17 @@ static int process_sample_event(union perf_event *event,
return -1;
}

- if (session->sample_type & PERF_SAMPLE_RAW) {
- if (debug_mode) {
- if (sample->time < last_timestamp) {
- pr_err("Samples misordered, previous: %" PRIu64
- " this: %" PRIu64 "\n", last_timestamp,
- sample->time);
- nr_unordered++;
- }
- last_timestamp = sample->time;
- return 0;
+ if (debug_mode) {
+ if (sample->time < last_timestamp) {
+ pr_err("Samples misordered, previous: %" PRIu64
+ " this: %" PRIu64 "\n", last_timestamp,
+ sample->time);
+ nr_unordered++;
}
- scripting_ops->process_event(event, sample, session, thread);
+ last_timestamp = sample->time;
+ return 0;
}
+ scripting_ops->process_event(event, sample, session, thread);

session->hists.stats.total_period += sample->period;
return 0;
@@ -391,21 +460,40 @@ static int parse_output_fields(const struct option *opt __used,
int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
int rc = 0;
char *str = strdup(arg);
+ int type = -1;

if (!str)
return -ENOMEM;

- tok = strtok(str, ",");
+ tok = strtok(str, ":");
if (!tok) {
- fprintf(stderr, "Invalid field string.");
+ fprintf(stderr,
+ "Invalid field string - not prepended with type.");
+ return -EINVAL;
+ }
+
+ /* first word should state which event type user
+ * is specifying the fields
+ */
+ if (!strcmp(tok, "hw"))
+ type = PERF_TYPE_HARDWARE;
+ else if (!strcmp(tok, "sw"))
+ type = PERF_TYPE_SOFTWARE;
+ else if (!strcmp(tok, "trace"))
+ type = PERF_TYPE_TRACEPOINT;
+ else {
+ fprintf(stderr, "Invalid event type in field string.");
return -EINVAL;
}

- output_fields = 0;
+ output_fields[type] = 0;
while (1) {
+ tok = strtok(NULL, ",");
+ if (!tok)
+ break;
for (i = 0; i < imax; ++i) {
if (strcmp(tok, all_output_options[i].str) == 0) {
- output_fields |= all_output_options[i].field;
+ output_fields[type] |= all_output_options[i].field;
break;
}
}
@@ -414,10 +502,11 @@ static int parse_output_fields(const struct option *opt __used,
rc = -EINVAL;
break;
}
+ }

- tok = strtok(NULL, ",");
- if (!tok)
- break;
+ if (output_fields[type] == 0) {
+ pr_debug("No fields requested for %s type. "
+ "Events will not be displayed\n", event_type(type));
}

output_set_by_user = true;
@@ -747,7 +836,7 @@ static const struct option options[] = {
OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
"Look for files with symbols relative to this directory"),
OPT_CALLBACK('f', "fields", NULL, "str",
- "comma separated output fields. Options: comm,tid,pid,time,cpu,event,trace,sym",
+ "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace. Fields: comm,tid,pid,time,cpu,event,trace,sym",
parse_output_fields),

OPT_END()
@@ -929,15 +1018,11 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
if (session == NULL)
return -ENOMEM;

- if (!no_callchain && (session->sample_type & PERF_SAMPLE_CALLCHAIN))
+ if (!no_callchain)
symbol_conf.use_callchain = true;
else
symbol_conf.use_callchain = false;

- if (strcmp(input_name, "-") &&
- !perf_session__has_traces(session, "record -R"))
- return -EINVAL;
-
if (generate_script_lang) {
struct stat perf_stat;
int input;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 54a7e26..952b4ae 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -263,6 +263,28 @@ static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
return name;
}

+const char *event_type(int type)
+{
+ switch (type) {
+ case PERF_TYPE_HARDWARE:
+ return "hardware";
+
+ case PERF_TYPE_SOFTWARE:
+ return "software";
+
+ case PERF_TYPE_TRACEPOINT:
+ return "tracepoint";
+
+ case PERF_TYPE_HW_CACHE:
+ return "hardware-cache";
+
+ default:
+ break;
+ }
+
+ return "unknown";
+}
+
const char *event_name(struct perf_evsel *evsel)
{
u64 config = evsel->attr.config;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 212f88e..746d3fc 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -20,6 +20,7 @@ struct tracepoint_path {
extern struct tracepoint_path *tracepoint_id_to_path(u64 config);
extern bool have_tracepoints(struct list_head *evlist);

+const char *event_type(int type);
const char *event_name(struct perf_evsel *event);
extern const char *__event_name(int type, u64 config);

--
1.6.2.5


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