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Date: Fri, 1 Mar 2019 18:13:06 +0800
From: Jin Yao <yao.jin@...ux.intel.com>
To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com,
Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v2] perf util: Refactor time range parsing code
Jiri points out that we don't need any time checking and time string
parsing if the --time option is not set. That makes sense.
This patch refactors the time range parsing code, move the duplicated
code from perf report and perf script to time_utils and check if --time
option is set before parsing the time string. This patch is no logic
change expected. So the usage of --time is same as before.
For example,
Select the first and second 10% time slices:
perf report --time 10%/1,10%/2
perf script --time 10%/1,10%/2
Select the slices from 0% to 10% and from 30% to 40%:
perf report --time 0%-10%,30%-40%
perf script --time 0%-10%,30%-40%
Select the time slices from timestamp 3971 to 3973
perf report --time 3971,3973
perf script --time 3971,3973
v2:
---
Add some examples in patch description.
No functional changes.
Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
tools/perf/builtin-report.c | 38 +++++++--------------------------
tools/perf/builtin-script.c | 39 +++++++--------------------------
tools/perf/util/time-utils.c | 51 +++++++++++++++++++++++++++++++++++++++++++-
tools/perf/util/time-utils.h | 6 ++++++
4 files changed, 72 insertions(+), 62 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 1532ebd..ee93c18 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1375,36 +1375,13 @@ int cmd_report(int argc, const char **argv)
if (symbol__init(&session->header.env) < 0)
goto error;
- report.ptime_range = perf_time__range_alloc(report.time_str,
- &report.range_size);
- if (!report.ptime_range) {
- ret = -ENOMEM;
- goto error;
- }
-
- if (perf_time__parse_str(report.ptime_range, report.time_str) != 0) {
- if (session->evlist->first_sample_time == 0 &&
- session->evlist->last_sample_time == 0) {
- pr_err("HINT: no first/last sample time found in perf data.\n"
- "Please use latest perf binary to execute 'perf record'\n"
- "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
- ret = -EINVAL;
- goto error;
- }
-
- report.range_num = perf_time__percent_parse_str(
- report.ptime_range, report.range_size,
- report.time_str,
- session->evlist->first_sample_time,
- session->evlist->last_sample_time);
-
- if (report.range_num < 0) {
- pr_err("Invalid time string\n");
- ret = -EINVAL;
+ if (report.time_str) {
+ ret = perf_time__parse_for_ranges(report.time_str, session,
+ &report.ptime_range,
+ &report.range_size,
+ &report.range_num);
+ if (ret < 0)
goto error;
- }
- } else {
- report.range_num = 1;
}
if (session->tevent.pevent &&
@@ -1426,7 +1403,8 @@ int cmd_report(int argc, const char **argv)
ret = 0;
error:
- zfree(&report.ptime_range);
+ if (report.ptime_range)
+ zfree(&report.ptime_range);
perf_session__delete(session);
return ret;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 2d8cb1d..53f78cf 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3699,37 +3699,13 @@ int cmd_script(int argc, const char **argv)
if (err < 0)
goto out_delete;
- script.ptime_range = perf_time__range_alloc(script.time_str,
- &script.range_size);
- if (!script.ptime_range) {
- err = -ENOMEM;
- goto out_delete;
- }
-
- /* needs to be parsed after looking up reference time */
- if (perf_time__parse_str(script.ptime_range, script.time_str) != 0) {
- if (session->evlist->first_sample_time == 0 &&
- session->evlist->last_sample_time == 0) {
- pr_err("HINT: no first/last sample time found in perf data.\n"
- "Please use latest perf binary to execute 'perf record'\n"
- "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
- err = -EINVAL;
- goto out_delete;
- }
-
- script.range_num = perf_time__percent_parse_str(
- script.ptime_range, script.range_size,
- script.time_str,
- session->evlist->first_sample_time,
- session->evlist->last_sample_time);
-
- if (script.range_num < 0) {
- pr_err("Invalid time string\n");
- err = -EINVAL;
+ if (script.time_str) {
+ err = perf_time__parse_for_ranges(script.time_str, session,
+ &script.ptime_range,
+ &script.range_size,
+ &script.range_num);
+ if (err < 0)
goto out_delete;
- }
- } else {
- script.range_num = 1;
}
err = __cmd_script(&script);
@@ -3737,7 +3713,8 @@ int cmd_script(int argc, const char **argv)
flush_scripting();
out_delete:
- zfree(&script.ptime_range);
+ if (script.ptime_range)
+ zfree(&script.ptime_range);
perf_evlist__free_stats(session->evlist);
perf_session__delete(session);
diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 6193b46..0f53bae 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -11,6 +11,8 @@
#include "perf.h"
#include "debug.h"
#include "time-utils.h"
+#include "session.h"
+#include "evlist.h"
int parse_nsec_time(const char *str, u64 *ptime)
{
@@ -374,7 +376,7 @@ bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
struct perf_time_interval *ptime;
int i;
- if ((timestamp == 0) || (num == 0))
+ if ((!ptime_buf) || (timestamp == 0) || (num == 0))
return false;
if (num == 1)
@@ -396,6 +398,53 @@ bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
return (i == num) ? true : false;
}
+int perf_time__parse_for_ranges(const char *time_str,
+ struct perf_session *session,
+ struct perf_time_interval **ranges,
+ int *range_size, int *range_num)
+{
+ struct perf_time_interval *ptime_range;
+ int size, num, ret;
+
+ ptime_range = perf_time__range_alloc(time_str, &size);
+ if (!ptime_range)
+ return -ENOMEM;
+
+ if (perf_time__parse_str(ptime_range, time_str) != 0) {
+ if (session->evlist->first_sample_time == 0 &&
+ session->evlist->last_sample_time == 0) {
+ pr_err("HINT: no first/last sample time found in perf data.\n"
+ "Please use latest perf binary to execute 'perf record'\n"
+ "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
+ ret = -EINVAL;
+ goto error;
+ }
+
+ num = perf_time__percent_parse_str(
+ ptime_range, size,
+ time_str,
+ session->evlist->first_sample_time,
+ session->evlist->last_sample_time);
+
+ if (num < 0) {
+ pr_err("Invalid time string\n");
+ ret = -EINVAL;
+ goto error;
+ }
+ } else {
+ num = 1;
+ }
+
+ *range_size = size;
+ *range_num = num;
+ *ranges = ptime_range;
+ return 0;
+
+error:
+ free(ptime_range);
+ return ret;
+}
+
int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
{
u64 sec = timestamp / NSEC_PER_SEC;
diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h
index 70b177d..b923de4 100644
--- a/tools/perf/util/time-utils.h
+++ b/tools/perf/util/time-utils.h
@@ -23,6 +23,12 @@ bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp);
bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
int num, u64 timestamp);
+struct perf_session;
+
+int perf_time__parse_for_ranges(const char *str, struct perf_session *session,
+ struct perf_time_interval **ranges,
+ int *range_size, int *range_num);
+
int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz);
int fetch_current_timestamp(char *buf, size_t sz);
--
2.7.4
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