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authorJin Yao <yao.jin@linux.intel.com>2018-01-10 23:00:29 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-01-17 10:23:35 -0300
commit3002812e602d3f991a5b8cdc0499e63e13ff65c4 (patch)
tree90bd5f6b463b14899331a53f4a927a4a4c998dd7 /tools/perf
parent6e761cbc9127fb8fc609aea2265ee8279b8d6c55 (diff)
perf util: Support no index time percent slice
Previously, the time percent slice needs an index to specify which one the user wants. It may be easier to use if the index can be omitted. So with this patch, for example, perf report --stdio --time 10%/1 should be equivalent to perf report --stdio --time 10% Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1515596433-24653-5-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/time-utils.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 88510ab6450e..5769f972c23e 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -261,6 +261,37 @@ static int percent_comma_split(struct perf_time_interval *ptime_buf, int num,
return i;
}
+static int one_percent_convert(struct perf_time_interval *ptime_buf,
+ const char *ostr, u64 start, u64 end, char *c)
+{
+ char *str;
+ int len = strlen(ostr), ret;
+
+ /*
+ * c points to '%'.
+ * '%' should be the last character
+ */
+ if (ostr + len - 1 != c)
+ return -1;
+
+ /*
+ * Construct a string like "xx%/1"
+ */
+ str = malloc(len + 3);
+ if (str == NULL)
+ return -ENOMEM;
+
+ memcpy(str, ostr, len);
+ strcpy(str + len, "/1");
+
+ ret = percent_slash_split(str, ptime_buf, start, end);
+ if (ret == 0)
+ ret = 1;
+
+ free(str);
+ return ret;
+}
+
int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
const char *ostr, u64 start, u64 end)
{
@@ -270,6 +301,7 @@ int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
* ostr example:
* 10%/2,10%/3: select the second 10% slice and the third 10% slice
* 0%-10%,30%-40%: multiple time range
+ * 50%: just one percent
*/
memset(ptime_buf, 0, sizeof(*ptime_buf) * num);
@@ -286,6 +318,10 @@ int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
end, percent_dash_split);
}
+ c = strchr(ostr, '%');
+ if (c)
+ return one_percent_convert(ptime_buf, ostr, start, end, c);
+
return -1;
}