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Date: Sun, 24 Feb 2019 07:37:15 -0800
From: Andi Kleen <andi@...stfloor.org>
To: acme@...nel.org, linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, jolsa@...nel.org,
namhyung@...nel.org, eranian@...gle.com,
Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 04/11] perf tools report: Parse time quantum
From: Andi Kleen <ak@...ux.intel.com>
Many workloads change over time. perf report currently aggregates
the whole time range reported in perf.data.
This patch adds an option for a time quantum to quantisize the
perf.data over time.
This just adds the option, will be used in follow on patches
for a time sort key.
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
tools/perf/Documentation/perf-report.txt | 4 +++
tools/perf/builtin-report.c | 37 ++++++++++++++++++++++++
tools/perf/util/hist.c | 2 ++
tools/perf/util/hist.h | 2 ++
4 files changed, 45 insertions(+)
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 51dbc519dbce..9ec1702bccdd 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -497,6 +497,10 @@ include::itrace.txt[]
The period/hits keywords set the base the percentage is computed
on - the samples period or the number of samples (hits).
+--time-quantum::
+ Configure time quantum for time sort key. Default 100ms.
+ Accepts s, us, ms, ns units.
+
include::callchain-overhead-calculation.txt[]
SEE ALSO
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index bb8918a747ba..600e168f3b99 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -47,6 +47,7 @@
#include <errno.h>
#include <inttypes.h>
#include <regex.h>
+#include "sane_ctype.h"
#include <signal.h>
#include <linux/bitmap.h>
#include <linux/stringify.h>
@@ -926,6 +927,39 @@ report_parse_callchain_opt(const struct option *opt, const char *arg, int unset)
return parse_callchain_report_opt(arg);
}
+static int
+parse_time_quantum(const struct option *opt, const char *arg,
+ int unset __maybe_unused)
+{
+ unsigned long *time_q = opt->value;
+ char *end;
+
+ *time_q = strtoul(arg, &end, 0);
+ if (end == arg)
+ goto parse_err;
+ while (isspace(*end))
+ end++;
+ if (*end == 0)
+ return 0;
+ if (!strcmp(end, "s")) {
+ *time_q *= 1000000000;
+ return 0;
+ }
+ if (!strcmp(end, "ms")) {
+ *time_q *= 1000000;
+ return 0;
+ }
+ if (!strcmp(end, "us")) {
+ *time_q *= 1000;
+ return 0;
+ }
+ if (!strcmp(end, "ns"))
+ return 0;
+parse_err:
+ pr_err("Cannot parse time quantum `%s'\n", arg);
+ return -1;
+}
+
int
report_parse_ignore_callees_opt(const struct option *opt __maybe_unused,
const char *arg, int unset __maybe_unused)
@@ -1148,6 +1182,9 @@ int cmd_report(int argc, const char **argv)
"Set percent type local/global-period/hits",
annotate_parse_percent_type),
OPT_BOOLEAN(0, "ns", &nanosecs, "Show times in nanosecs"),
+ OPT_CALLBACK(0, "time-quantum", &time_quantum, "time (ms|us|ns)",
+ "Set time quantum for time sort key (default 100ms)",
+ parse_time_quantum),
OPT_END()
};
struct perf_data data = {
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 669f961316f0..d25ca5bb91e6 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -20,6 +20,8 @@
#include <inttypes.h>
#include <sys/param.h>
+unsigned long time_quantum = 100000000;
+
static bool hists__filter_entry_by_dso(struct hists *hists,
struct hist_entry *he);
static bool hists__filter_entry_by_thread(struct hists *hists,
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 4af27fbab24f..8e602b486c5c 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -531,4 +531,6 @@ static inline int hists__scnprintf_title(struct hists *hists, char *bf, size_t s
return __hists__scnprintf_title(hists, bf, size, true);
}
+extern unsigned long time_quantum;
+
#endif /* __PERF_HIST_H */
--
2.17.2
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