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Subject[PATCH v5 1/2] Add new elements for per-event-dump option
Date
This patch will add two elements for perf_tool struct: per_event_dump
is used to mark the per-event-dump option, last_evsel_name is used
to save last evsel's name. Add a new struct perf_script_evsel to
save evsel's specific data. There are three elements in this new struct:
dump_evsel_fp is used to save the file pointer of the dump_event file,
filename is used to save the file name of the dump_event file, samples
is used to save the number of samples for each evsel. The perf_script_evsel
struct will be saved in the evsel->priv. Add the OPT_BOOLEAN for per-event-dump
in the perf_data_file struct.

Changes since v4:
- none.

Changes since v3:
- remove three elements for perf_evsel struct and create a new struct:
perf_script_evsel to save them.

Changes since v2:
- add the last_evsel_name for per_tool struct to save last evsel's name.
- add three elements for perf_evsel struct:dump_event_fp is used to save
the file pointer of the dump_event file, filename is used to save the file
name of the dump_event file, samples is used to save the number of samples
for each evsel.

Changes since v1:
- remove the set for script.tool.per_event_dump variable,since the OPT_BOOLEAN
will do the same thing.

Signed-off-by: yuzhoujian <yuzhoujian@didichuxing.com>
---
tools/perf/builtin-script.c | 3 +++
tools/perf/util/evsel.h | 11 +++++++++++
tools/perf/util/tool.h | 2 ++
3 files changed, 16 insertions(+)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index a3add2c..81f141f 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2758,6 +2758,7 @@ int cmd_script(int argc, const char **argv)
.cpu_map = process_cpu_map_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
+ .per_event_dump = false,
},
};
struct perf_data_file file = {
@@ -2828,6 +2829,8 @@ int cmd_script(int argc, const char **argv)
"Show context switch events (if recorded)"),
OPT_BOOLEAN('\0', "show-namespace-events", &script.show_namespace_events,
"Show namespace events (if recorded)"),
+ OPT_BOOLEAN('\0', "per-event-dump", &script.tool.per_event_dump,
+ "Dump trace output to files named by the monitored events"),
OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
OPT_INTEGER(0, "max-blocks", &max_blocks,
"Maximum number of code blocks to dump with brstackinsn"),
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index db65878..abe728d 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -5,6 +5,7 @@
#include <stdbool.h>
#include <stddef.h>
#include <linux/perf_event.h>
+#include <stdio.h>
#include <linux/types.h>
#include "xyarray.h"
#include "symbol.h"
@@ -51,6 +52,16 @@ enum {
PERF_EVSEL__CONFIG_TERM_MAX,
};

+/*
+ * The struct perf_script_evsel is used to save the dump file's name,
+ * dump file's fp and the total number of samples for each evsel.
+ */
+struct perf_script_evsel {
+ char *filename;
+ FILE *dump_evsel_fp;
+ unsigned long samples;
+};
+
struct perf_evsel_config_term {
struct list_head list;
int type;
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index d549e50..2cbcee4 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -75,6 +75,8 @@ struct perf_tool {
bool ordered_events;
bool ordering_requires_timestamps;
bool namespace_events;
+ bool per_event_dump;
+ const char *last_evsel_name;
enum show_feature_header show_feat_hdr;
};

--
1.8.3.1
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