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Date: Tue, 15 Dec 2009 09:40:29 GMT
From: tip-bot for Tom Zanussi <tzanussi@...il.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
tzanussi@...il.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/urgent] perf trace/scripting: Add 'record' and 'report' options
Commit-ID: 3875294f5c0d7b9ef96ffc373d8a956ebd7c0c7f
Gitweb: http://git.kernel.org/tip/3875294f5c0d7b9ef96ffc373d8a956ebd7c0c7f
Author: Tom Zanussi <tzanussi@...il.com>
AuthorDate: Tue, 15 Dec 2009 02:53:39 -0600
Committer: Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 15 Dec 2009 10:31:33 +0100
perf trace/scripting: Add 'record' and 'report' options
Allow scripts to be recorded/executed by simply specifying the
script root name (the script name minus extension) along with
'record' or 'report' to 'perf trace'.
The script names shown by 'perf trace -l' can be directly used
to run the command-line contained within the corresponding
'-record' and '-report' versions of scripts in the scripts/*/bin
directories.
For example, to record the trace data needed to run the
wakeup-latency.pl script, the user can easily find the name of
the corresponding script from the script list and invoke it
using 'perf trace record', without having to remember the
details of how to do the same thing using the lower-level perf
trace command-line options:
root@...picana:~# perf trace -l
List of available trace scripts:
workqueue-stats workqueue stats (ins/exe/create/destroy)
wakeup-latency system-wide min/max/avg wakeup latency
rw-by-file <comm> r/w activity for a program, by file
check-perf-trace useless but exhaustive test script
rw-by-pid system-wide r/w activity
root@...picana:~# perf trace record wakeup-latency
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.296 MB perf.data (~12931
samples) ]
To run the wakeup-latency.pl script using the captured data,
change 'record' to 'report' in the command-line:
root@...picana:~# perf trace report wakeup-latency
wakeup_latency stats:
total_wakeups: 65
avg_wakeup_latency (ns): 22417
min_wakeup_latency (ns): 3470
max_wakeup_latency (ns): 223311
perf trace Perl script stopped
If the script takes options, thay can be simply added to the end
of the 'report' invocation:
root@...picana:~# perf trace record rw-by-file
^C[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.782 MB perf.data (~34171
samples) ]
root@...picana:~# perf trace report rw-by-file perf
file read counts for perf:
fd # reads bytes_requested
------ ---------- -----------
122 1934 1980416
120 1 32
file write counts for perf:
fd # writes bytes_written
------ ---------- -----------
3 4006 280568
perf trace Perl script stopped
Signed-off-by: Tom Zanussi <tzanussi@...il.com>
Cc: fweisbec@...il.com
Cc: rostedt@...dmis.org
LKML-Reference: <1260867220-15699-6-git-send-email-tzanussi@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
tools/perf/builtin-trace.c | 84 +++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 83 insertions(+), 1 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 7674153..7e744f7 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -469,6 +469,49 @@ static int list_available_scripts(const struct option *opt __used,
exit(0);
}
+static char *get_script_path(const char *script_root, const char *suffix)
+{
+ struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ char scripts_path[MAXPATHLEN];
+ char script_path[MAXPATHLEN];
+ DIR *scripts_dir, *lang_dir;
+ char lang_path[MAXPATHLEN];
+ char *str, *__script_root;
+ char *path = NULL;
+
+ snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+
+ scripts_dir = opendir(scripts_path);
+ if (!scripts_dir)
+ return NULL;
+
+ for_each_lang(scripts_dir, lang_dirent, lang_next) {
+ snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+ lang_dirent.d_name);
+ lang_dir = opendir(lang_path);
+ if (!lang_dir)
+ continue;
+
+ for_each_script(lang_dir, script_dirent, script_next) {
+ __script_root = strdup(script_dirent.d_name);
+ str = ends_with(__script_root, suffix);
+ if (str) {
+ *str = '\0';
+ if (strcmp(__script_root, script_root))
+ continue;
+ snprintf(script_path, MAXPATHLEN, "%s/%s",
+ lang_path, script_dirent.d_name);
+ path = strdup(script_path);
+ free(__script_root);
+ break;
+ }
+ free(__script_root);
+ }
+ }
+
+ return path;
+}
+
static const char * const annotate_usage[] = {
"perf trace [<options>] <command>",
NULL
@@ -494,8 +537,47 @@ static const struct option options[] = {
int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
- int err;
struct perf_session *session;
+ const char *suffix = NULL;
+ const char **__argv;
+ char *script_path;
+ int i, err;
+
+ if (argc >= 2 && strncmp(argv[1], "rec", strlen("rec")) == 0) {
+ if (argc < 3) {
+ fprintf(stderr,
+ "Please specify a record script\n");
+ return -1;
+ }
+ suffix = RECORD_SUFFIX;
+ }
+
+ if (argc >= 2 && strncmp(argv[1], "rep", strlen("rep")) == 0) {
+ if (argc < 3) {
+ fprintf(stderr,
+ "Please specify a report script\n");
+ return -1;
+ }
+ suffix = REPORT_SUFFIX;
+ }
+
+ if (suffix) {
+ script_path = get_script_path(argv[2], suffix);
+ if (!script_path) {
+ fprintf(stderr, "script not found\n");
+ return -1;
+ }
+
+ __argv = malloc((argc + 1) * sizeof(const char *));
+ __argv[0] = "/bin/sh";
+ __argv[1] = script_path;
+ for (i = 3; i < argc; i++)
+ __argv[i - 1] = argv[i];
+ __argv[argc - 1] = NULL;
+
+ execvp("/bin/sh", (char **)__argv);
+ exit(-1);
+ }
symbol__init(0);
--
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