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| author |   Wang Nan <wangnan0@huawei.com> | 2016-06-16 08:02:41 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-21 13:18:35 -0300 |
| commit | 0aab21363ffa66d6e7340bc50cc5bfae865fd1a6 (patch) | |
| tree | 5e716031fc08a0d62d7213c63d149e6140069555 /tools/perf/builtin-record.c | |
| parent | perf llvm: Allow dump llvm output object file using llvm.dump-obj (diff) | |
| download | wireguard-linux-0aab21363ffa66d6e7340bc50cc5bfae865fd1a6.tar.xz wireguard-linux-0aab21363ffa66d6e7340bc50cc5bfae865fd1a6.zip | |
perf record: Add --dry-run option to check cmdline options
With '--dry-run', 'perf record' doesn't do reall recording. Combine with
llvm.dump-obj option, --dry-run can be used to help compile BPF objects
for embedded platform.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1466064161-48553-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index d4cf1b0c88f9..b1304ebc8779 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1274,6 +1274,8 @@ static struct record record = { const char record_callchain_help[] = CALLCHAIN_RECORD_HELP "\n\t\t\t\tDefault: fp"; +static bool dry_run; + /* * XXX Will stay a global variable till we fix builtin-script.c to stop messing * with it and switch to use the library functions in perf_evlist that came @@ -1393,6 +1395,8 @@ struct option __record_options[] = { "append timestamp to output filename"), OPT_BOOLEAN(0, "switch-output", &record.switch_output, "Switch output when receive SIGUSR2"), + OPT_BOOLEAN(0, "dry-run", &dry_run, + "Parse options then exit"), OPT_END() }; @@ -1462,6 +1466,9 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) if (err) return err; + if (dry_run) + return 0; + err = bpf__setup_stdout(rec->evlist); if (err) { bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); |