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perf inject: Work with files
Before this patch "perf inject" can only handle data from pipe. I want to use "perf inject" for reworking events. Look at my following patch. v2: add information about new options in tools/perf/Documentation/ Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1344344165-369636-2-git-send-email-avagin@openvz.org [ committer note: fixed it up to cope with5852a44
,5ded57a
,002439e
&f62d3f0
] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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commit
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2 changed files with 41 additions and 3 deletions
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@ -29,6 +29,12 @@ OPTIONS
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-v::
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--verbose::
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Be more verbose.
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-i::
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--input=::
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Input file name. (default: stdin)
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-o::
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--output=::
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Output file name. (default: stdout)
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SEE ALSO
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--------
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@ -17,24 +17,30 @@
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struct perf_inject {
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struct perf_tool tool;
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bool build_ids;
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const char *input_name;
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int pipe_output,
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output;
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u64 bytes_written;
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};
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static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
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static int perf_event__repipe_synth(struct perf_tool *tool,
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union perf_event *event,
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struct machine *machine __maybe_unused)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
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uint32_t size;
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void *buf = event;
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size = event->header.size;
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while (size) {
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int ret = write(STDOUT_FILENO, buf, size);
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int ret = write(inject->output, buf, size);
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if (ret < 0)
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return -errno;
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size -= ret;
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buf += ret;
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inject->bytes_written += ret;
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}
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return 0;
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@ -231,12 +237,20 @@ static int __cmd_inject(struct perf_inject *inject)
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inject->tool.tracing_data = perf_event__repipe_tracing_data;
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}
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session = perf_session__new("-", O_RDONLY, false, true, &inject->tool);
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session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
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if (session == NULL)
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return -ENOMEM;
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if (!inject->pipe_output)
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lseek(inject->output, session->header.data_offset, SEEK_SET);
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ret = perf_session__process_events(session, &inject->tool);
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if (!inject->pipe_output) {
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session->header.data_size = inject->bytes_written;
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perf_session__write_header(session, session->evlist, inject->output, true);
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}
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perf_session__delete(session);
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return ret;
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@ -260,10 +274,16 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
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.tracing_data = perf_event__repipe_tracing_data_synth,
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.build_id = perf_event__repipe_op2_synth,
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},
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.input_name = "-",
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};
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const char *output_name = "-";
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const struct option options[] = {
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OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
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"Inject build-ids into the output stream"),
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OPT_STRING('i', "input", &inject.input_name, "file",
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"input file name"),
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OPT_STRING('o', "output", &output_name, "file",
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"output file name"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show build ids, etc)"),
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OPT_END()
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@ -281,6 +301,18 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
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if (argc)
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usage_with_options(inject_usage, options);
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if (!strcmp(output_name, "-")) {
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inject.pipe_output = 1;
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inject.output = STDOUT_FILENO;
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} else {
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inject.output = open(output_name, O_CREAT | O_WRONLY | O_TRUNC,
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S_IRUSR | S_IWUSR);
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if (inject.output < 0) {
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perror("failed to create output file");
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return -1;
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}
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}
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if (symbol__init() < 0)
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return -1;
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