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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 with 5852a44, 5ded57a, 002439e & f62d3f0 ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andrew Vagin 2012-08-07 16:56:02 +04:00 committed by Arnaldo Carvalho de Melo
parent fcc328032e
commit e558a5bd8b
2 changed files with 41 additions and 3 deletions
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6
tools/perf/Documentation/perf-inject.txt
View File

@ -29,6 +29,12 @@ OPTIONS
-v::
--verbose::
Be more verbose.
-i::
--input=::
Input file name. (default: stdin)
-o::
--output=::
Output file name. (default: stdout)
SEE ALSO
--------

38
tools/perf/builtin-inject.c
View File

@ -17,24 +17,30 @@
struct perf_inject {
struct perf_tool tool;
bool build_ids;
const char *input_name;
int pipe_output,
output;
u64 bytes_written;
};
static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
static int perf_event__repipe_synth(struct perf_tool *tool,
union perf_event *event,
struct machine *machine __maybe_unused)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
uint32_t size;
void *buf = event;
size = event->header.size;
while (size) {
int ret = write(STDOUT_FILENO, buf, size);
int ret = write(inject->output, buf, size);
if (ret < 0)
return -errno;
size -= ret;
buf += ret;
inject->bytes_written += ret;
}
return 0;
@ -231,12 +237,20 @@ static int __cmd_inject(struct perf_inject *inject)
inject->tool.tracing_data = perf_event__repipe_tracing_data;
}
session = perf_session__new("-", O_RDONLY, false, true, &inject->tool);
session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
if (session == NULL)
return -ENOMEM;
if (!inject->pipe_output)
lseek(inject->output, session->header.data_offset, SEEK_SET);
ret = perf_session__process_events(session, &inject->tool);
if (!inject->pipe_output) {
session->header.data_size = inject->bytes_written;
perf_session__write_header(session, session->evlist, inject->output, true);
}
perf_session__delete(session);
return ret;
@ -260,10 +274,16 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
.tracing_data = perf_event__repipe_tracing_data_synth,
.build_id = perf_event__repipe_op2_synth,
},
.input_name = "-",
};
const char *output_name = "-";
const struct option options[] = {
OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
"Inject build-ids into the output stream"),
OPT_STRING('i', "input", &inject.input_name, "file",
"input file name"),
OPT_STRING('o', "output", &output_name, "file",
"output file name"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show build ids, etc)"),
OPT_END()
@ -281,6 +301,18 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
if (argc)
usage_with_options(inject_usage, options);
if (!strcmp(output_name, "-")) {
inject.pipe_output = 1;
inject.output = STDOUT_FILENO;
} else {
inject.output = open(output_name, O_CREAT | O_WRONLY | O_TRUNC,
S_IRUSR | S_IWUSR);
if (inject.output < 0) {
perror("failed to create output file");
return -1;
}
}
if (symbol__init() < 0)
return -1;