Messages in this thread Patch in this message | | | Subject | [PATCH v1 7/8] perf record: implement resume and pause control commands handling | From | Alexey Budankov <> | Date | Fri, 27 Mar 2020 11:50:27 +0300 |
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Implement handling of events coming from control file descriptor.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> --- tools/perf/builtin-record.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index f99751943b40..ae6f7d08e472 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1418,6 +1418,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) struct evlist *sb_evlist = NULL; int fd; float ratio = 0; + enum evlist_ctl_cmd cmd = CTL_CMD_UNSUPPORTED; atexit(record__sig_exit); signal(SIGCHLD, sig_handler); @@ -1620,6 +1621,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) perf_evlist__start_workload(rec->evlist); } + perf_evlist__initialize_ctlfd(rec->evlist, opts->ctl_fd, opts->ctl_fd_ack); + if (opts->initial_delay) { pr_info(PERF_EVLIST__PAUSED_MSG); if (opts->initial_delay > 0) { @@ -1710,8 +1713,23 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) * Propagate error, only if there's any. Ignore positive * number of returned events and interrupt error. */ - if (err > 0 || (err < 0 && errno == EINTR)) + if (err > 0 || (err < 0 && errno == EINTR)) { err = 0; + if (perf_evlist__ctlfd_process(rec->evlist, &cmd) > 0) { + switch (cmd) { + case CTL_CMD_RESUME: + pr_info(PERF_EVLIST__RESUMED_MSG); + break; + case CTL_CMD_PAUSE: + pr_info(PERF_EVLIST__PAUSED_MSG); + break; + case CTL_CMD_ACK: + case CTL_CMD_UNSUPPORTED: + default: + break; + } + } + } waking++; if (evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) @@ -1751,6 +1769,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) record__synthesize_workload(rec, true); out_child: + perf_evlist__finalize_ctlfd(rec->evlist); record__mmap_read_all(rec, true); record__aio_mmap_read_sync(rec); -- 2.24.1
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