[PATCH v12 04/15] perf evlist: introduce control file descriptors

From: Alexey Budankov
Date: Fri Jul 17 2020 - 03:00:53 EST



Define and initialize control file descriptors.

Signed-off-by: Alexey Budankov <alexey.budankov@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/util/evlist.c | 3 +++
tools/perf/util/evlist.h | 5 +++++
2 files changed, 8 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index bcbe0cb8482e..36eb50aba1f5 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -63,6 +63,9 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
perf_evlist__set_maps(&evlist->core, cpus, threads);
evlist->workload.pid = -1;
evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
+ evlist->ctl_fd.fd = -1;
+ evlist->ctl_fd.ack = -1;
+ evlist->ctl_fd.pos = -1;
}

struct evlist *evlist__new(void)
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 38901c0d1599..fe1fe40e044b 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -74,6 +74,11 @@ struct evlist {
pthread_t th;
volatile int done;
} thread;
+ struct {
+ int fd; /* control file descriptor */
+ int ack; /* ack file descriptor for control commands */
+ int pos; /* index at evlist core object to check signals */
+ } ctl_fd;
};

struct evsel_str_handler {
--
2.24.1