linux-kernel - [PATCH v1 1/8] perf evlist: introduce control file descriptors

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Message-ID: <61540ab8-bb20-911b-6a2e-8d7b83829d9b@linux.intel.com>
Date:   Fri, 27 Mar 2020 11:45:37 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 1/8] perf evlist: introduce control file descriptors


Define and initialize control file descriptors.

Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
---
 tools/perf/util/evlist.c | 3 +++
 tools/perf/util/evlist.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1548237b6558..1afd87cfa027 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -62,6 +62,9 @@ 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 = -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 f5bd5c386df1..ac3dd895ef8f 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -74,6 +74,9 @@ struct evlist {
 		pthread_t		th;
 		volatile int		done;
 	} thread;
+	int		ctl_fd;
+	int		ctl_fd_ack;
+	int		ctl_fd_pos;
 };
 
 struct evsel_str_handler {
-- 
2.24.1