summaryrefslogtreecommitdiff
path: root/tools/perf/bench
diff options
context:
space:
mode:
authorYann Droneaud <ydroneaud@opteya.com>2014-07-01 00:28:47 +0400
committerJiri Olsa <jolsa@kernel.org>2014-07-18 11:09:34 +0400
commit57480d2cd93579d665e57e144e1e63f7f02ef058 (patch)
treea1c628c2bd65a943461479ad52cd4bec179e51d7 /tools/perf/bench
parentec6dbcb7ade2a616675cbe3185cf299ee1615c9f (diff)
downloadlinux-57480d2cd93579d665e57e144e1e63f7f02ef058.tar.xz
perf tools: Enable close-on-exec flag on perf file descriptor
In commit a21b0b354d4a ('perf: Introduce a flag to enable close-on-exec in perf_event_open()'), flag PERF_FLAG_FD_CLOEXEC was added to perf_event_open(2) syscall to allows userspace to atomically enable close-on-exec behavor when creating the file descriptor. This patch makes perf tools use the new flag if supported by the kernel, so that the event file descriptors got automatically closed if perf tool exec a sub-command. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/1404160127-7475-1-git-send-email-ydroneaud@opteya.com Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Diffstat (limited to 'tools/perf/bench')
-rw-r--r--tools/perf/bench/mem-memcpy.c4
-rw-r--r--tools/perf/bench/mem-memset.c4
2 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index e622c3e96efc..2465141b554b 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -10,6 +10,7 @@
#include "../util/util.h"
#include "../util/parse-options.h"
#include "../util/header.h"
+#include "../util/cloexec.h"
#include "bench.h"
#include "mem-memcpy-arch.h"
@@ -83,7 +84,8 @@ static struct perf_event_attr cycle_attr = {
static void init_cycle(void)
{
- cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, 0);
+ cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1,
+ perf_event_open_cloexec_flag());
if (cycle_fd < 0 && errno == ENOSYS)
die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
index 2a65468619f0..75fc3e65fb2a 100644
--- a/tools/perf/bench/mem-memset.c
+++ b/tools/perf/bench/mem-memset.c
@@ -10,6 +10,7 @@
#include "../util/util.h"
#include "../util/parse-options.h"
#include "../util/header.h"
+#include "../util/cloexec.h"
#include "bench.h"
#include "mem-memset-arch.h"
@@ -83,7 +84,8 @@ static struct perf_event_attr cycle_attr = {
static void init_cycle(void)
{
- cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, 0);
+ cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1,
+ perf_event_open_cloexec_flag());
if (cycle_fd < 0 && errno == ENOSYS)
die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");