diff options
| author | David Ahern <dsahern@gmail.com> | 2013-10-29 20:43:16 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-05 17:03:22 +0400 |
| commit | 87419c9afff1431d4b62b388baf6bfa07e0b14ff (patch) | |
| tree | 67790f43f93fb6fde554ef37357e9bee7b124a89 /tools/perf/config | |
| parent | 41a4e6e2a0237e8ac895f43158ef7c91ab7af157 (diff) | |
| download | linux-87419c9afff1431d4b62b388baf6bfa07e0b14ff.tar.xz | |
perf kvm: Disable live command if timerfd is not supported
If the OS does not have timerfd support (e.g., older OS'es like RHEL5)
disable perf kvm stat live.
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1383064996-20933-2-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/config')
| -rw-r--r-- | tools/perf/config/Makefile | 7 | ||||
| -rw-r--r-- | tools/perf/config/feature-checks/Makefile | 6 | ||||
| -rw-r--r-- | tools/perf/config/feature-checks/test-all.c | 5 | ||||
| -rw-r--r-- | tools/perf/config/feature-checks/test-timerfd.c | 18 |
4 files changed, 35 insertions, 1 deletions
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index ffb5f55c8fba..be8bb9a77287 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -397,6 +397,13 @@ else endif endif +$(call feature_check,timerfd) +ifeq ($(feature-timerfd), 1) + CFLAGS += -DHAVE_TIMERFD_SUPPORT +else + msg := $(warning No timerfd support. Disables 'perf kvm stat live'); +endif + disable-python = $(eval $(disable-python_code)) define disable-python_code CFLAGS += -DNO_LIBPYTHON diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index d37d58d273fe..c803f17fb986 100644 --- a/tools/perf/config/feature-checks/Makefile +++ b/tools/perf/config/feature-checks/Makefile @@ -25,7 +25,8 @@ FILES= \ test-libunwind \ test-on-exit \ test-stackprotector-all \ - test-stackprotector + test-stackprotector \ + test-timerfd CC := $(CC) -MD @@ -136,6 +137,9 @@ test-on-exit: test-backtrace: $(BUILD) +test-timerfd: + $(BUILD) + -include *.d ############################### diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c index 50d431892a0c..59e7a705e146 100644 --- a/tools/perf/config/feature-checks/test-all.c +++ b/tools/perf/config/feature-checks/test-all.c @@ -81,6 +81,10 @@ # include "test-libnuma.c" #undef main +#define main main_test_timerfd +# include "test-timerfd.c" +#undef main + int main(int argc, char *argv[]) { main_test_libpython(); @@ -101,6 +105,7 @@ int main(int argc, char *argv[]) main_test_on_exit(); main_test_backtrace(); main_test_libnuma(); + main_test_timerfd(); return 0; } diff --git a/tools/perf/config/feature-checks/test-timerfd.c b/tools/perf/config/feature-checks/test-timerfd.c new file mode 100644 index 000000000000..8c5c083b4d3c --- /dev/null +++ b/tools/perf/config/feature-checks/test-timerfd.c @@ -0,0 +1,18 @@ +/* + * test for timerfd functions used by perf-kvm-stat-live + */ +#include <sys/timerfd.h> + +int main(void) +{ + struct itimerspec new_value; + + int fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); + if (fd < 0) + return 1; + + if (timerfd_settime(fd, 0, &new_value, NULL) != 0) + return 1; + + return 0; +} |