Commit-ID: f6d313699a9612a30fabe05bf2c9302c1408b5cf Gitweb: http://git.kernel.org/tip/f6d313699a9612a30fabe05bf2c9302c1408b5cf Author: Adrian Hunter <adrian.hun...@intel.com> AuthorDate: Mon, 14 Jul 2014 13:02:53 +0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 16 Jul 2014 17:57:36 -0300
perf tools: Add feature test for __sync_val_compare_and_swap Add a feature test for __sync_val_compare_and_swap() and __sync_bool_compare_and_swap() Signed-off-by: Adrian Hunter <adrian.hun...@intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Namhyung Kim <namhy...@gmail.com> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/r/1405332185-4050-30-git-send-email-adrian.hun...@intel.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/config/Makefile | 6 ++++++ tools/perf/config/feature-checks/Makefile | 4 ++++ tools/perf/config/feature-checks/test-all.c | 5 +++++ .../config/feature-checks/test-sync-compare-and-swap.c | 14 ++++++++++++++ 4 files changed, 29 insertions(+) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index b7f42d5..1f67aa0 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -164,6 +164,7 @@ CORE_FEATURE_TESTS = \ backtrace \ dwarf \ fortify-source \ + sync-compare-and-swap \ glibc \ gtk2 \ gtk2-infobar \ @@ -199,6 +200,7 @@ LIB_FEATURE_TESTS = \ VF_FEATURE_TESTS = \ backtrace \ fortify-source \ + sync-compare-and-swap \ gtk2-infobar \ libelf-getphdrnum \ libelf-mmap \ @@ -272,6 +274,10 @@ CFLAGS += -I$(LIB_INCLUDE) CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE +ifeq ($(feature-sync-compare-and-swap), 1) + CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT +endif + ifndef NO_BIONIC $(call feature_check,bionic) ifeq ($(feature-bionic), 1) diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile index 64c84e5..6088f8d 100644 --- a/tools/perf/config/feature-checks/Makefile +++ b/tools/perf/config/feature-checks/Makefile @@ -5,6 +5,7 @@ FILES= \ test-bionic.bin \ test-dwarf.bin \ test-fortify-source.bin \ + test-sync-compare-and-swap.bin \ test-glibc.bin \ test-gtk2.bin \ test-gtk2-infobar.bin \ @@ -141,6 +142,9 @@ test-timerfd.bin: test-libdw-dwarf-unwind.bin: $(BUILD) +test-sync-compare-and-swap.bin: + $(BUILD) -Werror + -include *.d ############################### diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c index fe5c1e5..a7d022e 100644 --- a/tools/perf/config/feature-checks/test-all.c +++ b/tools/perf/config/feature-checks/test-all.c @@ -89,6 +89,10 @@ # include "test-libdw-dwarf-unwind.c" #undef main +#define main main_test_sync_compare_and_swap +# include "test-sync-compare-and-swap.c" +#undef main + int main(int argc, char *argv[]) { main_test_libpython(); @@ -111,6 +115,7 @@ int main(int argc, char *argv[]) main_test_timerfd(); main_test_stackprotector_all(); main_test_libdw_dwarf_unwind(); + main_test_sync_compare_and_swap(argc, argv); return 0; } diff --git a/tools/perf/config/feature-checks/test-sync-compare-and-swap.c b/tools/perf/config/feature-checks/test-sync-compare-and-swap.c new file mode 100644 index 0000000..c34d4ca --- /dev/null +++ b/tools/perf/config/feature-checks/test-sync-compare-and-swap.c @@ -0,0 +1,14 @@ +#include <stdint.h> + +volatile uint64_t x; + +int main(int argc, char *argv[]) +{ + uint64_t old, new = argc; + + argv = argv; + do { + old = __sync_val_compare_and_swap(&x, 0, 0); + } while (!__sync_bool_compare_and_swap(&x, old, new)); + return old == new; +} -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
