Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753634Ab3EINcw (ORCPT ); Thu, 9 May 2013 09:32:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33555 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751933Ab3EINcv (ORCPT ); Thu, 9 May 2013 09:32:51 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Corey Ashford , Frederic Weisbecker , Ingo Molnar , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Arnaldo Carvalho de Melo , Andi Kleen , David Ahern , Stephane Eranian Subject: [PATCH 3/9] perf tests: Add precise event automated test Date: Thu, 9 May 2013 15:32:18 +0200 Message-Id: <1368106344-23383-4-git-send-email-jolsa@redhat.com> In-Reply-To: <1368106344-23383-1-git-send-email-jolsa@redhat.com> References: <1368106344-23383-1-git-send-email-jolsa@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3428 Lines: 123 The test detects the precise attribute availability and try to open perf event with each allowed precise attribute value. Signed-off-by: Jiri Olsa Cc: Corey Ashford Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: David Ahern Cc: Stephane Eranian --- tools/perf/Makefile | 1 + tools/perf/tests/builtin-test.c | 4 ++++ tools/perf/tests/precise.c | 49 +++++++++++++++++++++++++++++++++++++++++ tools/perf/tests/tests.h | 1 + 4 files changed, 55 insertions(+) create mode 100644 tools/perf/tests/precise.c diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 477e7bf..f96de83 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -391,6 +391,7 @@ LIB_OBJS += $(OUTPUT)tests/bp_signal.o LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o LIB_OBJS += $(OUTPUT)tests/task-exit.o LIB_OBJS += $(OUTPUT)tests/sw-clock.o +LIB_OBJS += $(OUTPUT)tests/precise.o BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o BUILTIN_OBJS += $(OUTPUT)builtin-bench.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 0918ada..eda716b 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -94,6 +94,10 @@ static struct test { .func = test__sw_clock_freq, }, { + .desc = "Test precise event attribute", + .func = test__precise, + }, + { .func = NULL, }, }; diff --git a/tools/perf/tests/precise.c b/tools/perf/tests/precise.c new file mode 100644 index 0000000..c548520 --- /dev/null +++ b/tools/perf/tests/precise.c @@ -0,0 +1,49 @@ +#include +#include +#include +#include +#include +#include "perf.h" +#include "tests.h" +#include "util.h" +#include "sysfs.h" + +static int event_open_precise(int precise) +{ + struct perf_event_attr attr = { + .type = PERF_TYPE_HARDWARE, + .config = PERF_COUNT_HW_CPU_CYCLES, + .precise_ip = precise, + }; + int fd; + + pr_debug("open cycles event with precise %d\n", precise); + + fd = sys_perf_event_open(&attr, 0, -1, -1, 0); + if (fd < 0) { + pr_debug("failed to open event, syscall returned " + "with %d (%s)\n", fd, strerror(errno)); + return -1; + } + + close(fd); + return 0; + +} + +int test__precise(void) +{ + int precise = perf_precise__get(); + int i; + + if (precise <= 0) { + pr_debug("no precise info or support\n"); + return TEST_SKIP; + } + + for (i = 1; i <= precise; i++) + if (event_open_precise(i)) + return TEST_FAIL; + + return TEST_OK; +} diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index dd7feae..ff37f54 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -27,5 +27,6 @@ int test__bp_signal(void); int test__bp_signal_overflow(void); int test__task_exit(void); int test__sw_clock_freq(void); +int test__precise(void); #endif /* TESTS_H */ -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/