Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757937Ab3CULl0 (ORCPT ); Thu, 21 Mar 2013 07:41:26 -0400 Received: from terminus.zytor.com ([198.137.202.10]:56823 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755705Ab3CULlX (ORCPT ); Thu, 21 Mar 2013 07:41:23 -0400 Date: Thu, 21 Mar 2013 04:39:30 -0700 From: tip-bot for Jiri Olsa Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, eranian@google.com, paulus@samba.org, hpa@zytor.com, mingo@kernel.org, andi@firstfloor.org, a.p.zijlstra@chello.nl, jolsa@redhat.com, vincent.weaver@maine.edu, fweisbec@gmail.com, oleg@redhat.com, tglx@linutronix.de, cjashfor@linux.vnet.ibm.com, mingo@elte.hu Reply-To: mingo@kernel.org, hpa@zytor.com, paulus@samba.org, eranian@google.com, linux-kernel@vger.kernel.org, acme@redhat.com, andi@firstfloor.org, a.p.zijlstra@chello.nl, jolsa@redhat.com, fweisbec@gmail.com, vincent.weaver@maine.edu, tglx@linutronix.de, oleg@redhat.com, cjashfor@linux.vnet.ibm.com, mingo@elte.hu In-Reply-To: <1362940871-24486-7-git-send-email-jolsa@redhat.com> References: <1362940871-24486-7-git-send-email-jolsa@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf tests: Test breakpoint overflow signal handler counts Git-Commit-ID: 06933e3a732bb305b0721f1051a45264588e0519 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (terminus.zytor.com [127.0.0.1]); Thu, 21 Mar 2013 04:39:40 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5881 Lines: 212 Commit-ID: 06933e3a732bb305b0721f1051a45264588e0519 Gitweb: http://git.kernel.org/tip/06933e3a732bb305b0721f1051a45264588e0519 Author: Jiri Olsa AuthorDate: Sun, 10 Mar 2013 19:41:11 +0100 Committer: Arnaldo Carvalho de Melo CommitDate: Fri, 15 Mar 2013 13:06:10 -0300 perf tests: Test breakpoint overflow signal handler counts Adding automated test to check the exact number of breakpoint event overflows and counts. This test was originally done by Vince Weaver for perf_event_tests. Signed-off-by: Jiri Olsa Cc: "H. Peter Anvin" Cc: Andi Kleen Cc: Corey Ashford Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Ingo Molnar Cc: Oleg Nesterov Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Vince Weaver Link: http://lkml.kernel.org/r/1362940871-24486-7-git-send-email-jolsa@redhat.com [ committer note: s/pr_err/pr_debug/g i.e. print just OK or FAILED in non verbose mode ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile | 1 + tools/perf/tests/bp_signal_overflow.c | 126 ++++++++++++++++++++++++++++++++++ tools/perf/tests/builtin-test.c | 4 ++ tools/perf/tests/tests.h | 1 + 4 files changed, 132 insertions(+) diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 21e0b4b..990e9a1 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -512,6 +512,7 @@ LIB_OBJS += $(OUTPUT)tests/pmu.o LIB_OBJS += $(OUTPUT)tests/hists_link.o LIB_OBJS += $(OUTPUT)tests/python-use.o LIB_OBJS += $(OUTPUT)tests/bp_signal.o +LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o BUILTIN_OBJS += $(OUTPUT)builtin-bench.o diff --git a/tools/perf/tests/bp_signal_overflow.c b/tools/perf/tests/bp_signal_overflow.c new file mode 100644 index 0000000..fe7ed28 --- /dev/null +++ b/tools/perf/tests/bp_signal_overflow.c @@ -0,0 +1,126 @@ +/* + * Originally done by Vince Weaver for + * perf_event_tests (git://github.com/deater/perf_event_tests) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "tests.h" +#include "debug.h" +#include "perf.h" + +static int overflows; + +__attribute__ ((noinline)) +static int test_function(void) +{ + return time(NULL); +} + +static void sig_handler(int signum __maybe_unused, + siginfo_t *oh __maybe_unused, + void *uc __maybe_unused) +{ + overflows++; +} + +static long long bp_count(int fd) +{ + long long count; + int ret; + + ret = read(fd, &count, sizeof(long long)); + if (ret != sizeof(long long)) { + pr_debug("failed to read: %d\n", ret); + return TEST_FAIL; + } + + return count; +} + +#define EXECUTIONS 10000 +#define THRESHOLD 100 + +int test__bp_signal_overflow(void) +{ + struct perf_event_attr pe; + struct sigaction sa; + long long count; + int fd, i, fails = 0; + + /* setup SIGIO signal handler */ + memset(&sa, 0, sizeof(struct sigaction)); + sa.sa_sigaction = (void *) sig_handler; + sa.sa_flags = SA_SIGINFO; + + if (sigaction(SIGIO, &sa, NULL) < 0) { + pr_debug("failed setting up signal handler\n"); + return TEST_FAIL; + } + + memset(&pe, 0, sizeof(struct perf_event_attr)); + pe.type = PERF_TYPE_BREAKPOINT; + pe.size = sizeof(struct perf_event_attr); + + pe.config = 0; + pe.bp_type = HW_BREAKPOINT_X; + pe.bp_addr = (unsigned long) test_function; + pe.bp_len = sizeof(long); + + pe.sample_period = THRESHOLD; + pe.sample_type = PERF_SAMPLE_IP; + pe.wakeup_events = 1; + + pe.disabled = 1; + pe.exclude_kernel = 1; + pe.exclude_hv = 1; + + fd = sys_perf_event_open(&pe, 0, -1, -1, 0); + if (fd < 0) { + pr_debug("failed opening event %llx\n", pe.config); + return TEST_FAIL; + } + + fcntl(fd, F_SETFL, O_RDWR|O_NONBLOCK|O_ASYNC); + fcntl(fd, F_SETSIG, SIGIO); + fcntl(fd, F_SETOWN, getpid()); + + ioctl(fd, PERF_EVENT_IOC_RESET, 0); + ioctl(fd, PERF_EVENT_IOC_ENABLE, 0); + + for (i = 0; i < EXECUTIONS; i++) + test_function(); + + ioctl(fd, PERF_EVENT_IOC_DISABLE, 0); + + count = bp_count(fd); + + close(fd); + + pr_debug("count %lld, overflow %d\n", + count, overflows); + + if (count != EXECUTIONS) { + pr_debug("\tWrong number of executions %lld != %d\n", + count, EXECUTIONS); + fails++; + } + + if (overflows != EXECUTIONS / THRESHOLD) { + pr_debug("\tWrong number of overflows %d != %d\n", + overflows, EXECUTIONS / THRESHOLD); + fails++; + } + + return fails ? TEST_FAIL : TEST_OK; +} diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 37b108b..45d9ad4 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -82,6 +82,10 @@ static struct test { .func = test__bp_signal, }, { + .desc = "Test breakpoint overflow sampling", + .func = test__bp_signal_overflow, + }, + { .func = NULL, }, }; diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index 05d0e58..6cf1ec4 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -24,5 +24,6 @@ int test__parse_events(void); int test__hists_link(void); int test__python_use(void); int test__bp_signal(void); +int test__bp_signal_overflow(void); #endif /* TESTS_H */ -- 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/