diff options
Diffstat (limited to 'tools/perf/tests')
| -rw-r--r-- | tools/perf/tests/sigtrap.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/tools/perf/tests/sigtrap.c b/tools/perf/tests/sigtrap.c index a1bc7c776254..e6fd934b027a 100644 --- a/tools/perf/tests/sigtrap.c +++ b/tools/perf/tests/sigtrap.c @@ -103,6 +103,34 @@ static bool attr_has_sigtrap(void) return __btf_type__find_member_by_name(id, "sigtrap") != NULL; } + +static bool kernel_with_sleepable_spinlocks(void) +{ + const struct btf_member *member; + const struct btf_type *type; + const char *type_name; + int id; + + if (!btf__available()) + return false; + + id = btf__find_by_name_kind(btf, "spinlock", BTF_KIND_STRUCT); + if (id < 0) + return false; + + // Only RT has a "lock" member for "struct spinlock" + member = __btf_type__find_member_by_name(id, "lock"); + if (member == NULL) + return false; + + // But check its type as well + type = btf__type_by_id(btf, member->type); + if (!type || !btf_is_struct(type)) + return false; + + type_name = btf__name_by_offset(btf, type->name_off); + return type_name && !strcmp(type_name, "rt_mutex_base"); +} #else /* !HAVE_BPF_SKEL */ static bool attr_has_sigtrap(void) { @@ -125,6 +153,11 @@ static bool attr_has_sigtrap(void) return ret; } +static bool kernel_with_sleepable_spinlocks(void) +{ + return false; +} + static void btf__exit(void) { } @@ -166,7 +199,7 @@ static int run_test_threads(pthread_t *threads, pthread_barrier_t *barrier) static int run_stress_test(int fd, pthread_t *threads, pthread_barrier_t *barrier) { - int ret; + int ret, expected_sigtraps; ctx.iterate_on = 3000; @@ -175,7 +208,16 @@ static int run_stress_test(int fd, pthread_t *threads, pthread_barrier_t *barrie ret = run_test_threads(threads, barrier); TEST_ASSERT_EQUAL("disable failed", ioctl(fd, PERF_EVENT_IOC_DISABLE, 0), 0); - TEST_ASSERT_EQUAL("unexpected sigtraps", ctx.signal_count, NUM_THREADS * ctx.iterate_on); + expected_sigtraps = NUM_THREADS * ctx.iterate_on; + + if (ctx.signal_count < expected_sigtraps && kernel_with_sleepable_spinlocks()) { + pr_debug("Expected %d sigtraps, got %d, running on a kernel with sleepable spinlocks.\n", + expected_sigtraps, ctx.signal_count); + pr_debug("See https://lore.kernel.org/all/e368f2c848d77fbc8d259f44e2055fe469c219cf.camel@gmx.de/\n"); + return TEST_SKIP; + } else + TEST_ASSERT_EQUAL("unexpected sigtraps", ctx.signal_count, expected_sigtraps); + TEST_ASSERT_EQUAL("missing signals or incorrectly delivered", ctx.tids_want_signal, 0); TEST_ASSERT_VAL("unexpected si_addr", ctx.first_siginfo.si_addr == &ctx.iterate_on); #if 0 /* FIXME: enable when libc's signal.h has si_perf_{type,data} */ |