From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/tools/perf/tests/openat-syscall.c | 60 ++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 kernel/tools/perf/tests/openat-syscall.c (limited to 'kernel/tools/perf/tests/openat-syscall.c') diff --git a/kernel/tools/perf/tests/openat-syscall.c b/kernel/tools/perf/tests/openat-syscall.c new file mode 100644 index 000000000..033b54797 --- /dev/null +++ b/kernel/tools/perf/tests/openat-syscall.c @@ -0,0 +1,60 @@ +#include +#include +#include "thread_map.h" +#include "evsel.h" +#include "debug.h" +#include "tests.h" + +int test__openat_syscall_event(void) +{ + int err = -1, fd; + struct perf_evsel *evsel; + unsigned int nr_openat_calls = 111, i; + struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX); + char sbuf[STRERR_BUFSIZE]; + char errbuf[BUFSIZ]; + + if (threads == NULL) { + pr_debug("thread_map__new\n"); + return -1; + } + + evsel = perf_evsel__newtp("syscalls", "sys_enter_openat"); + if (IS_ERR(evsel)) { + tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat"); + pr_debug("%s\n", errbuf); + goto out_thread_map_delete; + } + + if (perf_evsel__open_per_thread(evsel, threads) < 0) { + pr_debug("failed to open counter: %s, " + "tweak /proc/sys/kernel/perf_event_paranoid?\n", + strerror_r(errno, sbuf, sizeof(sbuf))); + goto out_evsel_delete; + } + + for (i = 0; i < nr_openat_calls; ++i) { + fd = openat(0, "/etc/passwd", O_RDONLY); + close(fd); + } + + if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) { + pr_debug("perf_evsel__read_on_cpu\n"); + goto out_close_fd; + } + + if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) { + pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n", + nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val); + goto out_close_fd; + } + + err = 0; +out_close_fd: + perf_evsel__close_fd(evsel, 1, threads->nr); +out_evsel_delete: + perf_evsel__delete(evsel); +out_thread_map_delete: + thread_map__put(threads); + return err; +} -- cgit 1.2.3-korg