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155 lines
3.6 KiB
155 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include "debug.h" |
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#include "evlist.h" |
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#include "evsel.h" |
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#include "target.h" |
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#include "thread_map.h" |
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#include "tests.h" |
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#include "util/mmap.h" |
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#include <errno.h> |
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#include <signal.h> |
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#include <linux/string.h> |
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#include <perf/cpumap.h> |
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#include <perf/evlist.h> |
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#include <perf/mmap.h> |
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static int exited; |
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static int nr_exit; |
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static void sig_handler(int sig __maybe_unused) |
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{ |
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exited = 1; |
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} |
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/* |
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* evlist__prepare_workload will send a SIGUSR1 if the fork fails, since |
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* we asked by setting its exec_error to this handler. |
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*/ |
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static void workload_exec_failed_signal(int signo __maybe_unused, |
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siginfo_t *info __maybe_unused, |
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void *ucontext __maybe_unused) |
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{ |
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exited = 1; |
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nr_exit = -1; |
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} |
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/* |
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* This test will start a workload that does nothing then it checks |
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* if the number of exit event reported by the kernel is 1 or not |
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* in order to check the kernel returns correct number of event. |
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*/ |
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static int test__task_exit(struct test_suite *test __maybe_unused, int subtest __maybe_unused) |
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{ |
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int err = -1; |
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union perf_event *event; |
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struct evsel *evsel; |
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struct evlist *evlist; |
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struct target target = { |
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.uid = UINT_MAX, |
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.uses_mmap = true, |
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}; |
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const char *argv[] = { "true", NULL }; |
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char sbuf[STRERR_BUFSIZE]; |
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struct perf_cpu_map *cpus; |
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struct perf_thread_map *threads; |
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struct mmap *md; |
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int retry_count = 0; |
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signal(SIGCHLD, sig_handler); |
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evlist = evlist__new_default(); |
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if (evlist == NULL) { |
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pr_debug("evlist__new_default\n"); |
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return -1; |
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} |
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/* |
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* Create maps of threads and cpus to monitor. In this case |
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* we start with all threads and cpus (-1, -1) but then in |
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* evlist__prepare_workload we'll fill in the only thread |
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* we're monitoring, the one forked there. |
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*/ |
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cpus = perf_cpu_map__dummy_new(); |
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threads = thread_map__new_by_tid(-1); |
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if (!cpus || !threads) { |
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err = -ENOMEM; |
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pr_debug("Not enough memory to create thread/cpu maps\n"); |
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goto out_delete_evlist; |
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} |
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perf_evlist__set_maps(&evlist->core, cpus, threads); |
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err = evlist__prepare_workload(evlist, &target, argv, false, workload_exec_failed_signal); |
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if (err < 0) { |
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pr_debug("Couldn't run the workload!\n"); |
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goto out_delete_evlist; |
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} |
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evsel = evlist__first(evlist); |
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evsel->core.attr.task = 1; |
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#ifdef __s390x__ |
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evsel->core.attr.sample_freq = 1000000; |
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#else |
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evsel->core.attr.sample_freq = 1; |
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#endif |
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evsel->core.attr.inherit = 0; |
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evsel->core.attr.watermark = 0; |
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evsel->core.attr.wakeup_events = 1; |
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evsel->core.attr.exclude_kernel = 1; |
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err = evlist__open(evlist); |
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if (err < 0) { |
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pr_debug("Couldn't open the evlist: %s\n", |
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str_error_r(-err, sbuf, sizeof(sbuf))); |
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goto out_delete_evlist; |
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} |
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if (evlist__mmap(evlist, 128) < 0) { |
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pr_debug("failed to mmap events: %d (%s)\n", errno, |
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str_error_r(errno, sbuf, sizeof(sbuf))); |
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err = -1; |
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goto out_delete_evlist; |
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} |
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evlist__start_workload(evlist); |
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retry: |
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md = &evlist->mmap[0]; |
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if (perf_mmap__read_init(&md->core) < 0) |
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goto out_init; |
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while ((event = perf_mmap__read_event(&md->core)) != NULL) { |
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if (event->header.type == PERF_RECORD_EXIT) |
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nr_exit++; |
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perf_mmap__consume(&md->core); |
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} |
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perf_mmap__read_done(&md->core); |
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out_init: |
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if (!exited || !nr_exit) { |
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evlist__poll(evlist, -1); |
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if (retry_count++ > 1000) { |
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pr_debug("Failed after retrying 1000 times\n"); |
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err = -1; |
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goto out_delete_evlist; |
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} |
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goto retry; |
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} |
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if (nr_exit != 1) { |
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pr_debug("received %d EXIT records\n", nr_exit); |
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err = -1; |
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} |
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out_delete_evlist: |
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perf_cpu_map__put(cpus); |
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perf_thread_map__put(threads); |
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evlist__delete(evlist); |
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return err; |
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} |
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DEFINE_SUITE("Number of exit events of a simple workload", task_exit);
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