1e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "evsel.h" 2e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "tests.h" 3e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "thread_map.h" 4e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "cpumap.h" 5e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include "debug.h" 6e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 7e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengint test__open_syscall_event_on_all_cpus(void) 8e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng{ 9e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng int err = -1, fd, cpu; 10e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct cpu_map *cpus; 11e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct perf_evsel *evsel; 12e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng unsigned int nr_open_calls = 111, i; 13e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng cpu_set_t cpu_set; 14e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX); 15e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 16e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (threads == NULL) { 17e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("thread_map__new\n"); 18e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return -1; 19e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 20e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 21e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng cpus = cpu_map__new(NULL); 22e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (cpus == NULL) { 23e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("cpu_map__new\n"); 24e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto out_thread_map_delete; 25e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 26e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 27e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng CPU_ZERO(&cpu_set); 28e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 29e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0); 30e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (evsel == NULL) { 31e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("is debugfs mounted on /sys/kernel/debug?\n"); 32e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto out_thread_map_delete; 33e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 34e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 35e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (perf_evsel__open(evsel, cpus, threads) < 0) { 36e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("failed to open counter: %s, " 37e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng "tweak /proc/sys/kernel/perf_event_paranoid?\n", 38e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng strerror(errno)); 39e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto out_evsel_delete; 40e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 41e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 42e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (cpu = 0; cpu < cpus->nr; ++cpu) { 43e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng unsigned int ncalls = nr_open_calls + cpu; 44e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 45e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * XXX eventually lift this restriction in a way that 46e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * keeps perf building on older glibc installations 47e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * without CPU_ALLOC. 1024 cpus in 2010 still seems 48e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * a reasonable upper limit tho :-) 49e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 50e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (cpus->map[cpu] >= CPU_SETSIZE) { 51e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("Ignoring CPU %d\n", cpus->map[cpu]); 52e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng continue; 53e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 54e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 55e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng CPU_SET(cpus->map[cpu], &cpu_set); 56e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { 57e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("sched_setaffinity() failed on CPU %d: %s ", 58e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng cpus->map[cpu], 59e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng strerror(errno)); 60e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto out_close_fd; 61e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 62e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (i = 0; i < ncalls; ++i) { 63e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng fd = open("/etc/passwd", O_RDONLY); 64e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng close(fd); 65e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 66e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng CPU_CLR(cpus->map[cpu], &cpu_set); 67e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 68e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 69e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng /* 70e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Here we need to explicitely preallocate the counts, as if 71e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * we use the auto allocation it will allocate just for 1 cpu, 72e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * as we start by cpu 0. 73e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 74e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) { 75e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr); 76e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng goto out_close_fd; 77e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 78e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 79e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng err = 0; 80e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 81e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng for (cpu = 0; cpu < cpus->nr; ++cpu) { 82e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng unsigned int expected; 83e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 84e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (cpus->map[cpu] >= CPU_SETSIZE) 85e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng continue; 86e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 87e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) { 88e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("perf_evsel__read_on_cpu\n"); 89e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng err = -1; 90e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng break; 91e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 92e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 93e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng expected = nr_open_calls + cpu; 94e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng if (evsel->counts->cpu[cpu].val != expected) { 95e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n", 96e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng expected, cpus->map[cpu], evsel->counts->cpu[cpu].val); 97e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng err = -1; 98e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 99e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng } 100e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 101e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng perf_evsel__free_counts(evsel); 102e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengout_close_fd: 103e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng perf_evsel__close_fd(evsel, 1, threads->nr); 104e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengout_evsel_delete: 105e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng perf_evsel__delete(evsel); 106e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengout_thread_map_delete: 107e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng thread_map__delete(threads); 108e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng return err; 109e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng} 110