diff options
Diffstat (limited to 'tools/perf/bench/breakpoint.c')
| -rw-r--r-- | tools/perf/bench/breakpoint.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/tools/perf/bench/breakpoint.c b/tools/perf/bench/breakpoint.c index 41385f89ffc7..dfd18f5db97d 100644 --- a/tools/perf/bench/breakpoint.c +++ b/tools/perf/bench/breakpoint.c @@ -47,6 +47,7 @@ struct breakpoint { static int breakpoint_setup(void *addr) { struct perf_event_attr attr = { .size = 0, }; + int fd; attr.type = PERF_TYPE_BREAKPOINT; attr.size = sizeof(attr); @@ -56,7 +57,12 @@ static int breakpoint_setup(void *addr) attr.bp_addr = (unsigned long)addr; attr.bp_type = HW_BREAKPOINT_RW; attr.bp_len = HW_BREAKPOINT_LEN_1; - return syscall(SYS_perf_event_open, &attr, 0, -1, -1, 0); + fd = syscall(SYS_perf_event_open, &attr, 0, -1, -1, 0); + + if (fd < 0) + fd = -errno; + + return fd; } static void *passive_thread(void *arg) @@ -122,8 +128,14 @@ int bench_breakpoint_thread(int argc, const char **argv) for (i = 0; i < thread_params.nbreakpoints; i++) { breakpoints[i].fd = breakpoint_setup(&breakpoints[i].watched); - if (breakpoints[i].fd == -1) + + if (breakpoints[i].fd < 0) { + if (breakpoints[i].fd == -ENODEV) { + printf("Skipping perf bench breakpoint thread: No hardware support\n"); + return 0; + } exit((perror("perf_event_open"), EXIT_FAILURE)); + } } gettimeofday(&start, NULL); for (i = 0; i < thread_params.nparallel; i++) { @@ -196,8 +208,14 @@ int bench_breakpoint_enable(int argc, const char **argv) exit(EXIT_FAILURE); } fd = breakpoint_setup(&watched); - if (fd == -1) + + if (fd < 0) { + if (fd == -ENODEV) { + printf("Skipping perf bench breakpoint enable: No hardware support\n"); + return 0; + } exit((perror("perf_event_open"), EXIT_FAILURE)); + } nthreads = enable_params.npassive + enable_params.nactive; threads = calloc(nthreads, sizeof(threads[0])); if (!threads) |