goto out;
}
-static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
+int copy_config_terms(struct list_head *dst, struct list_head *src)
{
struct evsel_config_term *pos, *tmp;
- list_for_each_entry(pos, &src->config_terms, list) {
+ list_for_each_entry(pos, src, list) {
tmp = malloc(sizeof(*tmp));
if (tmp == NULL)
return -ENOMEM;
return -ENOMEM;
}
}
- list_add_tail(&tmp->list, &dst->config_terms);
+ list_add_tail(&tmp->list, dst);
}
return 0;
}
+static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
+{
+ return copy_config_terms(&dst->config_terms, &src->config_terms);
+}
+
/**
* evsel__clone - create a new evsel copied from @orig
* @orig: original evsel
return err;
}
-static void evsel__free_config_terms(struct evsel *evsel)
+void free_config_terms(struct list_head *config_terms)
{
struct evsel_config_term *term, *h;
- list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
+ list_for_each_entry_safe(term, h, config_terms, list) {
list_del_init(&term->list);
if (term->free_str)
zfree(&term->val.str);
}
}
+static void evsel__free_config_terms(struct evsel *evsel)
+{
+ free_config_terms(&evsel->config_terms);
+}
+
void evsel__exit(struct evsel *evsel)
{
assert(list_empty(&evsel->core.node));
return 0;
}
-static bool ignore_missing_thread(struct evsel *evsel,
+bool evsel__ignore_missing_thread(struct evsel *evsel,
int nr_cpus, int cpu,
struct perf_thread_map *threads,
int thread, int err)
}
}
-static int perf_event_open(struct evsel *evsel,
- pid_t pid, int cpu, int group_fd,
- unsigned long flags)
+bool evsel__precise_ip_fallback(struct evsel *evsel)
{
- int precise_ip = evsel->core.attr.precise_ip;
- int fd;
-
- while (1) {
- pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
- pid, cpu, group_fd, flags);
-
- fd = sys_perf_event_open(&evsel->core.attr, pid, cpu, group_fd, flags);
- if (fd >= 0)
- break;
-
- /* Do not try less precise if not requested. */
- if (!evsel->precise_max)
- break;
-
- /*
- * We tried all the precise_ip values, and it's
- * still failing, so leave it to standard fallback.
- */
- if (!evsel->core.attr.precise_ip) {
- evsel->core.attr.precise_ip = precise_ip;
- break;
- }
+ /* Do not try less precise if not requested. */
+ if (!evsel->precise_max)
+ return false;
- pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", -ENOTSUP);
- evsel->core.attr.precise_ip--;
- pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
- display_attr(&evsel->core.attr);
+ /*
+ * We tried all the precise_ip values, and it's
+ * still failing, so leave it to standard fallback.
+ */
+ if (!evsel->core.attr.precise_ip) {
+ evsel->core.attr.precise_ip = evsel->precise_ip_original;
+ return false;
}
- return fd;
+ if (!evsel->precise_ip_original)
+ evsel->precise_ip_original = evsel->core.attr.precise_ip;
+
+ evsel->core.attr.precise_ip--;
+ pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
+ display_attr(&evsel->core.attr);
+ return true;
}
-static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
- struct perf_thread_map *threads,
- int start_cpu, int end_cpu)
+static struct perf_cpu_map *empty_cpu_map;
+static struct perf_thread_map *empty_thread_map;
+
+static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads)
{
- int cpu, thread, nthreads;
- unsigned long flags = PERF_FLAG_FD_CLOEXEC;
- int pid = -1, err, old_errno;
- enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
+ int nthreads;
if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
(perf_missing_features.aux_output && evsel->core.attr.aux_output))
return -EINVAL;
if (cpus == NULL) {
- static struct perf_cpu_map *empty_cpu_map;
-
if (empty_cpu_map == NULL) {
empty_cpu_map = perf_cpu_map__dummy_new();
if (empty_cpu_map == NULL)
}
if (threads == NULL) {
- static struct perf_thread_map *empty_thread_map;
-
if (empty_thread_map == NULL) {
empty_thread_map = thread_map__new_by_tid(-1);
if (empty_thread_map == NULL)
perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0)
return -ENOMEM;
- if (evsel->cgrp) {
- flags |= PERF_FLAG_PID_CGROUP;
- pid = evsel->cgrp->fd;
- }
+ evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
+ if (evsel->cgrp)
+ evsel->open_flags |= PERF_FLAG_PID_CGROUP;
-fallback_missing_features:
+ return 0;
+}
+
+static void evsel__disable_missing_features(struct evsel *evsel)
+{
if (perf_missing_features.weight_struct) {
evsel__set_sample_bit(evsel, WEIGHT);
evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
evsel->core.attr.clockid = 0;
}
if (perf_missing_features.cloexec)
- flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
+ evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
if (perf_missing_features.mmap2)
evsel->core.attr.mmap2 = 0;
if (perf_missing_features.exclude_guest)
evsel->core.attr.bpf_event = 0;
if (perf_missing_features.branch_hw_idx)
evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
-retry_sample_id:
if (perf_missing_features.sample_id_all)
evsel->core.attr.sample_id_all = 0;
+}
- display_attr(&evsel->core.attr);
-
- for (cpu = start_cpu; cpu < end_cpu; cpu++) {
-
- for (thread = 0; thread < nthreads; thread++) {
- int fd, group_fd;
-
- if (!evsel->cgrp && !evsel->core.system_wide)
- pid = perf_thread_map__pid(threads, thread);
-
- group_fd = get_group_fd(evsel, cpu, thread);
-retry_open:
- test_attr__ready();
-
- fd = perf_event_open(evsel, pid, cpus->map[cpu],
- group_fd, flags);
-
- FD(evsel, cpu, thread) = fd;
-
- bpf_counter__install_pe(evsel, cpu, fd);
-
- if (unlikely(test_attr__enabled)) {
- test_attr__open(&evsel->core.attr, pid, cpus->map[cpu],
- fd, group_fd, flags);
- }
-
- if (fd < 0) {
- err = -errno;
-
- if (ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) {
- /*
- * We just removed 1 thread, so take a step
- * back on thread index and lower the upper
- * nthreads limit.
- */
- nthreads--;
- thread--;
-
- /* ... and pretend like nothing have happened. */
- err = 0;
- continue;
- }
-
- pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
- err);
- goto try_fallback;
- }
-
- pr_debug2_peo(" = %d\n", fd);
-
- if (evsel->bpf_fd >= 0) {
- int evt_fd = fd;
- int bpf_fd = evsel->bpf_fd;
-
- err = ioctl(evt_fd,
- PERF_EVENT_IOC_SET_BPF,
- bpf_fd);
- if (err && errno != EEXIST) {
- pr_err("failed to attach bpf fd %d: %s\n",
- bpf_fd, strerror(errno));
- err = -EINVAL;
- goto out_close;
- }
- }
-
- set_rlimit = NO_CHANGE;
-
- /*
- * If we succeeded but had to kill clockid, fail and
- * have evsel__open_strerror() print us a nice error.
- */
- if (perf_missing_features.clockid ||
- perf_missing_features.clockid_wrong) {
- err = -EINVAL;
- goto out_close;
- }
- }
- }
-
- return 0;
+int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads)
+{
+ int err;
-try_fallback:
- /*
- * perf stat needs between 5 and 22 fds per CPU. When we run out
- * of them try to increase the limits.
- */
- if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
- struct rlimit l;
+ err = __evsel__prepare_open(evsel, cpus, threads);
+ if (err)
+ return err;
- old_errno = errno;
- if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
- if (set_rlimit == NO_CHANGE)
- l.rlim_cur = l.rlim_max;
- else {
- l.rlim_cur = l.rlim_max + 1000;
- l.rlim_max = l.rlim_cur;
- }
- if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
- set_rlimit++;
- errno = old_errno;
- goto retry_open;
- }
- }
- errno = old_errno;
- }
+ evsel__disable_missing_features(evsel);
- if (err != -EINVAL || cpu > 0 || thread > 0)
- goto out_close;
+ return err;
+}
+bool evsel__detect_missing_features(struct evsel *evsel)
+{
/*
* Must probe features in the order they were added to the
* perf_event_attr interface.
(evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
perf_missing_features.weight_struct = true;
pr_debug2("switching off weight struct support\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.code_page_size &&
(evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
perf_missing_features.code_page_size = true;
pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
- goto out_close;
+ return false;
} else if (!perf_missing_features.data_page_size &&
(evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
perf_missing_features.data_page_size = true;
pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
- goto out_close;
+ return false;
} else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
perf_missing_features.cgroup = true;
pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
- goto out_close;
- } else if (!perf_missing_features.branch_hw_idx &&
+ return false;
+ } else if (!perf_missing_features.branch_hw_idx &&
(evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
perf_missing_features.branch_hw_idx = true;
pr_debug2("switching off branch HW index support\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
perf_missing_features.aux_output = true;
pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
- goto out_close;
+ return false;
} else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
perf_missing_features.bpf = true;
pr_debug2_peo("switching off bpf_event\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
perf_missing_features.ksymbol = true;
pr_debug2_peo("switching off ksymbol\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
perf_missing_features.write_backward = true;
pr_debug2_peo("switching off write_backward\n");
- goto out_close;
+ return false;
} else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
perf_missing_features.clockid_wrong = true;
pr_debug2_peo("switching off clockid\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
perf_missing_features.clockid = true;
pr_debug2_peo("switching off use_clockid\n");
- goto fallback_missing_features;
- } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
+ return true;
+ } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
perf_missing_features.cloexec = true;
pr_debug2_peo("switching off cloexec flag\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
perf_missing_features.mmap2 = true;
pr_debug2_peo("switching off mmap2\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.exclude_guest &&
(evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host)) {
perf_missing_features.exclude_guest = true;
pr_debug2_peo("switching off exclude_guest, exclude_host\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.sample_id_all) {
perf_missing_features.sample_id_all = true;
pr_debug2_peo("switching off sample_id_all\n");
- goto retry_sample_id;
+ return true;
} else if (!perf_missing_features.lbr_flags &&
(evsel->core.attr.branch_sample_type &
(PERF_SAMPLE_BRANCH_NO_CYCLES |
PERF_SAMPLE_BRANCH_NO_FLAGS))) {
perf_missing_features.lbr_flags = true;
pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
- goto fallback_missing_features;
+ return true;
} else if (!perf_missing_features.group_read &&
evsel->core.attr.inherit &&
(evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
evsel__is_group_leader(evsel)) {
perf_missing_features.group_read = true;
pr_debug2_peo("switching off group read\n");
- goto fallback_missing_features;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
+{
+ int old_errno;
+ struct rlimit l;
+
+ if (*set_rlimit < INCREASED_MAX) {
+ old_errno = errno;
+
+ if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
+ if (*set_rlimit == NO_CHANGE) {
+ l.rlim_cur = l.rlim_max;
+ } else {
+ l.rlim_cur = l.rlim_max + 1000;
+ l.rlim_max = l.rlim_cur;
+ }
+ if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
+ (*set_rlimit) += 1;
+ errno = old_errno;
+ return true;
+ }
+ }
+ errno = old_errno;
+ }
+
+ return false;
+}
+
+static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
+ struct perf_thread_map *threads,
+ int start_cpu, int end_cpu)
+{
+ int cpu, thread, nthreads;
+ int pid = -1, err, old_errno;
+ enum rlimit_action set_rlimit = NO_CHANGE;
+
+ err = __evsel__prepare_open(evsel, cpus, threads);
+ if (err)
+ return err;
+
+ if (cpus == NULL)
+ cpus = empty_cpu_map;
+
+ if (threads == NULL)
+ threads = empty_thread_map;
+
+ if (evsel->core.system_wide)
+ nthreads = 1;
+ else
+ nthreads = threads->nr;
+
+ if (evsel->cgrp)
+ pid = evsel->cgrp->fd;
+
+fallback_missing_features:
+ evsel__disable_missing_features(evsel);
+
+ display_attr(&evsel->core.attr);
+
+ for (cpu = start_cpu; cpu < end_cpu; cpu++) {
+
+ for (thread = 0; thread < nthreads; thread++) {
+ int fd, group_fd;
+retry_open:
+ if (thread >= nthreads)
+ break;
+
+ if (!evsel->cgrp && !evsel->core.system_wide)
+ pid = perf_thread_map__pid(threads, thread);
+
+ group_fd = get_group_fd(evsel, cpu, thread);
+
+ test_attr__ready();
+
+ pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
+ pid, cpus->map[cpu], group_fd, evsel->open_flags);
+
+ fd = sys_perf_event_open(&evsel->core.attr, pid, cpus->map[cpu],
+ group_fd, evsel->open_flags);
+
+ FD(evsel, cpu, thread) = fd;
+
+ if (fd < 0) {
+ err = -errno;
+
+ pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
+ err);
+ goto try_fallback;
+ }
+
+ bpf_counter__install_pe(evsel, cpu, fd);
+
+ if (unlikely(test_attr__enabled)) {
+ test_attr__open(&evsel->core.attr, pid, cpus->map[cpu],
+ fd, group_fd, evsel->open_flags);
+ }
+
+ pr_debug2_peo(" = %d\n", fd);
+
+ if (evsel->bpf_fd >= 0) {
+ int evt_fd = fd;
+ int bpf_fd = evsel->bpf_fd;
+
+ err = ioctl(evt_fd,
+ PERF_EVENT_IOC_SET_BPF,
+ bpf_fd);
+ if (err && errno != EEXIST) {
+ pr_err("failed to attach bpf fd %d: %s\n",
+ bpf_fd, strerror(errno));
+ err = -EINVAL;
+ goto out_close;
+ }
+ }
+
+ set_rlimit = NO_CHANGE;
+
+ /*
+ * If we succeeded but had to kill clockid, fail and
+ * have evsel__open_strerror() print us a nice error.
+ */
+ if (perf_missing_features.clockid ||
+ perf_missing_features.clockid_wrong) {
+ err = -EINVAL;
+ goto out_close;
+ }
+ }
+ }
+
+ return 0;
+
+try_fallback:
+ if (evsel__precise_ip_fallback(evsel))
+ goto retry_open;
+
+ if (evsel__ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) {
+ /* We just removed 1 thread, so lower the upper nthreads limit. */
+ nthreads--;
+
+ /* ... and pretend like nothing have happened. */
+ err = 0;
+ goto retry_open;
}
+ /*
+ * perf stat needs between 5 and 22 fds per CPU. When we run out
+ * of them try to increase the limits.
+ */
+ if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
+ goto retry_open;
+
+ if (err != -EINVAL || cpu > 0 || thread > 0)
+ goto out_close;
+
+ if (evsel__detect_missing_features(evsel))
+ goto fallback_missing_features;
out_close:
if (err)
threads->err_thread = thread;
projects / linux-2.6-microblaze.git / blobdiff