vec_validate (pm->group_fds, i);
pm->group_fds[i] = -1;
+ u8 n_events_opened = 0;
for (int j = 0; j < b->n_events; j++)
{
int fd;
perfmon_event_t *e = s->events + b->events[j];
+ if (!e->implemented)
+ continue;
struct perf_event_attr pe = {
.size = sizeof (struct perf_event_attr),
.type = e->type_from_instance ? in->type : e->type,
.config = e->config,
+ .config1 = e->config1,
.exclude_kernel = e->exclude_kernel,
.read_format =
(PERF_FORMAT_GROUP | PERF_FORMAT_TOTAL_TIME_ENABLED |
.disabled = 1,
};
+ perf_event_open:
log_debug ("perf_event_open pe.type=%u pe.config=0x%x pid=%d "
"cpu=%d group_fd=%d",
pe.type, pe.config, in->pid, in->cpu, pm->group_fds[i]);
if (fd == -1)
{
- err = clib_error_return_unix (0, "perf_event_open");
- goto error;
+ if (errno ==
+ EOPNOTSUPP) /* 64b counters not supported on aarch64 */
+ {
+ pe.config1 = 2; /* retry with 32b counter width */
+ goto perf_event_open;
+ }
+ else
+ {
+ err = clib_error_return_unix (0, "perf_event_open");
+ goto error;
+ }
}
vec_add1 (pm->fds_to_close, fd);
{
perfmon_thread_runtime_t *tr;
tr = vec_elt_at_index (pm->thread_runtimes, i);
- tr->mmap_pages[j] =
+ tr->mmap_pages[n_events_opened] =
mmap (0, page_size, PROT_READ, MAP_SHARED, fd, 0);
- if (tr->mmap_pages[j] == MAP_FAILED)
+ if (tr->mmap_pages[n_events_opened] == MAP_FAILED)
{
err = clib_error_return_unix (0, "mmap");
goto error;
}
}
+ n_events_opened++;
}
- if (is_node)
+ if (is_node && n_events_opened)
{
perfmon_thread_runtime_t *rt;
rt = vec_elt_at_index (pm->thread_runtimes, i);
rt->bundle = b;
- rt->n_events = b->n_events;
+ rt->n_events = n_events_opened;
rt->n_nodes = n_nodes;
rt->preserve_samples = b->preserve_samples;
vec_validate_aligned (rt->node_stats, n_nodes - 1,
return err;
}
-static_always_inline u32
-perfmon_mmap_read_index (const struct perf_event_mmap_page *mmap_page)
-{
- u32 idx;
- u32 seq;
-
- /* See documentation in /usr/include/linux/perf_event.h, for more details
- * but the 2 main important things are:
- * 1) if seq != mmap_page->lock, it means the kernel is currently updating
- * the user page and we need to read it again
- * 2) if idx == 0, it means the perf event is currently turned off and we
- * just need to read the kernel-updated 'offset', otherwise we must also
- * add the current hw value (hence rdmpc) */
- do
- {
- seq = mmap_page->lock;
- CLIB_COMPILER_BARRIER ();
-
- idx = mmap_page->index;
-
- CLIB_COMPILER_BARRIER ();
- }
- while (mmap_page->lock != seq);
-
- return idx;
-}
-
clib_error_t *
perfmon_start (vlib_main_t *vm, perfmon_bundle_t *b)
{
}
if (b->active_type == PERFMON_BUNDLE_TYPE_NODE)
{
- for (int i = 0; i < vec_len (pm->thread_runtimes); i++)
+ vlib_node_function_t *dispatch_wrapper = NULL;
+ err = b->src->config_dispatch_wrapper (b, &dispatch_wrapper);
+ if (err || !dispatch_wrapper)
{
- perfmon_thread_runtime_t *tr;
- tr = vec_elt_at_index (pm->thread_runtimes, i);
-
- for (int j = 0; j < b->n_events; j++)
- {
- tr->indexes[j] = perfmon_mmap_read_index (tr->mmap_pages[j]);
-
- /* if a zero index is returned generate error */
- if (!tr->indexes[j])
- {
- perfmon_reset (vm);
- return clib_error_return (0, "invalid rdpmc index");
- }
- }
+ perfmon_reset (vm);
+ return err;
}
for (int i = 0; i < vlib_get_n_threads (); i++)
- vlib_node_set_dispatch_wrapper (
- vlib_get_main_by_index (i), perfmon_dispatch_wrappers[b->n_events]);
+ vlib_node_set_dispatch_wrapper (vlib_get_main_by_index (i),
+ dispatch_wrapper);
}
pm->sample_time = vlib_time_now (vm);
pm->is_running = 1;
return 0;
}
-static_always_inline u8
-is_enough_counters (perfmon_bundle_t *b)
-{
- u8 bl[PERFMON_EVENT_TYPE_MAX];
- u8 cpu[PERFMON_EVENT_TYPE_MAX];
-
- clib_memset (&bl, 0, sizeof (bl));
- clib_memset (&cpu, 0, sizeof (cpu));
-
- /* how many does this uarch support */
- if (!clib_get_pmu_counter_count (&cpu[PERFMON_EVENT_TYPE_FIXED],
- &cpu[PERFMON_EVENT_TYPE_GENERAL]))
- return 0;
-
- /* how many does the bundle require */
- for (u16 i = 0; i < b->n_events; i++)
- {
- /* if source allows us to identify events, otherwise assume general */
- if (b->src->get_event_type)
- bl[b->src->get_event_type (b->events[i])]++;
- else
- bl[PERFMON_EVENT_TYPE_GENERAL]++;
- }
-
- /* consciously ignoring pseudo events here */
- return cpu[PERFMON_EVENT_TYPE_GENERAL] >= bl[PERFMON_EVENT_TYPE_GENERAL] &&
- cpu[PERFMON_EVENT_TYPE_FIXED] >= bl[PERFMON_EVENT_TYPE_FIXED];
-}
-
-static_always_inline u8
-is_bundle_supported (perfmon_bundle_t *b)
-{
- perfmon_cpu_supports_t *supports = b->cpu_supports;
-
- if (!is_enough_counters (b))
- return 0;
-
- if (!b->cpu_supports)
- return 1;
-
- for (int i = 0; i < b->n_cpu_supports; ++i)
- if (supports[i].cpu_supports ())
- return 1;
-
- return 0;
-}
-
static clib_error_t *
perfmon_init (vlib_main_t *vm)
{
}
b->src = (perfmon_source_t *) p[0];
- if (!is_bundle_supported (b))
+ if (b->src->bundle_support && !b->src->bundle_support (b))
{
log_debug ("skipping bundle '%s' - not supported", b->name);
b = b->next;
Code Review / vpp.git / blobdiff