#include <perfmon/perfmon.h>
-static_always_inline u64
-perfmon_mmap_read_pmc1 (const struct perf_event_mmap_page *mmap_page)
-{
- u64 count;
- 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
- {
- u32 idx;
-
- seq = mmap_page->lock;
- CLIB_COMPILER_BARRIER ();
-
- idx = mmap_page->index;
- count = mmap_page->offset;
- if (idx)
- count += _rdpmc (idx - 1);
-
- CLIB_COMPILER_BARRIER ();
- }
- while (mmap_page->lock != seq);
-
- return count;
-}
-
static_always_inline void
-perfmon_mmap_read_pmcs (u64 *counters,
- struct perf_event_mmap_page **mmap_pages,
- u8 n_counters)
+perfmon_read_pmcs (u64 *counters, u32 *indexes, u8 n_counters)
{
switch (n_counters)
{
- default:
case 12:
- counters[11] = perfmon_mmap_read_pmc1 (mmap_pages[11]);
+ counters[11] = _rdpmc (indexes[11] - 1);
case 11:
- counters[10] = perfmon_mmap_read_pmc1 (mmap_pages[10]);
+ counters[10] = _rdpmc (indexes[10] - 1);
case 10:
- counters[9] = perfmon_mmap_read_pmc1 (mmap_pages[9]);
+ counters[9] = _rdpmc (indexes[9] - 1);
case 9:
- counters[8] = perfmon_mmap_read_pmc1 (mmap_pages[8]);
+ counters[8] = _rdpmc (indexes[8] - 1);
case 8:
- counters[7] = perfmon_mmap_read_pmc1 (mmap_pages[7]);
+ counters[7] = _rdpmc (indexes[7] - 1);
case 7:
- counters[6] = perfmon_mmap_read_pmc1 (mmap_pages[6]);
+ counters[6] = _rdpmc (indexes[6] - 1);
case 6:
- counters[5] = perfmon_mmap_read_pmc1 (mmap_pages[5]);
+ counters[5] = _rdpmc (indexes[5] - 1);
case 5:
- counters[4] = perfmon_mmap_read_pmc1 (mmap_pages[4]);
+ counters[4] = _rdpmc (indexes[4] - 1);
case 4:
- counters[3] = perfmon_mmap_read_pmc1 (mmap_pages[3]);
+ counters[3] = _rdpmc (indexes[3] - 1);
case 3:
- counters[2] = perfmon_mmap_read_pmc1 (mmap_pages[2]);
+ counters[2] = _rdpmc (indexes[2] - 1);
case 2:
- counters[1] = perfmon_mmap_read_pmc1 (mmap_pages[1]);
+ counters[1] = _rdpmc (indexes[1] - 1);
case 1:
- counters[0] = perfmon_mmap_read_pmc1 (mmap_pages[0]);
- break;
+ counters[0] = _rdpmc (indexes[0] - 1);
}
}
uword
-perfmon_dispatch_wrapper_mmap (vlib_main_t *vm, vlib_node_runtime_t *node,
- vlib_frame_t *frame)
+perfmon_dispatch_wrapper (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame)
{
perfmon_main_t *pm = &perfmon_main;
perfmon_thread_runtime_t *rt =
u8 n_events = rt->n_events;
- u64 before[PERF_MAX_EVENTS];
- u64 after[PERF_MAX_EVENTS];
+ struct
+ {
+ u64 t[2][PERF_MAX_EVENTS];
+ } samples;
uword rv;
clib_prefetch_load (s);
- perfmon_mmap_read_pmcs (&before[0], rt->mmap_pages, n_events);
+ perfmon_read_pmcs (&samples.t[0][0], &rt->indexes[0], n_events);
rv = node->function (vm, node, frame);
- perfmon_mmap_read_pmcs (&after[0], rt->mmap_pages, n_events);
+ perfmon_read_pmcs (&samples.t[1][0], &rt->indexes[0], n_events);
if (rv == 0)
return rv;
s->n_packets += rv;
for (int i = 0; i < n_events; i++)
- s->value[i] += after[i] - before[i];
-
- return rv;
-}
-
-static_always_inline void
-perfmon_metric_read_pmcs (u64 *counters, int *pmc_index, u8 n_counters)
-{
- switch (n_counters)
{
- default:
- case 12:
- counters[11] = _rdpmc (pmc_index[11]);
- case 11:
- counters[10] = _rdpmc (pmc_index[10]);
- case 10:
- counters[9] = _rdpmc (pmc_index[9]);
- case 9:
- counters[8] = _rdpmc (pmc_index[8]);
- case 8:
- counters[7] = _rdpmc (pmc_index[7]);
- case 7:
- counters[6] = _rdpmc (pmc_index[6]);
- case 6:
- counters[5] = _rdpmc (pmc_index[5]);
- case 5:
- counters[4] = _rdpmc (pmc_index[4]);
- case 4:
- counters[3] = _rdpmc (pmc_index[3]);
- case 3:
- counters[2] = _rdpmc (pmc_index[2]);
- case 2:
- counters[1] = _rdpmc (pmc_index[1]);
- case 1:
- counters[0] = _rdpmc (pmc_index[0]);
- break;
+ if (!(rt->preserve_samples & 1 << i))
+ {
+ s->value[i] += samples.t[1][i] - samples.t[0][i];
+ }
+ else
+ {
+ s->t[0].value[i] = samples.t[0][i];
+ s->t[1].value[i] = samples.t[1][i];
+ }
}
-}
-
-static_always_inline int
-perfmon_metric_index (perfmon_bundle_t *b, u8 i)
-{
- return (int) (b->metrics[i]);
-}
-
-uword
-perfmon_dispatch_wrapper_metrics (vlib_main_t *vm, vlib_node_runtime_t *node,
- vlib_frame_t *frame)
-{
- perfmon_main_t *pm = &perfmon_main;
- perfmon_thread_runtime_t *rt =
- vec_elt_at_index (pm->thread_runtimes, vm->thread_index);
- perfmon_node_stats_t *s =
- vec_elt_at_index (rt->node_stats, node->node_index);
-
- u8 n_events = rt->n_events;
-
- u64 before[PERF_MAX_EVENTS];
- int pmc_index[PERF_MAX_EVENTS];
- uword rv;
-
- clib_prefetch_load (s);
-
- switch (n_events)
- {
- default:
- case 12:
- pmc_index[11] = perfmon_metric_index (rt->bundle, 11);
- case 11:
- pmc_index[10] = perfmon_metric_index (rt->bundle, 10);
- case 10:
- pmc_index[9] = perfmon_metric_index (rt->bundle, 9);
- case 9:
- pmc_index[8] = perfmon_metric_index (rt->bundle, 8);
- case 8:
- pmc_index[7] = perfmon_metric_index (rt->bundle, 7);
- case 7:
- pmc_index[6] = perfmon_metric_index (rt->bundle, 6);
- case 6:
- pmc_index[5] = perfmon_metric_index (rt->bundle, 5);
- case 5:
- pmc_index[4] = perfmon_metric_index (rt->bundle, 4);
- case 4:
- pmc_index[3] = perfmon_metric_index (rt->bundle, 3);
- case 3:
- pmc_index[2] = perfmon_metric_index (rt->bundle, 2);
- case 2:
- pmc_index[1] = perfmon_metric_index (rt->bundle, 1);
- case 1:
- pmc_index[0] = perfmon_metric_index (rt->bundle, 0);
- break;
- }
-
- perfmon_metric_read_pmcs (&before[0], pmc_index, n_events);
- rv = node->function (vm, node, frame);
-
- clib_memcpy_fast (&s->t[0].value[0], &before, sizeof (before));
- perfmon_metric_read_pmcs (&s->t[1].value[0], pmc_index, n_events);
-
- if (rv == 0)
- return rv;
-
- s->n_calls += 1;
- s->n_packets += rv;
return rv;
}
Code Review / vpp.git / blobdiff