/* * Copyright (c) 2020 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <vnet/vnet.h> #include <vlibapi/api.h> #include <vlibmemory/api.h> #include <vnet/plugin/plugin.h> #include <vpp/app/version.h> #include <linux/limits.h> #include <sys/ioctl.h> #include <perfmon/perfmon.h> static_always_inline void perfmon_read_pmcs (u64 *counters, int *pmc_index, u8 n_counters) { switch (n_counters) { default: 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; } } static_always_inline int perfmon_calc_pmc_index (perfmon_thread_runtime_t *tr, u8 i) { return (int) (tr->mmap_pages[i]->index + tr->mmap_pages[i]->offset); } uword 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 = 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; int pmc_index[PERF_MAX_EVENTS]; u64 before[PERF_MAX_EVENTS]; u64 after[PERF_MAX_EVENTS]; uword rv; clib_prefetch_load (s); switch (n_events) { default: case 7: pmc_index[6] = perfmon_calc_pmc_index (rt, 6); case 6: pmc_index[5] = perfmon_calc_pmc_index (rt, 5); case 5: pmc_index[4] = perfmon_calc_pmc_index (rt, 4); case 4: pmc_index[3] = perfmon_calc_pmc_index (rt, 3); case 3: pmc_index[2] = perfmon_calc_pmc_index (rt, 2); case 2: pmc_index[1] = perfmon_calc_pmc_index (rt, 1); case 1: pmc_index[0] = perfmon_calc_pmc_index (rt, 0); break; } perfmon_read_pmcs (before, pmc_index, n_events); rv = node->function (vm, node, frame); perfmon_read_pmcs (after, pmc_index, n_events); if (rv == 0) return rv; s->n_calls += 1; s->n_packets += rv; for (int i = 0; i < n_events; i++) s->value[i] += after[i] - before[i]; return rv; }