2 * Copyright (c) 2020 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include "vppinfra/string.h"
17 #include <vnet/vnet.h>
19 #include <vlibapi/api.h>
20 #include <vlibmemory/api.h>
21 #include <vnet/plugin/plugin.h>
22 #include <vpp/app/version.h>
23 #include <linux/limits.h>
24 #include <sys/ioctl.h>
26 #include <perfmon/perfmon.h>
28 static_always_inline void
29 perfmon_read_pmcs (u64 *counters, int *pmc_index, u8 n_counters)
35 counters[6] = _rdpmc (pmc_index[6]);
37 counters[5] = _rdpmc (pmc_index[5]);
39 counters[4] = _rdpmc (pmc_index[4]);
41 counters[3] = _rdpmc (pmc_index[3]);
43 counters[2] = _rdpmc (pmc_index[2]);
45 counters[1] = _rdpmc (pmc_index[1]);
47 counters[0] = _rdpmc (pmc_index[0]);
52 static_always_inline int
53 perfmon_calc_mmap_offset (perfmon_thread_runtime_t *tr, u8 i)
55 return (int) (tr->mmap_pages[i]->index + tr->mmap_pages[i]->offset);
58 static_always_inline int
59 perfmon_metric_index (perfmon_bundle_t *b, u8 i)
61 return (int) (b->metrics[i]);
65 perfmon_dispatch_wrapper_mmap (vlib_main_t *vm, vlib_node_runtime_t *node,
68 perfmon_main_t *pm = &perfmon_main;
69 perfmon_thread_runtime_t *rt =
70 vec_elt_at_index (pm->thread_runtimes, vm->thread_index);
71 perfmon_node_stats_t *s =
72 vec_elt_at_index (rt->node_stats, node->node_index);
74 u8 n_events = rt->n_events;
76 u64 before[PERF_MAX_EVENTS];
77 u64 after[PERF_MAX_EVENTS];
78 int pmc_index[PERF_MAX_EVENTS];
81 clib_prefetch_load (s);
87 pmc_index[6] = perfmon_calc_mmap_offset (rt, 6);
89 pmc_index[5] = perfmon_calc_mmap_offset (rt, 5);
91 pmc_index[4] = perfmon_calc_mmap_offset (rt, 4);
93 pmc_index[3] = perfmon_calc_mmap_offset (rt, 3);
95 pmc_index[2] = perfmon_calc_mmap_offset (rt, 2);
97 pmc_index[1] = perfmon_calc_mmap_offset (rt, 1);
99 pmc_index[0] = perfmon_calc_mmap_offset (rt, 0);
103 perfmon_read_pmcs (&before[0], pmc_index, n_events);
104 rv = node->function (vm, node, frame);
105 perfmon_read_pmcs (&after[0], pmc_index, n_events);
113 for (int i = 0; i < n_events; i++)
114 s->value[i] += after[i] - before[i];
120 perfmon_dispatch_wrapper_metrics (vlib_main_t *vm, vlib_node_runtime_t *node,
123 perfmon_main_t *pm = &perfmon_main;
124 perfmon_thread_runtime_t *rt =
125 vec_elt_at_index (pm->thread_runtimes, vm->thread_index);
126 perfmon_node_stats_t *s =
127 vec_elt_at_index (rt->node_stats, node->node_index);
129 u8 n_events = rt->n_events;
131 u64 before[PERF_MAX_EVENTS];
132 int pmc_index[PERF_MAX_EVENTS];
135 clib_prefetch_load (s);
141 pmc_index[6] = perfmon_metric_index (rt->bundle, 6);
143 pmc_index[5] = perfmon_metric_index (rt->bundle, 5);
145 pmc_index[4] = perfmon_metric_index (rt->bundle, 4);
147 pmc_index[3] = perfmon_metric_index (rt->bundle, 3);
149 pmc_index[2] = perfmon_metric_index (rt->bundle, 2);
151 pmc_index[1] = perfmon_metric_index (rt->bundle, 1);
153 pmc_index[0] = perfmon_metric_index (rt->bundle, 0);
157 perfmon_read_pmcs (&before[0], pmc_index, n_events);
158 rv = node->function (vm, node, frame);
160 clib_memcpy_fast (&s->t[0].value[0], &before, sizeof (before));
161 perfmon_read_pmcs (&s->t[1].value[0], pmc_index, n_events);