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 <vnet/vnet.h>
18 #include <vlibapi/api.h>
19 #include <vlibmemory/api.h>
20 #include <vpp/app/version.h>
21 #include <linux/limits.h>
22 #include <sys/ioctl.h>
24 #include <perfmon/perfmon.h>
26 #include <linux/perf_event.h>
28 #define foreach_perf_sw_counter \
29 _ (CONTEXT_SWITCHES, "context-switches") \
30 _ (PAGE_FAULTS_MIN, "page-faults-minor") \
31 _ (PAGE_FAULTS_MAJ, "page-faults-major")
36 foreach_perf_sw_counter
40 static perfmon_event_t events[] = {
43 .type = PERF_TYPE_SOFTWARE, \
44 .config = PERF_COUNT_SW_##n, \
48 foreach_perf_sw_counter
52 PERFMON_REGISTER_SOURCE (linux) = {
54 .description = "Linux kernel performance counters",
56 .n_events = ARRAY_LEN (events),
60 format_context_switches (u8 *s, va_list *args)
62 perfmon_reading_t *r = va_arg (*args, perfmon_reading_t *);
63 int row = va_arg (*args, int);
64 f64 t = (f64) r->time_running * 1e-9;
69 s = format (s, "%9.2f", t);
73 s = format (s, "%9.2f", (f64) r->value[0] / t);
79 PERFMON_REGISTER_BUNDLE (context_switches) = {
80 .name = "context-switches",
81 .description = "per-thread context switches",
83 .type = PERFMON_BUNDLE_TYPE_THREAD,
84 .events[0] = CONTEXT_SWITCHES,
86 .format_fn = format_context_switches,
87 .column_headers = PERFMON_STRINGS ("RunTime", "ContextSwitches/Sec"),
91 format_page_faults (u8 *s, va_list *args)
93 perfmon_reading_t *r = va_arg (*args, perfmon_reading_t *);
94 int row = va_arg (*args, int);
95 f64 t = (f64) r->time_running * 1e-9;
100 s = format (s, "%9.2f", t);
104 s = format (s, "%9.2f", (f64) r->value[0] / t);
108 s = format (s, "%9.2f", (f64) r->value[1] / t);
114 PERFMON_REGISTER_BUNDLE (page_faults) = {
115 .name = "page-faults",
116 .description = "per-thread page faults",
118 .type = PERFMON_BUNDLE_TYPE_THREAD,
119 .events[0] = PAGE_FAULTS_MIN,
120 .events[1] = PAGE_FAULTS_MAJ,
122 .format_fn = format_page_faults,
123 .column_headers = PERFMON_STRINGS ("RunTime", "MinorPageFaults/Sec",
124 "MajorPageFaults/Sec"),