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/*
* 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 <vpp/app/version.h>
#include <linux/limits.h>
#include <sys/ioctl.h>
#include <perfmon/perfmon.h>
#include <linux/perf_event.h>
#define foreach_perf_sw_counter \
_ (CONTEXT_SWITCHES, "context-switches") \
_ (PAGE_FAULTS_MIN, "page-faults-minor") \
_ (PAGE_FAULTS_MAJ, "page-faults-major")
typedef enum
{
#define _(n, s) n,
foreach_perf_sw_counter
#undef _
} linux_sw_events;
static perfmon_event_t events[] = {
#define _(n, s) \
[n] = { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##n, .name = s },
foreach_perf_sw_counter
#undef _
};
PERFMON_REGISTER_SOURCE (linux) = {
.name = "linux",
.description = "Linux kernel performance counters",
.events = events,
.n_events = ARRAY_LEN (events),
};
static u8 *
format_context_switches (u8 *s, va_list *args)
{
perfmon_reading_t *r = va_arg (*args, perfmon_reading_t *);
int row = va_arg (*args, int);
f64 t = (f64) r->time_running * 1e-9;
switch (row)
{
case 0:
s = format (s, "%9.2f", t);
break;
case 1:
if (r->time_running)
s = format (s, "%9.2f", (f64) r->value[0] / t);
break;
}
return s;
}
PERFMON_REGISTER_BUNDLE (context_switches) = {
.name = "context-switches",
.description = "per-thread context switches",
.source = "linux",
.type = PERFMON_BUNDLE_TYPE_THREAD,
.events[0] = CONTEXT_SWITCHES,
.n_events = 1,
.format_fn = format_context_switches,
.column_headers = PERFMON_STRINGS ("RunTime", "ContextSwitches/Sec"),
};
static u8 *
format_page_faults (u8 *s, va_list *args)
{
perfmon_reading_t *r = va_arg (*args, perfmon_reading_t *);
int row = va_arg (*args, int);
f64 t = (f64) r->time_running * 1e-9;
switch (row)
{
case 0:
s = format (s, "%9.2f", t);
break;
case 1:
if (r->time_running)
s = format (s, "%9.2f", (f64) r->value[0] / t);
break;
case 2:
if (r->time_running)
s = format (s, "%9.2f", (f64) r->value[1] / t);
break;
}
return s;
}
PERFMON_REGISTER_BUNDLE (page_faults) = {
.name = "page-faults",
.description = "per-thread page faults",
.source = "linux",
.type = PERFMON_BUNDLE_TYPE_THREAD,
.events[0] = PAGE_FAULTS_MIN,
.events[1] = PAGE_FAULTS_MAJ,
.n_events = 2,
.format_fn = format_page_faults,
.column_headers = PERFMON_STRINGS ("RunTime", "MinorPageFaults/Sec",
"MajorPageFaults/Sec"),
};
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