568 lines
14 KiB
Go
568 lines
14 KiB
Go
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// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collector
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import (
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"fmt"
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"runtime"
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perf "github.com/hodgesds/perf-utils"
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"github.com/prometheus/client_golang/prometheus"
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)
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const (
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perfSubsystem = "perf"
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)
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func init() {
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registerCollector(perfSubsystem, defaultDisabled, NewPerfCollector)
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}
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// perfCollector is a Collecter that uses the perf subsystem to collect
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// metrics. It uses perf_event_open an ioctls for profiling. Due to the fact
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// that the perf subsystem is highly dependent on kernel configuration and
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// settings not all profiler values may be exposed on the target system at any
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// given time.
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type perfCollector struct {
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perfHwProfilers map[int]perf.HardwareProfiler
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perfSwProfilers map[int]perf.SoftwareProfiler
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perfCacheProfilers map[int]perf.CacheProfiler
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desc map[string]*prometheus.Desc
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}
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// NewPerfCollector returns a new perf based collector, it creates a profiler
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// per CPU.
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func NewPerfCollector() (Collector, error) {
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collector := &perfCollector{
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perfHwProfilers: map[int]perf.HardwareProfiler{},
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perfSwProfilers: map[int]perf.SoftwareProfiler{},
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perfCacheProfilers: map[int]perf.CacheProfiler{},
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}
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ncpus := runtime.NumCPU()
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for i := 0; i < ncpus; i++ {
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// Use -1 to profile all processes on the CPU, see:
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// man perf_event_open
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collector.perfHwProfilers[i] = perf.NewHardwareProfiler(-1, i)
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if err := collector.perfHwProfilers[i].Start(); err != nil {
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return collector, err
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}
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collector.perfSwProfilers[i] = perf.NewSoftwareProfiler(-1, i)
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if err := collector.perfSwProfilers[i].Start(); err != nil {
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return collector, err
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}
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collector.perfCacheProfilers[i] = perf.NewCacheProfiler(-1, i)
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if err := collector.perfCacheProfilers[i].Start(); err != nil {
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return collector, err
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}
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}
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collector.desc = map[string]*prometheus.Desc{
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"cpucycles_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cpucycles_total",
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),
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"Number of CPU cycles (frequency scaled)",
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[]string{"cpu"},
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nil,
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),
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"instructions_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"instructions_total",
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),
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"Number of CPU instructions",
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[]string{"cpu"},
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nil,
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),
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"branch_instructions_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"branch_instructions_total",
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),
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"Number of CPU branch instructions",
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[]string{"cpu"},
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nil,
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),
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"branch_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"branch_misses_total",
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),
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"Number of CPU branch misses",
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[]string{"cpu"},
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nil,
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),
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"cache_refs_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_refs_total",
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),
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"Number of cache references (non frequency scaled)",
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[]string{"cpu"},
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nil,
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),
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"cache_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_misses_total",
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),
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"Number of cache misses",
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[]string{"cpu"},
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nil,
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),
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"ref_cpucycles_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"ref_cpucycles_total",
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),
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"Number of CPU cycles",
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[]string{"cpu"},
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nil,
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),
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"page_faults_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"page_faults_total",
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),
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"Number of page faults",
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[]string{"cpu"},
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nil,
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),
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"context_switches_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"context_switches_total",
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),
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"Number of context switches",
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[]string{"cpu"},
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nil,
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),
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"cpu_migrations_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cpu_migrations_total",
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),
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"Number of CPU process migrations",
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[]string{"cpu"},
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nil,
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),
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"minor_faults_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"minor_faults_total",
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),
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"Number of minor page faults",
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[]string{"cpu"},
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nil,
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),
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"major_faults_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"major_faults_total",
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),
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"Number of major page faults",
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[]string{"cpu"},
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nil,
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),
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"cache_l1d_read_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_l1d_read_hits_total",
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),
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"Number L1 data cache read hits",
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[]string{"cpu"},
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nil,
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),
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"cache_l1d_read_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_l1d_read_misses_total",
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),
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"Number L1 data cache read misses",
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[]string{"cpu"},
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nil,
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),
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"cache_l1d_write_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_l1d_write_hits_total",
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),
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"Number L1 data cache write hits",
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[]string{"cpu"},
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nil,
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),
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"cache_l1_instr_read_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_l1_instr_read_misses_total",
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),
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"Number instruction L1 instruction read misses",
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[]string{"cpu"},
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nil,
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),
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"cache_tlb_instr_read_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_tlb_instr_read_hits_total",
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),
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"Number instruction TLB read hits",
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[]string{"cpu"},
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nil,
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),
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"cache_tlb_instr_read_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_tlb_instr_read_misses_total",
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),
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"Number instruction TLB read misses",
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[]string{"cpu"},
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nil,
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),
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"cache_ll_read_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_ll_read_hits_total",
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),
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"Number last level read hits",
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[]string{"cpu"},
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nil,
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),
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"cache_ll_read_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_ll_read_misses_total",
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),
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"Number last level read misses",
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[]string{"cpu"},
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nil,
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),
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"cache_ll_write_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_ll_write_hits_total",
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),
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"Number last level write hits",
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[]string{"cpu"},
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nil,
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),
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"cache_ll_write_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_ll_write_misses_total",
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),
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"Number last level write misses",
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[]string{"cpu"},
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nil,
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),
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"cache_bpu_read_hits_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_bpu_read_hits_total",
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),
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"Number BPU read hits",
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[]string{"cpu"},
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nil,
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),
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"cache_bpu_read_misses_total": prometheus.NewDesc(
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prometheus.BuildFQName(
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namespace,
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perfSubsystem,
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"cache_bpu_read_misses_total",
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),
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"Number BPU read misses",
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[]string{"cpu"},
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nil,
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),
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}
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return collector, nil
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}
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// Update implements the Collector interface and will collect metrics per CPU.
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func (c *perfCollector) Update(ch chan<- prometheus.Metric) error {
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if err := c.updateHardwareStats(ch); err != nil {
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return err
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}
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if err := c.updateSoftwareStats(ch); err != nil {
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return err
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}
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if err := c.updateCacheStats(ch); err != nil {
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return err
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}
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return nil
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}
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func (c *perfCollector) updateHardwareStats(ch chan<- prometheus.Metric) error {
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for cpu, profiler := range c.perfHwProfilers {
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cpuStr := fmt.Sprintf("%d", cpu)
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hwProfile, err := profiler.Profile()
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if err != nil {
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return err
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}
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if hwProfile == nil {
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continue
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}
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if hwProfile.CPUCycles != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["cpucycles_total"],
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prometheus.CounterValue, float64(*hwProfile.CPUCycles),
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cpuStr,
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)
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}
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if hwProfile.Instructions != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["instructions_total"],
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prometheus.CounterValue, float64(*hwProfile.Instructions),
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cpuStr,
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)
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}
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if hwProfile.BranchInstr != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["branch_instructions_total"],
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prometheus.CounterValue, float64(*hwProfile.BranchInstr),
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cpuStr,
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)
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}
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if hwProfile.BranchMisses != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["branch_misses_total"],
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prometheus.CounterValue, float64(*hwProfile.BranchMisses),
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cpuStr,
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)
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}
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if hwProfile.CacheRefs != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["cache_refs_total"],
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prometheus.CounterValue, float64(*hwProfile.CacheRefs),
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cpuStr,
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)
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}
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if hwProfile.CacheMisses != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["cache_misses_total"],
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prometheus.CounterValue, float64(*hwProfile.CacheMisses),
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cpuStr,
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)
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}
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if hwProfile.RefCPUCycles != nil {
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ch <- prometheus.MustNewConstMetric(
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c.desc["ref_cpucycles_total"],
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prometheus.CounterValue, float64(*hwProfile.RefCPUCycles),
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cpuStr,
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)
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}
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}
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return nil
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}
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|
|
func (c *perfCollector) updateSoftwareStats(ch chan<- prometheus.Metric) error {
|
||
|
|
for cpu, profiler := range c.perfSwProfilers {
|
||
|
|
cpuStr := fmt.Sprintf("%d", cpu)
|
||
|
|
swProfile, err := profiler.Profile()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if swProfile == nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
if swProfile.PageFaults != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["page_faults_total"],
|
||
|
|
prometheus.CounterValue, float64(*swProfile.PageFaults),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if swProfile.ContextSwitches != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["context_switches_total"],
|
||
|
|
prometheus.CounterValue, float64(*swProfile.ContextSwitches),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if swProfile.CPUMigrations != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cpu_migrations_total"],
|
||
|
|
prometheus.CounterValue, float64(*swProfile.CPUMigrations),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if swProfile.MinorPageFaults != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["minor_faults_total"],
|
||
|
|
prometheus.CounterValue, float64(*swProfile.MinorPageFaults),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if swProfile.MajorPageFaults != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["major_faults_total"],
|
||
|
|
prometheus.CounterValue, float64(*swProfile.MajorPageFaults),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *perfCollector) updateCacheStats(ch chan<- prometheus.Metric) error {
|
||
|
|
for cpu, profiler := range c.perfCacheProfilers {
|
||
|
|
cpuStr := fmt.Sprintf("%d", cpu)
|
||
|
|
cacheProfile, err := profiler.Profile()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if cacheProfile == nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.L1DataReadHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_l1d_read_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.L1DataReadHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.L1DataReadMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_l1d_read_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.L1DataReadMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.L1DataWriteHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_l1d_write_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.L1DataWriteHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.L1InstrReadMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_l1_instr_read_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.L1InstrReadMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.InstrTLBReadHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_tlb_instr_read_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.InstrTLBReadHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.InstrTLBReadMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_tlb_instr_read_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.InstrTLBReadMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.LastLevelReadHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_ll_read_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.LastLevelReadHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.LastLevelReadMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_ll_read_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.LastLevelReadMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.LastLevelWriteHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_ll_write_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.LastLevelWriteHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.LastLevelWriteMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_ll_write_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.LastLevelWriteMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.BPUReadHit != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_bpu_read_hits_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.BPUReadHit),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if cacheProfile.BPUReadMiss != nil {
|
||
|
|
ch <- prometheus.MustNewConstMetric(
|
||
|
|
c.desc["cache_bpu_read_misses_total"],
|
||
|
|
prometheus.CounterValue, float64(*cacheProfile.BPUReadMiss),
|
||
|
|
cpuStr,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|