d2e11efba2
As of the 4.7 kernel, the cpustats field returned from libcontainer contains values for every possible cpu (including nonexistent ones). The extra values are all 0s. If we assume that hotplug events won't happen, we can get a more accurage cpu count by using runtime.NumCPU and then ignoring any values beyond that.
137 lines
3.1 KiB
Go
137 lines
3.1 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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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 libcontainer
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import (
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"os"
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"testing"
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info "github.com/google/cadvisor/info/v1"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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"github.com/opencontainers/runc/libcontainer/system"
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)
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func TestScanInterfaceStats(t *testing.T) {
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stats, err := scanInterfaceStats("testdata/procnetdev")
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if err != nil {
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t.Error(err)
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}
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var netdevstats = []info.InterfaceStats{
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{
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Name: "wlp4s0",
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RxBytes: 1,
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RxPackets: 2,
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RxErrors: 3,
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RxDropped: 4,
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TxBytes: 9,
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TxPackets: 10,
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TxErrors: 11,
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TxDropped: 12,
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},
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{
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Name: "em1",
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RxBytes: 315849,
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RxPackets: 1172,
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RxErrors: 0,
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RxDropped: 0,
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TxBytes: 315850,
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TxPackets: 1173,
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TxErrors: 0,
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TxDropped: 0,
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},
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}
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if len(stats) != len(netdevstats) {
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t.Errorf("Expected 2 net stats, got %d", len(stats))
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}
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for i, v := range netdevstats {
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if v != stats[i] {
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t.Errorf("Expected %#v, got %#v", v, stats[i])
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}
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}
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}
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func TestScanUDPStats(t *testing.T) {
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udpStatsFile := "testdata/procnetudp"
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r, err := os.Open(udpStatsFile)
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if err != nil {
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t.Errorf("failure opening %s: %v", udpStatsFile, err)
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}
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stats, err := scanUdpStats(r)
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if err != nil {
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t.Error(err)
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}
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var udpstats = info.UdpStat{
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Listen: 2,
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Dropped: 4,
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RxQueued: 10,
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TxQueued: 11,
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}
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if stats != udpstats {
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t.Errorf("Expected %#v, got %#v", udpstats, stats)
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}
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}
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// https://github.com/docker/libcontainer/blob/v2.2.1/cgroups/fs/cpuacct.go#L19
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const nanosecondsInSeconds = 1000000000
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var clockTicks = uint64(system.GetClockTicks())
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func TestMorePossibleCPUs(t *testing.T) {
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realNumCPUs := uint32(8)
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numCpusFunc = func() (uint32, error) {
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return realNumCPUs, nil
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}
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possibleCPUs := uint32(31)
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perCpuUsage := make([]uint64, possibleCPUs)
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for i := uint32(0); i < realNumCPUs; i++ {
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perCpuUsage[i] = 8562955455524
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}
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s := &cgroups.Stats{
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CpuStats: cgroups.CpuStats{
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CpuUsage: cgroups.CpuUsage{
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PercpuUsage: perCpuUsage,
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TotalUsage: 33802947350272,
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UsageInKernelmode: 734746 * nanosecondsInSeconds / clockTicks,
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UsageInUsermode: 2767637 * nanosecondsInSeconds / clockTicks,
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},
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},
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}
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var ret info.ContainerStats
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setCpuStats(s, &ret)
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expected := info.ContainerStats{
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Cpu: info.CpuStats{
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Usage: info.CpuUsage{
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PerCpu: perCpuUsage[0:realNumCPUs],
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User: s.CpuStats.CpuUsage.UsageInUsermode,
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System: s.CpuStats.CpuUsage.UsageInKernelmode,
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Total: 8562955455524 * uint64(realNumCPUs),
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},
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},
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}
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if !ret.Eq(&expected) {
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t.Fatalf("expected %+v == %+v", ret, expected)
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}
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}
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