diff options
| -rw-r--r-- | extras/hs-test/cpu.go | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/extras/hs-test/cpu.go b/extras/hs-test/cpu.go index 9a034ed2096..a976f47d8a5 100644 --- a/extras/hs-test/cpu.go +++ b/extras/hs-test/cpu.go @@ -2,11 +2,14 @@ package main import ( "bufio" + "errors" "fmt" "os" + "os/exec" + "strings" ) -var CPU_PATH = "/sys/fs/cgroup/cpuset.cpus.effective" +var CgroupPath = "/sys/fs/cgroup/" type CpuContext struct { cpuAllocator *CpuAllocatorT @@ -38,7 +41,25 @@ func (c *CpuAllocatorT) Allocate(nCpus int) (*CpuContext, error) { func (c *CpuAllocatorT) readCpus() error { var first, last int - file, err := os.Open(CPU_PATH) + + // Path depends on cgroup version. We need to check which version is in use. + // For that following command can be used: 'stat -fc %T /sys/fs/cgroup/' + // In case the output states 'cgroup2fs' then cgroups v2 is used, 'tmpfs' in case cgroups v1. + cmd := exec.Command("stat", "-fc", "%T", "/sys/fs/cgroup/") + byteOutput, err := cmd.CombinedOutput() + if err != nil { + return err + } + CpuPath := CgroupPath + if strings.Contains(string(byteOutput), "tmpfs") { + CpuPath += "cpuset/cpuset.effective_cpus" + } else if strings.Contains(string(byteOutput), "cgroup2fs") { + CpuPath += "cpuset.cpus.effective" + } else { + return errors.New("cgroup unknown fs: " + string(byteOutput)) + } + + file, err := os.Open(CpuPath) if err != nil { return err } |