mirror of
https://github.com/opencontainers/runc.git
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Stavros Panakakis
1be06760ed
Initially, this was a commit to switch from strings.Fields to strings.SplitN in getCpuUsageBreakdown, since strings.Fields was probably slower than strings.SplitN in some old Go versions. Afterwards, strings.Cut was also considered for potential speed improvements. After writing a benchmark test, we learned that: - strings.Fields performance is now adequate; - strings.SplitN is slower than strings.Fields; - strings.Cut had <5% performance gain from strings.Fields; So, remove the TODO and keep the benchmark test. Signed-off-by: Stavros Panakakis <stavrospanakakis@gmail.com>
40 lines
885 B
Go
40 lines
885 B
Go
/*
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Utility for testing cgroup operations.
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Creates a mock of the cgroup filesystem for the duration of the test.
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*/
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package fs
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import (
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"os"
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"path/filepath"
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"testing"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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)
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func init() {
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cgroups.TestMode = true
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}
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// tempDir creates a new test directory for the specified subsystem.
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func tempDir(t testing.TB, subsystem string) string {
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path := filepath.Join(t.TempDir(), subsystem)
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// Ensure the full mock cgroup path exists.
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if err := os.Mkdir(path, 0o755); err != nil {
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t.Fatal(err)
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}
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return path
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}
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// writeFileContents writes the specified contents on the mock of the specified
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// cgroup files.
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func writeFileContents(t testing.TB, path string, fileContents map[string]string) {
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for file, contents := range fileContents {
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err := cgroups.WriteFile(path, file, contents)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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