PosixTest.MkdirInParallel
parent
b82157437e
commit
2b71f8cbe8
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@ -30,6 +30,7 @@ import (
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"golang.org/x/net/context"
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"github.com/jacobsa/fuse/fusetesting"
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"github.com/jacobsa/gcloud/syncutil"
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. "github.com/jacobsa/oglematchers"
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. "github.com/jacobsa/ogletest"
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@ -268,6 +269,60 @@ func runCreateInParallelTest_Exclusive(
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}
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}
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func runMkdirInParallelTest(
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ctx context.Context,
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dir string) {
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// Ensure that we get parallelism for this test.
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defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(runtime.NumCPU()))
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// Try for awhile to see if anything breaks.
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const duration = 500 * time.Millisecond
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startTime := time.Now()
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for time.Since(startTime) < duration {
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filename := path.Join(dir, "foo")
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// Set up a function that creates the directory, ignoring EEXIST errors.
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worker := func(id byte) (err error) {
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err = os.Mkdir(filename, 0700)
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if os.IsExist(err) {
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err = nil
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}
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if err != nil {
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err = fmt.Errorf("Worker %d: Mkdir: %v", id, err)
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return
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}
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return
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}
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// Run several workers in parallel.
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const numWorkers = 16
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b := syncutil.NewBundle(ctx)
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for i := 0; i < numWorkers; i++ {
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id := byte(i)
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b.Add(func(ctx context.Context) (err error) {
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err = worker(id)
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return
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})
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}
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err := b.Join()
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AssertEq(nil, err)
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// The directory should have been created, once.
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entries, err := fusetesting.ReadDirPicky(dir)
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AssertEq(nil, err)
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AssertEq(1, len(entries))
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AssertEq("foo", entries[0].Name())
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// Delete the directory.
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err = os.Remove(filename)
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AssertEq(nil, err)
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Boilerplate
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////////////////////////////////////////////////////////////////////////
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@ -661,3 +716,7 @@ func (t *PosixTest) CreateInParallel_Truncate() {
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func (t *PosixTest) CreateInParallel_Exclusive() {
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runCreateInParallelTest_Exclusive(t.ctx, t.dir)
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}
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func (t *PosixTest) MkdirInParallel() {
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runMkdirInParallelTest(t.ctx, t.dir)
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}
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