"os"
"regexp"
"runtime"
+ "runtime/pprof"
"strings"
"sync"
"sync/atomic"
}
func (s *CollectionFSSuite) TestFlushFullBlocksWritingLongFile(c *check.C) {
- defer func(wab, mbs int) {
- writeAheadBlocks = wab
+ defer func(cw, mbs int) {
+ concurrentWriters = cw
maxBlockSize = mbs
- }(writeAheadBlocks, maxBlockSize)
- writeAheadBlocks = 2
+ }(concurrentWriters, maxBlockSize)
+ concurrentWriters = 2
maxBlockSize = 1024
proceed := make(chan struct{})
default:
time.Sleep(time.Millisecond)
}
- c.Check(atomic.AddInt32(&concurrent, -1) < int32(writeAheadBlocks), check.Equals, true)
+ c.Check(atomic.AddInt32(&concurrent, -1) < int32(concurrentWriters), check.Equals, true)
}
fs, err := (&Collection{}).FileSystem(s.client, s.kc)
}
if i%8 == 0 {
- fs.Flush(true)
+ fs.Flush("", true)
}
size := fs.memorySize()
atomic.AddInt64(&flushed, int64(len(p)))
}
- nDirs := 8
+ nDirs := int64(8)
megabyte := make([]byte, 1<<20)
- for i := 0; i < nDirs; i++ {
+ for i := int64(0); i < nDirs; i++ {
dir := fmt.Sprintf("dir%d", i)
fs.Mkdir(dir, 0755)
for j := 0; j < 67; j++ {
c.Check(fs.memorySize(), check.Equals, int64(nDirs*67<<20))
c.Check(flushed, check.Equals, int64(0))
- fs.Flush(false)
- expectSize := int64(nDirs * 3 << 20)
+ waitForFlush := func(expectUnflushed, expectFlushed int64) {
+ for deadline := time.Now().Add(5 * time.Second); fs.memorySize() > expectUnflushed && time.Now().Before(deadline); time.Sleep(10 * time.Millisecond) {
+ }
+ c.Check(fs.memorySize(), check.Equals, expectUnflushed)
+ c.Check(flushed, check.Equals, expectFlushed)
+ }
+
+ // Nothing flushed yet
+ waitForFlush((nDirs*67)<<20, 0)
+
+ // Flushing a non-empty dir "/" is non-recursive and there are
+ // no top-level files, so this has no effect
+ fs.Flush("/", false)
+ waitForFlush((nDirs*67)<<20, 0)
+
+ // Flush the full block in dir0
+ fs.Flush("dir0", false)
+ waitForFlush((nDirs*67-64)<<20, 64<<20)
+
+ err = fs.Flush("dir-does-not-exist", false)
+ c.Check(err, check.NotNil)
+
+ // Flush full blocks in all dirs
+ fs.Flush("", false)
+ waitForFlush(nDirs*3<<20, nDirs*64<<20)
+
+ // Flush non-full blocks, too
+ fs.Flush("", true)
+ waitForFlush(0, nDirs*67<<20)
+}
+
+// Even when writing lots of files/dirs from different goroutines, as
+// long as Flush(dir,false) is called after writing each file,
+// unflushed data should be limited to one full block per
+// concurrentWriter, plus one nearly-full block at the end of each
+// dir/stream.
+func (s *CollectionFSSuite) TestMaxUnflushed(c *check.C) {
+ nDirs := int64(8)
+ maxUnflushed := (int64(concurrentWriters) + nDirs) << 26
+
+ fs, err := (&Collection{}).FileSystem(s.client, s.kc)
+ c.Assert(err, check.IsNil)
+
+ release := make(chan struct{})
+ timeout := make(chan struct{})
+ time.AfterFunc(10*time.Second, func() { close(timeout) })
+ var putCount, concurrency int64
+ var unflushed int64
+ s.kc.onPut = func(p []byte) {
+ defer atomic.AddInt64(&unflushed, -int64(len(p)))
+ cur := atomic.AddInt64(&concurrency, 1)
+ defer atomic.AddInt64(&concurrency, -1)
+ pc := atomic.AddInt64(&putCount, 1)
+ if pc < int64(concurrentWriters) {
+ // Block until we reach concurrentWriters, to
+ // make sure we're really accepting concurrent
+ // writes.
+ select {
+ case <-release:
+ case <-timeout:
+ c.Error("timeout")
+ }
+ } else if pc == int64(concurrentWriters) {
+ // Unblock the first N-1 PUT reqs.
+ close(release)
+ }
+ c.Assert(cur <= int64(concurrentWriters), check.Equals, true)
+ c.Assert(atomic.LoadInt64(&unflushed) <= maxUnflushed, check.Equals, true)
+ }
+
+ var owg sync.WaitGroup
+ megabyte := make([]byte, 1<<20)
+ for i := int64(0); i < nDirs; i++ {
+ dir := fmt.Sprintf("dir%d", i)
+ fs.Mkdir(dir, 0755)
+ owg.Add(1)
+ go func() {
+ defer owg.Done()
+ defer fs.Flush(dir, true)
+ var iwg sync.WaitGroup
+ defer iwg.Wait()
+ for j := 0; j < 67; j++ {
+ iwg.Add(1)
+ go func(j int) {
+ defer iwg.Done()
+ f, err := fs.OpenFile(fmt.Sprintf("%s/file%d", dir, j), os.O_WRONLY|os.O_CREATE, 0)
+ c.Assert(err, check.IsNil)
+ defer f.Close()
+ n, err := f.Write(megabyte)
+ c.Assert(err, check.IsNil)
+ atomic.AddInt64(&unflushed, int64(n))
+ fs.Flush(dir, false)
+ }(j)
+ }
+ }()
+ }
+ owg.Wait()
+ fs.Flush("", true)
+}
+
+func (s *CollectionFSSuite) TestFlushStress(c *check.C) {
+ done := false
+ defer func() { done = true }()
+ time.AfterFunc(10*time.Second, func() {
+ if !done {
+ pprof.Lookup("goroutine").WriteTo(os.Stderr, 1)
+ panic("timeout")
+ }
+ })
+
+ wrote := 0
+ s.kc.onPut = func(p []byte) {
+ s.kc.Lock()
+ s.kc.blocks = map[string][]byte{}
+ wrote++
+ defer c.Logf("wrote block %d, %d bytes", wrote, len(p))
+ s.kc.Unlock()
+ time.Sleep(20 * time.Millisecond)
+ }
+
+ fs, err := (&Collection{}).FileSystem(s.client, s.kc)
+ c.Assert(err, check.IsNil)
+
+ data := make([]byte, 1<<20)
+ for i := 0; i < 3; i++ {
+ dir := fmt.Sprintf("dir%d", i)
+ fs.Mkdir(dir, 0755)
+ for j := 0; j < 200; j++ {
+ data[0] = byte(j)
+ f, err := fs.OpenFile(fmt.Sprintf("%s/file%d", dir, j), os.O_WRONLY|os.O_CREATE, 0)
+ c.Assert(err, check.IsNil)
+ _, err = f.Write(data)
+ c.Assert(err, check.IsNil)
+ f.Close()
+ fs.Flush(dir, false)
+ }
+ _, err := fs.MarshalManifest(".")
+ c.Check(err, check.IsNil)
+ }
+}
- // Wait for flush to finish
- for deadline := time.Now().Add(5 * time.Second); fs.memorySize() > expectSize && time.Now().Before(deadline); time.Sleep(10 * time.Millisecond) {
+func (s *CollectionFSSuite) TestFlushShort(c *check.C) {
+ s.kc.onPut = func([]byte) {
+ s.kc.Lock()
+ s.kc.blocks = map[string][]byte{}
+ s.kc.Unlock()
+ }
+ fs, err := (&Collection{}).FileSystem(s.client, s.kc)
+ c.Assert(err, check.IsNil)
+ for _, blocksize := range []int{8, 1000000} {
+ dir := fmt.Sprintf("dir%d", blocksize)
+ err = fs.Mkdir(dir, 0755)
+ c.Assert(err, check.IsNil)
+ data := make([]byte, blocksize)
+ for i := 0; i < 100; i++ {
+ f, err := fs.OpenFile(fmt.Sprintf("%s/file%d", dir, i), os.O_WRONLY|os.O_CREATE, 0)
+ c.Assert(err, check.IsNil)
+ _, err = f.Write(data)
+ c.Assert(err, check.IsNil)
+ f.Close()
+ fs.Flush(dir, false)
+ }
+ fs.Flush(dir, true)
+ _, err := fs.MarshalManifest(".")
+ c.Check(err, check.IsNil)
}
- c.Check(fs.memorySize(), check.Equals, expectSize)
- c.Check(flushed, check.Equals, int64(nDirs*64<<20))
}
func (s *CollectionFSSuite) TestBrokenManifests(c *check.C) {
projects / arvados.git / blobdiff