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archive, cio, cmd, linux: use buffer pools

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To avoid buffer bloat in long running processes, we try to use buffer
pools where possible. This is meant to address shim memory usage issues,
but may not be the root cause.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2018-01-19 17:28:01 -08:00
parent aaf930eaf9
commit cd72819b53
14 changed files with 105 additions and 39 deletions
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15
cio/io_unix.go
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@@ -47,7 +47,10 @@ func copyIO(fifos *FIFOSet, ioset *Streams) (*cio, error) {
if fifos.Stdin != "" {
go func() {
io.Copy(pipes.Stdin, ioset.Stdin)
p := bufPool.Get().(*[]byte)
defer bufPool.Put(p)
io.CopyBuffer(pipes.Stdin, ioset.Stdin, *p)
pipes.Stdin.Close()
}()
}
@@ -55,7 +58,10 @@ func copyIO(fifos *FIFOSet, ioset *Streams) (*cio, error) {
var wg = &sync.WaitGroup{}
wg.Add(1)
go func() {
io.Copy(ioset.Stdout, pipes.Stdout)
p := bufPool.Get().(*[]byte)
defer bufPool.Put(p)
io.CopyBuffer(ioset.Stdout, pipes.Stdout, *p)
pipes.Stdout.Close()
wg.Done()
}()
@@ -63,7 +69,10 @@ func copyIO(fifos *FIFOSet, ioset *Streams) (*cio, error) {
if !fifos.Terminal {
wg.Add(1)
go func() {
io.Copy(ioset.Stderr, pipes.Stderr)
p := bufPool.Get().(*[]byte)
defer bufPool.Put(p)
io.CopyBuffer(ioset.Stderr, pipes.Stderr, *p)
pipes.Stderr.Close()
wg.Done()
}()