delta/go-git.git/src/internal, branch dev.debug

internal/poll: don't wait for unpollable files

2017-07-14T04:03:31+00:00

If we get an EAGAIN error on an unpollable file, don't try to wait for
it to be ready; just return EAGAIN.

It's possible that we should instead ensure that when Stdin is a pipe
in non-blocking mode, we wait for data to appear. For now take the
conservative approach of doing what we did in previous releases.

Based on https://golang.org/cl/47555 by Totoro W.

Fixes #20915

Change-Id: Icc9e97a5a877b0a3583ec056c35412d1afab62d1
Reviewed-on: https://go-review.googlesource.com/48490
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

net: fix sendfile for Solaris

2017-06-30T19:07:13+00:00

If a retryable error such as EAGAIN/EINTR is encountered during a call
to sendfile(), we should not assume that a partial write occurred.
Instead, just like any other platform, we should always try again even
if 0 bytes were written.

Fixes #20857

Change-Id: I9aa48d193c27c6794c550320da4d3f7544041f37
Reviewed-on: https://go-review.googlesource.com/47351
Run-TryBot: Shawn Walker-Salas 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

internal/poll: implement RawControl of FD on Windows

2017-05-20T00:45:11+00:00

This is a followup to https://go-review.googlesource.com/37038.

Updates #19435.

Change-Id: If3d56bca0e8816d1a169f5cf97f27b20695a9955
Reviewed-on: https://go-review.googlesource.com/43692
Reviewed-by: Brad Fitzpatrick 
Reviewed-by: Ian Lance Taylor

internal/poll: add RawControl, RawRead and RawWrite methods to FD

2017-05-19T09:10:16+00:00

This change adds RawControl, RawRead and RawWrite methods to type FD
to make the runtime-integrated network poller work together with a
user-defined function. The methods are used via the net package from
external packages and type FD is considered as an implementation of
syscall.Conn and syscall.RawConn interfaces.

Updates #19435.

Change-Id: I4ad04b10ffddb2b54fa8d70587440960d73c0a2d
Reviewed-on: https://go-review.googlesource.com/37038
Run-TryBot: Mikio Hara 
TryBot-Result: Gobot Gobot 
Reviewed-by: Ian Lance Taylor

internal/poll: remove unused ioSrv.ExecIO parameter

2017-05-19T07:14:25+00:00

Change-Id: If5cb80c3c086684ce6c2e8ed9bb23b2a20c8aacd
Reviewed-on: https://go-review.googlesource.com/43690
Reviewed-by: Mikio Hara 
Run-TryBot: Alex Brainman 
TryBot-Result: Gobot Gobot

internal/cpu: new package to detect cpu features

2017-05-10T17:02:21+00:00

Implements detection of x86 cpu features that
are used in the go standard library.

Changes all standard library packages to use the new cpu package
instead of using runtime internal variables to check x86 cpu features.

Updates: #15403

Change-Id: I2999a10cb4d9ec4863ffbed72f4e021a1dbc4bb9
Reviewed-on: https://go-review.googlesource.com/41476
Reviewed-by: Brad Fitzpatrick 
Reviewed-by: Keith Randall 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot

internal/poll: remove allocation in windows FD.Writev

2017-05-08T01:50:49+00:00

Use closure parameter instead of external variable to
remove 1 allocation.

I tried to add test, but it is difficult to add something simple
and not flake here. I did test this with:

diff --git a/src/net/writev_test.go b/src/net/writev_test.go
index 4c05be4..e417d68 100644
--- a/src/net/writev_test.go
+++ b/src/net/writev_test.go
@@ -99,6 +99,15 @@ func TestBuffers_WriteTo(t *testing.T) {
 	}
 }

+func TestBuffers_WriteToAllocs(t *testing.T) {
+	allocs := testing.AllocsPerRun(10, func() {
+		testBuffer_writeTo(t, 10, false)
+	})
+	if allocs > 0 {
+		t.Fatalf("got %v; want 0", allocs)
+	}
+}
+
 func testBuffer_writeTo(t *testing.T, chunks int, useCopy bool) {
 	oldHook := poll.TestHookDidWritev
 	defer func() { poll.TestHookDidWritev = oldHook }()

It makes allocation count go down by 1 after the fix.

Before:

C:\>u:\test -test.v -test.run=WriteToAllocs
=== RUN   TestBuffers_WriteToAllocs
--- FAIL: TestBuffers_WriteToAllocs (0.05s)
        writev_test.go:107: got 66; want 0
FAIL

and after:

C:\>u:\test -test.v -test.run=WriteToAllocs
=== RUN   TestBuffers_WriteToAllocs
--- FAIL: TestBuffers_WriteToAllocs (0.04s)
        writev_test.go:107: got 65; want 0
FAIL

Thanks to @MichaelMonashev for report and the fix.

Fixes #19222

Change-Id: I0f73cd9e2c8bbaa0653083f81f3ccb83b5ea84e1
Reviewed-on: https://go-review.googlesource.com/42893
Reviewed-by: Brad Fitzpatrick 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot

os, net, internal/poll: return consistent error for closed socket

2017-04-26T00:03:14+00:00

In the past we returned "use of closed network connection" when using
a closed network descriptor in some way. In CL 36799 that was changed
to return "use of closed file or network connection". Because programs
have no access to a value of this error type (see issue #4373) they
resort to doing direct string comparisons (see issue #19252). This CL
restores the old error string so that we don't break programs
unnecessarily with the 1.9 release.

This adds a test to the net package for the expected string.

For symmetry check that the os package returns the expected error,
which for os already exists as os.ErrClosed.

Updates #4373.
Fixed #19252.

Change-Id: I5b83fd12cfa03501a077cad9336499b819f4a38b
Reviewed-on: https://go-review.googlesource.com/39997
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
Reviewed-by: Russ Cox

internal/poll: don't use r/w lock for Pread/Pwrite

2017-04-25T04:29:39+00:00

Since Pread/Pwrite specify a file offset, using incref is sufficient.
This permits multiple Pread/Pwrite calls in parallel.

Since Pread/Pwrite specify a file offset, it doesn't seem to make
sense to use the poller for them, so don't.

Updates #19586

Change-Id: I676be16bf519b9a45f8e6b1d991c44f10848bc11
Reviewed-on: https://go-review.googlesource.com/41670
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick

runtime: record swept and reclaimed bytes in sweep trace

2017-04-19T18:31:14+00:00

This extends the GCSweepDone event with counts of swept and reclaimed
bytes. These are useful for understanding the duration and
effectiveness of sweep events.

Change-Id: I3c97a4f0f3aad3adbd188adb264859775f54e2df
Reviewed-on: https://go-review.googlesource.com/40811
Run-TryBot: Austin Clements 
TryBot-Result: Gobot Gobot 
Reviewed-by: Hyang-Ah Hana Kim