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  1. 15 Aug, 2016 2 commits
  3. 10 Aug, 2016 1 commit
  5. 09 Aug, 2016 1 commit
  7. 08 Aug, 2016 1 commit
    • Brad Fitzpatrick's avatar
      net/http: make Transport use new connection if over HTTP/2 concurrency limit · 7a622740
      Brad Fitzpatrick authored 
      The Go HTTP/1 client will make as many new TCP connections as the user requests.

The HTTP/2 client tried to have that behavior, but the policy of
whether a connection is re-usable didn't take into account the extra 1
stream counting against SETTINGS_MAX_CONCURRENT_STREAMS so in practice
users were getting errors.

For example, if the server's advertised max concurrent streams is 100
and 200 concurrrent Go HTTP requests ask for a connection at once, all
200 will think they can reuse that TCP connection, but then 100 will
fail later when the number of concurrent streams exceeds 100.

Instead, recognize the "no cached connections" error value in the
shouldRetryRequest method, so those 100 will retry a new connection.

This is the conservative fix for Go 1.7 so users don't get errors, and
to match the HTTP/1 behavior. Issues #13957 and #13774 are the more
involved bugs for Go 1.8.

Updates #16582
Updates #13957

Change-Id: I1f15a7ce60c07a4baebca87675836d6fe03993e8
Reviewed-on: https://go-review.googlesource.com/25580
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Reviewed-by: default avatarChris Broadfoot <cbro@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
      7a622740
  9. 06 Aug, 2016 1 commit
  11. 05 Aug, 2016 4 commits
  13. 04 Aug, 2016 2 commits
    • Brad Fitzpatrick's avatar
      syscall: fix Gettimeofday on macOS Sierra · da070bed
      Brad Fitzpatrick authored 
      Fixes #16606

Change-Id: I57465061b90e901293cd8b6ef756d6aa84ebd4a3
Reviewed-on: https://go-review.googlesource.com/25495Reviewed-by: default avatarQuentin Smith <quentin@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Run-TryBot: Quentin Smith <quentin@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      da070bed
    • David Crawshaw's avatar
      runtime: initialize hash algs before typemap · f135c326
      David Crawshaw authored 
      When compiling with -buildmode=shared, a map[int32]*_type is created for
each extra module mapping duplicate types back to a canonical object.
This is done in the function typelinksinit, which is called before the
init function that sets up the hash functions for the map
implementation. The result is typemap becomes unusable after
runtime initialization.

The fix in this CL is to move algorithm init before typelinksinit in
the runtime setup process. (For 1.8, we may want to turn typemap into
a sorted slice of types and use binary search.)

Manually tested on GOOS=linux with:

	GOHOSTARCH=386 GOARCH=386 ./make.bash && \
		go install -buildmode=shared std && \
		cd ../test && \
		go run run.go -linkshared

Fixes #16590

Change-Id: Idc08c50cc70d20028276fbf564509d2cd5405210
Reviewed-on: https://go-review.googlesource.com/25469
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      f135c326
  15. 02 Aug, 2016 10 commits
  17. 29 Jul, 2016 1 commit
    • Cherry Zhang's avatar
      cmd/compile: fix possible spill of invalid pointer with DUFFZERO on AMD64 · 111d590f
      Cherry Zhang authored 
      SSA compiler on AMD64 may spill Duff-adjusted address as scalar. If
the object is on stack and the stack moves, the spilled address become
invalid.

Making the spill pointer-typed does not work. The Duff-adjusted address
points to the memory before the area to be zeroed and may be invalid.
This may cause stack scanning code panic.

Fix it by doing Duff-adjustment in genValue, so the intermediate value
is not seen by the reg allocator, and will not be spilled.

Add a test to cover both cases. As it depends on allocation, it may
be not always triggered.

Fixes #16515.

Change-Id: Ia81d60204782de7405b7046165ad063384ede0db
Reviewed-on: https://go-review.googlesource.com/25309
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Chase <drchase@google.com>
      111d590f
  19. 28 Jul, 2016 1 commit
  21. 27 Jul, 2016 2 commits
    • Rhys Hiltner's avatar
      runtime: reduce GC assist extra credit · ccca9c9c
      Rhys Hiltner authored 
      Mutator goroutines that allocate memory during the concurrent mark
phase are required to spend some time assisting the garbage
collector. The magnitude of this mandatory assistance is proportional
to the goroutine's allocation debt and subject to the assistance
ratio as calculated by the pacer.

When assisting the garbage collector, a mutator goroutine will go
beyond paying off its allocation debt. It will build up extra credit
to amortize the overhead of the assist.

In fast-allocating applications with high assist ratios, building up
this credit can take the affected goroutine's entire time slice.
Reduce the penalty on each goroutine being selected to assist the GC
in two ways, to spread the responsibility more evenly.

First, do a consistent amount of extra scan work without regard for
the pacer's assistance ratio. Second, reduce the magnitude of the
extra scan work so it can be completed within a few hundred
microseconds.

Commentary on gcOverAssistWork is by Austin Clements, originally in
https://golang.org/cl/24704

Updates #14812
Fixes #16432

Change-Id: I436f899e778c20daa314f3e9f0e2a1bbd53b43e1
Reviewed-on: https://go-review.googlesource.com/25155
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarAustin Clements <austin@google.com>
Reviewed-by: default avatarRick Hudson <rlh@golang.org>
Reviewed-by: default avatarChris Broadfoot <cbro@golang.org>
      ccca9c9c
    • Brad Fitzpatrick's avatar
      net/http: fix data race with concurrent use of Server.Serve · c80e0d37
      Brad Fitzpatrick authored 
      Fixes #16505

Change-Id: I0afabcc8b1be3a5dbee59946b0c44d4c00a28d71
Reviewed-on: https://go-review.googlesource.com/25280
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarChris Broadfoot <cbro@golang.org>
      c80e0d37
  23. 26 Jul, 2016 7 commits
  25. 25 Jul, 2016 1 commit
  27. 22 Jul, 2016 1 commit
  29. 21 Jul, 2016 5 commits
    • Chris Broadfoot's avatar
      go1.7rc3 · 8707f31c
      Chris Broadfoot authored 
      Change-Id: Iaef13003979c68926c260c415d6074a50ae137b2
Reviewed-on: https://go-review.googlesource.com/25142
Run-TryBot: Chris Broadfoot <cbro@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      8707f31c
    • Chris Broadfoot's avatar
      all: merge master into release-branch.go1.7 · 16a2af03
      Chris Broadfoot authored 
      Change-Id: I2511c3f7583887b641c9b3694aae54789fbc5342
      16a2af03
    • Brad Fitzpatrick's avatar
      misc/trace: disable trace resolution warning · 243d51f0
      Brad Fitzpatrick authored 
      It was removed in upstream Chrome https://codereview.chromium.org/2016863004

Rather than update to the latest version, make the minimal change for Go 1.7 and
change the "showToUser" boolean from true to false.

Tested by hand that it goes away after this change.

Updates #16247

Change-Id: I051f49da878e554b1a34a88e9abc70ab50e18780
Reviewed-on: https://go-review.googlesource.com/25117Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      243d51f0
    • David Chase's avatar
      cmd/compile: change phi location to be optimistic at backedges · 846bc6c5
      David Chase authored 
      This is:

(1) a simple trick that cuts the number of phi-nodes
(temporarily) inserted into the ssa representation by a factor
of 10, and can cut the user time to compile tricky inputs like
gogo/protobuf tests from 13 user minutes to 9.5, and memory
allocation from 3.4GB to 2.4GB.

(2) a fix to sparse lookup, that does not rely on
an assumption proven false by at least one pathological
input "etldlen".

These two changes fix unrelated compiler performance bugs,
both necessary to obtain good performance compiling etldlen.
Without them it takes 20 minutes or longer, with them it
completes in 2 minutes, without a gigantic memory footprint.

Updates #16407

Change-Id: Iaa8aaa8c706858b3d49de1c4865a7fd79e6f4ff7
Reviewed-on: https://go-review.googlesource.com/23136Reviewed-by: default avatarKeith Randall <khr@golang.org>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      846bc6c5
    • Keith Randall's avatar
      cmd/compile: move phi args which are constants closer to the phi · 305a0ac1
      Keith Randall authored 
      entry:
   x = MOVQconst [7]
   ...
b1:
   goto b2
b2:
   v = Phi(x, y, z)

Transform that program to:

entry:
   ...
b1:
   x = MOVQconst [7]
   goto b2
b2:
   v = Phi(x, y, z)

This CL moves constant-generating instructions used by a phi to the
appropriate immediate predecessor of the phi's block.

We used to put all constants in the entry block.  Unfortunately, in
large functions we have lots of constants at the start of the
function, all of which are used by lots of phis throughout the
function.  This leads to the constants being live through most of the
function (especially if there is an outer loop).  That's an O(n^2)
problem.

Note that most of the non-phi uses of constants have already been
folded into instructions (ADDQconst, MOVQstoreconst, etc.).

This CL may be generally useful for other instances of compiler
slowness, I'll have to check.  It may cause some programs to run
slower, but probably not by much, as rematerializeable values like
these constants are allocated late (not at their originally scheduled
location) anyway.

This CL is definitely a minimal change that can be considered for 1.7.
We probably want to do a better job in the tighten pass generally, not
just for phi args.  Leaving that for 1.8.

Update #16407

Change-Id: If112a8883b4ef172b2f37dea13e44bda9346c342
Reviewed-on: https://go-review.googlesource.com/25046
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarJosh Bleecher Snyder <josharian@gmail.com>
      305a0ac1
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