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  1. 13 Sep, 2016 11 commits
    • Michael Munday's avatar
      cmd/compile: add SSA backend for s390x and enable by default · 6ec993ad
      Michael Munday authored 
      The new SSA backend modifies the ABI slightly: R0 is now a usable
general purpose register.

Fixes #16677.

Change-Id: I367435ce921e0c7e79e021c80cf8ef5d1d1466cf
Reviewed-on: https://go-review.googlesource.com/28978
Run-TryBot: Michael Munday <munday@ca.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      6ec993ad
    • Brad Fitzpatrick's avatar
      net/http: make Transport support international domain names · b7e53038
      Brad Fitzpatrick authored 
      This CL makes code like this work:

     res, err := http.Get("https://фу.бар/баз")

So far, IDNA support is limited to the http1 and http2 Transports.
The http package is currently responsible for converting domain names
into Punycode before calling the net layer. The http package also has
to Punycode-ify the hostname for the Host & :authority headers for
HTTP/1 and HTTP/2, respectively.

No automatic translation from Punycode back to Unicode is performed,
per Go's historical behavior. Docs are updated where relevant.  No
changes needed to the Server package. Things are already in ASCII
at that point.

No changes to the net package, at least yet.

Updates x/net/http2 to git rev 57c7820 for https://golang.org/cl/29071

Updates #13835

Change-Id: I1e9a74c60d00a197ea951a9505da5c3c3187099b
Reviewed-on: https://go-review.googlesource.com/29072Reviewed-by: default avatarChris Broadfoot <cbro@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      b7e53038
    • Brad Fitzpatrick's avatar
      net/http: update bundled x/net/http2 · 802cb592
      Brad Fitzpatrick authored 
      Updates x/net/http2 (and x/net/lex/httplex) to git rev 749a502 for:

   http2: don't sniff first Request.Body byte in Transport until we have a conn
   https://golang.org/cl/29074
   Fixes #17071

   http2: add Transport support for unicode domain names
   https://golang.org/cl/29071
   Updates #13835

   http2: don't send bogus :path pseudo headers if Request.URL.Opaque is set
   https://golang.org/cl/27632
     +
   http2: fix bug where '*' as a valid :path value in Transport
   https://golang.org/cl/29070
   Updates #16847

   http2: fix all vet warnings
   https://golang.org/cl/28344
   Updates #16228
   Updates #11041

Also uses the new -underscore flag to x/tools/cmd/bundle from
https://golang.org/cl/29086

Change-Id: Ica0f6bf6e33266237e37527a166a783d78c059c4
Reviewed-on: https://go-review.googlesource.com/29110
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarChris Broadfoot <cbro@golang.org>
      802cb592
    • Josh Bleecher Snyder's avatar
      runtime: limit the number of map overflow buckets · 9980b70c
      Josh Bleecher Snyder authored 
      Consider repeatedly adding many items to a map
and then deleting them all, as in #16070. The map
itself doesn't need to grow above the high water
mark of number of items. However, due to random
collisions, the map can accumulate overflow
buckets.

Prior to this CL, those overflow buckets were
never removed, which led to a slow memory leak.

The problem with removing overflow buckets is
iterators. The obvious approach is to repack
keys and values and eliminate unused overflow
buckets. However, keys, values, and overflow
buckets cannot be manipulated without disrupting
iterators.

This CL takes a different approach, which is to
reuse the existing map growth mechanism,
which is well established, well tested, and
safe in the presence of iterators.
When a map has accumulated enough overflow buckets
we trigger map growth, but grow into a map of the
same size as before. The old overflow buckets will
be left behind for garbage collection.

For the code in #16070, instead of climbing
(very slowly) forever, memory usage now cycles
between 264mb and 483mb every 15 minutes or so.

To avoid increasing the size of maps,
the overflow bucket counter is only 16 bits.
For large maps, the counter is incremented
stochastically.

Fixes #16070

Change-Id: If551d77613ec6836907efca58bda3deee304297e
Reviewed-on: https://go-review.googlesource.com/25049
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      9980b70c
    • Robert Griesemer's avatar
      cmd/compile: reduce allocs some more · 0cd3ecb0
      Robert Griesemer authored 
      Also: update fmt_test.go.

Together with the previous commits, we are now at or below c85b77c2
levels in terms of allocation for the benchmark described in #16897
(old = c85b77c2, new = this commit):

name       old time/op     new time/op     delta
Template       297ms ± 5%      284ms ± 3%  -4.53%  (p=0.000 n=27+29)
Unicode        159ms ± 5%      151ms ± 5%  -4.91%  (p=0.000 n=28+30)
GoTypes        985ms ± 5%      935ms ± 2%  -5.13%  (p=0.000 n=28+29)

name       old alloc/op    new alloc/op    delta
Template      46.8MB ± 0%     45.7MB ± 0%  -2.37%  (p=0.000 n=30+30)
Unicode       37.8MB ± 0%     37.9MB ± 0%  +0.29%  (p=0.000 n=29+30)
GoTypes        143MB ± 0%      138MB ± 0%  -3.64%  (p=0.000 n=29+30)

name       old allocs/op   new allocs/op   delta
Template        444k ± 0%       440k ± 0%  -0.94%  (p=0.000 n=30+30)
Unicode         369k ± 0%       369k ± 0%  +0.19%  (p=0.000 n=29+30)
GoTypes        1.35M ± 0%      1.34M ± 0%  -1.24%  (p=0.000 n=30+30)

For #16897.

Change-Id: Iedbeb408e2f1e68dd4a3201bf8813c8066ebf7ed
Reviewed-on: https://go-review.googlesource.com/29089Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      0cd3ecb0
    • Lynn Boger's avatar
      cmd/asm: ppc64le support for ISEL for use by SSA · b6946fb1
      Lynn Boger authored 
      This adds the support for the ppc64le isel instruction so
it can be used by SSA.

Fixed #16771

Change-Id: Ia2517f0834ff5e7ad927e218b84493e0106ab4a7
Reviewed-on: https://go-review.googlesource.com/28611Reviewed-by: default avatarDavid Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      b6946fb1
    • Paul Borman's avatar
      text/template: improve lexer performance in finding left delimiters. · 07b80113
      Paul Borman authored 
      The existing implementation calls l.next for each run up to the next
instance of the left delimiter ({{).  For ascii text, this is multiple
function calls per byte.  Change to use strings.Index to find the left
delimiter.  The performace improvement ranges from 1:1 (no text outside
of {{}}'s) to multiple times faster (9:1 was seen on 8K of text with no
{{ }}'s).

Change-Id: I2f82bea63b78b6714f09a725f7b2bbb00a3448a3
Reviewed-on: https://go-review.googlesource.com/24863Reviewed-by: default avatarRob Pike <r@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
      07b80113
    • Michael Hudson-Doyle's avatar
      cmd/link: fix -buildmode=pie / -linkshared combination · 8f9671d1
      Michael Hudson-Doyle authored 
      main.main and main.init were not being marked as reachable.

Fixes #17076

Change-Id: Ib3e29bd35ba6252962e6ba89173ca321ed6849b9
Reviewed-on: https://go-review.googlesource.com/28996Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      8f9671d1
    • Cherry Zhang's avatar
      cmd/compile, runtime/internal/atomic: intrinsify And8, Or8 on ARM64 · 38d35e71
      Cherry Zhang authored 
      Also add assembly implementation, in case intrinsics is disabled.

Change-Id: Iff0a8a8ce326651bd29f6c403f5ec08dd3629993
Reviewed-on: https://go-review.googlesource.com/28979
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      38d35e71
    • Robert Griesemer's avatar
      cmd/compile: remove another bytes.Buffer use in fmt.go · 09686a58
      Robert Griesemer authored 
      Missed in prior commit.

Change-Id: Ib3a41fb4e4d41feeb28c316fe70a329c73e72379
Reviewed-on: https://go-review.googlesource.com/29088
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      09686a58
    • Robert Griesemer's avatar
      cmd/compile: reduce allocs to c85b77c2 (pre-fmt.go change) levels · 37d452c3
      Robert Griesemer authored 
      Linker and reflect info generation (reflect.go) relies on formatting
of types (tconv). The fmt.Format based approach introduces extra
allocations, which matter in those cases. Resurrected sconv and tconv
code from commit c85b77c2 (fmt.go only); and adjusted it slightly.
The formatter-based approach is still used throughout the rest of the
compiler, but reflect.go now uses the tconv method that simply returns
the desired string.

(The timing data below may not be accurate; I've included it only for
comparison with the numbers in issue #16897).

name       old time/op     new time/op     delta
Template       297ms ± 2%      288ms ± 3%  -3.12%        (p=0.000 n=27+29)
Unicode        155ms ± 5%      150ms ± 5%  -3.26%        (p=0.000 n=30+30)
GoTypes        1.00s ± 3%      0.95s ± 3%  -4.51%        (p=0.000 n=28+29)

name       old alloc/op    new alloc/op    delta
Template      46.8MB ± 0%     46.5MB ± 0%  -0.65%        (p=0.000 n=28+30)
Unicode       37.9MB ± 0%     37.8MB ± 0%  -0.24%        (p=0.000 n=29+30)
GoTypes        144MB ± 0%      143MB ± 0%  -0.68%        (p=0.000 n=30+30)

name       old allocs/op   new allocs/op   delta
Template        469k ± 0%       446k ± 0%  -5.01%        (p=0.000 n=29+30)
Unicode         375k ± 0%       369k ± 0%  -1.62%        (p=0.000 n=30+28)
GoTypes        1.47M ± 0%      1.37M ± 0%  -6.29%        (p=0.000 n=30+30)

The code for sconv/tconv in fmt.go now closely match the code from c85b77c2
again; except that the functions are now methods. Removing the use of
the bytes.Buffer in tconv and special-caseing interface{} has helped a
small amount as well:

name       old time/op     new time/op     delta
Template       299ms ± 3%      288ms ± 3%  -3.83%        (p=0.000 n=29+29)
Unicode        156ms ± 5%      150ms ± 5%  -3.56%        (p=0.000 n=30+30)
GoTypes        960ms ± 2%      954ms ± 3%  -0.58%        (p=0.037 n=26+29)

name       old alloc/op    new alloc/op    delta
Template      46.6MB ± 0%     46.5MB ± 0%  -0.22%        (p=0.000 n=30+30)
Unicode       37.8MB ± 0%     37.8MB ± 0%    ~           (p=0.075 n=30+30)
GoTypes        143MB ± 0%      143MB ± 0%  -0.31%        (p=0.000 n=30+30)

name       old allocs/op   new allocs/op   delta
Template        447k ± 0%       446k ± 0%  -0.28%        (p=0.000 n=30+30)
Unicode         369k ± 0%       369k ± 0%  -0.03%        (p=0.032 n=30+28)
GoTypes        1.38M ± 0%      1.37M ± 0%  -0.35%        (p=0.000 n=29+30)

Comparison between c85b77c2 and now (see issue #16897):

name       old time/op     new time/op     delta
Template       307ms ± 4%      288ms ± 3%  -6.24%  (p=0.000 n=29+29)
Unicode        164ms ± 4%      150ms ± 5%  -8.20%  (p=0.000 n=30+30)
GoTypes        1.01s ± 3%      0.95s ± 3%  -5.72%  (p=0.000 n=30+29)

name       old alloc/op    new alloc/op    delta
Template      46.8MB ± 0%     46.5MB ± 0%  -0.66%  (p=0.000 n=29+30)
Unicode       37.8MB ± 0%     37.8MB ± 0%  -0.13%  (p=0.000 n=30+30)
GoTypes        143MB ± 0%      143MB ± 0%  -0.11%  (p=0.000 n=30+30)

name       old allocs/op   new allocs/op   delta
Template        444k ± 0%       446k ± 0%  +0.48%  (p=0.000 n=30+30)
Unicode         369k ± 0%       369k ± 0%  +0.09%  (p=0.000 n=30+28)
GoTypes        1.35M ± 0%      1.37M ± 0%  +1.47%  (p=0.000 n=30+30)

There's still a small increase (< 1.5%) for GoTypes but pending a complete
rewrite of fmt.go, this seems ok again.

Fixes #16897.

Change-Id: I7e0e56cd1b9f981252eded917f5752259d402354
Reviewed-on: https://go-review.googlesource.com/29087
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      37d452c3
  3. 12 Sep, 2016 23 commits
  5. 11 Sep, 2016 6 commits
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