Skip to content

G
go
Switch branch/tag
  1. 13 Apr, 2016 13 commits
    • David Crawshaw's avatar
      cmd/compile, etc: store method tables as offsets · 7d469179
      David Crawshaw authored 
      This CL introduces the typeOff type and a lookup method of the same
name that can turn a typeOff offset into an *rtype.

In a typical Go binary (built with buildmode=exe, pie, c-archive, or
c-shared), there is one moduledata and all typeOff values are offsets
relative to firstmoduledata.types. This makes computing the pointer
cheap in typical programs.

With buildmode=shared (and one day, buildmode=plugin) there are
multiple modules whose relative offset is determined at runtime.
We identify a type in the general case by the pair of the original
*rtype that references it and its typeOff value. We determine
the module from the original pointer, and then use the typeOff from
there to compute the final *rtype.

To ensure there is only one *rtype representing each type, the
runtime initializes a typemap for each module, using any identical
type from an earlier module when resolving that offset. This means
that types computed from an offset match the type mapped by the
pointer dynamic relocations.

A series of followup CLs will replace other *rtype values with typeOff
(and name/*string with nameOff).

For types created at runtime by reflect, type offsets are treated as
global IDs and reference into a reflect offset map kept by the runtime.

darwin/amd64:
	cmd/go:  -57KB (0.6%)
	jujud:  -557KB (0.8%)

linux/amd64 PIE:
	cmd/go: -361KB (3.0%)
	jujud:  -3.5MB (4.2%)

For #6853.

Change-Id: Icf096fd884a0a0cb9f280f46f7a26c70a9006c96
Reviewed-on: https://go-review.googlesource.com/21285Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      7d469179
    • Alexandru Moșoi's avatar
      cmd/compile: use shared dom tree for cse, too · e0611b16
      Alexandru Moșoi authored 
      Missed this in the previous CL where the shared
dom tree was introduced.

Change-Id: If0bd85d4b4567d7e87814ed511603b1303ab3903
Reviewed-on: https://go-review.googlesource.com/21970
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Chase <drchase@google.com>
      e0611b16
    • Shahar Kohanim's avatar
      cmd/link: rename Pcln to FuncInfo · 61b7a9c5
      Shahar Kohanim authored 
      After non pcln fields were added to it in a previous commit.

Change-Id: Icf92c0774d157c61399a6fc2a3c4d2cd47a634d2
Reviewed-on: https://go-review.googlesource.com/21921
Run-TryBot: Shahar Kohanim <skohanim@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
      61b7a9c5
    • Tal Shprecher's avatar
      cmd/compile: make enqueued map keys fail validation on forward types · 24967ec1
      Tal Shprecher authored 
      Map keys are currently validated in multiple locations but share
a common validation routine. The problem is that early validations
should be lenient enough to allow for forward types while the final
validations should not. The final validations should fail on forward
types since they've already settled.

This change also separates the key type checking from the creation
of the map via typMap. Instead of the mapqueue being populated in
copytype() by checking the map line number, it's populated in the
same block that validates the key type. This isolates key validation
logic while type checking.

Fixes #14988

Change-Id: Ia47cf6213585d6c63b3a35249104c0439feae658
Reviewed-on: https://go-review.googlesource.com/21830Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      24967ec1
    • Matthew Dempsky's avatar
      cmd/compile: fix crash on bare package name in constant declarations · 0e01db4b
      Matthew Dempsky authored 
      Fixes #11361.

Change-Id: I70b8808f97f0e07de680e7e6ede1322ea0fdbbc0
Reviewed-on: https://go-review.googlesource.com/21936Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      0e01db4b
    • Tal Shprecher's avatar
      cmd/compile: remove unnecessary assignments while type checking. · 6531fab0
      Tal Shprecher authored 
      Change-Id: Ica0ec84714d7f01d800d62fa10cdb08321d43cf3
Reviewed-on: https://go-review.googlesource.com/21967Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      6531fab0
    • Matthew Dempsky's avatar
      runtime: simplify setPanicOnFault slightly · 6af4e996
      Matthew Dempsky authored 
      No need to acquire the M just to change G's paniconfault flag, and the
original C implementation of SetPanicOnFault did not. The M
acquisition logic is an artifact of golang.org/cl/131010044, which was
started before golang.org/cl/123640043 (which introduced the current
"getg" function) was submitted.

Change-Id: I6d1939008660210be46904395cf5f5bbc2c8f754
Reviewed-on: https://go-review.googlesource.com/21935
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      6af4e996
    • Brad Fitzpatrick's avatar
      all: use new io.SeekFoo constants instead of os.SEEK_FOO · 381e5eee
      Brad Fitzpatrick authored 
      Automated change.

Fixes #15269

Change-Id: I8deb2ac0101d3f7c390467ceb0a1561b72edbb2f
Reviewed-on: https://go-review.googlesource.com/21962
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: default avatarAndrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      381e5eee
    • Martin Möhrmann's avatar
      strings: improve explode and correct comment · 819e0b29
      Martin Möhrmann authored 
      Merges explodetests into splittests which already contain
some of the tests that cover explode.

Adds a test to cover the utf8.RuneError branch in explode.

name      old time/op  new time/op  delta
Split1-2  14.9ms ± 0%  14.2ms ± 0%  -4.06%  (p=0.000 n=47+49)

Change-Id: I00f796bd2edab70e926ea9e65439d820c6a28254
Reviewed-on: https://go-review.googlesource.com/21609
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      819e0b29
    • Emmanuel Odeke's avatar
      html/template: add examples of loading templates from files · 3f66d8c8
      Emmanuel Odeke authored 
      Adds examples showing loading templates from files and
executing them.

Shows examples:
- Using ParseGlob.
- Using ParseFiles.
- Using helper functions to share and use templates
in different contexts by adding them to an existing
bundle of templates.
- Using a group of driver templates with distinct sets
of helper templates.

Almost all of the code was directly copied from text/template.

Fixes #8500

Change-Id: Ic3d91d5232afc5a1cd2d8cd3d9a5f3b754c64225
Reviewed-on: https://go-review.googlesource.com/21854Reviewed-by: default avatarAndrew Gerrand <adg@golang.org>
      3f66d8c8
    • Josh Bleecher Snyder's avatar
      cmd/compile: teach CSE that new objects are bespoke · db5338f8
      Josh Bleecher Snyder authored 
      runtime.newobject never returns the same thing twice,
so the resulting value will never be a common subexpression.

This helps when compiling large static data structures
that include pointers, such as maps and slices.
No clear performance impact on other code. (See below.)

For the code in issue #15112:

Before:
  real	1m14.238s
  user	1m18.985s
  sys	0m0.787s

After:
  real	0m47.172s
  user	0m52.248s
  sys	0m0.767s

For the code in issue #15235, size 10k:

Before:
  real	0m44.916s
  user	0m46.577s
  sys	0m0.304s

After:
  real	0m7.703s
  user	0m9.041s
  sys	0m0.316s

Still more work to be done, particularly for #15112.

Updates #15112
Updates #15235


name       old time/op      new time/op      delta
Template        330ms ±11%       333ms ±13%    ~           (p=0.749 n=20+19)
Unicode         148ms ± 6%       152ms ± 8%    ~           (p=0.072 n=18+20)
GoTypes         1.01s ± 7%       1.01s ± 3%    ~           (p=0.583 n=20+20)
Compiler        5.04s ± 2%       5.06s ± 2%    ~           (p=0.314 n=20+20)

name       old user-ns/op   new user-ns/op   delta
Template   444user-ms ±11%  445user-ms ±10%    ~           (p=0.738 n=20+20)
Unicode    215user-ms ± 5%  218user-ms ± 5%    ~           (p=0.239 n=18+18)
GoTypes    1.45user-s ± 3%  1.45user-s ± 4%    ~           (p=0.620 n=20+20)
Compiler   7.23user-s ± 2%  7.22user-s ± 2%    ~           (p=0.901 n=20+19)

name       old alloc/op     new alloc/op     delta
Template       55.0MB ± 0%      55.0MB ± 0%    ~           (p=0.547 n=20+20)
Unicode        37.6MB ± 0%      37.6MB ± 0%    ~           (p=0.301 n=20+20)
GoTypes         177MB ± 0%       177MB ± 0%    ~           (p=0.065 n=20+19)
Compiler        798MB ± 0%       797MB ± 0%  -0.05%        (p=0.000 n=19+20)

name       old allocs/op    new allocs/op    delta
Template         492k ± 0%        493k ± 0%  +0.03%        (p=0.030 n=20+20)
Unicode          377k ± 0%        377k ± 0%    ~           (p=0.423 n=20+19)
GoTypes         1.40M ± 0%       1.40M ± 0%    ~           (p=0.102 n=20+20)
Compiler        5.53M ± 0%       5.53M ± 0%    ~           (p=0.094 n=17+18)

name       old text-bytes   new text-bytes   delta
HelloSize        561k ± 0%        561k ± 0%    ~     (all samples are equal)
CmdGoSize       6.13M ± 0%       6.13M ± 0%    ~     (all samples are equal)

name       old data-bytes   new data-bytes   delta
HelloSize        128k ± 0%        128k ± 0%    ~     (all samples are equal)
CmdGoSize        306k ± 0%        306k ± 0%    ~     (all samples are equal)

name       old exe-bytes    new exe-bytes    delta
HelloSize        905k ± 0%        905k ± 0%    ~     (all samples are equal)
CmdGoSize       9.64M ± 0%       9.64M ± 0%    ~     (all samples are equal)

Change-Id: Id774e2901d7701a3ec7a1c1d1cf1d9327a4107fc
Reviewed-on: https://go-review.googlesource.com/21937
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarTodd Neal <todd@tneal.org>
      db5338f8
    • Keith Randall's avatar
      cmd/compile: fix arg to getcallerpc · 260b7daf
      Keith Randall authored 
      getcallerpc's arg needs to point to the first argument slot.
I believe this bug was introduced by Michel's itab changes
(specifically https://go-review.googlesource.com/c/20902).

Fixes #15145

Change-Id: Ifb2e17f3658e2136c7950dfc789b4d5706320683
Reviewed-on: https://go-review.googlesource.com/21931Reviewed-by: default avatarMichel Lespinasse <walken@google.com>
      260b7daf
    • Shahar Kohanim's avatar
      cmd/link: move function only lsym fields to pcln struct · b0cbe158
      Shahar Kohanim authored 
      name       old secs    new secs    delta
LinkCmdGo   0.53 ± 9%   0.53 ±10%  -1.30%  (p=0.022 n=100+99)

name       old MaxRSS  new MaxRSS  delta
LinkCmdGo   151k ± 4%   142k ± 6%  -5.92%  (p=0.000 n=98+100)

Change-Id: Ic30e63a948f8e626b3396f458a0163f7234810c1
Reviewed-on: https://go-review.googlesource.com/21920
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      b0cbe158
  3. 12 Apr, 2016 27 commits
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7