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cmd/compile: pack bool fields in Node, Name, Func and Type structs to bitsets

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This reduces compiler memory usage by up to 4% - see compilebench
results below.

name       old time/op     new time/op     delta
Template       245ms ± 4%      241ms ± 2%  -1.88%  (p=0.029 n=10+10)
Unicode        126ms ± 3%      124ms ± 3%    ~     (p=0.105 n=10+10)
GoTypes        805ms ± 2%      813ms ± 3%    ~     (p=0.515 n=8+10)
Compiler       3.95s ± 2%      3.83s ± 1%  -2.96%  (p=0.000 n=9+10)
MakeBash       47.4s ± 4%      46.6s ± 1%  -1.59%  (p=0.028 n=9+10)

name       old user-ns/op  new user-ns/op  delta
Template        324M ± 5%       326M ± 3%    ~     (p=0.935 n=10+10)
Unicode         186M ± 5%       178M ±10%    ~     (p=0.067 n=9+10)
GoTypes        1.08G ± 7%      1.09G ± 4%    ~     (p=0.956 n=10+10)
Compiler       5.34G ± 4%      5.31G ± 1%    ~     (p=0.501 n=10+8)

name       old alloc/op    new alloc/op    delta
Template      41.0MB ± 0%     39.8MB ± 0%  -3.03%  (p=0.000 n=10+10)
Unicode       32.3MB ± 0%     31.0MB ± 0%  -4.13%  (p=0.000 n=10+10)
GoTypes        119MB ± 0%      116MB ± 0%  -2.39%  (p=0.000 n=10+10)
Compiler       499MB ± 0%      487MB ± 0%  -2.48%  (p=0.000 n=10+10)

name       old allocs/op   new allocs/op   delta
Template        380k ± 1%       379k ± 1%    ~     (p=0.436 n=10+10)
Unicode         324k ± 1%       324k ± 0%    ~     (p=0.853 n=10+10)
GoTypes        1.15M ± 0%      1.15M ± 0%    ~     (p=0.481 n=10+10)
Compiler       4.41M ± 0%      4.41M ± 0%  -0.12%  (p=0.007 n=10+10)

name       old text-bytes  new text-bytes  delta
HelloSize       623k ± 0%       623k ± 0%    ~     (all equal)
CmdGoSize      6.64M ± 0%      6.64M ± 0%    ~     (all equal)

name       old data-bytes  new data-bytes  delta
HelloSize      5.81k ± 0%      5.81k ± 0%    ~     (all equal)
CmdGoSize       238k ± 0%       238k ± 0%    ~     (all equal)

name       old bss-bytes   new bss-bytes   delta
HelloSize       134k ± 0%       134k ± 0%    ~     (all equal)
CmdGoSize       152k ± 0%       152k ± 0%    ~     (all equal)

name       old exe-bytes   new exe-bytes   delta
HelloSize       967k ± 0%       967k ± 0%    ~     (all equal)
CmdGoSize      10.2M ± 0%      10.2M ± 0%    ~     (all equal)

Change-Id: I1f40af738254892bd6c8ba2eb43390b175753d52
Reviewed-on: https://go-review.googlesource.com/37445
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Aliaksandr Valialkin 2017-02-27 19:56:38 +02:00 • committed by Matthew Dempsky
parent fbf4dd91b9
commit ed70f37e73
40 changed files with 610 additions and 524 deletions
Download patch file Download diff file Expand all files Collapse all files

24
src/cmd/compile/internal/gc/pgen_test.go
View file

@ -60,13 +60,13 @@ func TestCmpstackvar(t *testing.T) {
true,
},
{
Node{Class: PAUTO, Used: true},
Node{Class: PAUTO, Used: false},
Node{Class: PAUTO, flags: nodeUsed},
Node{Class: PAUTO},
true,
},
{
Node{Class: PAUTO, Used: false},
Node{Class: PAUTO, Used: true},
Node{Class: PAUTO},
Node{Class: PAUTO, flags: nodeUsed},
false,
},
{
@ -80,13 +80,13 @@ func TestCmpstackvar(t *testing.T) {
true,
},
{
Node{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: true}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: false}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{flags: nameNeedzero}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{}},
true,
},
{
Node{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: false}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: true}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{}},
Node{Class: PAUTO, Type: &Type{}, Name: &Name{flags: nameNeedzero}},
false,
},
{
@ -134,10 +134,10 @@ func TestStackvarSort(t *testing.T) {
{Class: PFUNC, Xoffset: 0, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PFUNC, Xoffset: 10, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PFUNC, Xoffset: 20, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Used: true, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, flags: nodeUsed, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: typeWithoutPointers(), Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: true}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{flags: nameNeedzero}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{Width: 1}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{Width: 2}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{}, Sym: &Sym{Name: "abc"}},
@ -148,8 +148,8 @@ func TestStackvarSort(t *testing.T) {
{Class: PFUNC, Xoffset: 0, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PFUNC, Xoffset: 10, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PFUNC, Xoffset: 20, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Used: true, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{Needzero: true}, Sym: &Sym{}},
{Class: PAUTO, flags: nodeUsed, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{flags: nameNeedzero}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{Width: 2}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{Width: 1}, Name: &Name{}, Sym: &Sym{}},
{Class: PAUTO, Type: &Type{}, Name: &Name{}, Sym: &Sym{}},