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| author | Richard Musiol <mail@richard-musiol.de> | 2019-04-08 00:36:55 +0200 |
|---|---|---|
| committer | Richard Musiol <neelance@gmail.com> | 2019-04-16 15:03:34 +0000 |
| commit | 460f9c60689c38bdd938d09903f3b414f6082a7d (patch) | |
| tree | 13b35308f3e97d6696bf4bd1a0dd78263b724b0e /src/runtime/malloc.go | |
| parent | e47090ab40967c2e5e6058838319259b4cc0d508 (diff) | |
| download | go-460f9c60689c38bdd938d09903f3b414f6082a7d.tar.xz | |
runtime, cmd/link: optimize memory allocation on wasm
WebAssembly's memory is contiguous. Allocating memory at a high address
also allocates all memory up to that address. This change reduces
the initial memory allocated on wasm from 1GB to 16MB by using multiple
heap arenas and reducing the size of a heap arena.
Fixes #27462.
Change-Id: Ic941e6edcadd411e65a14cb2f9fd6c8eae02fc7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/170950
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Diffstat (limited to 'src/runtime/malloc.go')
| -rw-r--r-- | src/runtime/malloc.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 9feec1b007..c22c7aa7dc 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -248,7 +248,7 @@ const ( // logHeapArenaBytes is log_2 of heapArenaBytes. For clarity, // prefer using heapArenaBytes where possible (we need the // constant to compute some other constants). - logHeapArenaBytes = (6+20)*(_64bit*(1-sys.GoosWindows)*(1-sys.GoosAix)) + (2+20)*(_64bit*sys.GoosWindows) + (2+20)*(1-_64bit) + (8+20)*sys.GoosAix + logHeapArenaBytes = (6+20)*(_64bit*(1-sys.GoosWindows)*(1-sys.GoosAix)*(1-sys.GoarchWasm)) + (2+20)*(_64bit*sys.GoosWindows) + (2+20)*(1-_64bit) + (8+20)*sys.GoosAix + (2+20)*sys.GoarchWasm // heapArenaBitmapBytes is the size of each heap arena's bitmap. heapArenaBitmapBytes = heapArenaBytes / (sys.PtrSize * 8 / 2) @@ -394,7 +394,7 @@ func mallocinit() { _g_.m.mcache = allocmcache() // Create initial arena growth hints. - if sys.PtrSize == 8 && GOARCH != "wasm" { + if sys.PtrSize == 8 { // On a 64-bit machine, we pick the following hints // because: // |