diff options
Diffstat (limited to 'src/runtime/mpagealloc.go')
| -rw-r--r-- | src/runtime/mpagealloc.go | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/runtime/mpagealloc.go b/src/runtime/mpagealloc.go index 83db005051..a30434a534 100644 --- a/src/runtime/mpagealloc.go +++ b/src/runtime/mpagealloc.go @@ -48,6 +48,7 @@ package runtime import ( + "internal/goarch" "internal/runtime/atomic" "internal/runtime/gc" "unsafe" @@ -55,10 +56,12 @@ import ( const ( // The size of a bitmap chunk, i.e. the amount of bits (that is, pages) to consider - // in the bitmap at once. + // in the bitmap at once. It is 4MB on most platforms, except on Wasm it is 512KB. + // We use a smaller chuck size on Wasm for the same reason as the smaller arena + // size (see heapArenaBytes). pallocChunkPages = 1 << logPallocChunkPages pallocChunkBytes = pallocChunkPages * pageSize - logPallocChunkPages = 9 + logPallocChunkPages = 9*(1-goarch.IsWasm) + 6*goarch.IsWasm logPallocChunkBytes = logPallocChunkPages + gc.PageShift // The number of radix bits for each level. @@ -220,6 +223,7 @@ type pageAlloc struct { // heapAddrBits | L1 Bits | L2 Bits | L2 Entry Size // ------------------------------------------------ // 32 | 0 | 10 | 128 KiB + // 32 (wasm) | 0 | 13 | 128 KiB // 33 (iOS) | 0 | 11 | 256 KiB // 48 | 13 | 13 | 1 MiB // |