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| author | Michael Anthony Knyszek <mknyszek@google.com> | 2020-11-16 22:03:17 +0000 |
|---|---|---|
| committer | Michael Knyszek <mknyszek@google.com> | 2021-04-29 17:08:05 +0000 |
| commit | e03cca64073bd1b4704482c81061d19ab019b5cc (patch) | |
| tree | c94d00e50d48809aae13259777f5c77798b12103 /src/runtime | |
| parent | 5a8435d701c1c8c39f403942d4f6a0ac065635db (diff) | |
| download | go-e03cca64073bd1b4704482c81061d19ab019b5cc.tar.gz go-e03cca64073bd1b4704482c81061d19ab019b5cc.zip | |
runtime: use 4 MiB heap arenas on iOS
iOS arm64 is a 64-bit platform but with a strictly 32-bit address space
(technically 33 bits, but the bottom half is unavailable to the
application). Since address space is limited, use 4 MiB arenas instead
of 64 MiB arenas. No changes are needed to the arena index because it's
still relatively small; this change just brings iOS more in line with
32-bit platforms.
Change-Id: I484e2d273d896fd0a57cd5c25012df0aef160290
Reviewed-on: https://go-review.googlesource.com/c/go/+/270538
Trust: Michael Knyszek <mknyszek@google.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/malloc.go | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 5e4974d40e..f2d2425f53 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -227,6 +227,7 @@ const ( // -------------- --------- ---------- ---------- ----------- // */64-bit 48 64MB 1 4M (32MB) // windows/64-bit 48 4MB 64 1M (8MB) + // ios/arm64 33 4MB 1 2048 (8KB) // */32-bit 32 4MB 1 1024 (4KB) // */mips(le) 31 4MB 1 512 (2KB) @@ -247,7 +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.GoarchWasm)) + (2+20)*(_64bit*sys.GoosWindows) + (2+20)*(1-_64bit) + (2+20)*sys.GoarchWasm + logHeapArenaBytes = (6+20)*(_64bit*(1-sys.GoosWindows)*(1-sys.GoarchWasm)*(1-sys.GoosIos*sys.GoarchArm64)) + (2+20)*(_64bit*sys.GoosWindows) + (2+20)*(1-_64bit) + (2+20)*sys.GoarchWasm + (2+20)*sys.GoosIos*sys.GoarchArm64 // heapArenaBitmapBytes is the size of each heap arena's bitmap. heapArenaBitmapBytes = heapArenaBytes / (sys.PtrSize * 8 / 2) |