diff options
| author | Rhys Hiltner <rhys.hiltner@gmail.com> | 2025-03-14 12:38:34 -0700 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2025-04-22 10:00:26 -0700 |
| commit | 7a177114df3e26f4362378e907a869c4fbbf38b7 (patch) | |
| tree | ca0b576cd709f8d8b879b75eafd537ba7c756735 /src/runtime/runtime2.go | |
| parent | 7ce45a014c52375d6a3da577828c9f035a72857a (diff) | |
| download | go-7a177114df3e26f4362378e907a869c4fbbf38b7.tar.xz | |
runtime: commit to spinbitmutex GOEXPERIMENT
Use the "spinbit" mutex implementation always (including on platforms
that need to emulate atomic.Xchg8), and delete the prior "tristate"
implementations.
The exception is GOARCH=wasm, where the Go runtime does not use multiple
threads.
For #68578
Change-Id: Ifc29bbfa05071d776c23a19ae185891a03a82417
Reviewed-on: https://go-review.googlesource.com/c/go/+/658456
Auto-Submit: Rhys Hiltner <rhys.hiltner@gmail.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index 27d14b890b..f7371c450b 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -8,7 +8,6 @@ import ( "internal/abi" "internal/chacha8rand" "internal/goarch" - "internal/goexperiment" "internal/runtime/atomic" "internal/runtime/sys" "unsafe" @@ -628,9 +627,9 @@ type mPadded struct { // Size the runtime.m structure so it fits in the 2048-byte size class, and // not in the next-smallest (1792-byte) size class. That leaves the 11 low - // bits of muintptr values available for flags, as required for - // GOEXPERIMENT=spinbitmutex. - _ [goexperiment.SpinbitMutexInt * (2048 - mallocHeaderSize - mRedZoneSize - unsafe.Sizeof(m{}))]byte + // bits of muintptr values available for flags, as required by + // lock_spinbit.go. + _ [(1 - goarch.IsWasm) * (2048 - mallocHeaderSize - mRedZoneSize - unsafe.Sizeof(m{}))]byte } type p struct { |