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authorAndy Pan <panjf2000@gmail.com>2024-02-02 11:22:57 +0800
committerGopher Robot <gobot@golang.org>2024-02-20 14:59:49 +0000
commitd068c2cb620c1daeedc8b9cce488af45a6c2c889 (patch)
tree5753e3ea0028adaa934cb32f2be479f3f6e2cd53 /src/runtime/internal
parentc4d55ab91260ca2d538fcf3dadbccc1d1c111c96 (diff)
downloadgo-d068c2cb620c1daeedc8b9cce488af45a6c2c889.tar.xz
runtime: use eventfd as the event wait/notify mechanism for epoll
Fixes #65443 Change-Id: I9ad4689b36e87ee930d35a38322a8797896483b4 Reviewed-on: https://go-review.googlesource.com/c/go/+/560615 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Than McIntosh <thanm@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Jorropo <jorropo.pgm@gmail.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Diffstat (limited to 'src/runtime/internal')
-rw-r--r--src/runtime/internal/syscall/defs_linux.go9
-rw-r--r--src/runtime/internal/syscall/defs_linux_386.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_amd64.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_arm.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_arm64.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_loong64.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_mips64x.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_mipsx.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_ppc64x.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_riscv64.go2
-rw-r--r--src/runtime/internal/syscall/defs_linux_s390x.go2
-rw-r--r--src/runtime/internal/syscall/syscall_linux.go5
12 files changed, 34 insertions, 0 deletions
diff --git a/src/runtime/internal/syscall/defs_linux.go b/src/runtime/internal/syscall/defs_linux.go
new file mode 100644
index 0000000000..242a67b4bc
--- /dev/null
+++ b/src/runtime/internal/syscall/defs_linux.go
@@ -0,0 +1,9 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package syscall
+
+const (
+ EFD_CLOEXEC = 0x80000
+)
diff --git a/src/runtime/internal/syscall/defs_linux_386.go b/src/runtime/internal/syscall/defs_linux_386.go
index dc723a60b2..fa0ca5ed0a 100644
--- a/src/runtime/internal/syscall/defs_linux_386.go
+++ b/src/runtime/internal/syscall/defs_linux_386.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 319
SYS_EPOLL_CREATE1 = 329
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 328
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_amd64.go b/src/runtime/internal/syscall/defs_linux_amd64.go
index 886eb5bda2..71bd906ed4 100644
--- a/src/runtime/internal/syscall/defs_linux_amd64.go
+++ b/src/runtime/internal/syscall/defs_linux_amd64.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 281
SYS_EPOLL_CREATE1 = 291
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 290
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_arm.go b/src/runtime/internal/syscall/defs_linux_arm.go
index 8f812a2f68..146cda5fcb 100644
--- a/src/runtime/internal/syscall/defs_linux_arm.go
+++ b/src/runtime/internal/syscall/defs_linux_arm.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 346
SYS_EPOLL_CREATE1 = 357
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 356
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_arm64.go b/src/runtime/internal/syscall/defs_linux_arm64.go
index 48e11b0c51..0500b317e9 100644
--- a/src/runtime/internal/syscall/defs_linux_arm64.go
+++ b/src/runtime/internal/syscall/defs_linux_arm64.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 22
SYS_FCNTL = 25
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 19
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_loong64.go b/src/runtime/internal/syscall/defs_linux_loong64.go
index b78ef81861..2c67b7b568 100644
--- a/src/runtime/internal/syscall/defs_linux_loong64.go
+++ b/src/runtime/internal/syscall/defs_linux_loong64.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 22
SYS_FCNTL = 25
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 19
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_mips64x.go b/src/runtime/internal/syscall/defs_linux_mips64x.go
index 92b49ca969..3031af241b 100644
--- a/src/runtime/internal/syscall/defs_linux_mips64x.go
+++ b/src/runtime/internal/syscall/defs_linux_mips64x.go
@@ -12,6 +12,7 @@ const (
SYS_EPOLL_PWAIT = 5272
SYS_EPOLL_CREATE1 = 5285
SYS_EPOLL_PWAIT2 = 5441
+ SYS_EVENTFD2 = 5284
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -23,6 +24,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x80
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_mipsx.go b/src/runtime/internal/syscall/defs_linux_mipsx.go
index e28d09c7f1..4d51921abd 100644
--- a/src/runtime/internal/syscall/defs_linux_mipsx.go
+++ b/src/runtime/internal/syscall/defs_linux_mipsx.go
@@ -12,6 +12,7 @@ const (
SYS_EPOLL_PWAIT = 4313
SYS_EPOLL_CREATE1 = 4326
SYS_EPOLL_PWAIT2 = 4441
+ SYS_EVENTFD2 = 4325
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -23,6 +24,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x80
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_ppc64x.go b/src/runtime/internal/syscall/defs_linux_ppc64x.go
index a74483eb6d..fcd15e60a2 100644
--- a/src/runtime/internal/syscall/defs_linux_ppc64x.go
+++ b/src/runtime/internal/syscall/defs_linux_ppc64x.go
@@ -12,6 +12,7 @@ const (
SYS_EPOLL_PWAIT = 303
SYS_EPOLL_CREATE1 = 315
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 314
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -23,6 +24,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_riscv64.go b/src/runtime/internal/syscall/defs_linux_riscv64.go
index b78ef81861..2c67b7b568 100644
--- a/src/runtime/internal/syscall/defs_linux_riscv64.go
+++ b/src/runtime/internal/syscall/defs_linux_riscv64.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 22
SYS_FCNTL = 25
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 19
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/defs_linux_s390x.go b/src/runtime/internal/syscall/defs_linux_s390x.go
index a7bb1ba66d..c1deed6c74 100644
--- a/src/runtime/internal/syscall/defs_linux_s390x.go
+++ b/src/runtime/internal/syscall/defs_linux_s390x.go
@@ -10,6 +10,7 @@ const (
SYS_EPOLL_PWAIT = 312
SYS_EPOLL_CREATE1 = 327
SYS_EPOLL_PWAIT2 = 441
+ SYS_EVENTFD2 = 323
EPOLLIN = 0x1
EPOLLOUT = 0x4
@@ -21,6 +22,7 @@ const (
EPOLL_CTL_ADD = 0x1
EPOLL_CTL_DEL = 0x2
EPOLL_CTL_MOD = 0x3
+ EFD_NONBLOCK = 0x800
)
type EpollEvent struct {
diff --git a/src/runtime/internal/syscall/syscall_linux.go b/src/runtime/internal/syscall/syscall_linux.go
index 7209634edb..cb88659394 100644
--- a/src/runtime/internal/syscall/syscall_linux.go
+++ b/src/runtime/internal/syscall/syscall_linux.go
@@ -60,3 +60,8 @@ func EpollCtl(epfd, op, fd int32, event *EpollEvent) (errno uintptr) {
_, _, e := Syscall6(SYS_EPOLL_CTL, uintptr(epfd), uintptr(op), uintptr(fd), uintptr(unsafe.Pointer(event)), 0, 0)
return e
}
+
+func Eventfd(initval, flags int32) (fd int32, errno uintptr) {
+ r1, _, e := Syscall6(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0, 0, 0, 0)
+ return int32(r1), e
+}
generated by cgit v1.3 (git 2.53.0) at 2026-04-15 21:00:43 +0000