1f354a60ff
Windows syscall.SyscallN currently calls lockOSThread for every syscall. This can be expensive and produce unnecessary context switches, especially when the syscall is called frequently under high contention. The lockOSThread was necessary to ensure that cgocall wouldn't reschedule the goroutine to a different M, as the syscall return values are reported back in the M struct. This CL instructs cgocall to copy the syscall return values into the the M that will see the caller on return, so the caller no longer needs to call lockOSThread. Updates #58336. Cq-Include-Trybots: luci.golang.try:gotip-windows-arm64,gotip-windows-amd64-longtest Change-Id: If6644fd111dbacab74e7dcee2afa18ca146735da Reviewed-on: https://go-review.googlesource.com/c/go/+/562915 Reviewed-by: Alex Brainman <alex.brainman@gmail.com> Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com> Reviewed-by: Than McIntosh <thanm@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Pratt <mpratt@google.com> Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> |
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The Go Programming Language
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