| commit | d55ecea9e5a5a4cfba30c6f35d4841ae66e05ccd | [log] [tgz] |
|---|---|---|
| author | Michael Anthony Knyszek <mknyszek@google.com> | Fri Nov 14 17:41:58 2025 +0000 |
| committer | Michael Knyszek <mknyszek@google.com> | Fri Nov 14 15:13:00 2025 -0800 |
| tree | b4c0d3dba5c11671d8d0958901871e523885fde9 | |
| parent | 410ef44f0054a9ab20a901895edb7db5a4d0aad7 [diff] |
runtime: usleep before stealing runnext only if not in syscall In the scheduler's steal path, we usleep(3) before stealing a _Prunning P's runnext slot. Before CL 646198, we would not call usleep(3) if the P was in _Psyscall. After CL 646198, Ps with Gs in syscalls stay in _Prunning until stolen, meaning we might unnecessarily usleep(3) where we didn't before. This probably isn't a huge deal in most cases, but can cause some apparent slowdowns in microbenchmarks that frequently take the steal path while there are syscalling goroutines. Change-Id: I5bf3df10fe61cf8d7f0e9fe9522102de66faf344 Reviewed-on: https://go-review.googlesource.com/c/go/+/720441 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Pratt <mpratt@google.com>
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 4.0 Attribution license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Official binary distributions are available at https://go.dev/dl/.
After downloading a binary release, visit https://go.dev/doc/install for installation instructions.
If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.