runtime: severe performance drop for cgo calls in go1.22.5 [1.23 backport]

[gopherbot]

@aclements requested issue #68587 to be considered for backport to the next 1.23 minor release.

@gopherbot , please open a backport to 1.23.

[aclements]

This causes a dramatic drop in C -> Go call performance under some circumstances.

[arup-chauhan]

Hi @aclements, I wanted to work, this can be a potential workaround.

// Workaround: Use `runtime.LockOSThread()` to minimize thread switching overhead.
// This ensures the goroutine stays on the same OS thread during C -> Go calls.
runtime.LockOSThread()
defer runtime.UnlockOSThread()


Would this be viable? Feedback appreciated.

[arl]

@arup-chauhan the problem has already been worked on, the changes should be in next go release and also backported to go1.23. In fact, we're on the backporting issue here.
See #68587

[arup-chauhan]

Thankyou for the update @arl , I will try to contribute to some other issue then

[dmitshur]

We moved the NextMinor label to the parent tracking issue #68587, removing here.

[cagedmantis]

This is a severe performance regression. This change has been approved.