[ruby-core:63595] [ruby-trunk - Feature #8788] use eventfd on newer Linux instead of pipe for timer thread

Issue #8788 has been updated by Eric Wong.

File tt_efd_v2.patch added
Description updated

Updated patch (from testing for #10009).

Uploading for archival purposes.  This version is probably less intrusive and
falls back to pipe in case of ENOSYS (in case glibc supports eventfd and the
kernel has eventfd disabled).

This has no measurable performance improvement for me, but saves two FDs
and a few bytes of kernel memory for every process.


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Feature #8788: use eventfd on newer Linux instead of pipe for timer thread
https://bugs.ruby-lang.org/issues/8788#change-47648

* Author: Eric Wong
* Status: Feedback
* Priority: Low
* Assignee: 
* Category: core
* Target version: next minor
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eventfd is a cheaper alternative to pipe for self-notification (signals) on Linux

I will submit patches in the next few days/weeks unless there are objections
(or somebody else wants to do it sooner).  I'd also like to cleanup some of the existing #ifdefs in that area while I'm at it.


---Files--------------------------------
0001-thread_pthread-use-eventfd-under-Linux-for-timer-thr.patch (9.08 KB)
0001-thread_pthread-use-eventfd-under-Linux-for-timer-thr.patch (9.07 KB)
tt_efd_v2.patch (5.91 KB)


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