Messages in this thread | | | From | Linus Torvalds <> | Date | Wed, 3 Apr 2024 13:57:11 -0700 | Subject | Re: user-space concurrent pipe buffer scheduler interactions |
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On Wed, 3 Apr 2024 at 13:52, Michael Clark <michael@metaparadigm.com> wrote: > > On 4/4/24 05:56, Linus Torvalds wrote: > > On Tue, 2 Apr 2024 at 13:54, Michael Clark <michael@metaparadigm.com> wrote: > >> > >> I am working on a low latency cross-platform concurrent pipe buffer > >> using C11 threads and atomics. > > > > You will never get good performance doing spinlocks in user space > > unless you actually tell the scheduler about the spinlocks, and have > > some way to actually sleep on contention. > > > > Which I don't see you as having. > > We can work on this.
It's been tried.
Nobody ever found a use-case that is sufficiently convincing, but see the write-up at
https://lwn.net/Articles/944895/
for a pointer to at least attempts.
Linus
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