On Thu, May 20, 2021 at 2:17 PM Jonathan Corbet [off-list ref] wrote:

Peter Oskolkov [off-list ref] writes:

quoted

As indicated earlier in the FUTEX_SWAP patchset:

https://lore.kernel.org/lkml/20200722234538.166697-1-posk@posk.io/ (local)

"Google Fibers" is a userspace scheduling framework
used widely and successfully at Google to improve in-process workload
isolation and response latencies. We are working on open-sourcing
this framework, and UMCG (User-Managed Concurrency Groups) kernel
patches are intended as the foundation of this.

So I have to ask...is there *any* documentation out there on what this
is and how people are supposed to use it?  Shockingly, typing "Google
fibers" into Google leads to a less than fully joyful outcome...  This
won't be easy for anybody to review if they have to start by
reverse-engineering what it's supposed to do.

Hi Jonathan,

There is this Linux Plumbers video: https://www.youtube.com/watch?v=KXuZi9aeGTw
And the pdf: http://pdxplumbers.osuosl.org/2013/ocw//system/presentations/1653/original/LPC%20-%20User%20Threading.pdf

I did not reference them in the patchset because links to sites other
than kernel.org are strongly discouraged... I will definitely add a
documentation patch.

Feel free to reach out to me directly or through this LKML thread if
you have any questions.

Do you think a documentation patch would be useful at this point, as
opposed to a free-form email discussion?

Thanks,
Peter

Thanks,

jon