[Python-Dev] Slides from today's parallel/async Python talk

Christian Heimes christian at python.org
Thu Mar 14 13:21:09 CET 2013

Am 14.03.2013 03:05, schrieb Trent Nelson:
>     Just posted the slides for those that didn't have the benefit of
>     attending the language summit today:
>         https://speakerdeck.com/trent/parallelizing-the-python-interpreter-an-alternate-approach-to-async

Wow, neat! Your idea with Py_PXCTC is ingenious.

As far as I remember the FS and GS segment registers are used by most
modern operating systems on x86 and x86_64 platforms nowadays to
distinguish threads. TLS is implemented with FS and GS registers. I
guess the __read[gf]sdword() intrinsics do exactly the same. Reading
registers is super fast and should have a negligible effect on code.

ARM CPUs don't have segment registers because they have a simpler
addressing model. The register CP15 came up after a couple of Google

IMHO you should target x86, x86_64, ARMv6 and ARMv7. ARMv7 is going to
be more important than x86 in the future. We are going to see more ARM
based servers.


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