[zeromq-dev] Fwd: [libzmq] Atomic operations for armv7a (#322)

[Pieter Hintjens]

Yes, nice improvement in performance...

On Tue, Apr 24, 2012 at 7:20 PM, Ian Barber <ian.barber at gmail.com> wrote:
> Just wanted to repost this commit to the list - looks very nice to me, but
> my opinion is of much worth on this one :) It's merged in if anyone wants to
> pull master and try.
>
> Ian
>
>
> ---------- Forwarded message ----------
> From: Patrick Trantham
> <reply+i-4264612-72449c8da2648442ec257fb7508ee2e07f8439d3-210006 at reply.github.com>
> Date: Tue, Apr 24, 2012 at 6:15 PM
> Subject: [libzmq] Atomic operations for armv7a (#322)
> To: Ian Barber <ian.barber at gmail.com>
>
>
> This commit implements atomic operations for the armv7a architecture
> using gcc inline assembly.  This offers higher performance compared to
> pthread mutexes.
>
> Tested on an am3517 evm, clocked at 600MHz:
>
> ./inproc_thr 200 1000000
> ------------------------
> 53-60K messages / sec, pthread mutexes
> 73-90K messages / sec, assembly atomic ops
>
> ./inproc_lat 200 1000000
> ------------------------
> average latency: 42.234 [us], pthread mutexes
> average latency: 35.496 [us], assembly atomic ops
>
> You can merge this Pull Request by running:
>
>  git pull https://github.com/tranthamp/libzmq master
>
> Or you can view, comment on it, or merge it online at:
>
>  https://github.com/zeromq/libzmq/pull/322
>
> -- Commit Summary --
>
> * Implement atomic operations for armv7a
>
> -- File Changes --
>
> M src/atomic_counter.hpp (32)
> M src/atomic_ptr.hpp (35)
>
> -- Patch Links --
>
>  https://github.com/zeromq/libzmq/pull/322.patch
>  https://github.com/zeromq/libzmq/pull/322.diff
>
> ---
> Reply to this email directly or view it on GitHub:
> https://github.com/zeromq/libzmq/pull/322
>
>
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