Hi Prady,
Pradyumna Sampath wrote:
Hi Armin,
On Wed, Jun 30, 2010 at 1:33 PM, Armin Steinhoff <armin@xxxxxxxxxxxx> wrote:
what are you using if you need a "real fast" interprocess communication ?
Does the posix mqueue's not fit your need ?
The mqueue system is based on the file system and isn't the fastest.
The concept of mqueue is OK ...
Have you tried them ? Do
have some kind of numbers about your definition of fast ?
Local message exchange between lokal processes in less than 10us.
For me, the POSIX mqueues seemed to work, though with some initial
trouble which was fixed with a patch to the kernel follow this thread
( http://lkml.org/lkml/2010/4/2/293 ) , this patch is now queued for
mainline inclusion for 2.6.35.
There is also a new test suite to measure message queue perf in the
rt-tests. Its called pmqtest.
Interesting ... I will give it a try.
I plan do some conceptual work for a UIO based message passing solution.
It should be possible to use read and write (triggering
uio_event_notify() ) and a UIO device memory to implement a non-copy
data exchange.
Regards
--Armin
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