Re: [Rd] How to execute R scripts simultaneously from multiple threads

From: Hin-Tak Leung <hin-tak.leung_at_cimr.cam.ac.uk>
Date: Mon 08 Jan 2007 - 11:36:20 GMT

Erik van Zijst wrote:
> Vladimir Dergachev wrote:
<snipped>

>> At some point (years ago) there was even an argument on some mailiing list 
>> (xfree86-devel ?) about whether Xserver should support shared memory as unix 
>> socket was "fast enough" - with the other side arguing that when you pass 
>> megabyte images around (as in DVD playback) there is non-negligible overhead.

>
> We're currently doing performance tests with the RServe-approach where
> we measure the actual evaluation time of a function. I'm interested in
> the evaluation-time versus overhead ratio. Loopback TCP might work as
> long as this ratio is sufficiently high.

Slightly off-topic, Vladimir sounded as if there was any argument of supporting shared memory in X... AFAIK, the shared memory extension *is* part of Xorg!

$ grep 'MIT-SHM' /var/log/Xorg.0.log
(II) Initializing built-in extension MIT-SHM

HTL



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