Experimental Physics and
| |||||||||||||||||
|
Well, I am not sure what you call performance evaluation. But as far as running epics/seq/etc, that's no problem. (I used 3.14.11 with minimal patching) The issue you may be facing is I/O access. On the ts7370 (ARM9), it takes me 4ms to get a AI reading. The main issues on this board is 1/ no buffering 2/ you are running a full blown linux OS For higher througput, I am looking at microcontrollers (arduino megas or more advanced) Read this to get a flavor of the issues
;) http://sites.google.com/site/measuringstuff/the-arduino To have a full blown arm production deployment (as we are strongly considering), there are practical issues: 1/ management of SD images (SD card) 2/ controlled upgrade/change of SD image To bypass those issues, we are going in the direction of beagleboard-xm (full blown linux desktop environment, with epics IOC but no direct critical I/O) attached to microcontrollers (for critical I/O) Cost of parts ~ $200 One of my coworkers called this design 'smart chassis': with the spare IO, you can monitor the environment (temp, vibration, etc) I call it
'epics plug-and-play': You plug your chassis to your network and the epics PV are immediately available. For maintenance, when the hardware is swapped/changed, the ioc software is changed with it. For troubleshooting on the bench, engineers/technicians can attach a keyboard and a monitor to a chassis and immediately start working. (Qt works great with embedded systems ;) We design a lot of our electronics, so by using open hardware solutions, we can *in theory* integrate the ARM+ucontroller directly in our electronics design (maybe at 2nd generation design) ...etc... In short, they are several advantages to this design which fit *OUR* needs.
You see, the tide is also going that direction... From: "[email protected]" <[email protected]> To: Emmanuel Mayssat <[email protected]> Sent: Friday, March 16, 2012 9:39 AM Subject: Re: EPICS performance evaluation Yes, I am using TS7500 from embeddedarm (ARM9).. So, have u performed any performance evaluation test for ur arm platform. Thanking you,
| ||||||||||||||||
ANJ, 18 Nov 2013 |
·
Home
·
News
·
About
·
Base
·
Modules
·
Extensions
·
Distributions
·
Download
·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing · |