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Subject: Re: StripTool bogs down host?
From: Craig Walther <cwalther@mailhost.jach.hawaii.edu>
To: John Dobbins <jad@lepp.cornell.edu>
Cc: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Tue, 25 Apr 2006 08:22:39 -1000 (HST)
Hi John:

We had the case of a simple medm display using all (or most of) of a Linux CPU. Running top showed that X-windows was using over 90% of the machine. It turned out we were reading in analog voltages quickly and we did not have a "minimum change before update" set in our records (I forget the mnemonic) so we were getting display updates at the full scan rate.

Craig


On Tue, 25 Apr 2006, John Dobbins wrote:


Dear All,

We've begun using StripTool and notice that is sometimes appears to bog down the computer on which it is running, i.e. the mouse responds haltingly with StripTool running, there is lag in button responses,...

This is true even if StripTool is the only app running. Host is Linux.

It seems to be made worse by making the StripTool graph display larger and helped by reducing the screen update rate.

Do others have this experience? I looked in the docs and searched Tech-Talk but didn't see anything along these lines. Is something that can be done to improve responsiveness?

Thanks,

John Dobbins
Laboratory for Elementary Particle Physics
Cornell University
Ithaca, NY



-- -------------------------------------------------- Craig Walther Joint Astronomy Centre c.walther@jach.hawaii.edu 660 N. A'ohoku Place Ph: (808) 969-6556 Hilo, HI 96720 Fx: (808) 961-6516

References:
StripTool bogs down host? John Dobbins

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