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Subject: Re: Large waveform PV through CA Gateway
From: Dirk Zimoch <dirk.zimoch@psi.ch>
To: "Chen, Xihui" <chenx1@ornl.gov>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Mon, 25 Jun 2012 17:01:29 +0200
Chen, Xihui wrote:
Hi,

I have a performance issue with transferring large image PV(2048*2048 at 1hz) through CA gateway. Without CA gateway, the client are able to update at 1hz, but with ca gateway, it can only get updates every 10 second. The CPU usage on IOC, gateway and client are all very low. I want to know if anyone has similar experience?

Thanks,
Xihui



Hello Xihui,

Yes we see the same effect. Even worse: When we transfer too many waveforms and the cpu fraction of the gateway raises to something like 20% all the OTHER (scalar) values appear frozen.

The gateway needs a major re-design.

Dirk



References:
Large waveform PV through CA Gateway Chen, Xihui

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