high CPU consumption with styled frame and layout management

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dvribeira
Posts: 2
Joined: Mon Mar 18, 2019 10:53 am

high CPU consumption with styled frame and layout management

Post by dvribeira » Thu Sep 12, 2019 2:56 pm

Hi,

Patch P013 has been released on Tuesday for WinCC OA 3.16 and within its release notes I could find the following entry, which would seem to solve a previous issue I was facing (reported to Siemens in the SR 1-5596260916 in mid-July and still unanswered):
55926/1-5504484465: A frame, styled with CSS-stylesheet, causes high
CPU load.
So I have tried it yesterday morning with the following results:
- Indeed the issue is not triggered anymore by just simply setting the "Border Style" property of a frame to "Styled".
- Unfortunately, it is enough to do that and then enable the panel layout management (regardless of the type) to trigger the issue.

So the issue is still there, now being triggered by having a styled frame within a panel with layout management. Disabling any of those (styled border or panel layout management) immediately releases the CPU and enabling both takes again one full logical core.

I send attached the same project I had created to report this issue. Now it has an extra panel that contains a styled frame and the "Layout Type" property of the panel set to "HBox". This panel triggers the high CPU load issue.

I have already notified this through the support request as well, but I thought about giving it a try here as well.

Thanks in advance,
Daniel
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StyledFrameTest.zip
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leoknipp
Posts: 1891
Joined: Tue Aug 24, 2010 5:28 pm

Re: high CPU consumption with styled frame and layout management

Post by leoknipp » Mon Sep 16, 2019 6:45 am

If you have already submitted a service request there is no need to make a posting in the WinCC OA Portal.
In the future please use only one communication channel and take into account that the WinCC OA Portal must not be used for service requests.

Best Regards
Leopold Knipp
Senior Support Specialist

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