Performance on Xeon processors

General
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1

I have a problem with a performance on a workstation (Xeon E5-1603 v4 2.8GHz, 8Gb RAM, Geforce GTX1050Ti, Decklink duo 2). When I launch a html template the CPU loads to 100% usage and the template starts glitching. Moreover, the decklink consumer start write that in-sync changed. On another PC(i5-4460, 3.20GHz 4 cores, 16Gb RAM, GeForce GTX950) all works fine, CPU loads up to 30-40% with the same template. What can be a reason?

I use the latest build from caspar master downloads. (2.2.0 727542fc)
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2

And on the i5 you use the same build, and you also play the input on a layer?

It can have many reasons. From what I can see from your screenshots it’s not possible to say. can you post the config? Have you analyzed your system with a tool like Sandra? To make sure, the GPU and the Decklink got enough PCIe lanes and that they are from the same CPU, if you have more than one etc.

3

Yes, the same build, actions and config.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <paths>
    <media-path>media/</media-path>
    <log-path>log/</log-path>
    <data-path>data/</data-path>
    <template-path>template/</template-path>
    <font-path>font/</font-path>
  </paths>
  <lock-clear-phrase>secret</lock-clear-phrase>
  <channels>
    <channel>
      <video-mode>1080i6000</video-mode>
      <consumers>
        <screen>
          <device>1</device>
          <windowed>true</windowed>
        </screen>
        <decklink>
            <device>2</device>
            <key-device>device + 1</key-device>
            <embedded-audio>true</embedded-audio>
            <latency>default</latency>
            <keyer>external</keyer>
            <key-only>false</key-only>
            <buffer-depth>4</buffer-depth>
        </decklink>
        <system-audio/>
      </consumers>
    </channel>
  </channels>
  <controllers>
    <tcp>
      <port>5250</port>
      <protocol>AMCP</protocol>
    </tcp>
  </controllers>
  <amcp>
    <media-server>
      <host>localhost</host>
      <port>8000</port>
    </media-server>
  </amcp>
</configuration>

No, I haven’t done any analysis. Will do today.

4

That is wrong. If you set keyer to external you don’t need that. In case of an “external_separate_device” keyer you need it, but then it would need to be a number and not a formula.

The screen consumer always takes a lot of CPU power, so if possible that should be avoided. But it is by far an explication why you get the performance numbers you get. It usually takes 20% - 30% of the CPU.

5

Update system drivers specially your graphics driver
i was having same issue and in-sync warning with play decklink device on server 2.2.
and actually this is not HTML template. this issue start when you send play 1-1 decklink device 1 command after that you get memory leak.

6

I updated the drivers to my GeForce GTX 1050Ti but the results are the same.
I disable screenconsumer, it helps to reduce CPU by ~10%. And I checked PCI-e lines, it’s enough for decklink and GPU. By the way the “Warning Decklink Duo 2 1 1080i6000 In-sync changed” messages and overloading of CPU comes only on 2.2.0 version of the server.

7

yes, this issue is in version 2.3 milestone. developers are working on it.

8

Thank you for answer. Can you give a link to issue on the tracker?

9

Issue: Decklink Input missing back pressure