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Difference between revisions of "Port Throttling"
From wiki.openlighting.org
(Created page with 'Sometimes the frame rate from Output Ports has to be rate limited. The ''ThrottledOutputPortDecorator'' allows rate limits to be configured on OutputPorts using a [http://en.wiki…') |
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190); // throttle to 190 frames per second | 190); // throttle to 190 frames per second | ||
</pre> | </pre> | ||
| + | |||
| + | When port throttling is in place, messages will appear at log level 4 similar to: | ||
| + | |||
| + | <pre> | ||
| + | PortDecorators.h:48: Port rated limited, dropping frame | ||
| + | </pre> | ||
| + | |||
| + | === Current Throttled Ports === | ||
| + | |||
| + | * [[DMX USB Pro]] - 190 frames/second | ||
| + | * [[Arduino RGB Mixer]] - 20 frames/second | ||
| + | * [[DMX-TRI]] - 40 frames/second | ||
| + | |||
| + | For some devices, values can be changed in ~/.ola/ola-usbserial.conf | ||
Latest revision as of 12:42, 25 October 2011
Sometimes the frame rate from Output Ports has to be rate limited. The ThrottledOutputPortDecorator allows rate limits to be configured on OutputPorts using a Token Bucket Algorithm.
The following example shows applying the ThrottledOutputPortDecorator to an Output port to rate limit the output.
Before (no throttling):
OutputPort *output_port = new UsbProOutputPort(this, 0, "");
After (throttle to 190 frames per second)
OutputPort *output_port = new ThrottledOutputPortDecorator(
new UsbProOutputPort(this, 0, ""), // the port to throttle
plugin_adaptor->WakeUpTime(), // the select server wake up time
10, // start with 10 tokens in the bucket
190); // throttle to 190 frames per second
When port throttling is in place, messages will appear at log level 4 similar to:
PortDecorators.h:48: Port rated limited, dropping frame
Current Throttled Ports
- DMX USB Pro - 190 frames/second
- Arduino RGB Mixer - 20 frames/second
- DMX-TRI - 40 frames/second
For some devices, values can be changed in ~/.ola/ola-usbserial.conf
