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From: | George Nychis |
Subject: | Re: [Discuss-gnuradio] USRP2 latency calculations |
Date: | Wed, 05 Nov 2008 12:58:53 -0500 |
User-agent: | Thunderbird 2.0.0.17 (X11/20080925) |
set_freq would not be a good measure, since it takes a while to configure the daughterboard. find() isn't great either, since it waits 10ms to ensure that it's gathered all responses to it's broadcast. set_rx_decim should give a reasonable measurement, as long as you're not streaming data.
BTW, I also have code which can be run which actually measures the latency on USRP1, rather than just theoretical calculations that you've found on the wiki:
https://www.cgran.org/wiki/ArchitectureLatencyMeasurementsIt uses pings and some modifications to the Linux kernel to measure latency from host->kernel->USRP, etc.
- George
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