Hi all, I'm observing strange execution times calling the method uhd::device::send. The tx rate I'm using is 12.5 Mega samples per seconds and the method send is called with 45000 samples, given the sample rate and the amount of samples passed to this function I expect an execution time less than 0.0036 seconds per call. However as you can see in the attached image, the execution time is either around 0.0026 or around 0.005 seconds. When this (still strange to me this dual value) happens the transmissions is a successful transmission. Some time however the executions times are much higher than those as you can see in the second image attached (corrupted_tx.gif), when this happens I see some "U" in the console and the transmission is corrupted. As you can see the execution times have a singular pattern: 0.1, 0.2, 0.3, 0.4 seconds or normal values ( < 0.0036 ).
I use the send method with io_type equal to COMPLEX_FLOAT32 and send mode equal to SEND_MODE_FULL_BUFF. Is there a way to optimize the send execution time (not giving float32 but int16 for example) ? And why sometime the send lasts all that time ? Regards Gaetano Mendola -- cpp-today.blogspot.com
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