The throttle block has some peculiar limitations. For example, if you try to set the throttle very low (like < 1k) you'll find that there is minimum threshold and what will happen is it will still give you way more samples than you expect. Before I found the head block, which allows you to terminate the FG after a certain number of samples, I tried using the throttle to slow things way down and just kill the FG manually. I was using the file sink to log my data and I saw way too much data. I looked at the throttle block code, it looked like there were some conversion between time formats that would loose precision. It wouldn't be a surprise to me if there were the throttle block behaved the same way for very high > 1M rates (that is just ignore what you asked for and perform some sort of max threshold behavior). I would suggest just retesting with out the throttle block, since you're looking to see what you're machine can handle anyway....
Sent from Outlook<http://aka.ms/weboutlook> ________________________________ From: Discuss-gnuradio <[email protected]> on behalf of Booth <[email protected]> Sent: Tuesday, April 25, 2017 6:18 AM To: [email protected] Subject: [Discuss-gnuradio] Speed test went wrong. Dear all, I wondered what would be the maximum sample rate that my PC can handle for a basic psk mod-demod. I have used the “prbs_test.grc” from gr-mapper as it contains all the necessary blocks. I changed the sample rate for the throttle to 32k, 320k,10M, 100M even 10G but the system did not break down. I repeated the experiment using different examples but the result was the same. What went wrong and do you know any appropriate projects for speed measurements. -- View this message in context: http://gnuradio.4.n7.nabble.com/Speed-test-went-wrong-tp63632.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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