Fair enough. To ensure that this problem is logged with the Ettus engineering team, is there an official mailing list or email address that I should report this bug to?
On Wed, Apr 14, 2021 at 12:02 PM Marcus D Leech <patchvonbr...@gmail.com> wrote: > That just sounds like a bug. The Python API is still considered > experimental. > > Sent from my iPhone > > On Apr 13, 2021, at 9:22 PM, Brendan Horsfield < > brendan.horsfi...@vectalabs.com> wrote: > > > Hi Marcus, > > I have run some comparison tests between the C++ and Python versions of > "benchmark_rate", using a high sampling rate in order to force some > overruns. > > It appears that both versions are detecting & reporting overrun events > correctly. However, when it comes to the number of dropped samples, the > Python version always returns zero for the number of dropped samples. > > Do you have any idea why this is the case? Is the resolution of the timer > less fine-grained in the Python implementation perhaps? > > Thanks, > Brendan. > > > > > On Tue, Apr 13, 2021 at 11:05 PM Marcus D Leech <patchvonbr...@gmail.com> > wrote: > >> >> >> Sent from my iPhone >> >> On Apr 13, 2021, at 3:05 AM, brendan.horsfi...@vectalabs.com wrote: >> >> >> >> Hi All, >> >> I am using a Python script to capture a short burst of rx samples from my >> B210. The script is based heavily on the Ettus example “benchmark_rate.py”, >> with a couple of additional tweaks I took from the Ettus GitHub repo ( >> https://github.com/EttusResearch/uhd/blob/master/host/python/uhd/usrp/multi_usrp.py >> ). >> >> In my script I am calling my rx sampling function repeatedly using a >> “for" loop. Any errors that occur during sampling are stored in a >> uhd.types.RXMetadata() object, just like in the original Ettus script. >> >> Here’s the strange part: >> >> While the script is running, the letter ‘O’ is printed on the screen >> about 50% of the time, which I believe is an overflow warning from the >> Fastpath logger. However, the number of errors being detected by the >> RXMetadata() object is almost zero. How can this be? >> >> Some questions: >> >> - >> >> How seriously should I take the Fastpath ‘O’ warning? What does it >> actually mean? Does it mean that this burst of samples will be >> corrupted/incomplete? >> >> It absolutely means that samples were lost. >> >> The metadata should include time stamps that will allow you to compute >> how much was lost. >> >> >> - >> >> Why is the RXMetadata object not returning an error every single time >> that the Fastpath logger does? >> >> This I’m not certain of. >> >> Thanks, >> >> Brendan. >> _______________________________________________ >> USRP-users mailing list -- usrp-users@lists.ettus.com >> To unsubscribe send an email to usrp-users-le...@lists.ettus.com >> >>
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