Yes, thank you, I've tried this before: I allocated 10 or more cores purely
for the USRPs. Overflows are generally less, but when starting any
application, one or two "O" are guaranteed to be printed.
Therefore, I suggested that maybe it's a case of cache or something else.
I was playing with num_recv_frames, but the problem is that I do not know
how to determine the correct value for it. Now it's num_recv_frames = 150,
and recv_frame_size = 8000.
In general, while running my application, a lot of start / kill processes,
which are causes overflows. If you do not touch anything, do not run
anything - everything is fine, even without the allocation of cores by
isolcpus and numactl :)
чт, 26 июл. 2018 г. в 19:07, Marcus D. Leech <mle...@ripnet.com>:
> Make sure that you’re increasing the num_recv_frames in the device args as
> well
>
>
> Sent from my iPhone
>
> On Jul 26, 2018, at 11:10 AM, Keith k via USRP-users <
> usrp-users@lists.ettus.com> wrote:
>
> How many CPU cores do you have? I've also found this a problem with
> multiusrp and high data rates. The solution for me was to isolate cpu cores
> and then use taskset to run my program on the isolated cores. This
> drastically reduced the number of overflows to almost none. This however
> will probably require you to use an 8 core or higher computer. UHD spawns 2
> threads for every USRP you have, so you can only schedule so many threads
> on an isolated core before they starve each other.
>
> On Thu, Jul 26, 2018 at 1:56 PM, Андрій Хома via USRP-users <
> usrp-users@lists.ettus.com> wrote:
>
>> Perhaps a dumb question: what is more critical in order to avoid buffer
>> overflows ("O")? Frequency, cache size, or something else?
>> I dealt with two processors
>> 1: 2.2GHz, 25MB cache
>> 2: 3.5GHz, 15MB cache
>> In both cases, I observed overflows
>>
>> 4х usrp b205mini, through usb3.0
>>
>> Thank you, Andrei.
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
>
> --
> -Keith Kotyk
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
