On 09/06/2017 04:38 PM, Marcus Müller via USRP-users wrote: > Hi Mr Hamilton, > > So, what you'd want to optimize first depends on what needs the most > optimization. Your x86 program might be a good place to start looking > into what the bottleneck is. If you're running Linux on your x86, I can > heartily recommend `perf`, which is a tool that lets you display live, > record and analyze the points in your code where the program spends most > time.
"perf top" gives results pretty quickly. It also sounds like you aren't using both cpu's to the full extent. Maybe there is just one block doing all the work? Also, looking at using rfnoc to do high rate functions to reduce calculations that need doing on the arm is a good plan. Philip > > In general, modern x86 have way larger memory bandwidth and larger CPU > caches, so that alone can become critical, but also things like more > capable SIMD instructions and less hardware-handling overhead. > > I don't know whether this helped you much, but I hope it's a start, > best regards, > > Marcus Müller > > On 09/06/2017 10:06 PM, S Hamilton via USRP-users wrote: >> We're moving an application that we had running on pc hardware with >> the Ettus B210, to the embedded arm E310. On the pc side we were at >> 80% idle cpu when running (intel i5-4570). With armv7 we're down to >> 30% idle, with one of the cores @100% so it's not keeping up. >> Are there any arm specific optimizations that are recommended or gotchas. >> We are using the release4 version of the SDK and firmware. >> >> We'd also like to use the complex_to_mag_approx RFNOC block. Is there >> any sample code around to look at. >> >> Thanks, >> >> >> _______________________________________________ >> USRP-users mailing list >> [email protected] >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > _______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
