I was comparing applications with and without DPDK. DPDK helps when using UHD api, but it worsens when I use it with Gnuradio.
On Wed, 22 Jun 2022 at 17:04, Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 2022-06-22 09:05, Berkay SAYGILI wrote: > > > > Now, I see that DPDK works fine with given UHD examples. But, it > > failed with Gnuradio. Can we say that Gnuradio is the bottleneck? or > > am I doing something wrong? Has anyone made the graph in the second > > test work? By the way, it is much worse when transmitting with > > Gnuradio at full bandwidth with or without DPDK. > > > > To compare Intel and Mellanox NICs, Intel was dropping samples with > > Gnuradio with very low sample rates, Mellanox started dropping samples > > after 100 MSPS with both channels used. But, I was using DPDK 18.11, > > and UHD 4.0 with the Intel NIC, so that might be the case. > > > > > > Best regards > > > > Berkay SAYGILI > > > You are, to a certain extent comparing apples and oranges. The > "benchmark_rate" example never actually *DOES* anything with the samples. > > Your Gnu Radio example writes them to a file. This is MUCH more > expensive. > > In *general* the cost-per-sample for your typical Gnu Radio application > will be considerably higher than running simple UHD "native" benchmark > programs. > > >
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