[USRP-users] Re: DPDK drops samples at low rates

On 2022-09-06 11:43, per...@o2.pl wrote: Marcus D. Leech wrote: On 2022-09-06 06:56, per...@o2.pl wrote: Hi, Fruits aside, that was a valid question. Cause of bad performance when combining DPDK with GNU Radio is a topic that needs to be addressed.

[USRP-users] Re: DPDK drops samples at low rates

Marcus D. Leech wrote: > On 2022-09-06 06:56, per...@o2.pl wrote: > > > Hi, > > > > Fruits aside, that was a valid question. Cause of bad performance when > > combining DPDK with GNU Radio is a topic that needs to be addressed. > > > > My hypothesis regarding the cause was: > > > > DPDK needs few

[USRP-users] Re: DPDK drops samples at low rates

On 2022-09-06 06:56, per...@o2.pl wrote: Hi, Fruits aside, that was a valid question. Cause of bad performance when combining DPDK with GNU Radio is a topic that needs to be addressed. My hypothesis regarding the cause was: DPDK needs few processor cores for itself only. GNU Radio runs a lo

[USRP-users] Re: DPDK drops samples at low rates

per...@o2.pl wrote: > Hi, > > Fruits aside, that was a valid question. Cause of bad performance when > combining DPDK with GNU Radio is a topic that needs to be addressed. > > My hypothesis regarding the cause was: > > DPDK needs few processor cores for itself only. GNU Radio runs a lot of > thr

[USRP-users] Re: DPDK drops samples at low rates

Hi, Fruits aside, that was a valid question. Cause of bad performance when combining DPDK with GNU Radio is a topic that needs to be addressed. My hypothesis regarding the cause was: DPDK needs few processor cores for itself only. GNU Radio runs a lot of thread (one thread per block +) and it

[USRP-users] Re: DPDK drops samples at low rates

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 wrote: > On 2022-06-22 09:05, Berkay SAYGILI wrote: > > > > Now, I see that DPDK works fine with given UHD examples. But, i

[USRP-users] Re: DPDK drops samples at low rates

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 tra

[USRP-users] Re: DPDK drops samples at low rates

On 2021-11-19 10:13, Michael Dickens wrote: It is worth trying a Mellanox 10 GbE NIC. In our recent internal testing with UHD + DPDK + N320/N321, we saw similar issues as Berkay notes, and eventually tracked the issue to the Intel driver. We approached Intel and while they acknowledged the prob

[USRP-users] Re: DPDK drops samples at low rates

lem. >>> >>> >>> >>> I’m still puzzled by DPDK dropping samples at even 25Msps on 2 channels. >>> >>> *@Rob Kossler: do you have any more input on this matter?* >>> >>> >>> >>> Best, >>> >>> Guill

[USRP-users] Re: DPDK drops samples at low rates

e/high-rate sample >> streaming? The provided rx_samples_to_file is not nearly enough. >> >> What’s the preferred way to approach storing samples for maximum >> performance? >> >> >> >> Thank you a lot and best regards, >> >> Guillermo

[USRP-users] Re: DPDK drops samples at low rates

I'm not aware of anyone else doing work at these aggregate rates. The > fact that you are able to *both* "do stuff with the samples" AND write them > to a RAID > array at ~1Gsps is amazing. > > Do all USRPs have to be on the same computer for your application? Are > there

[USRP-users] Re: DPDK drops samples at low rates

November 2021 16:51 *Para:* Guillermo Ortas Delgado ; Rob Kossler *CC:* usrp-users@lists.ettus.com *Asunto:* Re: [USRP-users] Re: DPDK drops samples at low rates On 2021-11-17 04:50, Guillermo Ortas Delgado wrote: Thanks for your message, I already have the mbuf size maxed out to 512 (

[USRP-users] Re: DPDK drops samples at low rates

On 2021-11-17 04:50, Guillermo Ortas Delgado wrote: Thanks for your message, I already have the mbuf size maxed out to 512 (that’s the maximum value it will take). I have noticed that DPDPK v19.11 made great improvements to the BNXT driver. Is there any chance to get UHD running with DPDK 19

[USRP-users] Re: DPDK drops samples at low rates

This page indicates it has some support. On Tue, Nov 16, 2021 at 12:30 PM Marcus D. Leech wrote: > On 2021-11-16 03:11, Guillermo Ortas Delgado wrote: > > No reason, just testing for the maximum supported MTU by DPDK. Any higher > than that will

[USRP-users] Re: DPDK drops samples at low rates

On 2021-11-16 03:11, Guillermo Ortas Delgado wrote: No reason, just testing for the maximum supported MTU by DPDK. Any higher than that will throw an error. Setting the parameter to 9000 doesn’t make any difference wrt to 9600, or even a lower value in my case. Also, I have observed this beh

[USRP-users] Re: DPDK drops samples at low rates

Hi Guillermo, I noticed the line "dpdk_mtu=9600". Normally, this is "dpdk=9000". Is there a reason for this settings change? Rob On Mon, Nov 15, 2021 at 11:07 AM Marcus D. Leech wrote: > On 2021-11-15 08:25, Guillermo Ortas Delgado wrote: > > I will add that for an unknown reason the maximum f

[USRP-users] Re: DPDK drops samples at low rates

Guillermo: I’ve already got queries in to the R&D team. Sent from my iPhone > On Nov 15, 2021, at 12:17 PM, Guillermo Ortas Delgado wrote: > >  > Yep, the config file is at /etc/uhd/uhd.conf and I can see that any > modifications I make on it take immediate effect. > Could you get anyone fr

[USRP-users] Re: DPDK drops samples at low rates

On 2021-11-15 08:25, Guillermo Ortas Delgado wrote: I will add that for an unknown reason the maximum frame size as reported by UHD when launching the benchmark_rate app is 1556, which triggers a warning message saying that it should be 8000 for best results. I cannot find anywhere to set th

[USRP-users] Re: DPDK drops samples at low rates

On 2021-11-15 08:25, Guillermo Ortas Delgado wrote: I will add that for an unknown reason the maximum frame size as reported by UHD when launching the benchmark_rate app is 1556, which triggers a warning message saying that it should be 8000 for best results. I cannot find anywhere to set th