Re: [lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
Hi Matias, This PR 731 fixed the issue. Thanks a lot. Regards, P Gyanesh Kumar Patra On Thu, Oct 18, 2018 at 4:40 AM Elo, Matias (Nokia - FI/Espoo) < matias@nokia.com> wrote: > Thanks! I think I figured out the problem. Some DPDK NICs require that the > buffer length is at least 2kB + headroom to not segment standard ethernet > frames. This PR should fix the issue: > https://github.com/Linaro/odp/pull/731 . Please let me know if this fixed > your problem. > > -Matias > >
Re: [lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
Hi Gyanesh, Could you please provide some additional information about your system (ODP & DPDK versions, NICs)? I’m using DPDK (v17.11.4) zero-copy pktio with the latest ODP master branch code and I’m unable to reproduce this issue. Regards, Matias > On 16 Oct 2018, at 23:44, gyanesh patra wrote: > > Hi Maxim, > Increasing the POOL_SEG_LEN worked. But i am not sure how to calculate the > necessary value to use? > I was using the values from the odp_l2fwd example before. But now i > required to increase it upto 2200 for it to work. > Is there any guideline how to calculate this value? And also does it have > any impact on performance? > > Regarding the examples, i tried with odp_l2fwd_simple and odp_switch and > faced the same problem. But in my case "odp_l2fwd" example never recieves > any packets. Hence i have not been able to test that. If you can give any > input regarding this, it will be helpful too. > Thanks for your help. > > Regards, > P Gyanesh Kumar Patra > > > On Tue, Oct 16, 2018 at 3:36 PM Maxim Uvarov > wrote: > >> DPDK as ODP can have packets which are not in physacally continius memory. >> I.e. packet can be split on several memory segments. That is not supported >> by current code and you have this warning. I think that we have dpdk pkio >> validation test and it works with large packets. But to do that you need to >> be sure that you created pool with right parameters. In your case >> POOL_SEG_LEN has to be increased. >> >> Also you can try more featured example: ./test/performance/odp_l2fwd >> >> Best Regards, >> Maxim. >> >> >> On Tue, 16 Oct 2018 at 20:49, gyanesh patra >> wrote: >> >>> Hi, >>> I am facing problem while using ODP master branch with DPDK pktio & >>> zero-pkt-copy as below: >>> >>> ODP/bin/# ./odp_l2fwd_simple ./odp_l2fwd_simple >>> >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> >>> This error is present for dpdk pktio only. It appears with larger packet >>> sizes like 1518bytes, 1280bytes. But everything works fine with 1024bytes >>> and smaller packets. >>> >>> I have verified that the packets have IP-don't fragment flag set. And >>> Wireshark doesn't show any abnormality with the pcap. >>> Is it broken or we need to specify some extra flags? >>> >>> I am on: >>> commit 570758a22fd0d6e2b2a73eb8ed0a8360a5b0ef32 >>> Author: Matias Elo >>> Date: Tue Oct 2 14:13:35 2018 +0300 >>> linux-gen: ring: allocate global data from shm >>> >>> >>> Thanks, >>> P Gyanesh Kumar Patra >>> >>
Re: [lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
9000 is maximum size for large packets. 1500 is standard packet size. Plus if you network wraps original ip packets to some tunnel that size (1500) can be increased. On Tue, 16 Oct 2018 at 23:45, gyanesh patra wrote: > Hi Maxim, > Increasing the POOL_SEG_LEN worked. But i am not sure how to calculate the > necessary value to use? > I was using the values from the odp_l2fwd example before. But now i > required to increase it upto 2200 for it to work. > Is there any guideline how to calculate this value? And also does it have > any impact on performance? > > Regarding the examples, i tried with odp_l2fwd_simple and odp_switch and > faced the same problem. But in my case "odp_l2fwd" example never recieves > any packets. Hence i have not been able to test that. If you can give any > input regarding this, it will be helpful too. > Thanks for your help. > > Regards, > P Gyanesh Kumar Patra > > > On Tue, Oct 16, 2018 at 3:36 PM Maxim Uvarov > wrote: > >> DPDK as ODP can have packets which are not in physacally continius >> memory. I.e. packet can be split on several memory segments. That is not >> supported by current code and you have this warning. I think that we have >> dpdk pkio validation test and it works with large packets. But to do that >> you need to be sure that you created pool with right parameters. In your >> case POOL_SEG_LEN has to be increased. >> >> Also you can try more featured example: ./test/performance/odp_l2fwd >> >> Best Regards, >> Maxim. >> >> >> On Tue, 16 Oct 2018 at 20:49, gyanesh patra >> wrote: >> >>> Hi, >>> I am facing problem while using ODP master branch with DPDK pktio & >>> zero-pkt-copy as below: >>> >>> ODP/bin/# ./odp_l2fwd_simple ./odp_l2fwd_simple >>> >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >>> >>> This error is present for dpdk pktio only. It appears with larger packet >>> sizes like 1518bytes, 1280bytes. But everything works fine with 1024bytes >>> and smaller packets. >>> >>> I have verified that the packets have IP-don't fragment flag set. And >>> Wireshark doesn't show any abnormality with the pcap. >>> Is it broken or we need to specify some extra flags? >>> >>> I am on: >>> commit 570758a22fd0d6e2b2a73eb8ed0a8360a5b0ef32 >>> Author: Matias Elo >>> Date: Tue Oct 2 14:13:35 2018 +0300 >>>linux-gen: ring: allocate global data from shm >>> >>> >>> Thanks, >>> P Gyanesh Kumar Patra >>> >>
Re: [lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
Hi Maxim, Increasing the POOL_SEG_LEN worked. But i am not sure how to calculate the necessary value to use? I was using the values from the odp_l2fwd example before. But now i required to increase it upto 2200 for it to work. Is there any guideline how to calculate this value? And also does it have any impact on performance? Regarding the examples, i tried with odp_l2fwd_simple and odp_switch and faced the same problem. But in my case "odp_l2fwd" example never recieves any packets. Hence i have not been able to test that. If you can give any input regarding this, it will be helpful too. Thanks for your help. Regards, P Gyanesh Kumar Patra On Tue, Oct 16, 2018 at 3:36 PM Maxim Uvarov wrote: > DPDK as ODP can have packets which are not in physacally continius memory. > I.e. packet can be split on several memory segments. That is not supported > by current code and you have this warning. I think that we have dpdk pkio > validation test and it works with large packets. But to do that you need to > be sure that you created pool with right parameters. In your case > POOL_SEG_LEN has to be increased. > > Also you can try more featured example: ./test/performance/odp_l2fwd > > Best Regards, > Maxim. > > > On Tue, 16 Oct 2018 at 20:49, gyanesh patra > wrote: > >> Hi, >> I am facing problem while using ODP master branch with DPDK pktio & >> zero-pkt-copy as below: >> >> ODP/bin/# ./odp_l2fwd_simple ./odp_l2fwd_simple >> >> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >> pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported >> >> This error is present for dpdk pktio only. It appears with larger packet >> sizes like 1518bytes, 1280bytes. But everything works fine with 1024bytes >> and smaller packets. >> >> I have verified that the packets have IP-don't fragment flag set. And >> Wireshark doesn't show any abnormality with the pcap. >> Is it broken or we need to specify some extra flags? >> >> I am on: >> commit 570758a22fd0d6e2b2a73eb8ed0a8360a5b0ef32 >> Author: Matias Elo >> Date: Tue Oct 2 14:13:35 2018 +0300 >>linux-gen: ring: allocate global data from shm >> >> >> Thanks, >> P Gyanesh Kumar Patra >> >
Re: [lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
DPDK as ODP can have packets which are not in physacally continius memory. I.e. packet can be split on several memory segments. That is not supported by current code and you have this warning. I think that we have dpdk pkio validation test and it works with large packets. But to do that you need to be sure that you created pool with right parameters. In your case POOL_SEG_LEN has to be increased. Also you can try more featured example: ./test/performance/odp_l2fwd Best Regards, Maxim. On Tue, 16 Oct 2018 at 20:49, gyanesh patra wrote: > Hi, > I am facing problem while using ODP master branch with DPDK pktio & > zero-pkt-copy as below: > > ODP/bin/# ./odp_l2fwd_simple ./odp_l2fwd_simple > > pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported > pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported > pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported > pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported > > This error is present for dpdk pktio only. It appears with larger packet > sizes like 1518bytes, 1280bytes. But everything works fine with 1024bytes > and smaller packets. > > I have verified that the packets have IP-don't fragment flag set. And > Wireshark doesn't show any abnormality with the pcap. > Is it broken or we need to specify some extra flags? > > I am on: > commit 570758a22fd0d6e2b2a73eb8ed0a8360a5b0ef32 > Author: Matias Elo > Date: Tue Oct 2 14:13:35 2018 +0300 >linux-gen: ring: allocate global data from shm > > > Thanks, > P Gyanesh Kumar Patra >
[lng-odp] odp with dpdk pktio gives error with larger packets - 'Segmented buffers not supported'
Hi, I am facing problem while using ODP master branch with DPDK pktio & zero-pkt-copy as below: ODP/bin/# ./odp_l2fwd_simple ./odp_l2fwd_simple pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported pktio/dpdk.c:851:mbuf_to_pkt_zero():Segmented buffers not supported This error is present for dpdk pktio only. It appears with larger packet sizes like 1518bytes, 1280bytes. But everything works fine with 1024bytes and smaller packets. I have verified that the packets have IP-don't fragment flag set. And Wireshark doesn't show any abnormality with the pcap. Is it broken or we need to specify some extra flags? I am on: commit 570758a22fd0d6e2b2a73eb8ed0a8360a5b0ef32 Author: Matias Elo Date: Tue Oct 2 14:13:35 2018 +0300 linux-gen: ring: allocate global data from shm Thanks, P Gyanesh Kumar Patra
