One more thing - Please open a bug regarding the num_sge limitation at: https://bugs.openfabrics.org/
Thanks, Amir On 04/14/2010 05:31 PM, Amir Vadai wrote: > Hi, > > FMR are being used only in a special mode called ZCopy. > > You could disable this mode by setting the module paramter > sdp_zcopy_thresh to 0, or by issuing: > # echo 0 > /sys/module/ib_sdp/parameters/sdp_zcopy_thresh > > This means that you won't get the benefits of Zero-copy. > > - Amir > > On 04/14/2010 11:51 AM, Andrea Gozzelino wrote: > >> On Apr 13, 2010 10:22 PM, "Tung, Chien Tin" <chien.tin.t...@intel.com> >> wrote: >> >> >> >>>>>> Chien, does the NE020 support FMRs? I looked at the nes ofed-1.5 >>>>>> code >>>>>> and it appears to do nothing in the map_phys_fmr functions. >>>>>> >>>>>> >>>>>> >>>>> We never implemented map_phys_fmr. Is it relevant to the # of SGEs? >>>>> >>>>> >>>>> >>>> No, but SDP uses FMRs. I don't think it will run without FMR support. >>>> >>>> >>>> >>> Good to know. Thanks. >>> >>> Chien >>> >>> >>> >>> >> Hi Steve and Chien, >> >> I understand that NE020 cards have problem with SDP connected with >> map_phy_fmr (FMR stands for Fast Memory Region). >> Is it possible to solve/fix this point? >> If yes, have you an idea about the time that is necessary to code >> development/build? >> If no, can you suggest me a card that supports SDP protocol? >> >> I work on NE020 cards from February 2010 for an INFN experimental >> proposal, called REDIGO (Read out at 10 Gbits/s), about the data >> acquisition and movement systems. The covergence of storage protocols >> around 10 Gigabits/s Ethernet protocols shows that one way could be the >> Remote Direct Memory Access (RDMA). The goals are the investigations of >> latency time, the throughput, the buffer size schemes and finally the >> global event building bandwidth. >> >> Do you know if NE020 cards have problems with librdma (RDMA procedures, >> in general) and / or with MPI versions? >> >> Thank you very much, >> Andrea >> >> Andrea Gozzelino >> >> INFN - Laboratori Nazionali di Legnaro (LNL) >> Viale dell'Universita' 2 >> I-35020 - Legnaro (PD)- ITALIA >> Tel: +39 049 8068346 >> Fax: +39 049 641925 >> Mail: andrea.gozzel...@lnl.infn.it >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
