ok - actually I used it in an early version of SDP before changing to FMR...
- Amir On 04/14/2010 06:08 PM, Steve Wise wrote: > Amir Vadai wrote: > >> You are right - I missed it. >> >> Andrea, Please open a bug at bugzilla (https://bugs.openfabrics.org) - >> so that you will be notified as soon as I will fix SDP not use FMR if >> not supported. >> >> As to fastreg_mrs support - I don't know this mechanism. Do you mean FRWR? >> >> >> > ib_alloc_fast_reg_mr(), ib_alloc_fast_reg_page_list() and friends, plus > the IB_WR_FAST_REG_MR work request. > > > >> Thanks, >> Amir >> >> >> On 04/14/2010 05:54 PM, Steve Wise wrote: >> >> >>> Hey Amir, >>> >>> I don't think this helps because sdp_add_device() will not add rdma >>> devices that fail to create fmr pools. >>> >>> So I guess you could key off of fmr pool failures and set >>> sdp_zcopy_thresh to 0 and allow the device to be used? >>> >>> But what we really need is sdp support for fastreg_mrs as an >>> alternative to fmrs. >>> >>> >>> Steve. >>> >>> >>> 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-kernel" in >>>> the body of a message to majord...@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> Please read the FAQ at http://www.tux.org/lkml/ >>>> >>>> >>>> >>>> >>> >>> >>> > > -- 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