Hi Damjan, VFIO map function now can be called from work thread in some cases. Like allocate physical memory for DMA batch and then do mapping for if no attached device, or a new session segment attached to VPP process. So I use event-logger for vfio logging. These numbers are collected from my sample server, we are modifying CSTI case for DMA usage. Will see more official number later.
1C memif l2patch No-DMA 64 128 256 512 1024 1518 8.00Mpps 6.49Mpps 4.69Mpps 3.23Mpps 2.37Mpps 1.96Mpps 4.09Gbps 6.65Gbps 9.62Gbps 13.24Gbps 19.43Gbps 23.86Gbps 1C memif l2patch DMA 64 128 256 512 1024 1518 8.65Mpps 8.60Mpps 8.54Mpps 8.22Mpps 8.36Mpps 7.61Mpps 4.43Gbps 8.81Gbps 8.54Mpps 33.67Gbps 68.51Gbps 92.39Gbps Regards, Marvin > -----Original Message----- > From: Damjan Marion <dmar...@0xa5.net> > Sent: Tuesday, November 29, 2022 10:45 PM > To: Liu, Yong <yong....@intel.com> > Cc: vpp-dev@lists.fd.io > Subject: Re: Gerrit review for memif DMA acceleration > > > Hi Marvin, > > for a start can you use standard vlib logging instead of elog, as all those > logging stiuff are not perf critical. > > Also, can you share some perf comparison between standard CPU path and > DSA accelerated memif? > > Thanks, > > Damjan > > > > On 29.11.2022., at 09:05, Liu, Yong <yong....@intel.com> wrote: > > > > Hi Damjan and community, > > For extend the usage of latest introduced DMA infrastructure, I uploaded > several patches for review. Before your review, let me briefly introduce > these patches. > > In review 37572, add a new vfio mapped function for extended memory. > This kind of memory may come from another process like memif regions or > dynamic allocated like hoststack shared segments. > > In review 37573, support vfio based DSA device for the scenario that need > fully control the resource of DSA. Compared to assign work queues from > single idxd instance into multiple processes, this way can guarantee > resource. > > In review 37574, support CBDMA device which only support pci device > model. The usage of CBDMA in hoststack and memif is depend on 37572. > > In review 37572, add new datapath function in memif input and tx node. > These functions followed async model and will be chosen if option “use_dma” > added when creating memif interface. > > Gerrit link: > > https://gerrit.fd.io/r/c/vpp/+/37572 > > https://gerrit.fd.io/r/c/vpp/+/37573 > > https://gerrit.fd.io/r/c/vpp/+/37574 > > https://gerrit.fd.io/r/c/vpp/+/37731 > > Best Regards, > > Marvin >
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