I am interested about how to define 'reasonable' here, how it is got and what what is the 'many case'? is there any document/link to refer this information, please shed me some light.
On Thu, Jun 29, 2017 at 10:47 PM, Darrell Ball <db...@vmware.com> wrote: > Q: “how it is calculated in such an exact number? “ > > A: It is a reasonable number to accommodate many cases. > > Q: “If there are more ports added for polling, for avoid competing can I > increase the 64k size into a > bigger one?” > > A: If a larger number is needed, it may imply that adding another PMD and > dividing the forwarding > work would be best. Maybe even a smaller number of flows may be best > served with more PMDs. > > > > > > On 6/29/17, 7:23 AM, "ovs-discuss-boun...@openvswitch.org on behalf of > Bodireddy, Bhanuprakash" <ovs-discuss-boun...@openvswitch.org on behalf > of bhanuprakash.bodire...@intel.com> wrote: > > > > > >I guess the answer is now the general LLC is 2.5M per core so that > there is 64k > > >flows per thread. > > > > AFAIK, the no. of flows here may not have to do anything with LLC. > Also there is EMC cache(8k entries) of ~4MB per PMD thread. > > > > > > Yes the performance will be nice with simple test cases (P2P with 1 > PMD thread) as most of this fits in to LLC. But in real scenarios OvS-DPDK > can be memory bound. > > > > BTW, on my DUT the LLC is 35MB and has 28 cores and so the assumption > of 2.5M/core isn't right. > > > > - Bhanuprakash. > > > > > > > >On Fri, Jun 23, 2017 at 11:15 AM, Hui Xiang <xiangh...@gmail.com> > wrote: > > >Thanks Darrell, > > > > > >More questions: > > >Why not allocating 64k for each dpcls? does the 64k just fit in L3 > cache or > > >anywhere? how it is calculated in such an exact number? If there are > more > > >ports added for polling, for avoid competing can I increase the 64k > size into a > > >bigger one? Thanks. > > > > > >Hui. > > > > > > > > > > _______________________________________________ > discuss mailing list > disc...@openvswitch.org > https://urldefense.proofpoint.com/v2/url?u=https-3A__mail. > openvswitch.org_mailman_listinfo_ovs-2Ddiscuss&d=DwIGaQ&c= > uilaK90D4TOVoH58JNXRgQ&r=BVhFA09CGX7JQ5Ih-uZnsw&m=- > aL2AdnELLqgfD2paHXevABAGM7lXVTVcc-WMLHqINE&s=pSk0G_pj9n5VvpbG_ > ukDYkjSnSmA9Q9h37XchMZofuU&e= > > >
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