> > > Maybe. That's where my comment about CPU cache starvation comes into > > play. I haven't delved into the Juniper line cards recently so I could > > easily be wrong, but if the number of routes being actively used > > pushes past the CPU data cache, the cache miss rate will go way up and > > it'll start thrashing main memory. The net result is that the > > achievable PPS drops by at least an order of magnitude. > > When you say, you've not delved into the Juniper line cards recently, > to which specific Juniper linecard your comment applies to? >
Excellent question..... On Fri, Sep 29, 2023 at 1:30 AM Saku Ytti <s...@ytti.fi> wrote: > On Fri, 29 Sept 2023 at 08:24, William Herrin <b...@herrin.us> wrote: > > > Maybe. That's where my comment about CPU cache starvation comes into > > play. I haven't delved into the Juniper line cards recently so I could > > easily be wrong, but if the number of routes being actively used > > pushes past the CPU data cache, the cache miss rate will go way up and > > it'll start thrashing main memory. The net result is that the > > achievable PPS drops by at least an order of magnitude. > > When you say, you've not delved into the Juniper line cards recently, > to which specific Juniper linecard your comment applies to? > > -- > ++ytti >
