Re: maximum ipv4 bgp prefix length of /24 ?

[Tom Beecher <beecher () beecher cc>]

> > 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 <saku () ytti fi> wrote:

> On Fri, 29 Sept 2023 at 08:24, William Herrin <bill () 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