By: Michael S (already5chosen.delete@this.yahoo.com), January 4, 2015 5:21 am
Room: Moderated Discussions
Eric Bron (eric.bron.delete@this.zvisuel.privatefortest.com) on January 4, 2015 4:57 am wrote:
> > I will be very surprised in KNL L2 is shared in any form
>
> I will be surprised that L2 tiles aren't shared as in Aubrey Isle and Knights Corner, this will
> be a mojor regression for codes with a lot of read only data shared by many threads, particularly
> since the memory bandwidth per FLOP will be much lower than with previous solutions
Sharing will seriously compromise L2 latency for the common case, which is probably more important for KNL due to its aspirations to not suck too badly in non-vector single-thread codes.
> > I will be very surprised in KNL L2 is shared in any form
>
> I will be surprised that L2 tiles aren't shared as in Aubrey Isle and Knights Corner, this will
> be a mojor regression for codes with a lot of read only data shared by many threads, particularly
> since the memory bandwidth per FLOP will be much lower than with previous solutions
Sharing will seriously compromise L2 latency for the common case, which is probably more important for KNL due to its aspirations to not suck too badly in non-vector single-thread codes.
