High res SKL-SP die shot

By: David Kanter (dkanter.delete@this.realworldtech.com), May 23, 2020 7:57 pm
Room: Moderated Discussions
none (none.delete@this.none.com) on May 23, 2020 3:15 pm wrote:
> Doug S (foo.delete@this.bar.bar) on May 22, 2020 11:09 am wrote:
> > none (none.delete@this.none.com) on May 22, 2020 3:39 am wrote:
> > > Just looking at the picture the L2 labelled part is less than 8 times larger than the L1 one.
> > > Isn’t Skylake SP 32KB L1 and 1024KB L2? If so is L2 really more than 4 times denser than L1?
> > > Or is the die shot incomplete? Or did I miss something else?
> >
> >
> > It isn't just the number of KB, it also depends on the associativity, tags, amount of read/write I/Os
> > for each and so forth. I would expect an L2 to be denser than L1, and an L3 to be denser still.
>
> Yes, I guess L1 is multi ported (or any other optim to increase bandwidth) which would
> increase area a lot. I couldn’t find data about the impact on area of multi porting or
> multi banking, if anyone know more about it :)

The L1D uses register file cells (8T) that are much less dense than the L2 and L3.

> L2 and L3 seem to have similar densities.

It's possible, although I suspect the L2 would be optimized for low voltage and a little less dense.

David
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TopicPosted ByDate
High res SKL-SP die shotTravis Downs2020/04/27 04:19 PM
  High res SKL-SP die shotanonymou52020/04/27 11:15 PM
    Huh?Huh2020/05/22 10:12 PM
      Huh?Freedy2020/05/24 07:43 AM
        Huh?anonymou52020/05/24 12:40 PM
  High res SKL-SP die shotChester2020/05/01 05:13 PM
    High res SKL-SP die shotanon person2020/05/01 10:44 PM
    High res SKL-SP die shotanon2020/05/02 09:11 AM
      High res SKL-SP die shotanonymou52020/05/02 03:17 PM
        High res SKL-SP die shotwumpus2020/05/03 06:53 AM
    High res SKL-SP die shotTravis Downs2020/05/21 08:28 PM
      High res SKL-SP die shotBrett2020/05/22 12:41 AM
        High res SKL-SP die shotChester2020/05/22 12:25 PM
          High res SKL-SP die shotBrett2020/05/22 01:34 PM
      High res SKL-SP die shotnone2020/05/22 02:39 AM
        High res SKL-SP die shotDoug S2020/05/22 10:09 AM
          High res SKL-SP die shotChester2020/05/22 12:06 PM
          High res SKL-SP die shotnone2020/05/23 02:15 PM
            High res SKL-SP die shotDavid Kanter2020/05/23 07:57 PM
      High res SKL-SP die shotChester2020/05/22 12:01 PM
  High res SKL-SP die shotTravis Downs2020/05/03 12:01 PM
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