Was Intel Holding Back?

By: (0xe2.0x9a.0x9b.delete@this.gmail.com), August 20, 2021 9:52 am
Room: Moderated Discussions
juanrga (nomail.delete@this.juanrga.com) on August 20, 2021 1:53 am wrote:
> Jon (no.delete@this.no.com) on August 19, 2021 7:49 am wrote:
> > I just noticed that Intel had its arch day today.
> >
> >
> > I remember that for years when Broadwell was introduced we had lengthy arguments over that theoretical
> > x86 IPC wall.
> It isn't just theoretical, it is measurable. Just plot IPC
> vs year since the first x86 chips and see for yourself.

How does the x86-IPC-wall theory account for increases in the number (2 and more) of branches predicted per cycle?

On x86/etc, which doesn't have an addressable register file (e.g: ADDQ (REGFILE,%rax), %rbx), branches per cycle has a correlation with the number of loads&stores per cycle.

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TopicPosted ByDate
Was Intel Holding Back?Jon2021/08/19 07:49 AM
  Was Intel Holding Back?Adrian2021/08/19 08:34 AM
  Was Intel Holding Back?dmcq2021/08/19 11:36 AM
    Was Intel Holding Back?me2021/08/19 12:03 PM
      Was Intel Holding Back?Groo2021/08/19 04:46 PM
  Was Intel Holding Back?2021/08/19 11:37 AM
  Was Intel Holding Back?James2021/08/19 03:52 PM
  Was Intel Holding Back?juanrga2021/08/20 01:53 AM
    Was Intel Holding Back?2021/08/20 09:52 AM
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