Intel 3rd Gen Xeon Scalable (Ice Lake SP) Review

By: Chester (lamchester.delete@this.gmail.com), April 7, 2021 9:19 am
Room: Moderated Discussions
> > > Well the 8380 is only 10% faster single-threaded because of the large L3.

Good caching is a huge part of CPU microarchitecture, and I give Intel for making a bigger, lower latency L3 than Ampere. So why didn't Altra make a large L3 and catch up in ST perf?

> > Well Intel's process technology has stalled badly for a lot longer than two years so of course it's not
> > great progress. What is more concerning for the ARM fanclub is that AMD does pretty damn well when the
> > process technology is equivalent. Strange, there must be a nasty ARM tax slowing them down to the point
> > where they're not able to take advantage of the huge alleged x86 tax slowing down AMD so much.
>
> I am not sure you understand the concept of x86 tax. It is not about "slowing down", it is about size.
>
> https://www.hpcwire.com/2020/03/17/marvell-talks-up-thunderx3-and-arm-server-roadmap/
>
>
Just to give you an idea, in the previous generation, if you look at ThunderX2, compared to AMD or Skylake,
> for the same process node technology [we get] roughly 20% to 25% smaller die area. That translates into lower
> power. When we move to 7nm with ThunderX3, our core compared to AMD Rome’s 7nm is roughly 30% smaller.


Or maybe, Rome is less dense because the same core goes to desktop and clocks beyond 4 GHz. For some reason, high clocking designs tend to be less dense.

Zen 2 also has 256-bit vector registers, more scheduler entries, twice the L1D bandwidth, and can sustain higher IPC (5 instrs or 6 micro-ops/clk, where ThunderX3 is limited at rename to 4 micro-ops/clk).

ThunderX3 does have a bigger icache and GPR RF, probably because that's needed to handle 4-way SMT. Branch predictor sizes aren't known (and that's a huge part of Zen 2). In any case it's not clear how much, if any, size advantage is attributable to ARM vs x86.

Also ThunderX3 got cancelled, if that says anything about how great it is.
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Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon2021/04/06 10:48 AM
  Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAdrian2021/04/06 12:01 PM
    Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAndrey2021/04/06 01:07 PM
      Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewme2021/04/06 03:03 PM
        Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewWes Felter2021/04/06 03:10 PM
    Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewWilco2021/04/06 02:09 PM
      Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon22021/04/06 03:23 PM
        Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewWilco2021/04/06 05:37 PM
          Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon22021/04/06 05:43 PM
            Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/07 07:36 AM
              Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewChester2021/04/07 09:19 AM
                Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/08 12:15 AM
                  Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAnon2021/04/08 12:48 AM
                    Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/09 03:44 AM
                      Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAnon2021/04/09 10:06 AM
                        Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewWilco2021/04/09 01:39 PM
                        Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/10 07:58 AM
                          Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewChester2021/04/10 12:57 PM
                            Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/11 04:28 AM
                              Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAnon2021/04/11 04:40 AM
                                Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon.12021/04/11 10:03 AM
              Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAnon2021/04/07 10:01 AM
                Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/07 11:50 PM
              Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon22021/04/07 05:17 PM
                Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/07 11:43 PM
                  Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon22021/04/08 01:16 AM
                    Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewnone2021/04/08 01:53 AM
                      Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon22021/04/08 02:08 AM
                        Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewnone2021/04/08 06:47 AM
                          Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewWilco2021/04/08 08:14 AM
                            Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanon.12021/04/08 03:45 PM
                          Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/09 03:20 AM
              Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewRonald Maas2021/04/08 09:25 AM
                Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/09 03:56 AM
                  Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewRonald Maas2021/04/09 09:23 AM
                    Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewjuanrga2021/04/11 04:38 AM
    Intel 3rd Gen Xeon Scalable (Ice Lake SP) Reviewanonymous22021/04/06 04:28 PM
      Intel 3rd Gen Xeon Scalable (Ice Lake SP) ReviewAdrian2021/04/07 12:29 AM
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