1800x system available

By: Adrian (a.delete@this.acm.org), March 18, 2017 8:36 am
Room: Moderated Discussions
Domaldel (luredreier.delete@this.gmail.com) on March 18, 2017 6:40 am wrote:
>
> Well, here's some tests done on phoronix showing the impact of different compiler flags on Ryzen:
> http://www.phoronix.com/scan.php?page=article&item=amd-ryzen-znver1&num=1


Unfortunately those tests are pretty much useless.

Comparing znver1 with bdver4 does not give any useful information. The znver1 optimizer was copied from bdver4, so at the initial moment they were identical. Then changes were done, but since the work is far from finished, many regressions are expected.


The useful comparison would have been between -march=znver1 and -march=haswell or -march=broadwell or -march=skylake.

In most cases it is impossible to use -march=bdver4 or any other older AMD architecture for Zen because it is very likely that the compiled program will be aborted on Zen due to illegal instruction exceptions.


On the other hand, Zen implements all Skylake instructions (at least all that are used by GCC) with the exception of the Intel Transactional Synchronization Extensions.

Therefore you can use any Intel -march= options without problems and it is very likely that the speed will be higher than with the immature -march=znver1.





< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Is Ryzen 6-wide?Travis2017/03/03 06:27 PM
  Is Ryzen 6-wide?Maynard Handley2017/03/03 06:50 PM
  AMD describes it as 6 wideVertexMaster2017/03/03 11:27 PM
    AMD describes it as 6 wideExophase2017/03/04 12:21 PM
      AMD describes it as 6 wideanon2017/03/04 12:54 PM
        AMD describes it as 6 wideTravis2017/03/04 01:12 PM
          AMD describes it as 6 wideTravis2017/03/04 02:05 PM
            AMD describes it as 6 wideExophase2017/03/04 05:16 PM
              AMD describes it as 6 wideMichael S2017/03/05 10:27 AM
              AMD describes it as 6 wideTravis2017/03/05 12:45 PM
                AMD Ryzen inst lat and tputPer Hesselgren2017/03/07 12:00 AM
                  AMD Ryzen inst lat and tputTravis2017/03/07 01:50 PM
                    AMD Ryzen inst lat and tputGabriele Svelto2017/03/08 04:37 AM
                      AMD Ryzen inst lat and tputTravis2017/03/08 12:03 PM
                  AMD Ryzen inst lat and tputTravis2017/03/07 02:01 PM
                    Sorry, failed to properly close code tag :( (NT)Travis2017/03/07 02:02 PM
                    AMD Ryzen inst lat and tputPer Hesselgren2017/03/07 02:48 PM
                      AMD Ryzen inst lat and tputTravis2017/03/07 03:16 PM
                      AMD Ryzen inst lat and tputPer Hesselgren2017/03/07 03:19 PM
                        AMD Ryzen inst lat and tputPer Hesselgren2017/03/18 07:50 AM
                          AMD Ryzen inst lat and tputPer Hesselgren2017/03/18 08:05 AM
                            AMD Ryzen inst lat and tput-7zipPer Hesselgren2017/03/25 03:48 AM
                  FMA tput looks like a mistakeMichael S2017/03/12 03:24 AM
                    FMA tput looks like a mistakeGian-Carlo Pascutto2017/03/14 01:27 AM
                      FMA tput looks like a mistakeMichael S2017/03/14 03:39 AM
                        FMA tput looks like a mistakeGian-Carlo Pascutto2017/03/14 07:36 AM
                          FMA tput looks like a mistakeMichael S2017/03/14 08:45 AM
                      FMA tput looks like a mistakeEmil Briggs2017/03/14 04:24 PM
                        FMA tput looks like a mistakeGian-Carlo Pascutto2017/03/15 01:32 AM
        AMD describes it as 6 wideBrett2017/03/04 01:39 PM
      AMD describes it as 6 wideTravis2017/03/04 01:06 PM
        FP & Int pipelines, AVX-256VertexMaster2017/03/04 02:09 PM
          FP & Int pipelines, AVX-256Travis2017/03/04 03:26 PM
          No Ryzen BKDG yetg c2017/03/19 07:43 AM
            No Ryzen BKDG yetGroo2017/03/20 02:02 PM
              No Ryzen BKDG & revision guide yetBrendan2017/03/22 12:37 AM
                No Ryzen BKDG & revision guide yetmuziqaz2017/03/22 03:26 AM
                No Ryzen BKDG & revision guide yetGroo2017/03/22 06:54 AM
                  No Ryzen BKDG & revision guide yetAdrian2017/03/22 07:54 AM
                  No Ryzen BKDG & revision guide yetblue2017/03/22 07:58 AM
                    FMA3 bug possibly connected to power managementhobold2017/03/22 09:14 AM
                      FMA3 bug possibly connected to power managementMatthias Waldhauer2017/03/28 07:20 AM
                        FMA3 bug only in WindowsPer Hesselgren2017/04/05 06:29 AM
                    No Ryzen BKDG & revision guide yetGroo2017/03/23 06:50 AM
                  No Ryzen BKDG & revision guide yetBrendan2017/03/23 11:31 PM
                    No Ryzen BKDG & revision guide yetMatthias Waldhauer2017/03/24 06:08 PM
        AMD describes it as 6 wideDavid Kanter2017/03/04 04:19 PM
          AMD describes it as 6 wide (how to test this?)Domaldel2017/03/22 09:58 AM
            AMD describes it as 6 wide (how to test this?)Travis2017/03/22 03:17 PM
              AMD describes it as 6 wide (how to test this?)Domaldel2017/03/23 12:49 AM
        AMD describes it as 6 wideanon2017/03/04 05:16 PM
          AMD describes it as 6 wideTravis2017/03/05 12:55 PM
            AMD describes it as 6 wideDavid Kanter2017/03/05 06:31 PM
              AMD describes it as 6 wideTravis2017/03/05 07:23 PM
                AMD describes it as 6 wideDavid Kanter2017/03/05 10:00 PM
                  AMD describes it as 6 wideTravis2017/03/06 11:15 AM
                    AMD describes it as 6 wideRobert David Graham2017/03/06 11:53 AM
                      AMD describes it as 6 wideTravis2017/03/06 04:09 PM
                    AMD describes it as 6 wideTIm McCaffrey2017/03/06 02:56 PM
                  AMD describes it as 6 wideDomaldel2017/03/08 04:36 PM
                1800x system availablemuziqaz2017/03/13 09:22 AM
                  1800x system availablePer Hesselgren2017/03/16 03:14 AM
                    1800x system availablemuziqaz2017/03/17 03:53 AM
                      1800x system availableAdrian2017/03/17 07:25 AM
                        1800x system availableAdrian2017/03/17 08:00 AM
                          1800x system availablemuziqaz2017/03/17 11:48 AM
                          1800x system availablemuziqaz2017/03/17 01:42 PM
                            1800x system availableAdrian2017/03/17 02:42 PM
                              1800x system availablemuziqaz2017/03/17 03:07 PM
                                1800x system availableAdrian2017/03/17 03:18 PM
                            1800x system availableAdrian2017/03/17 03:07 PM
                            1800x system availableDomaldel2017/03/18 06:40 AM
                              1800x system availablemuziqaz2017/03/18 06:54 AM
                                1800x system availablemuziqaz2017/03/18 02:28 PM
                                  1800x system availablePer Hesselgren2017/03/21 12:30 AM
                                    1800x system availablePer Hesselgren2017/03/21 02:58 AM
                                    1800x system availableGian-Carlo Pascutto2017/03/21 12:25 PM
                                      1800x system availableMichael_S2017/03/21 02:24 PM
                                        1800x system availableGian-Carlo Pascutto2017/03/21 02:56 PM
                                          1800x system availableMichael S2017/03/21 03:36 PM
                                            done (NT)Michael S2017/03/22 03:59 AM
                                      1800x system availableanonymou52017/03/21 03:27 PM
                                        1800x system availableWilco2017/03/22 06:17 PM
                                          1800x system availableDomaldel2017/03/23 12:52 AM
                                          1800x system availableanonymou52017/03/23 12:24 PM
                                            1800x system availableKlimax2017/04/03 01:35 AM
                                    1800x system availablemuziqaz2017/03/22 03:25 AM
                                      1800x system availablemuziqaz2017/03/24 03:24 AM
                              1800x system availableAdrian2017/03/18 08:36 AM
                    1800x system availablePer Hesselgren2017/03/17 08:49 AM
                      1800x system available-16TPer Hesselgren2017/03/17 01:10 PM
                      1800x system availableMichael S2017/03/18 10:21 AM
                        1800x system availablePer Hesselgren2017/03/19 03:06 AM
                          better test desired. This one is not pushing FPU to the limitsMichael S2017/03/19 04:28 AM
                            better test desired. This one is not pushing FPU to the limitsPer Hesselgren2017/03/19 08:49 AM
                              better test desired. This one is not pushing FPU to the limitsPer Hesselgren2017/03/19 10:47 AM
                                better test desired. This one is not pushing FPU to the limitsMichael S2017/03/19 11:45 AM
                                  better test desired. This one is not pushing FPU to the limitsMichael S2017/03/19 11:47 AM
        AMD describes it as 6 widePoindexter2017/03/05 07:55 PM
          AMD describes it as 6 wideTravis2017/03/05 08:05 PM
            AMD describes it as 6 wideDavid Kanter2017/03/05 10:03 PM
              AMD describes it as 6 wideTravis2017/03/06 11:19 AM
                AMD describes it as 6 widePoindexter2017/03/07 08:54 AM
                  AMD describes it as 6 wideTravis2017/03/07 01:54 PM
                  AMD describes it as 6 wideanon2017/03/08 04:19 AM
                    AMD describes it as 6 wideTravis2017/03/08 12:35 PM
                      AMD describes it as 6 wideanon2017/03/08 02:48 PM
                        AMD describes it as 6 wideTravis2017/03/09 12:02 PM
                          AMD describes it as 6 wideanon2017/03/09 05:44 PM
                            AMD describes it as 6 wideanon2017/03/12 08:28 AM
                            AMD describes it as 6 wideTravis2017/06/20 04:48 PM
                              AMD describes it as 6 wideAdrian2017/06/21 07:48 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell green?