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?Travis03/03/17 06:27 PM
  Is Ryzen 6-wide?Maynard Handley03/03/17 06:50 PM
  AMD describes it as 6 wideVertexMaster03/03/17 11:27 PM
    AMD describes it as 6 wideExophase03/04/17 12:21 PM
      AMD describes it as 6 wideanon03/04/17 12:54 PM
        AMD describes it as 6 wideTravis03/04/17 01:12 PM
          AMD describes it as 6 wideTravis03/04/17 02:05 PM
            AMD describes it as 6 wideExophase03/04/17 05:16 PM
              AMD describes it as 6 wideMichael S03/05/17 10:27 AM
              AMD describes it as 6 wideTravis03/05/17 12:45 PM
                AMD Ryzen inst lat and tputPer Hesselgren03/07/17 12:00 AM
                  AMD Ryzen inst lat and tputTravis03/07/17 01:50 PM
                    AMD Ryzen inst lat and tputGabriele Svelto03/08/17 04:37 AM
                      AMD Ryzen inst lat and tputTravis03/08/17 12:03 PM
                  AMD Ryzen inst lat and tputTravis03/07/17 02:01 PM
                    Sorry, failed to properly close code tag :( (NT)Travis03/07/17 02:02 PM
                    AMD Ryzen inst lat and tputPer Hesselgren03/07/17 02:48 PM
                      AMD Ryzen inst lat and tputTravis03/07/17 03:16 PM
                      AMD Ryzen inst lat and tputPer Hesselgren03/07/17 03:19 PM
                        AMD Ryzen inst lat and tputPer Hesselgren03/18/17 07:50 AM
                          AMD Ryzen inst lat and tputPer Hesselgren03/18/17 08:05 AM
                            AMD Ryzen inst lat and tput-7zipPer Hesselgren03/25/17 03:48 AM
                  FMA tput looks like a mistakeMichael S03/12/17 03:24 AM
                    FMA tput looks like a mistakeGian-Carlo Pascutto03/14/17 01:27 AM
                      FMA tput looks like a mistakeMichael S03/14/17 03:39 AM
                        FMA tput looks like a mistakeGian-Carlo Pascutto03/14/17 07:36 AM
                          FMA tput looks like a mistakeMichael S03/14/17 08:45 AM
                      FMA tput looks like a mistakeEmil Briggs03/14/17 04:24 PM
                        FMA tput looks like a mistakeGian-Carlo Pascutto03/15/17 01:32 AM
        AMD describes it as 6 wideBrett03/04/17 01:39 PM
      AMD describes it as 6 wideTravis03/04/17 01:06 PM
        FP & Int pipelines, AVX-256VertexMaster03/04/17 02:09 PM
          FP & Int pipelines, AVX-256Travis03/04/17 03:26 PM
          No Ryzen BKDG yetg c03/19/17 07:43 AM
            No Ryzen BKDG yetGroo03/20/17 02:02 PM
              No Ryzen BKDG & revision guide yetBrendan03/22/17 12:37 AM
                No Ryzen BKDG & revision guide yetmuziqaz03/22/17 03:26 AM
                No Ryzen BKDG & revision guide yetGroo03/22/17 06:54 AM
                  No Ryzen BKDG & revision guide yetAdrian03/22/17 07:54 AM
                  No Ryzen BKDG & revision guide yetblue03/22/17 07:58 AM
                    FMA3 bug possibly connected to power managementhobold03/22/17 09:14 AM
                      FMA3 bug possibly connected to power managementMatthias Waldhauer03/28/17 07:20 AM
                    No Ryzen BKDG & revision guide yetGroo03/23/17 06:50 AM
                  No Ryzen BKDG & revision guide yetBrendan03/23/17 11:31 PM
                    No Ryzen BKDG & revision guide yetMatthias Waldhauer03/24/17 06:08 PM
        AMD describes it as 6 wideDavid Kanter03/04/17 04:19 PM
          AMD describes it as 6 wide (how to test this?)Domaldel03/22/17 09:58 AM
            AMD describes it as 6 wide (how to test this?)Travis03/22/17 03:17 PM
              AMD describes it as 6 wide (how to test this?)Domaldel03/23/17 12:49 AM
        AMD describes it as 6 wideanon03/04/17 05:16 PM
          AMD describes it as 6 wideTravis03/05/17 12:55 PM
            AMD describes it as 6 wideDavid Kanter03/05/17 06:31 PM
              AMD describes it as 6 wideTravis03/05/17 07:23 PM
                AMD describes it as 6 wideDavid Kanter03/05/17 10:00 PM
                  AMD describes it as 6 wideTravis03/06/17 11:15 AM
                    AMD describes it as 6 wideRobert David Graham03/06/17 11:53 AM
                      AMD describes it as 6 wideTravis03/06/17 04:09 PM
                    AMD describes it as 6 wideTIm McCaffrey03/06/17 02:56 PM
                  AMD describes it as 6 wideDomaldel03/08/17 04:36 PM
                1800x system availablemuziqaz03/13/17 09:22 AM
                  1800x system availablePer Hesselgren03/16/17 03:14 AM
                    1800x system availablemuziqaz03/17/17 03:53 AM
                      1800x system availableAdrian03/17/17 07:25 AM
                        1800x system availableAdrian03/17/17 08:00 AM
                          1800x system availablemuziqaz03/17/17 11:48 AM
                          1800x system availablemuziqaz03/17/17 01:42 PM
                            1800x system availableAdrian03/17/17 02:42 PM
                              1800x system availablemuziqaz03/17/17 03:07 PM
                                1800x system availableAdrian03/17/17 03:18 PM
                            1800x system availableAdrian03/17/17 03:07 PM
                            1800x system availableDomaldel03/18/17 06:40 AM
                              1800x system availablemuziqaz03/18/17 06:54 AM
                                1800x system availablemuziqaz03/18/17 02:28 PM
                                  1800x system availablePer Hesselgren03/21/17 12:30 AM
                                    1800x system availablePer Hesselgren03/21/17 02:58 AM
                                    1800x system availableGian-Carlo Pascutto03/21/17 12:25 PM
                                      1800x system availableMichael_S03/21/17 02:24 PM
                                        1800x system availableGian-Carlo Pascutto03/21/17 02:56 PM
                                          1800x system availableMichael S03/21/17 03:36 PM
                                            done (NT)Michael S03/22/17 03:59 AM
                                      1800x system availableanonymou503/21/17 03:27 PM
                                        1800x system availableWilco03/22/17 06:17 PM
                                          1800x system availableDomaldel03/23/17 12:52 AM
                                          1800x system availableanonymou503/23/17 12:24 PM
                                    1800x system availablemuziqaz03/22/17 03:25 AM
                                      1800x system availablemuziqaz03/24/17 03:24 AM
                              1800x system availableAdrian03/18/17 08:36 AM
                    1800x system availablePer Hesselgren03/17/17 08:49 AM
                      1800x system available-16TPer Hesselgren03/17/17 01:10 PM
                      1800x system availableMichael S03/18/17 10:21 AM
                        1800x system availablePer Hesselgren03/19/17 03:06 AM
                          better test desired. This one is not pushing FPU to the limitsMichael S03/19/17 04:28 AM
                            better test desired. This one is not pushing FPU to the limitsPer Hesselgren03/19/17 08:49 AM
                              better test desired. This one is not pushing FPU to the limitsPer Hesselgren03/19/17 10:47 AM
                                better test desired. This one is not pushing FPU to the limitsMichael S03/19/17 11:45 AM
                                  better test desired. This one is not pushing FPU to the limitsMichael S03/19/17 11:47 AM
        AMD describes it as 6 widePoindexter03/05/17 07:55 PM
          AMD describes it as 6 wideTravis03/05/17 08:05 PM
            AMD describes it as 6 wideDavid Kanter03/05/17 10:03 PM
              AMD describes it as 6 wideTravis03/06/17 11:19 AM
                AMD describes it as 6 widePoindexter03/07/17 08:54 AM
                  AMD describes it as 6 wideTravis03/07/17 01:54 PM
                  AMD describes it as 6 wideanon03/08/17 04:19 AM
                    AMD describes it as 6 wideTravis03/08/17 12:35 PM
                      AMD describes it as 6 wideanon03/08/17 02:48 PM
                        AMD describes it as 6 wideTravis03/09/17 12:02 PM
                          AMD describes it as 6 wideanon03/09/17 05:44 PM
                            AMD describes it as 6 wideanon03/12/17 08:28 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell green?