Saltwell Outperforming A15...With Less Power!!!

By: Wilco (Wilco.Dijkstra.delete@this.ntlworld.com), July 11, 2013 5:03 am
Room: Moderated Discussions
none (none.delete@this.none.com) on July 11, 2013 4:51 am wrote:
> Michael S (already5chosen.delete@this.yahoo.com) on July 11, 2013 4:12 am wrote:
> > none (none.delete@this.none.com) on July 11, 2013 1:49 am wrote:
> >
> > >
> > > I now wait for evidence that Geekbench favors ARM, and I somehow think
> > > nothing as obvious as what was found with AnTuTu will be uncovered.
> > >
> >
> >
> > About Geekbench, I agree with what Exophase had written on Anandtech forum - Geekbench Integer
> > scores, esp. single-threaded, look very reasonable and IMHO are far better than anything else
> > we have for cross-platform mobile benchmarking. The rest of Geekbench - not so much. I tend to
> > ignore Geekbench floating-point and to take Geekbench Memory with a solid grain of salt.
>
> I agree with you two, though I tend to add Stream Performance to single-threaded integer results.
>
> Geekbench Memory Performance results often make no sense, and FP, well it's hard to
> say what's going on, that denormal stuff Klimax mentions certainly is an issue that
> should be solved.

Which benchmark is affected by denormals? I thought pretty much any modern CPU nowadays deals with denormals in hardware with minimal penalty...

I'll just say again what I told Klimax: the Android x86 version
> uses SSE and not x87. Here are the critical loops of Dot Product, both x86 and ARM:
>
> c54d8: f3 0f 10 0c 97 movss (%edi,%edx,4),%xmm1
> c54dd: f3 0f 59 0c 96 mulss (%esi,%edx,4),%xmm1
> c54e2: 42 inc %edx
> c54e3: f3 0f 58 c1 addss %xmm1,%xmm0
> c54e7: 3b 55 f0 cmp -0x10(%ebp),%edx
> c54ea: 75 ec jne c54d8
> c54ec: 41 inc %ecx
> c54ed: 3b 4d ec cmp -0x14(%ebp),%ecx
> c54f0: 74 0a je c54fc
> c54f2: 8b 50 28 mov 0x28(%eax),%edx
> c54f5: 89 55 f0 mov %edx,-0x10(%ebp)
> c54f8: 31 d2 xor %edx,%edx
> c54fa: eb eb jmp c54e7

>
> a42a8: eb06 0c03 add.w ip, r6, r3
> a42ac: eddc 6a00 vldr s13, [ip]
> a42b0: eb05 0c03 add.w ip, r5, r3
> a42b4: ed9c 7a00 vldr s14, [ip]
> a42b8: ee46 7a87 vmla.f32 s15, s13, s14
> a42bc: 3101 adds r1, #1
> a42be: 3304 adds r3, #4
> a42c0: 42b9 cmp r1, r7
> a42c2: d1f1 bne.n a42a8
> a42c4: 3201 adds r2, #1
> a42c6: 42a2 cmp r2, r4
> a42c8: d003 beq.n a42d2
> a42ca: 2300 movs r3, #0
> a42cc: 6ac7 ldr r7, [r0, #44] ; 0x2c
> a42ce: 4619 mov r1, r3
> a42d0: e7f6 b.n a42c0
>

>
> Both codes look similarly bad :-)

Yes, GCC can still generate some inefficient code at times, especially the array accesses look bad... The Intel version is vectorized, which means the ARM version will be about twice as fast again when built with Neon. So yes, setting compiler options etc right matters...

Wilco
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TopicPosted ByDate
ARM at Computexanon2013/06/03 08:54 AM
  ARM at ComputexExophase2013/06/03 09:31 AM
    ARM at ComputexWilco2013/06/03 10:52 AM
      ARM at ComputexExophase2013/06/03 12:02 PM
        ARM at Computexnone2013/06/03 01:28 PM
          ARM at ComputexAlberto2013/06/04 10:41 AM
            ARM at Computexanon2013/06/04 01:36 PM
              ARM at ComputexWilco2013/06/04 03:56 PM
                ARM at ComputexDavid Kanter2013/06/04 04:51 PM
                  ARM at ComputexNobodyatAll2013/06/04 05:53 PM
                  ARM at Computexanon2013/06/04 06:53 PM
        ARM at ComputexWilco2013/06/03 01:47 PM
    ARM at Computexanon2013/06/04 04:03 AM
      ARM at ComputexDavid Kanter2013/06/04 08:16 AM
      ARM at ComputexExophase2013/06/04 10:36 AM
        ARM at ComputexWilco2013/06/04 04:09 PM
          ARM at ComputexNobodyatAll2013/06/04 04:23 PM
          ARM at ComputexDavid Kanter2013/06/04 05:00 PM
            ARM at Computexnone2013/06/05 05:26 AM
              ARM at Computexanon2013/06/05 07:19 AM
              ARM at Computexaaron spink2013/06/05 03:04 PM
                Saltwell Outperforming A15...With Less Power!!!Jason2013/06/07 01:56 PM
                  Saltwell Outperforming A15...With Less Power!!!John2013/06/08 06:28 AM
                    Saltwell Outperforming A15...With Less Power!!!Kevin G2013/06/08 02:18 PM
                      Saltwell Outperforming A15...With Less Power!!!David Kanter2013/06/08 08:43 PM
                      Saltwell Outperforming A15...With Less Power!!!tarlinian2013/06/09 02:00 PM
                        Saltwell Outperforming A15...With Less Power!!!none2013/06/09 03:11 PM
                          Saltwell Outperforming A15...With Less Power!!!none2013/07/10 11:46 AM
                            Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/10 07:59 PM
                              Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/10 10:03 PM
                                Saltwell Outperforming A15...With Less Power!!!anon2013/07/10 10:29 PM
                                  Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/10 11:30 PM
                                    Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/11 01:04 AM
                                      Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 03:10 AM
                                        Saltwell Outperforming A15...With Less Power!!!anon2013/07/11 04:10 AM
                                        Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/11 04:43 AM
                                        Saltwell Outperforming A15...With Less Power!!!Steve2013/07/14 08:10 PM
                                          Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/14 10:55 PM
                                          Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/15 02:03 AM
                                            Saltwell Outperforming A15...With Less Power!!!anon2013/07/16 01:07 AM
                                              Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/16 06:25 AM
                                                Saltwell Outperforming A15...With Less Power!!!none2013/07/16 06:34 AM
                                                Saltwell Outperforming A15...With Less Power!!!Exophase2013/07/16 10:34 AM
                                                  Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/18 02:24 PM
                                                    Saltwell Outperforming A15...With Less Power!!!none2013/07/18 03:26 PM
                                    Saltwell Outperforming A15...With Less Power!!!anon2013/07/11 02:50 AM
                                      Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 11:25 PM
                                        Saltwell Outperforming A15...With Less Power!!!anon2013/07/11 11:45 PM
                                          Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/12 12:10 AM
                                            Saltwell Outperforming A15...With Less Power!!!anon2013/07/12 01:52 AM
                                    Saltwell Outperforming A15...With Less Power!!!Gabriele Svelto2013/07/11 04:20 AM
                                      Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 11:51 PM
                                Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/11 12:02 AM
                                  Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 12:28 AM
                                    Saltwell Outperforming A15...With Less Power!!!none2013/07/11 01:49 AM
                                      Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 03:00 AM
                                        Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 03:02 AM
                                        Saltwell Outperforming A15...With Less Power!!!none2013/07/11 04:44 AM
                                          Saltwell Outperforming A15...With Less Power!!!Michael S2013/07/11 05:33 AM
                                            Saltwell Outperforming A15...With Less Power!!!none2013/07/11 05:58 AM
                                              Saltwell Outperforming A15...With Less Power!!!none2013/07/11 05:59 AM
                                              Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/11 07:40 AM
                                                Saltwell Outperforming A15...With Less Power!!!Michael S2013/07/11 08:34 AM
                                                  Saltwell Outperforming A15...With Less Power!!!none2013/07/11 08:50 AM
                                              Saltwell Outperforming A15...With Less Power!!!Michael S2013/07/11 09:02 AM
                                          Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 10:11 PM
                                      Saltwell Outperforming A15...With Less Power!!!Michael S2013/07/11 04:12 AM
                                        Saltwell Outperforming A15...With Less Power!!!none2013/07/11 04:51 AM
                                          Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/11 05:03 AM
                                            Saltwell Outperforming A15...With Less Power!!!none2013/07/11 05:12 AM
                                              Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/11 07:26 AM
                                                Saltwell Outperforming A15...With Less Power!!!none2013/07/11 08:29 AM
                                                Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/12 04:08 AM
                                                  Saltwell Outperforming A15...With Less Power!!!Michael S2013/07/12 04:25 AM
                                              Saltwell Outperforming A15...With Less Power!!!Klimax2013/07/11 11:55 PM
                                                Saltwell Outperforming A15...With Less Power!!!Megol2013/07/13 07:20 AM
                                    Java/Dalvik benchmarksbakaneko2013/07/11 02:26 AM
                                  Saltwell Outperforming A15...With Less Power!!!Linus Torvalds2013/07/11 10:57 AM
                                    Saltwell Outperforming A15...With Less Power!!!Linus Torvalds2013/07/11 11:20 AM
                                      Saltwell Outperforming A15...With Less Power!!!Ian Ameline2013/07/11 03:20 PM
                                      Saltwell Outperforming A15...With Less Power!!!Sylvain Collange2013/07/12 02:29 AM
                                        Saltwell Outperforming A15...With Less Power!!!Wilco2013/07/12 03:51 AM
                                          Saltwell Outperforming A15...With Less Power!!!Sylvain Collange2013/07/12 06:00 AM
                                      Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/12 03:28 AM
                                        Saltwell Outperforming A15...With Less Power!!!Linus Torvalds2013/07/12 09:11 AM
                                          Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/12 10:12 AM
                                          Saltwell Outperforming A15...With Less Power!!!2013/07/12 10:48 AM
                                            Saltwell Outperforming A15...With Less Power!!!Linus Torvalds2013/07/12 11:14 AM
                                              JIT2013/07/13 05:50 AM
                                                How'd you get this flower symbol as your user name ?anon2013/07/13 09:20 AM
                                                  How'd you get this flower symbol as your user name ?Doug S Ꭳ❂〄☢⚓♜☎♬⚄☠2013/07/13 10:12 AM
                                                JITx2013/07/15 06:43 AM
                                    Not reallyAnon2013/07/11 11:21 AM
                                    consistency, pleaseMichael S2013/07/11 11:22 AM
                                      consistency, pleaseLinus Torvalds2013/07/11 11:52 AM
                                        consistency, pleaseMichael S2013/07/11 02:43 PM
                                          consistency, pleaseLinus Torvalds2013/07/11 03:12 PM
                                            consistency, pleaseMark Roulo2013/07/11 03:54 PM
                                              the discussion was about absence of AVX in Silvermont (NT)Michael S2013/07/11 03:59 PM
                                                the discussion was about absence of AVX in SilvermontMark Roulo2013/07/11 04:19 PM
                                                  the discussion was about absence of AVX in SilvermontLinus Torvalds2013/07/12 09:16 AM
                                                    Thank youMark Roulo2013/07/12 09:58 AM
                                                    the discussion was about absence of AVX in Silvermontanon2013/07/12 10:10 AM
                                                      Not really (again)Anon2013/07/12 10:26 AM
                                                        Not really (again)anon2013/07/12 05:40 PM
                                                    the discussion was about absence of AVX in SilvermontLinus Torvalds2013/07/12 10:31 AM
                                                      you are wrong at about 100% of you saidMichael S2013/07/13 11:22 AM
                                                        you are wrong at about 100% of you saidLinus Torvalds2013/07/13 12:08 PM
                                                          you are wrong at about 100% of you saidMichael S2013/07/13 01:13 PM
                                                            you are wrong at about 100% of you saidLinus Torvalds2013/07/13 02:11 PM
                                                            you are wrong at about 100% of you saidvvid2013/07/13 03:20 PM
                                                              you are wrong at about 100% of you saidMichael S2013/07/14 01:38 AM
                                    Saltwell Outperforming A15...With Less Power!!!anon2013/07/11 06:41 PM
                                    Saltwell Outperforming A15...With Less Power!!!bakaneko2013/07/12 03:22 AM
                  Round 2: Baytrail benchmark (yes Antutu!) crushes Snapdragon 800.sammy2013/07/12 11:28 AM
                    Round 2: AnTuTu scores drop dramatically for AtomWilco2013/07/12 11:59 AM
                      Round 2: AnTuTu scores drop dramatically for AtomSteve2013/07/14 08:16 PM
                        Round 2: AnTuTu scores drop dramatically for AtomKlimax2013/07/14 10:59 PM
                        Round 2: AnTuTu scores drop dramatically for AtomDavid Kanter2013/07/15 01:57 PM
                          Intel is cheating AnTuTuWilco2013/07/15 03:43 PM
                            Intel is cheating AnTuTubakaneko2013/07/15 07:47 PM
                              Intel is cheating AnTuTuLinus Torvalds2013/07/15 08:45 PM
                                Intel is cheating AnTuTubakaneko2013/07/16 02:42 AM
                                  Intel is cheating AnTuTuWilco2013/07/16 03:47 AM
                                    Intel is cheating AnTuTubakaneko2013/07/16 05:50 AM
                                      Intel is cheating AnTuTuWilco2013/07/17 03:33 PM
                                        Intel is cheating AnTuTuKlimax2013/07/17 11:29 PM
                                          Intel is cheating AnTuTunone2013/07/17 11:35 PM
                                            Intel is cheating AnTuTuKlimax2013/07/18 01:41 AM
                                              Intel is cheating AnTuTuanon2013/07/18 02:10 AM
                                                Intel is cheating AnTuTuMichael S2013/07/18 03:39 AM
                                                Intel is cheating AnTuTuWilco2013/07/18 04:07 AM
                                                  Intel is cheating AnTuTunone2013/07/18 04:15 AM
                                                    Intel is cheating AnTuTuWilco2013/07/18 05:18 AM
                                                    Intel is cheating AnTuTuMichael S2013/07/18 06:44 AM
                                                      Intel is cheating AnTuTunone2013/07/18 07:47 AM
                                                        strict aliasingMichael S2013/07/18 08:10 AM
                                                          strict aliasing rules have existed since C89 (NT)Ricardo B2013/07/18 05:28 PM
                                                  Intel is cheating AnTuTuKlimax2013/07/18 11:30 AM
                                                Intel is cheating AnTuTuKlimax2013/07/18 11:39 AM
                                                  Intel is cheating AnTuTuanon2013/07/18 12:05 PM
                                                    Intel is cheating AnTuTuKlimax2013/07/20 12:05 AM
                                                      Intel is cheating AnTuTunone2013/07/20 02:50 AM
                                                  Intel is cheating AnTuTunone2013/07/18 12:38 PM
                                                    Intel is cheating AnTuTuKlimax2013/07/19 11:57 PM
                                  Intel is cheating AnTuTuLinus Torvalds2013/07/16 12:32 PM
                                Intel is cheating AnTuTu2013/07/16 03:16 AM
                                  Intel is cheating AnTuTubakaneko2013/07/16 04:55 AM
                                    Intel is cheating AnTuTuWilco2013/07/17 03:46 PM
                                      Intel is cheating AnTuTubakaneko2013/07/18 02:05 PM
                                      Intel is cheating AnTuTuDavid Kanter2013/07/19 02:31 AM
                          Round 2: AnTuTu scores drop dramatically for Atomanon2013/07/15 04:43 PM
                            Round 2: AnTuTu scores drop dramatically for Atomnone2013/07/16 12:15 AM
                          Round 2: AnTuTu scores drop dramatically for AtomGroo2013/07/16 07:35 AM
        ARM at Computexanon2013/06/04 10:43 PM
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