Windows S5R3 App 4.25 available for Beta Test

Forums › Cruncher's Corner

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3522
Credit: 753242758
RAC: 1193033

RE: RE: mov esi,

21 Jan 2008 11:25:19 UTC
Message 77369 in response to message 77367
(moderation:
    )

    Quote:
    Quote:

    mov esi, DWORD PTR [eax]
    mov eax, DWORD PTR [eax+04h]
    mov DWORD PTR [esp+0b4h], eax
    mov DWORD PTR [esp+0b0h], esi
    fld QWORD PTR [esp+0b0h]
    mov DWORD PTR [esp+090h], ecx
    mov DWORD PTR [esp+094h], ecx
    fld QWORD PTR [esp+090h]
    mov DWORD PTR [esp+070h], ecx
    mov DWORD PTR [esp+074h], ecx
    fld QWORD PTR [esp+070h]

    I really don't know what the compiler had on his mind when he was writing that :-)


    Each complier has to follow a scheme, because they don't have any intuitions.

    1, init local variables

    Quote:
    mov esi, DWORD PTR [eax]
    mov eax, DWORD PTR [eax+04h]
    mov DWORD PTR [esp+0b4h], eax
    mov DWORD PTR [esp+0b0h], esi
    mov DWORD PTR [esp+090h], ecx
    mov DWORD PTR [esp+094h], ecx
    mov DWORD PTR [esp+070h], ecx
    mov DWORD PTR [esp+074h], ecx

    2, compile calculations
    Quote:
    fld QWORD PTR [esp+0b0h]
    fld QWORD PTR [esp+090h]
    fld QWORD PTR [esp+070h]

    3, optimalization (interlace of integer/FPU operations)
    Quote:
    mov esi, DWORD PTR [eax]
    mov eax, DWORD PTR [eax+04h]
    mov DWORD PTR [esp+0b4h], eax
    mov DWORD PTR [esp+0b0h], esi
    fld QWORD PTR [esp+0b0h]
    mov DWORD PTR [esp+090h], ecx
    mov DWORD PTR [esp+094h], ecx
    fld QWORD PTR [esp+090h]
    mov DWORD PTR [esp+070h], ecx
    mov DWORD PTR [esp+074h], ecx
    fld QWORD PTR [esp+070h]

    So, this is an optimized result.
    But, always is a faster solution, of course.

    After looking at that code again, I think in this special case the ecx seems to be always zero (there's a preceeding XOR ecx,ecx) , so basically the floating point instructions should just be

    fld QWORD PTR [eax]
    fld0
    fld0

    reducing the number of store forwarding stalls from three to zero.

    CU

    Bikeman

    Bernd Machenschalk
    Bernd Machenschalk
    Moderator
    Administrator
    Joined: 15 Oct 04
    Posts: 4330
    Credit: 251367661
    RAC: 36336

    RE: As to the Win beta

    21 Jan 2008 11:35:42 UTC
    Message 77371 in response to message 77366
    (moderation:
      )

      Quote:

      As to the Win beta app:

      Graphics work like a charm, even under Windows Vista.


      This is good news! Thank you!

      Quote:

      As to the speed, I did some profiling and disassembling and as Bernd has already mentioned, the Microsoft compiler just ruined the hot-loop, even worse than gcc did for the latest beta app :-(

      In addition, the Compiler emits code that is really not so hot when it comes to copying or initializing double precision floating point data [...]


      I'll try to build an App with the old Visual Studio of 2003 (instead of VS2005). At least the /G7 optimization should work there. Let's see if it helps...

      BM

      BM

      Bikeman (Heinz-Bernd Eggenstein)
      Bikeman (Heinz-...
      Moderator
      Joined: 28 Aug 06
      Posts: 3522
      Credit: 753242758
      RAC: 1193033

      Was that the version that had

      21 Jan 2008 11:43:14 UTC
      Message 77372
      (moderation:
        )

        Was that the version that had the AMD punishing code included in the math lib, or was that an even older one? Difficult choice there.

        CU
        H-B

        Bernd Machenschalk
        Bernd Machenschalk
        Moderator
        Administrator
        Joined: 15 Oct 04
        Posts: 4330
        Credit: 251367661
        RAC: 36336

        RE: Was that the version

        21 Jan 2008 11:49:22 UTC
        Message 77373 in response to message 77372
        (moderation:
          )

          Quote:
          Was that the version that had the AMD punishing code included in the math lib, or was that an even older one? Difficult choice there.


          IIRC the "AMD-Punishment" happened in a version of the SIN/COS code that I don't intend to use now.

          BM

          BM

          Brian Silvers
          Brian Silvers
          Joined: 26 Aug 05
          Posts: 772
          Credit: 282700
          RAC: 0

          RE: Was that the version

          21 Jan 2008 11:50:00 UTC
          Message 77374 in response to message 77372
          (moderation:
            )

            Quote:
            Was that the version that had the AMD punishing code included in the math lib, or was that an even older one? Difficult choice there.

            If it happens like it did before, at least I can "fix" it... :-)

            Edit: I see Bernd commented on where... Even still, I know how to deal with that issue....

            Richard Haselgrove
            Richard Haselgrove
            Joined: 10 Dec 05
            Posts: 2143
            Credit: 2974634618
            RAC: 794185

            The SETI volunteer optimisers

            21 Jan 2008 12:02:46 UTC
            Message 77375
            (moderation:
              )

              The SETI volunteer optimisers (NOT the main SETI project programmers) had problems with 32-bit Vista compatibility. I have an unconfirmed memory (can't find the reference just now) that it was cured by upgrading from VS2003 to VS 2005 SP1. May be a false alarm, but I would suggest a specific test under Vista for any VS2003 app.

              Bernd Machenschalk
              Bernd Machenschalk
              Moderator
              Administrator
              Joined: 15 Oct 04
              Posts: 4330
              Credit: 251367661
              RAC: 36336

              RE: The SETI volunteer

              21 Jan 2008 12:25:08 UTC
              Message 77376 in response to message 77375
              (moderation:
                )

                Quote:
                The SETI volunteer optimisers (NOT the main SETI project programmers) had problems with 32-bit Vista compatibility. I have an unconfirmed memory (can't find the reference just now) that it was cured by upgrading from VS2003 to VS 2005 SP1. May be a false alarm, but I would suggest a specific test under Vista for any VS2003 app.


                Good point!

                Thank you!

                BM

                BM

                Bernd Machenschalk
                Bernd Machenschalk
                Moderator
                Administrator
                Joined: 15 Oct 04
                Posts: 4330
                Credit: 251367661
                RAC: 36336

                RE: I'll try to build an

                21 Jan 2008 17:43:44 UTC
                Message 77377 in response to message 77371
                (moderation:
                  )

                  Quote:
                  I'll try to build an App with the old Visual Studio of 2003 (instead of VS2005). At least the /G7 optimization should work there. Let's see if it helps...


                  Continued here.

                  BM

                  BM

                  Svenie25
                  Svenie25
                  Joined: 21 Mar 05
                  Posts: 139
                  Credit: 2436862
                  RAC: 0

                  Could it be, that this

                  21 Jan 2008 18:19:20 UTC
                  Message 77378
                  (moderation:
                    )

                    Could it be, that this versions, beta and poweruser, doesn´t function with Windows 64bit? I´m running Vista Ultimat and get an errromessage, if I try to use these app. Sorry, I deleted it from BOINC-Manager, but it sounden somethinh like "no windows x85_64 app found" or so.

                    Edit says: It is the same errormassage that some guys posted in the Linux-Poweruserapp-thread.

                    RandyC
                    RandyC
                    Joined: 18 Jan 05
                    Posts: 6675
                    Credit: 111139797
                    RAC: 0

                    RE: Could it be, that this

                    21 Jan 2008 23:58:04 UTC
                    Message 77379 in response to message 77378
                    (moderation:
                      )

                      Quote:

                      Could it be, that this versions, beta and poweruser, doesn´t function with Windows 64bit? I´m running Vista Ultimat and get an errromessage, if I try to use these app. Sorry, I deleted it from BOINC-Manager, but it sounden somethinh like "no windows x85_64 app found" or so.

                      Edit says: It is the same errormassage that some guys posted in the Linux-Poweruserapp-thread.

                      I've been running the Beta version since last night on XP Pro 64 with no problems. Just started the poweruser version and it seems OK. Will monitor it.

                      Seti Classic Final Total: 11446 WU.

                      Comment viewing options

                      Select your preferred way to display the comments and click "Save settings" to activate your changes.

                      Forums › Cruncher's Corner