Post Your Computer's Configurations

zCexVe

Active member
  • Sep 12, 2006
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    Where I'm now
    I cant find any white papers on SSE4.1. SSE = Streaming SIMD Instructions. They are able to optimize the mathematical operations like sqrt . SSE 2 was useful.SSE3 is useless.SSE4 didn't had a speed increase.(I think)SSE4.1 is? I dunno.Basic is they help to optimize mathematical operations in a CPU.Hope that helps.AFAIK Auto gordian knot(DivX encoder) can use it.Softwares should point to them to get use of them.Again I dunno programming in advanced level such as C/C++ to say how it is done.
    Edit : yay found it .
    But I cant understand it :S
    I have been trying to use the Intel DPPS instruction with either EXTRACTPS or BLENDPS. Essentially I have a loop in which


    x1 = dot-product(y1,z1)
    x2 = dot-product(y2,z2)
    x3 = dot-product(y3,z3)

    x4 = x1/(sqrt(x2)*sqrt(x3)

    I can do x1,x2,x3 with the DPPS instruction and then use extractps. So 3 DPPS with 3 EXTRACTPS. Turns out I did not get any improvement in performance. To use lesser number of EXTRACTPS, I used BLENDPS.

    x1_sse = dpps(y1,z1,241)
    x2_sse = dpps(y2,z2,242)
    x2_sse = blendps(x1_sse,x2_sse, 2);
    x3_sse = dpps(y3,z3, 244)
    x3_sse = blendps(x2_sse, x3_sse, 4)

    storeps(x3_sse, x3_array)
    x1 = x3_array[0]
    x2 = x3_array[1]
    x3 = x3_array[2]

    Turns out there is no improvement from this either, infact a slight degradation. All loads and stores are aligned. I am using icpc -ipo -xT -O3 -no-prec-div -static -funroll-loops (so -fast without -ipo since -ipo does not work with SSE4.1 instructions). Any comments on how I could do this better or are these instruction latencies just too long for my use ? I guess I am dissapointed with the performance of the SSE 4.1 so far.

    icpc -xS supports automatic selection of SSE4.1 instructions, where the compiler deems them beneficial. dpps fully unrolled "vectorization" of an inner loop inhibits auto-vectorization of a containing loop, which would seem a likely application of it. In the case where traditional "re-rolling" of a long partially unrolled dot product loop avoids the compiler selection of dpps, that is the better way to full performance.
    Much as ad writers love to get paid for writing about new instructions, more significant performance improvements of Penryn CPUs are realized in SSE2 code, for example, by the improved performance of IEEE divide and square root (both serial and parallel versions), and by the higher supported FSB ratings.
    From Intel software network.Look in it.
     
    Last edited:

    lkh

    Member
    Dec 29, 2007
    617
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    0
    36
    Intel Core 2 Quad 2.40GHz Processor
    Intel Mother Board (DG35EC)
    Kingston 2GB RAM
    Hard Disk Hitachi 500GB SATA
    VGA Card Gigabyt GeForce 8500 GT 512MB PCI Express
    Samsung 19" LCD Monitor
    24x Samsung DVD writer
    Creative Audigy 7.1 Sound Card
     

    rajitha100

    Member
    Sep 9, 2008
    3
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    0
    Processor: Intel Core 2 Duo E6550 @ 3.29GHz (oc)
    Motherboard: Intel
    Graphics: Sapphire 1600 Pro DDR2 256MB (oc) (GPU @ 648MHz / Memory @ 437MHz)
    RAM: Kingston VR 1GB DDR2 800
    HDD: 250GB Seagate Barracuda (SATA II) + 160GB Western Digital (PATA)
    Monitor: 17" viewSonic
    ROM Drives: SONY DVD-RW / Imation DVD-RW
    Sound: Creative Sound Blaster 2.1 System
    [url=clubsl.freehostia.com]------Clubsl-----[/URL]
     
    Last edited:

    imaliudayanga

    Member
    Aug 3, 2007
    29
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    0
    Processor: Intel Core 2 Duo E6550 @ 2.4GHz (oc)
    Motherboard: Gigabite S series
    Graphics: N Vidia 9600 Over Clock 1 GB
    RAM: Kingston VR 4GB DDR2 800
    HDD:Segate 640GB & 320GB (SATA II)
    Monitor: 17" Acer LCD Moniter
    ROM Drives:LG DVD Writer with Secure Disk
    Casing: I Cute Fiber Casing( I Can See Whole Inside & It Cost Me Rs.10,000/=)
    Sound: Creative Sound Blaster 5.1 (5200) With Front Sound Module.Can In put Optical,AR,ect.
     

    nad253

    Well-known member
  • Oct 11, 2006
    14,662
    370
    83
    No idea!
    imaliudayanga said:
    Processor: Intel Core 2 Duo E6550 @ 2.4GHz (oc)
    Motherboard: Gigabite S series
    Graphics: N Vidia 9600 Over Clock 1 GB
    RAM: Kingston VR 4GB DDR2 800
    HDD:Segate 640GB & 320GB (SATA II)
    Monitor: 17" Acer LCD Moniter
    ROM Drives:LG DVD Writer with Secure Disk
    Casing: I Cute Fiber Casing( I Can See Whole Inside & It Cost Me Rs.10,000/=)
    Sound: Creative Sound Blaster 5.1 (5200) With Front Sound Module.Can In put Optical,AR,ect.
    :D ;)
     
    May 5, 2007
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    Space
    PC upgraded

    Core2 quad Q6600 SLACR CPU
    ASUS P5Q-E Motherboard with Crossfire x
    OCZ REAPER HPC 1066Mhz 4GB Ram
    250 GB HDD (Sam 252hj)
    Delux 500w PSU
    Sony DVD +-RW
    PNY NVIDIA Geforce 8800GT VGA
    FDD :D
    Customized Amplifier + Buffels (pure 500 watt RMS.)
    A4 tech M.media keyboard + Logitec wireless Mouse
    View Sonic VA903b 19inch LCD
     

    nuwa1

    Member
    Oct 22, 2007
    5,682
    40
    0
    iN mY BoDy
    fazaal24 said:
    Ma new RIG!

    Motherboard: Asus P5E3 Deluxe

    Processor: Intel Core 2 Quad Q6600 @ 2.4GHz

    VGA: Nvidia GeForce 8800GT DDR3 512mb

    Ram: 2*2gb DDR3 1333

    Hard Disk: 2*500gb Samsung

    Screens: 2* 19" Samsung - Syncmaster 943NWX

    Rom Drives: 2 * Samsung Writemaster Lightscribe

    Casing: RaidMax X-1

    :yes::yes::yes:;);) Endenawa !!!! umbath indala indala dunna neda gema :P
     

    nuwa1

    Member
    Oct 22, 2007
    5,682
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    0
    iN mY BoDy
    dxxcxxxx said:
    Intel Celeron 2.6 GHz Processor
    P4MA Pro 533 Motherboard
    NX6200AX 256MB DDR2 Graphics Card
    2GB DDR1 RAM (Taiwan)
    250GB Hard Disk Drive (Western Digital)
    LG DVD-RW / Liteon DVD ROM
    Creative Blaster Audigy (24-bit) Sound Card
    Logitech X540 Speakers
    15" CRT Monitor
    Logitech QuickCam Pro 5000 Webcam
    Linksys Wireless-G Card
    Window XP (SP2) Operating System

    :yes::yes: Nice ... thanks machan for sharing with us :D
     

    nuwa1

    Member
    Oct 22, 2007
    5,682
    40
    0
    iN mY BoDy
    lkh said:
    Intel Core 2 Quad 2.40GHz Processor
    Intel Mother Board (DG35EC)
    Kingston 2GB RAM
    Hard Disk Hitachi 500GB SATA
    VGA Card Gigabyt GeForce 8500 GT 512MB PCI Express
    Samsung 19" LCD Monitor
    24x Samsung DVD writer
    Creative Audigy 7.1 Sound Card

    ela ela :yes::yes:
     

    nuwa1

    Member
    Oct 22, 2007
    5,682
    40
    0
    iN mY BoDy
    rajitha100 said:
    Processor: Intel Core 2 Duo E6550 @ 3.29GHz (oc)
    Motherboard: Intel
    Graphics: Sapphire 1600 Pro DDR2 256MB (oc) (GPU @ 648MHz / Memory @ 437MHz)
    RAM: Kingston VR 1GB DDR2 800
    HDD: 250GB Seagate Barracuda (SATA II) + 160GB Western Digital (PATA)
    Monitor: 17" viewSonic
    ROM Drives: SONY DVD-RW / Imation DVD-RW
    Sound: Creative Sound Blaster 2.1 System
    ------Clubsl-----

    Nice rig machan, but pls do not post links of the sl sites...:dull: and welcome to EK ;)
     

    nirun

    Member
    Feb 21, 2007
    41
    0
    0
    Earth
    Mine's HP Pavilion dv6607tx Notebook

    Intel Core 2 Duo T5450 @ 1.66GHz
    DDR2 4GB RAM
    128MB nVidia GeForce 8400M GS
    15.4" Widescreen
    Light-Scribe DVD Writer
    120GB HDD
    Vista Home Premium SP1
    Bluetooth, Wi-Fi a/b/g, Fingerprint Reader & Web Cam