Vlákno názorů k článku Test: paměti mají čtyřistakrát delší latenci než procesory od vlk - tak pridam tri dost odlisne intely: model name ...

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  • 16. 2. 2009 2:40

    vlk (neregistrovaný)
    tak pridam tri dost odlisne intely:

    model name : Intel(R) Core(TM)2 CPU U7500 @ 1.06GHz
    cpu MHz : 800.000
    cache size : 2048 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM)2 CPU U7500 @ 1.06GHz
    cpu MHz : 800.000
    cache size : 2048 KB
    cache_alignment : 64
    AVG CPU CLOCKS FOR DEPENDENT INDEPENDENT
    rdtsc 86.680 85.348
    32bit add 1.338 0.457
    32*32->64bit imul 4.773 1.528
    0*0 imul 4.795
    64/32->32.32 div 41.996
    64bit fadd 2.251 1.027
    64bit NaN+x fadd 196.149 214.582
    64bit fmul 5.000 2.028
    64bit fdiv 37.471 37.000
    32bit load from L1-cache 0.996 pitch=4B
    typical L1-miss load 31.134 pitch=74B
    load from RAM 275.46ns 220.369 pitch=1048572B
    load from RAM 389.17ns 311.336 pitch=1048572B (1-pass cache flush)


    model name : Intel(R) Xeon(TM) CPU 3.20GHz
    cpu MHz : 3192.202
    cache size : 2048 KB
    cache_alignment : 128
    model name : Intel(R) Xeon(TM) CPU 3.20GHz
    cpu MHz : 3192.202
    cache size : 2048 KB
    cache_alignment : 128
    AVG CPU CLOCKS FOR DEPENDENT INDEPENDENT
    rdtsc 100.001 100.000
    32bit add 0.999 0.397
    32*32->64bit imul 11.000 2.044
    0*0 imul 11.000
    64/32->32.32 div 76.057
    64bit fadd 5.260 1.349
    64bit NaN+x fadd 1087.812 1067.265
    64bit fmul 7.998 2.149
    64bit fdiv 45.022 45.079
    32bit load from L1-cache 1.075 pitch=4B
    typical L1-miss load 44.712 pitch=74B
    load from RAM 69.70ns 222.492 pitch=1048572B
    load from RAM 176.68ns 564.008 pitch=1048572B (1-pass cache flush)


    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
    cpu MHz : 2699.132
    cache size : 8192 KB
    cache_alignment : 64
    AVG CPU CLOCKS FOR DEPENDENT INDEPENDENT
    rdtsc 21.818 21.816
    32bit add 0.909 0.335
    32*32->64bit imul 4.341 1.828
    0*0 imul 4.342
    64/32->32.32 div 25.023
    64bit fadd 1.945 0.942
    64bit NaN+x fadd 242.969 267.198
    64bit fmul 4.543 0.942
    64bit fdiv 21.804 21.750
    32bit load from L1-cache 0.906 pitch=4B
    typical L1-miss load 25.714 pitch=74B
    load from RAM 61.38ns 165.671 pitch=1048572B
    load from RAM 60.74ns 163.955 pitch=1048572B (1-pass cache flush)
  • 16. 2. 2009 3:36

    Solitary
    Trosku me zarazi to 8-jadrove i7... to mas nejakou dvouprocesorovou platformu, nebo to se takhle i7 jen prezentuje diky hyperthreadingu?
  • 16. 2. 2009 8:01

    vlk (neregistrovaný)
    jo, je to jeden procesor a je to 4-jadro a kazde znich ma dva virtualne jadra (HT)
    + v procesore je trojkanalovy radic DDR3
  • 16. 2. 2009 9:05

    vencas (neregistrovaný)
    Když vypneš v BIOSu HT, tak by to mělo běžet víceméně 2x rychleji, ne? Docela by mě to zajímalo, uvažuju o koupení i7 _nebo_ Phenomu na komilování a chroustání čísel. Budu vděčný.