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    Subject[PATCH][2.6.20-rc1-mm1] sparsemem vmem_map optimzed pfn_valid() [0/2]
    This patch implements pfn_valid() micro optimization.

    This uses ia64_pfn_valid() idea to check mem_map is valid or not instead of
    sparsemem's logic.

    By this, we'll not access mem_section[] in usual ops.

    I attaches my easy test result with *micro* benchmark on SMP system.
    I'm glad if you give me an advice about testing.

    AIM Independent Resource Benchmark - Suite IX "1.1"

    test on
    CPU: Itanium2(madison) 1.3GHz x2, SMP
    Memory: memory 8G
    2.6.20-rc1-m1 /
    extreme means SPARSEMEM_VMEMMAP=n
    vmem_map means SPARSEMEM_VMEMMAP=y + optimze pfn_valid patch.
    extreme vmem_map
    creat-clo 136322 136989 File Creations and Closes per second
    page_test 1042187 1076976 System Allocations & Pages per second
    brk_test 2678559 2727286 System Memory Allocations per second
    signal_test 309525 321052 Signal Traps per second
    exec_test 803 801 Program Loads per second
    fork_test 9354 9679 Task Creations per second
    disk_rr 103766 103970 Random Disk Reads (K) per second
    disk_rw 82978 80244 Random Disk Writes (K) per second
    disk_rd 802548 872983 Sequential Disk Reads (K) per second
    disk_wrt 130342 131408 Sequential Disk Writes (K) per second
    disk_cp 107498 107823 Disk Copies (K) per second
    sync_disk_rw 800 752 Sync Random Disk Writes (K) per second
    sync_disk_wrt 81 78 Sync Sequential Disk Writes (K) per second
    sync_disk_cp 84 78 Sync Disk Copies (K) per second
    disk_src 44417 44379 Directory Searches per second
    mem_rtns_1 3239352 3222140 Dynamic Memory Operations per second
    mem_rtns_2 1157321 1155260 Block Memory Operations per second
    misc_rtns_1 10799 10993 Auxiliary Loops per second
    dir_rtns_1 1276159 1373725 Directory Operations per second
    shell_rtns_1 175 176 Shell Scripts per second
    shell_rtns_2 174 175 Shell Scripts per second
    shell_rtns_3 175 175 Shell Scripts per second
    shared_memory 646725 628769 Shared Memory Operations per second
    tcp_test 93258 94928 TCP/IP Messages per second
    udp_test 177984 177276 UDP/IP DataGrams per second
    fifo_test 362774 385434 FIFO Messages per second
    stream_pipe 320825 325931 Stream Pipe Messages per second
    dgram_pipe 300789 303339 DataGram Pipe Messages per second
    pipe_cpy 410539 449521 Pipe Messages per second

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      Last update: 2006-12-16 09:31    [W:0.023 / U:15.060 seconds]
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