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    SubjectPre7 & Pre8: Heavy Context Switching in XFree86
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    Beginning with 2.2.0pre7 I have started to see a lot of context switching
    being reported by vmstat on a completely idle pII 450 ASUS P2B system:

    procs memory swap io system cpu
    r b w swpd free buff cache si so bi bo in cs us sy id
    1 0 0 0 67372 3388 27616 0 0 0 2 107 15214 14 41 46
    1 0 0 0 67372 3388 27616 0 0 0 0 109 176 2 0 98
    1 0 0 0 67372 3388 27616 0 0 0 0 114 21686 19 35 47
    1 0 0 0 67372 3388 27616 0 0 0 0 119 270 2 0 98
    0 0 0 0 67368 3388 27616 0 0 0 0 104 24265 23 28 50
    1 0 0 0 67368 3388 27616 0 0 0 0 114 218 2 0 98
    0 0 0 0 67368 3388 27616 0 0 0 0 108 23272 15 34 51
    1 0 0 0 67368 3388 27616 0 0 0 0 101 112 0 1 99
    0 0 0 0 67360 3392 27616 0 0 2 0 106 21869 15 32 53
    1 0 0 0 67360 3392 27616 0 0 0 0 107 155 1 2 97
    0 0 0 0 67360 3392 27616 0 0 0 0 115 18776 16 29 55
    1 0 0 0 67360 3392 27616 0 0 0 0 111 190 0 1 99
    0 0 0 0 67360 3392 27616 0 0 0 0 119 17090 15 28 57
    2 0 0 0 67356 3392 27616 0 0 0 0 173 403 1 1 98
    1 0 0 0 67360 3392 27616 0 0 0 1 290 9471 11 33 56
    1 0 0 0 67360 3392 27616 0 0 0 0 255 12671 14 28 58
    2 0 0 0 67360 3392 27616 0 0 0 0 185 20468 8 36 56
    5 0 0 0 67360 3392 27616 0 0 0 0 107 19988 13 28 59
    3 0 0 0 67356 3392 27616 0 0 0 0 115 16488 11 27 62
    2 0 0 0 67360 3392 27616 0 0 0 0 123 1277 3 3 94
    0 0 0 0 67356 3392 27616 0 0 0 0 123 13236 16 19 65

    Rebooting to pre6 and this goes away completely.

    System info:

    gomer:~$ uname -a
    Linux gomer.mlink.net 2.2.0-pre8 #1 Tue Jan 19 06:58:56 EST 1999 i686
    unknown
    gomer:~$ gcc -v
    Reading specs from
    /usr/lib/gcc-lib/i686-unknown-linux-gnulibc1/2.7.2.3/specs
    gcc version 2.7.2.3

    /usr/src/linux/.config:

    #
    # Processor type and features
    #
    # CONFIG_M386 is not set
    # CONFIG_M486 is not set
    # CONFIG_M586 is not set
    # CONFIG_M586TSC is not set
    CONFIG_M686=y
    CONFIG_X86_WP_WORKS_OK=y
    CONFIG_X86_INVLPG=y
    CONFIG_X86_BSWAP=y
    CONFIG_X86_POPAD_OK=y
    CONFIG_X86_TSC=y
    CONFIG_X86_GOOD_APIC=y
    # CONFIG_MATH_EMULATION is not set
    CONFIG_MTRR=y
    # CONFIG_SMP is not set

    gomer:~$ uptime
    7:42am up 0:08, 8 users, load average: 0.78, 0.53, 0.26

    Running XFree86 3.3.2 with XF86_SVGA driver (Riva TNT) and doing nothing
    significant at all.

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    ================================================================
    | Greg Patterson | EMAIL: gomer@gomer.mlink.net |
    | | gomer@mlink.net |
    | Step aside Microsoft, | IRC: Wizird (EFNET) |
    | Linux is here to stay. | WWW: http://gomer.mlink.net/~root |
    ================================================================


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