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    SubjectRe: Kernel 2.6 with X (xorg) 4.4 (eats more CPU power)
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    On Wed, 2004-12-01 at 18:21 +0800, Joe Hsu wrote:

    > And I found something interisting happened. In pentium 4
    > 3.0G machine and linux kernel 2.6, X and my program total
    > consumes 5% of cpu resource.
    >
    > But in pentium 4 2.xG or below, it would consume 10% or
    > more of CPU resource. (If you try this with XFree86 4.2 and
    > pentium 1.xG machine, it would consume 30% or more of cpu
    > resource at a peak.)
    >
    > In contrast, I've tried Kernel 2.4 with same X, same
    > program, and same machine. It consumes almost zero of CPU
    > resource( no matter it runs on a P4 1.xG or P4 3.0G and no
    > matter it runs on 4.4 or 4.2 X-server).
    >
    > Same phenomenon happened when I ran 4 mpeg4 playback
    > programs (each 320x240, 30 frames per second, no scaling).
    > It seems that these programs and X consume almost zero of
    > CPU power when the KERNEL HZ is 100. (I've
    > tried Robert Love's variable HZ patch to kernel 2.4 and
    > change HZ to 1000........Same phenomenon as 2.6)
    >
    > Could any one explain why??? Thanks.
    > (I wish to be personally CC'ed the answers/comments posted
    > to the list in response to your posting 'cause I do not
    > subscribe to this mailing list.)
    >
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