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    SubjectStrange scheduling behavoir in SMP (kernel 2.2.14)

    I have a SMP machine with two Pentium III. In order to compare performance with other machines I began a simple test:

    for (i=0;i<MAX_NUMBER;i++)
    c=a*b; /* These variables could be integer or double */

    Using kernel 2.2.12 with SMP support this simple program take more time in my machine than in a uniprocessor with K6-2 (the same problem appear in the last stable kernel 2.2.14) Using xosview
    application I discovered where the problem was. Instead of staying all the time in the same cpu, the process go from one cpu to other with a big performance lost.

    Am I right?. Has been this problem solved in 2.3.x series?

    Thanks a lot in advance.

    Prof. Antonio Flores Gil
    Departamento de Ingeniería y Tecnología de Computadores. Facultad de
    Informática. Universidad de Murcia
    Campus de Espinardo - 30080 Murcia (SPAIN)
    Tel.: +34-968-364638 Fax: +34-968-364151

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