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    SubjectRe: [PATCH 1/3] Updated dynamic tick patches - Fix lost tick calculation in timer_pm.c
    Hi!

    > > With this patch, time had kept up really well on one particular
    > > machine (Intel 4way Pentium 3 box) overnight, while
    > > on another newer machine (Intel 4way Xeon with HT) it didnt do so
    > > well (time sped up after 3 or 4 hours). Hence I consider this
    > > particular patch will need more review/work.
    > >
    >
    > Are lost ticks really that common? If so, any idea what's disabling
    > interrupts for so long (or if it's a hardware issue)? And if not, it
    > seems like you'd need an artificial way to simulate lost ticks in order
    > to test this stuff.

    Try running this from userspace (and watch for time going completely
    crazy). Try it in mainline, too; it broke even vanilla some time
    ago. Need to run as root.

    Pavel

    void
    main(void)
    {
    int i;
    iopl(3);
    while (1) {
    asm volatile("cli");
    // for (i=0; i<20000000; i++)
    for (i=0; i<1000000000; i++)
    asm volatile("");
    asm volatile("sti");
    sleep(1);
    }
    }


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