Hi, Recently when I tried to test disk IO of a dual-processor PC using linux 2.4.0-test1 SMP, I found that the clock slows down. Could somebody tell me why it happened, and is there any patch for this problem? BTW, is there any good tool to measure disk IO, like "iostat" on Solaris? Thanks! Xiangping - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/