6/11/2023 0 Comments Windows afd socket buffer size![]() ![]() If present, work with your system administrator to identify and correct the cause allowing the TSC timesource to be used. Kernel: Falling back to a sane timesource now.Īs the log messages suggest, this can be caused by a variable rate CPU (SpeedStep), having DMA disabled, or incorrect TSC synchronization on multi CPU computers. Kernel: Incorrect TSC synchronization on an SMP system (see dmesg). Kernel: You don't have DMA enabled for your hard disk (see hdparm), Kernel: TSC cannot be used as a timesource. It is suggested that you check your system logs ( /var/log/dmesg) to verify that the following is not present. Note that Coherence and the underlying JVM are not aware of the timesource which the operating system is using. The slower time sources can be 10 to 30 times more expensive to query then the TSC timesource, and may have a measurable impact on Coherence performance. ![]() Linux chooses TSC by default and during startup checks for inconsistencies, if found it switches to a slower safe timesource. Linux has several high resolution timesources to choose from, the fastest TSC (Time Stamp Counter) unfortunately is not always reliable.
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