Clocksource tsc unstable ubuntu

Dec 29,  · Welcome to comienzoweb.com, a friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. And a couple of extra links: oficial kernel doc (there are other interesting files in this dir) and TSC resynchronization in chromebooks with some benchmarks of different clocksources. In short, there shouldn't be any userspace visible changes when changing the clocksource, only a . The "tsc" log happened once during the particular boot session and in each case the hang happened AFTER the "acpi_pm" clocksource was installed. Some servers were up for many ~16 days and within 1 to 13 hours after "acpi_pm" installed, the server hang.

Clocksource tsc unstable ubuntu

However, compared to tsc, jiffies is a very poor clocksource, and therefore I suspect that tsc at this situation will always be "unstable" because there is a bad watchdog to verify it. I also check some other system with well working tsc, and find they have other clocksources like Hpet or acpi_pm. Jan 24,  · Asside from the problem that tsc time will drift depending on your system load, if you have a multi-core system, tsc will drift from itself on different cores. Some multi-core cpu's will synchronize tsc (I think the Intel Core 2 series, for example, but don't quote me),, whereas other CPU's will lead to tsc being unstable and the system switching to something else. Whenever I see Linux booting, I see this message: clocksource tsc unstable (delta = NNNNNNNN ns) where NNNNNNNN is some very large number which may .

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