CONFIG_X86_TSC_DISABLE question
On Fri, Jan 03, 2003 at 05:52:55PM -0500, Mark Hahn wrote:
Hi Mark
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Depends on your box. Most standard SMP boxes are all clocked off the same clock, so it's not an issue.
Hi Martin
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Thanks for your reply
Is there a way to verify this? or must I contact the motherboard maker and ask for it? how I should ask it?
any SMP less than $50k is using a single clock to drive the CPUs, and therefore has TSC's in sync. if you owned a numa/clustered SMP, you'd know it - they're the only ones that need something special.
Thanks for your reply
I think that CONFIG_X86_TSC_DISABLE should be more informative on this
Ulisses
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Quoted 4 lines · Mark Hahn
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I think that
CONFIG_X86_TSC_DISABLEshould be more informative on thisat most, it should say "don't worry about this unless you need to. and you'll know it if you need to".
And It should say that the kernel test TSCs are syncroniced across CPUS at boot time, which I've just have found:
The message is the following in a 2.4.19-pre6 kernel
checking TSC synchronization across CPUs: passed.
I hope this helps somebody
Ulisses
Debian GNU/Linux: a dream come true
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"Computers are useless. They can only give answers." Pablo Picasso
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