Messages in this thread | | | Subject | Re: Calibration issues with USB disc present. | From | Lee Revell <> | Date | Wed, 16 Nov 2005 19:30:23 -0500 |
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On Wed, 2005-11-16 at 16:03 -0800, Max Krasnyansky wrote: > I think in the short term your best bet is to globally disable SMI at > early > boot stage (ie before TSC calibration). > Some people might argue that it's not the most graceful solution > because it might > brake some BIOS features but it's a very common trick that is used by > RT folks > (for example RTAI has configurable option to enable SMI workaround) > because > on some chipset/BIOS combinations SMIs introduce horrible latencies. > And you > cannot do much about that other than disabling SMI. > I have not seen any reports of negative side effects of disabling SMI > yet. But > if you're worried about that you could re-enable it later when you're > done with > TSC calibration and stuff. >
Hmm, interesting, I had no idea this was possible. Is there a generic way to disable SMI? It would be useful for the -rt tree as lots of low latency audio users have problems with SMI induced underruns.
Lee
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