On Wed, 27 Jul 2005, Steven J. Magnani wrote:
> I have been looking into some thermal shutdown issues with our board, > and discovered that LinuxBIOS is not enabling the P4's ability to > throttle back when the internal sensors indicate that the processor is > getting too hot. yes, this is purposeful. We let linux do that here. It is a bad deal if 1 node of 1022 decides to slow down. We do this type of thing in Linux. See the LLNL p4therm module for a piece of kernel code that can let you talk to the hardware. I think Intel's emphasis on having the BIOS do this kind of thing is a real mistake. > It would be relatively easy to implement support for "TM1" thermal > control, since that's just setting a MSR bit if the proper CPUID flag is > set. "TM2" control would be a little more complicated, since there is > the added ability to control the operating frequency and voltage when > the processor trips into thermal management mode. It's easy, and the kernel (directed by a user-mode program) should do it. ron _______________________________________________ LinuxBIOS mailing list LinuxBIOS@openbios.org http://www.openbios.org/mailman/listinfo/linuxbios