Mark, The newer CPUs do more monitoring internally rather that using absolute temp thresholds from the BMC. The CPU knows best what its thresholds should be, and the thresholds may be different for different CPUs. So, there are several IPMI sensors that expose the state of the CPU temperature via the newer PECI interface.
1) Thermal Margin - A negative value indicating margin to throttling point. Once margin reaches 0, throttling begins 2) Therm Control % - Reports the percentage of time within a 5.8 second sliding window during which the processor was throttling 3) VRD Hot - Discrete sensor indicating one of the phases of the processor VRD circuit on the baseboard has exceeded it's limit. This is NOT indicative of CPU - just the VR circuit on the baseboard. Therm Margin is the one to watch if you want max performance without throttling. If it reaches 0, you will start losing performance to throttling. Andy -----Original Message----- From: Mark Mackey [mailto:[EMAIL PROTECTED] Sent: Thursday, April 19, 2007 4:54 AM To: Cress, Andrew R Cc: ipmitool-devel@lists.sourceforge.net Subject: Re: [Ipmitool-devel] Missing sensors on Intel Cress, Andrew R wrote: >Attached is a sample "ipmiutil sensor" output from an Intel S5000 >system, and the "ipmitool sdr" and "ipmitool sensor" output, >respectively. ><snip> >Keep in mind that some Temperature sensors may be discrete sensors >rather than full sensors, meaning that their readings only indicate >status bits, not a full "degrees C". > > Thanks for this, but it still leaves me puzzled. The datasheets from Intel's website clearly state that processor temperature monitoring is present on this motherboard, but none of the outputs that you sent (which agree closely with what I get) give any processor temperature indication. How do I find out if the system is running hot? -- Dr Mark Mackey Director, Development Cresset Biomolecular Discovery Ltd ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Ipmitool-devel mailing list Ipmitool-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ipmitool-devel
