Hi Jean, thank you very much for your answer. I'm sorry because of the advertisement, but it is added by my email provider. >> could anyone tell me how to read the CPU temperature within a kernel module? >> Is this possible? >> Any proposals? > Using the hardware monitoring drivers, no, it's not possible. The > drivers export temperature values, but don't know which temperature > corresponds to the CPU - as this is completely board-dependant, the > mapping is done in user-space. The returned values may also need > scaling, which is done in user-space as well. > Now, you may take you chance with ACPI. The "thermal" ACPI driver, > where available, provides a temperature which doesn't need scaling. I > see nothing which guarantees that the temperature provided correponds > to the CPU, but this seems to be true in most cases. > May I ask why you would need this information from a kernel driver? I want to measure the influence of temperature on the performance of the CPU. Due to this I have an external hardware which generates a very precise signal every second. This signal causes an interrupt and in the interrupt service routine (= kernel-mode / kernel module) I want to printk the timestamp counter and the temperature of the CPU. First I wanted to use a user-mode application, but this way I get a too big and variing latencies. Unfortenately I don't know how to read from the bus which can deliver the temperature information. How can I give ACPI a try? Is there a code example? Nice day Andreas Machen Sie aus 14 Cent spielend bis zu 100 Euro! Die neue Gaming-Area von Arcor - ?ber 50 Onlinespiele im Angebot. http://www.arcor.de/rd/emf-gaming-1
