ÁõÓ¦½Ü wrote: > Hi > thanks you all. > finally,I known form ACPI Specification ,and get what does these words: > Pstate,Cstate,Gstate,State and Tstate mean. > as wang says,"It is kernel who put into some Cx state safely." I checked > the file "drivers/acpi/processor_idle.c" in kernel,and find > "acpi_processor_power_verify_cx" change the CPU cstate in final. > So any other driver who can can the funtion > "acpi_processor_power_verify_cx" is not safe,the kernel will be wakeup by > interrupt. > I checked the CPU cstate and pstate by the tool Power-top,and find the cpu > is always in C4(Deeper sleep)/P2(600MHz) when user have no opertions.so we > can get the cpu Actual power loss. > By the way,can anybody known how to test the notebook Power Loss,and what > mothed and tools. > thanks.
actually powertop cannot currently report the deepest C state number correctly, as the number is reported by the BIOS, and we've seen many BIOSes hide deeper C states. IOW your system may be in C6, but the BIOS only returns C4 to powertop. Auke _______________________________________________ Moblin dev Mailing List [email protected] To manage or unsubscribe from this mailing list visit: http://lists.moblin.org/listinfo/dev or your user account on http://moblin.org once logged in. For more information on the Moblin Developer Mailing lists visit: http://moblin.org/community/mailing-lists
