Hi all, This serial of patches introduces an accumulated power reporting algorithm. It will calculate the average power consumption for the processor. The cpu feature flag is CPUID.8000_0007H:EDX[12].
This algorithm is used to test the comparison of processor power consumption with between MWAITX delay and TSC delay on AMD Carrizo platforms. Reference: http://marc.info/?l=linux-kernel&m=143874573111310&w=2 Commit f96756 at tip ("x86/asm: Add MONITORX/MWAITX instruction support") Commit b466bd at tip ("x86/asm/delay: Introduce an MWAITX-based delay with a configurable timer") V1: http://marc.info/?l=linux-kernel&m=144066380613299&w=2 V2: http://marc.info/?l=linux-kernel&m=144531018518473&w=2 Changes from v1 -> v2: - Move fam15h_power_groups and fam15h_power_group into fam15h_power_data to avoid overwrite on multi-CPU system. - Rename FAM15H_MIN_NUM_ATTRS macro and fix return error code. - Remove unnecessary warning print. - Adds do_read_registers_on_cu to do all the read to all MSRs and run it on one of the online cores on each compute unit with smp_call_function_many(). - Use power1_average and power1_average_interval standard entry instread of power1_acc - Fix the CPU-hotplug case. Changes from v2 -> v3: - As Guenter's suggestion, remove typecast, use &data->groups[0]. - Remove all "fam15_power_*" prefix at data. - Remove unnecessary ( ). - Fix the issue that is reported by build test robot, and add CPU_SUP_AMD as the dependence of fam15h_power - Remove the WARN_ON at do_read_registers_on_cu, because it must be behind CPUID check. The MSR must be available since CPUID.8000_0007H:EDX[12] is set - Add get_online_cpus()/put_online_cpus() functions. - Refine commments and the method which generate cpumask for cu. - Add the interval scope to make the value suitable for user experience - Remove the useless mutex. A simple example: ray@hr-ub:~/tip$ sensors fam15h_power-pci-00c4 Adapter: PCI adapter power1: 23.73 mW (avg = 634.63 mW, interval = 0.01 s) (crit = 15.00 W) ... These patches are rebased on groeck/hwmon-next. Thanks, Rui Huang Rui (10): hwmon: (fam15h_power) Refactor attributes for dynamically added hwmon: (fam15h_power) Enable power1_input on AMD Carrizo hwmon: (fam15h_power) Add max compute unit accumulated power x86, amd: add accessor for number of cores per compute unit hwmon: (fam15h_power) Add CPU_SUP_AMD as the dependence hwmon: (fam15h_power) Add compute unit accumulated power hwmon: (fam15h_power) Add ptsc counter value for accumulated power hwmon: (fam15h_power) Introduce a cpu accumulated power reporting algorithm hwmon: (fam15h_power) Add documentation for TDP and accumulated power algorithm MAINTAINERS: change the maintainer of fam15h_power driver CREDITS | 8 ++ Documentation/hwmon/fam15h_power | 57 +++++++- MAINTAINERS | 4 +- arch/x86/include/asm/msr-index.h | 1 + arch/x86/include/asm/processor.h | 1 + arch/x86/kernel/cpu/amd.c | 19 ++- drivers/hwmon/Kconfig | 2 +- drivers/hwmon/fam15h_power.c | 278 +++++++++++++++++++++++++++++++++++---- 8 files changed, 341 insertions(+), 29 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
