On 4 April 2013 21:49, Jacob Shin <jacob.shin@xxxxxxx> wrote: > This patchset adds AMD specific powersave bias function to the ondemand > governor; which can be used to help ondemand governor make more power conscious > frequency change decisions based on feedback from hardware (availble on AMD > Family 16h and above). > > Hardware feedback tells software how "sensitive" to frequency changes the > workloads are. CPU-bound workloads will be more sensitive -- they will > perform better as frequency increases. Memory/IO-bound workloads will be less > sensitive -- they will not necessarily perform better as frequnecy increases. > > This patchset was compared against ondemand governor without powersave bias > and did not show any performance degradation on CPU-bound workloads such as > kernbench and unixbench. While saving power on Memory-bound workloads such as > stream. > > V4: > * Added proper documentation to Documentation/cpu-freq/ > * Revised so that when this driver loads, the feature is enabled by > default with a sane tunable value. > > V3: > * Added to CPUID bit to cpufeature.h > * Added MODULE_DEVICE_TABLE to autoload this driver. > * Other small changes per feedback from: > https://lkml.org/lkml/2013/4/2/349 > > V2: > * Added proper include files to amd_freq_sensitivity.c > * Only register powersave_bias_target function pointer and not the entire > od_ops. > > Jacob Shin (2): > cpufreq: ondemand: allow custom powersave_bias_target handler to be > registered > cpufreq: AMD "frequency sensitivity feedback" powersave bias for > ondemand governor > > Documentation/cpu-freq/governors.txt | 21 +++++ > arch/x86/include/asm/cpufeature.h | 1 + > arch/x86/kernel/cpu/scattered.c | 3 +- > drivers/cpufreq/Kconfig.x86 | 17 ++++ > drivers/cpufreq/Makefile | 1 + > drivers/cpufreq/amd_freq_sensitivity.c | 148 ++++++++++++++++++++++++++++++++ > drivers/cpufreq/cpufreq_governor.h | 4 + > drivers/cpufreq/cpufreq_ondemand.c | 56 ++++++++++-- > 8 files changed, 242 insertions(+), 9 deletions(-) > create mode 100644 drivers/cpufreq/amd_freq_sensitivity.c For the latest versions sent by you (including {get|put}_online_cpus()): Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
