若设为「Auto」,BIOS会依据CPU规格设置此数值。 & Power Limit TDP (Watts) / Power Limit Time 这些选项提供您设置CPU、平台或内存加速模式时的功耗极限以及停留在设置极限的时间长度。若设为「Auto」,BIOS会依据CPU规格设置此数值。此选项只有在「Turbo Power Limits」设为「Enabled」时,才能开放设置。 & Core ...
MSR 0x610 contains both power limits, PL1 and PL2. Intel is nice enough to publicly document this register. Setting bit[63] locks this register so it cannot be changed. Linux has command line tools to change MSR values so you are set....
MSR_TURBO_POWER_CURRENT_LIMIT 0x1AC The public documentation explains the two values, TDP and TDC, that are contained in this register. TDP is the power limit which is used to control Intel Turbo Boost and TDC is the current limit. Just like ...
不过,cpupower frequency-info 是通过intel_pstate驱动来获取信息的,所以如果使用 echo off |sudo tee /sys/devices/system/cpu/intel_pstate/status 禁用了intel_pstate驱动,则该指令失效。 可以通过cpupower monitor指令来获取CPU主频,该指令是直接读取MSR 198H 来直接获取CPU主频信息,所以即使禁用了intel_pstate...
static void dump_turbo_ratio_limits(int family, int model) { unsigned long long msr, core_counts; unsigned int ratio, group_size; int shift;get_msr(base_cpu, MSR_TURBO_RATIO_LIMIT, &msr); fprintf(outf, "cpu%d: MSR_TURBO_RATIO_LIMIT: 0x%08llx\n", base_cpu, msr); ...
I had one Xeon E5 v3 node with a cooling problem, and found that the processors were throttled by hitting the temperature limit long before they were throttled due to power limits. Since a significant portion of the power consumption under heavy load is due to leakage current (which...
It's possible that the EC locked your power limit 4 (current limit) setting to a value smaller than PL1, PL2. sudo modprobe msr insert the MSR kernel module by the command above or you can also load it on boot with kernel parameters. then put these into your .bashrc or .zshrc depend...
MSR_TURBO_RATIO_LIMIT can only be used to specify a *lower* maximum Turbo frequency for each core count. The HW will pick the lower of the default (power-on) value and the programmed value. What is running on the "core under load"? Several ideas come to mind: It is not do...
Turbo Boost Switcher along with the computer grounded to a power strip from Supra (with filtration & is shielded) is my best solution to reduce electromagnetic field around my workspace. With turbo boost off, the spikes on the mains are reduced to a minimum which has as much effect as the...
Those limits are shared with manufacturers who then spec power supplies, cooling systems and cases that can handle those CPUs. In the old days this was pretty simple, you had a single core and a single thermal design point (TDP) that you had to hit. Then multicore CPUs came around and ...