所以这是一台老式机器 Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz 但它应该达到 2.8GHz
如果我“观察”这个，它与 798MHz 相比并没有真正改变太多：
# cat /proc/cpuinfo | grep "^[c]pu MHz"
cpu MHz : 798.204
cpu MHz : 798.254
cpu MHz : 798.213
cpu MHz : 798.210
cpu MHz : 798.213
cpu MHz : 798.225
cpu MHz : 798.265
cpu MHz : 798.356
...即使我将单线程负载放在：
$ echo "scale=10000; 4*a(1)" | bc -l
i7z 显示的是这样的：
Cpu speed from cpuinfo 1995.00Mhz
cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc
Linux's inbuilt cpu_khz code emulated now
True Frequency (without accounting Turbo) 1995 MHz
CPU Multiplier 20x || Bus clock frequency (BCLK) 99.75 MHz
Socket [0] - [physical cores=4, logical cores=8, max online cores ever=4]
TURBO ENABLED on 4 Cores, Hyper Threading ON
Max Frequency without considering Turbo 2094.75 MHz (99.75 x [21])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 29x/28x/26x/26x
Real Current Frequency 798.34 MHz [99.75 x 8.00] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 % Temp VCore
Core 1 [0]: 798.34 (8.00x) 8.94 95.4 1 0 58 0.7455
Core 2 [2]: 797.79 (8.00x) 9.02 95.3 1.05 0 55 0.7455
Core 3 [4]: 797.97 (8.00x) 13.4 93.6 1 1.49 0 54 0.7505
Core 4 [6]: 797.96 (8.00x) 10.2 94.9 1 0 53 0.7505
……难不成是要死了？