cpu压力测试
对cpu进行压力测试
主要是想看一下压力测试时cpu的频率，看是否工作在性能模式。
备注： 对于x99主板，则同时可以检验一下鸡血bios是否生效
sysbench
安装sysbench：
sudo apt install sysbench
执行cpu压力测试：
sysbench cpu --threads=40 run
很欣喜的看到x99双路主板上两个e5 2666 v3 cpu在鸡血bios之后都可以跑在全核3.5G的频率：
cpufreq-info | grep "current CPU"
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.
current CPU frequency is 3.49 GHz.