sysbench
Sysbench is mainly intended for doing database benchmarking. However it includes options to test CPU, memory and file throughput as well.
安装
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| sudo apt install sysbench
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使用
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| ubuntu@instance:~$ sysbench cpu --threads=3 run
sysbench 1.0.18 (using system LuaJIT 2.1.0-beta3)
Running the test with following options:
Number of threads: 3
Initializing random number generator from current time
Prime numbers limit: 10000
Initializing worker threads...
Threads started!
CPU speed:
events per second: 10519.03
General statistics:
total time: 10.0003s
total number of events: 105208
Latency (ms):
min: 0.28
avg: 0.28
max: 5.22
95th percentile: 0.29
sum: 29976.02
Threads fairness:
events (avg/stddev): 35069.3333/81.99
execution time (avg/stddev): 9.9920/0.00
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events per second，值越大，性能越强。
上面是一个Oracle主机的测试结果，3个OCPU，每秒事件10519。单个OCPU每秒事件数为3484。i7-7700 CPU，单核每秒事件数1438，8核每秒事件数8469。可见Oracle主机的OCPU性能很强，单核性能是 i7-7700 的2.4倍。
7z
7z是个压缩/解压工具，压缩/解压天然吃CPU，用来测试性能顺理成章。而且官方还给出了一些CPU型号的测试结果排名：7-Zip LZMA Benchmark (7-cpu.com)
安装
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| sudo apt install p7zip-full
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使用
语法：
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| 7z b [number_of_iterations] [-mmt{N}] [-md{N}] [-mm={Method}]
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- number_of_iterations 迭代次数，测试多少轮，可用于检查内存错误
- mmt 线程数
举例：
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| # 单线程
$ 7z b -mmt1
# 多线程
$ 7z b
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结果说明：
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| ubuntu@instance:~$ 7z b
7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=C.UTF-8,Utf16=on,HugeFiles=on,64 bits,3 CPUs LE)
LE
CPU Freq: - - - - - - 512000000 - -
RAM size: 17954 MB, # CPU hardware threads: 3
RAM usage: 441 MB, # Benchmark threads: 3
Compressing | Decompressing
Dict Speed Usage R/U Rating | Speed Usage R/U Rating
KiB/s % MIPS MIPS | KiB/s % MIPS MIPS
22: 8642 175 4813 8407 | 98748 199 4227 8431
23: 8612 187 4695 8775 | 97477 200 4228 8438
24: 8438 196 4622 9073 | 95682 200 4201 8400
25: 8151 198 4694 9307 | 93742 200 4176 8344
---------------------------------- | ------------------------------
Avr: 189 4706 8891 | 200 4208 8403
Tot: 194 4457 8647
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上面是Orace OCPU的测试结果，单核4706。i7-7700单核3768。
- Dict：字典大小，22表示2^21=4MB
- Usage：cpu总利用率。我有3个核，这里最多只用到200%，这是因为7z似乎只能使用
2N个核（来源“When you specify (N*2) threads for test, the program creates N copies of LZMA encoder, and each LZMA encoder instance compresses separated block of test data.”——7-Zip LZMA Benchmark (7-cpu.com)） - **MIPS：**million instructions per second
- R/U MIPS：单核性能。
- Rating MIPS：约等于
Usage * (R/U MIPS)
更多介绍，查看帮助文档。man 7z，在最下面会看到：
HTML Documentation
/usr/share/doc/p7zip-full/DOC/MANUAL/start.htm
用vim或者浏览器打开此页面进入帮助文档主页。或直接打开以下页面查看benchmark相关内容：
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| chrome /usr/share/doc/p7zip/DOC/MANUAL/cmdline/commands/bench.htm
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数值运算
比如写个python脚本：
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| import math
import time
t0 = time.time()
for i in range(0, 10000000):
math.pow(47,39)
print(time.time() - t0)
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将该脚本在不同的CPU上执行，通过对比运行时间，估计待测CPU的性能。