前言

话说，一年前项目响应时代的号召，引入了 Istio，从此如刘备得卧龙、凤雏，走上了 Service Mesh 的光辉大道。现到准备益州之战(上线)之时。上线前，还得评估一下性能变化。

CPU Benchmark

The SysBench system benchmark suite has a simple CPU benchmark tool that calculates prime numbers. For example:

# sysbench --num-threads=8 --test=cpu --cpu-max-prime=100000 run
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 8

Doing CPU performance benchmark

Threads started!
Done.

Maximum prime number checked in CPU test: 100000

Test execution summary:
    total time:                          30.4125s
    total number of events:              10000
    total time taken by event execution: 243.2310
    per-request statistics:
         min:                                 24.31ms
         avg:                                 24.32ms
         max:                                 32.44ms
         approx.  95 percentile:              24.32ms

Threads fairness:
    events (avg/stddev):           1250.0000/1.22
    execution time (avg/stddev):   30.4039/0.01

This executed eight threads, with a maximum prime number of 100,000. The runtime was 30.4 s, which can be used for comparison with the results from other systems or configurations (assuming many things, such as that identical compiler options were used to build the software; see Chapter 12, Benchmarking).