15W 的 QPS 是怎么测试出来的？

[ghost]

我测试服务器安装了 dnspod-sr，使用 queryperf 单机测试只有 2W 多，请问 15W QPS 是怎么测试出来的？求大神们解惑。

dnspod-sr 服务器信息

lscpu

Architecture:          x86_64
CPU(s):                12
Thread(s) per core:    2
Core(s) per socket:    6
厂商 ID：           GenuineIntel
型号名称：        Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz

free -g

              total        used        free      shared  buff/cache   available
Mem:             31           5           0           0          25          24
Swap:            15           0          15

uname -a

Linux localhost 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

测试语句

生成 10W 个测试域名

for i in {1..100000}; do echo "d${i}.test.com. A" >> test.d; done
for i in {1..100000}; do echo "d${i}.test.com. 172800 IN A 192.168.0.${i}" >> root.z; done
./src/dnspod-sr

使用 bind-9.10.4-P2/contrib/queryperf 测试

./queryperf -s 192.168.0.21 -d test.d

DNS Query Performance Testing Tool
Version: $Id: queryperf.c,v 1.12 2007/09/05 07:36:04 marka Exp $

[Status] Processing input data
[Status] Sending queries (beginning with 192.168.0.21)
[Status] Testing complete

Statistics:

  Parse input file:     once
  Ended due to:         reaching end of file

  Queries sent:         100000 queries
  Queries completed:    100000 queries
  Queries lost:         0 queries
  Queries delayed(?):   0 queries

  RTT max:          0.002000 sec
  RTT min:              0.000055 sec
  RTT average:          0.000854 sec
  RTT std deviation:    0.000324 sec
  RTT out of range:     0 queries

  Percentage completed: 100.00%
  Percentage lost:        0.00%

  Started at:           Thu Sep 29 10:45:41 2016
  Finished at:          Thu Sep 29 10:45:45 2016
  Ran for:              4.502813 seconds

  Queries per second:   22208.339542 qps

[haipengz]

这张图已很明确标明：每秒请求数为30W时，dnspod-sr的每秒请求处理数达峰值约为15Wqps。

而楼主的测试：

总数为10W条，总时间为4.5s，平均下来性能为2.2Wqps。
综上：dnspod-sr的高性能表现在对大并发请求的处理上，即同测试条件下的服务器配置，解析请求数为30Wrps（每秒请求数）时，解析速度约为15Wqps。

[linkec]

top 看下queryperf 是不是100%CPU了，我之前压测的时候就是这样。