gitee.com/woood2/luca@v1.0.4/test/ab.md (about)

     1  ### 测试环境
     2  
     3  硬件：mac pro 16, 2019 （6核intel i7，16G 内存）  
     4  web框架：在gin基础上追加了
     5  - access日志
     6  - prometheus metrics
     7  - zipkin（关闭Reporter）
     8  
     9  ### mac os
    10  
    11  -c 50
    12  ```
    13  ab -n 10000 -c 50 localhost:8080/hello
    14  Requests per second:    18145.43 [#/sec] (mean)
    15  Requests per second:    513.93 [#/sec] (mean)
    16  ```  
    17  
    18  -c 100
    19  ```
    20  ab -n 10000 -c 100 localhost:8080/hello
    21  Requests per second:    17293.17 [#/sec] (mean)
    22  Requests per second:    773.79 [#/sec] (mean)
    23  ```
    24  
    25  -c 200
    26  ```
    27  ab -c 200 -n 10000 localhost:8080/hello
    28  Benchmarking localhost (be patient)
    29  apr_socket_recv: Connection reset by peer (54)
    30  Total of 427 requests completed
    31  ```
    32  
    33  backlog=256
    34  ```
    35  sudo sysctl -w kern.ipc.somaxconn=256
    36  kern.ipc.somaxconn: 128 -> 256
    37  
    38  重启go进程
    39  ```
    40  
    41  再试 -c 200
    42  ```
    43  ab -c 200 -n 10000 localhost:8080/hello
    44  Requests per second:    12070.24 [#/sec] (mean)
    45  Requests per second:    479.41 [#/sec] (mean)
    46  ```
    47  
    48  backlog=2048
    49  ```
    50  sudo sysctl -w kern.ipc.somaxconn=2048
    51  kern.ipc.somaxconn: 256 -> 2048
    52  
    53  重启go进程
    54  ```
    55  
    56  -c 2000
    57  ```
    58  ab -c 2000 -n 10000 localhost:8080/hello
    59  Requests per second:    3608.77 [#/sec] (mean)
    60  Requests per second:    419.56 [#/sec] (mean)
    61  ```
    62  
    63  分析
    64  ```
    65  第一次ab，速度很快；第二次ab，总是执行到一半卡住  
    66  检查pprof，未显示异常  
    67  活动监视器，kernel_task占用最多cpu和磁盘，WindowServer占用内存20G，swap 8G
    68  ```
    69  
    70  重启mac
    71  
    72  ```
    73  WindowServer占用内存400M，swap清零
    74  
    75  ab -c 2000 -n 10000 localhost:8080/hello
    76  Requests per second:    5306.58 [#/sec] (mean)
    77  Requests per second:    380.10 [#/sec] (mean)
    78  
    79  问题依旧。cpu、内存、磁盘开销很低
    80  ```
    81  
    82  在 VMWare centos 7 中运行gin
    83  
    84  ```
    85  问题依旧。cpu、内存开销很低
    86  ```
    87  
    88  在 VMWare centos 7 中运行ab -c 50
    89  ```
    90  ab -c 50 -n 10000 localhost:8080/hello
    91  Requests per second:    10722.49 [#/sec] (mean)
    92  Requests per second:    10732.86 [#/sec] (mean)
    93  Requests per second:    11029.51 [#/sec] (mean)
    94  
    95  问题是 mac中 运行ab导致的
    96  ```
    97  
    98  在 VMWare centos 7（192.168.100.4） 中运行ab -c 2000  
    99  ```
   100  cat /proc/sys/net/core/somaxconn
   101  128
   102  
   103  cat /proc/sys/net/ipv4/tcp_max_syn_backlog
   104  128
   105  
   106  ab -c 2000 -n 10000 localhost:8080/hello
   107  Complete requests:      10000
   108  Failed requests:        0
   109  Requests per second:    11560.64 [#/sec] (mean)
   110  
   111  ab -c 10000 -n 10000 localhost:8080/hello
   112  Requests per second:    9883.44 [#/sec] (mean)
   113  
   114  ab -c 10000 -n 10000 192.168.100.4:8080/hello
   115  Requests per second:    9803.96 [#/sec] (mean)
   116  ```
   117  
   118  分析
   119  ```
   120  centos7 上执行ab，似乎不受 backlog限制影响
   121  这与hermes项目的测试体验不一致 @todo 验证
   122  ```