linux压测

1.资源测试

CPU压测

stress --cpu 1 --timeout 600

IO压测

stress -i 1 --timeout 600

进程压测

# centos可能无法模拟，用stress-ng命令
stress -c 8 --timeout 600

stress-ng -i 1 --hdd 1 --timeout 600

上下文压测

sysbench --threads=10 --max-time=300 threads run

读写测试 FIO
https://github.com/iovisor/bcc

# 随机读
fio -name=randread -direct=1 -iodepth=64 -rw=randread -ioengine=libaio -bs=4k -size=1G -numjobs=1 -runtime=1000 -group_reporting -filename=/dev/sdb

# 随机写
fio -name=randwrite -direct=1 -iodepth=64 -rw=randwrite -ioengine=libaio -bs=4k -size=1G -numjobs=1 -runtime=1000 -group_reporting -filename=/dev/sdb

# 顺序读
fio -name=read -direct=1 -iodepth=64 -rw=read -ioengine=libaio -bs=4k -size=1G -numjobs=1 -runtime=1000 -group_reporting -filename=/dev/sdb

# 顺序写
fio -name=write -direct=1 -iodepth=64 -rw=write -ioengine=libaio -bs=4k -size=1G -numjobs=1 -runtime=1000 -g

2.网络测试

转发性能

# 开启内核模块
modprobe pktgen

# 执行shell脚本

# 定义一个工具函数，方便后面配置各种测试选项
function pgset() {
    local result
    echo $1 > $PGDEV

    result=`cat $PGDEV | fgrep "Result: OK:"`
    if [ "$result" = "" ]; then
         cat $PGDEV | fgrep Result:
    fi
}

# 为0号线程绑定eth0网卡
PGDEV=/proc/net/pktgen/kpktgend_0
pgset "rem_device_all"   # 清空网卡绑定
pgset "add_device eth0"  # 添加eth0网卡

# 配置eth0网卡的测试选项
PGDEV=/proc/net/pktgen/eth0
pgset "count 1000000"    # 总发包数量
pgset "delay 5000"       # 不同包之间的发送延迟(单位纳秒)
pgset "clone_skb 0"      # SKB包复制
pgset "pkt_size 64"      # 网络包大小
pgset "dst 192.168.0.30" # 目的IP
pgset "dst_mac 11:11:11:11:11:11"  # 目的MAC

# 启动测试
PGDEV=/proc/net/pktgen/pgctrl
pgset "start"

#查看结果
$ cat /proc/net/pktgen/eth0
Params: count 1000000  min_pkt_size: 64  max_pkt_size: 64
     frags: 0  delay: 5000  clone_skb: 0  ifname: eth0
     flows: 0 flowlen: 0
     queue_map_min: 0  queue_map_max: 0
     dst_min: 192.168.0.1  dst_max: 
     src_min:   src_max: 
     src_mac: 08:00:27:5d:27:25 dst_mac: 00:00:00:00:00:00
     udp_src_min: 9  udp_src_max: 9  udp_dst_min: 9  udp_dst_max: 9
     src_mac_count: 0  dst_mac_count: 0
     Flags: 
Current:
     pkts-sofar: 54841  errors: 0
     started: 5169978645us  stopped: 5172387908us idle: 8624us
     seq_num: 54842  cur_dst_mac_offset: 0  cur_src_mac_offset: 0
     cur_saddr: 10.0.2.15  cur_daddr: 192.168.0.1
     cur_udp_dst: 9  cur_udp_src: 9
     cur_queue_map: 0
     flows: 0
Result: OK: 2409262(c2400638+d8624) usec, 54841 (64byte,0frags)
  22762pps 11Mb/sec (11654144bps) errors: 0

结果在result里面，pps为22k，吞吐量为11Mb/s

TCP/UDP测试

yum install iperf3

# 启动服务端
iperf3 -s -i 1 -p 10000
# 另外一台运行客户端
iperf3 -c 192.168.0.30 -b 1G -t 15 -P 2 -p 10000

结果
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-15.00  sec  54.8 MBytes  30.6 Mbits/sec    0             sender
[  4]   0.00-15.00  sec  54.4 MBytes  30.4 Mbits/sec                  receiver
[  6]   0.00-15.00  sec  86.5 MBytes  48.4 Mbits/sec    0             sender
[  6]   0.00-15.00  sec  85.9 MBytes  48.1 Mbits/sec                  receiver
[SUM]   0.00-15.00  sec   141 MBytes  79.0 Mbits/sec    0             sender
[SUM]   0.00-15.00  sec   140 MBytes  78.5 Mbits/sec                  receiver

吞吐量为140M/s

http压测(ab)

# -c表示并发请求数为1000，-n表示总的请求数为10000
$ ab -c 1000 -n 10000 http://192.168.0.30/
...
Server Software:        nginx/1.15.8
Server Hostname:        192.168.0.30
Server Port:            80

...

Requests per second:    1078.54 [#/sec] (mean)
Time per request:       927.183 [ms] (mean)
Time per request:       0.927 [ms] (mean, across all concurrent requests)
Transfer rate:          890.00 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   27 152.1      1    1038
Processing:     9  207 843.0     22    9242
Waiting:        8  207 843.0     22    9242
Total:         15  233 857.7     23    9268

Percentage of the requests served within a certain time (ms)
  50%     23
  66%     24
  75%     24
  80%     26
  90%    274
  95%   1195
  98%   2335
  99%   4663
 100%   9268 (longest request)

Transfer rate 表示吞吐量（BPS）为 890 KB/s。

http压测(wrk)

# -c表示并发连接数1000，-t表示线程数为2
$ wrk -c 1000 -t 2 http://192.168.0.30/
Running 10s test @ http://192.168.0.30/
  2 threads and 1000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    65.83ms  174.06ms   1.99s    95.85%
    Req/Sec     4.87k   628.73     6.78k    69.00%
  96954 requests in 10.06s, 78.59MB read
  Socket errors: connect 0, read 0, write 0, timeout 179
Requests/sec:   9641.31
Transfer/sec:      7.82MB