TCPkali是一個快速多核的TCP和WebSockets負載生成器。

快速示例: 測試一個Web服務器

tcpkali -em "GET / HTTP/1.1\r\nHost: google.com\r\n\r\n" -r 10 --latency-marker "HTTP/1.1" google.com:80
tcpkali --connections 10000 yahoo.com:80 google.com:80
tcpkali -c 10000 yahoo.com:80 google.com:80

特性：

• 高效的多核操作：默認使用所有可用的CPU核數
• 允許打開數量龐大的連接 (--connections)
• 允許限制單個連接的吞吐量 (--channel-bandwidthor--message-rate)
• Allows specifying the first and subsequent messages (--message,--first-message).
• Measures response latency percentiles using HdrHistogram (--latency-marker)
• Sends stats to StatsD/DataDog (--statsd)

用法：

Usage: tcpkali [OPTIONS] <host:port> [<host:port>...]
Where OPTIONS are:
  -h, --help                  Print this help screen, then exit
  --version                   Print version number, then exit
  --verbose <level=1>         Verbosity level [0..3]

  --ws, --websocket           Use RFC6455 WebSocket transport
  -c, --connections <N=1>     Connections to keep open to the destinations
  --connect-rate <R=100>      Limit number of new connections per second
  --connect-timeout <T=1s>    Limit time spent in a connection attempt
  --channel-lifetime <T>      Shut down each connection after T seconds
  --channel-bandwidth <Bw>    Limit single connection bandwidth
  -l, --listen-port <port>    Listen on the specified port
  -w, --workers <N=24>        Number of parallel threads to use
  -T, --duration <T=10s>      Load test for the specified amount of time

  -e, --unescape-message-args Unescape the following {-m|-f|--first-*} arguments
  --first-message <string>    Send this message first, once
  --first-message-file <name> Read the first message from a file
  -m, --message <string>      Message to repeatedly send to the remote
  -f, --message-file <name>   Read message to send from a file
  -r, --message-rate <R>      Messages per second to send in a connection

  --statsd                    Enable StatsD output (default disabled)
  --statsd-host <host>        StatsD host to send data (default is localhost)
  --statsd-port <port>        StatsD port to use (default is 8125)
  --statsd-namespace <string> Metric namespace (default is "tcpkali")

  --latency-marker <string>   Measure latency using a per-message marker

And variable multipliers are:
  <R>:  k (1000, as in "5k" is 5000)
  <Bw>: kbps, Mbps (bits per second), kBps, MBps (bytes per second)
  <T>:  ms, s, m, h, d (milliseconds, seconds, minutes, hours, days)

項目主頁：http://www.baiduhome.net/lib/view/home/1423097973670