如何测试Socket的速度？

发布于 2024-10-09 01:16:29 字数 49 浏览 1 评论 0原文

我写了一个程序，可以在2个服务器之间转发ip数据包，那么如何测试程序的速度呢？谢谢！

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回心转意 2024-10-16 01:16:29

您的潜在用户可能会对许多通信指标感兴趣。

延迟是发送消息的时间量，对于共置设备通常以微秒为单位，对于所有其他情况以毫秒为单位。它通常被称为“零字节延迟”，意思是传输消息的元数据所需的时间。越低越好。

带宽以每秒位数来衡量。它通常被称为“峰值带宽”，可以通过在线发送大量数据来获得。越高越好。

CPU 利用率是传输消息所需的 CPU 时间的百分比。可以卸载消息传输的网络协议利用率较低，这意味着通信可以“重叠”用户应用程序中的某些其他计算，从而具有隐藏延迟的效果。越低越好。

所有这些都可以通过 ping 测试的变体来测量，通常称为“ping-pong”：

Node 1:
    for n = 1 to MAXSIZE, step via n*=2
    send message of size n bytes
    receive a response of size n bytes

Node 2:
    for n = 1 to MAXSIZE, step via n*=2
    receive a message of size n bytes
    send response of size n bytes

还有一个“ping-ping”测试，其中两个节点在同一时间。这需要设置非阻塞通信。

只需输出n以及每次迭代所需的时间。第一次是零字节延迟。最大的可持续n/时间是带宽（转换为每秒位数以成为行业标准）。您还可以测量运行较大迭代所需的 CPU 利用率，但这对于完全不同的问题来说是一个棘手的话题。

There are a number of communication metrics that may be of interest to your potential users.

Latency is the amount of time to send a message, usually quoted in microseconds for co-located devices and in milliseconds for all other scenarios. It is usually quoted as the "zero-byte latency", meaning the time required to transmitted the meta-data of a message. Lower is better.

Bandwidth is measured in bits per second. It is often quoted as "peak bandwidth" and can be obtained by sending a massive amount of data over the line. Higher is better.

CPU utilization is the percent of CPU time required to transmit a message. Network protocols that can offload a message's transmission have low utilization, which means that the communication can "overlap" some other computation in the user's application, which has the effect of hiding latency. Lower is better.

All of these are measured simply by a variation of the ping test, usually called the "ping-pong":

Node 1:
    for n = 1 to MAXSIZE, step via n*=2
    send message of size n bytes
    receive a response of size n bytes

Node 2:
    for n = 1 to MAXSIZE, step via n*=2
    receive a message of size n bytes
    send response of size n bytes

There's also a "ping-ping" test, in which both nodes write to each other at the same time. This requires non-blocking communication to set-up.

Just output n and the time required for each iteration. The first time is the zero-byte latency. The largest sustainable n/time is the bandwidth (convert to bits per second to be industry standard). You can also measure the CPU utilization required to run the larger iterations, but that's a tricky topic for a whole different question.

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