chuanyuxue / udp-latency

A single Python file network latency testing tool by UDP.

Hi there!

🧑🏽‍💻 I am currently working on the following projects:

• 🔬 R&D on Time-Sensitive Networking:
  1. TSNKit: A simple scheduling toolkit and benchmark for Time-Sensitive Networking.
  2. RtGen: A deterministic traffic generator based on kernel/DPDK and NIC offloading function.
• 🪐 NASA-RETHi-DataSystem: Developing Resilient Extra-Terrestrial Habitat

🤷 Some small tools from me:

• 🧸 Learning Python the Smart Way: An efficient and joyful way to learn Python language [中文]
• 📈 udp-latency: A tiny end-to-end latency testing tool implemented by UDP protocol in Python
• 📐 mvtest: A Distribution-Free Test of Independence Based on Mean Variance Index
• 🐶 doit4u: ChatGPT based natural language hybrid Python programming
• 🦭 sealhacker: Extracting seal with Python OpenCV.
• 🎨 Morandi palette: 18 colors palette inspired by Giorgio Morandi

udp-latency's Issues

quick question

Hi @ChuanyuXue, a quick question is what is the reason we choose socket instead of scapy to implement the udp latency? Thank you very much for your answering.

round-trip latency is similar to one-way latency

Hi @ChuanyuXue,

I got similar results when testing udp_rrt and udp_latency. It seems like division 2 of udp_rrt.py needs to be removed in the following function.

def listen(self, buffer_size: int, verbose: bool, save: Optional[str], q: Queue)-> None:
        latency = 0.0
        while True:
            msg, _ = self._udp_socket.recvfrom(buffer_size)
            recv_time = time.time_ns()
            packet_index = int.from_bytes(msg[:4], 'big')
            send_time = int.from_bytes(msg[4:12], 'big')
            old_latency = latency
            latency = round(((recv_time - send_time) * 1e-9) / 2, 6)
            jitter = abs(latency - old_latency)
            recv_size = len(msg)