我以1毫秒的间隔发送数据,但在接收端,我似乎一次收到15-16个数据包,然后在15-16毫秒延迟后收到另一组数据包
请尝试这段代码,看看是否有相同的结果。我使用的是Windows10机器。我在两台电脑上试过,结果都一样。如有任何见解,将不胜感激
# -*- coding: utf-8 -*-
"""
Created on Thu Sep 3 23:32:44 2020
@author: Pratyush
"""
# sender.py
import socket
from time import sleep,monotonic_ns
TEMPO = 1e6
send = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
last_second = monotonic_ns()
iteration_count = 0
while iteration_count < 1000:
if monotonic_ns() >= last_second + TEMPO:
last_second += TEMPO
send.sendto(bytes(32), ('127.0.0.1', 8208))
iteration_count += 1
接收器代码如下所示,首先运行receiver.py
# -*- coding: utf-8 -*-
"""
Created on Thu Sep 3 23:32:13 2020
@author: Pratyush
"""
# receiver2.py
import socket
import time
"""
just get the raw values from UDP socket every 1ms
The sender sends it with that temporal resolution
"""
UDP_IP = ""
UDP_PORT = 8208 #UDP phasor values 32 bytes (V,phi,P)
sock_ph = socket.socket(socket.AF_INET, # Internet
socket.SOCK_DGRAM) # UDP
sock_ph.bind((UDP_IP, UDP_PORT))
print("socket bound, waiting for data...")
while True:
time_before_raw = time.monotonic_ns()
raw = sock_ph.recv(32) #I am receiving 32 bytes data
time_after_raw = time.monotonic_ns()
# print((time_after_raw-time_before_raw),raw,len(raw))
print((time_after_raw-time_before_raw),len(raw))
我收到的结果如下:
0 32
0 32
16000000 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
15000000 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
0 32
根据PEP,Windows的单调时钟分辨率为15毫秒。很可能是您在输出中看到的粒度
https://www.python.org/dev/peps/pep-0564/#id23
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