Recently in do a network communication UDP communication, receiving 20000 * 3 packets per second, receiving and sending the same number, accept the 1024 bytes of data per package, sent 20 bytes of data per package,
Now the problem is to receive soon, recvfrom function has more than five percent CPU, but send sendto function, more than thirty percent of the CPU, and hair is much slower than closed, cannot be synchronized,
Never found the reason, because the card itself is the case, or function I use wrong, please understand the master

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