SSL write/read performance
valmikibow at gmail.com
Wed Apr 10 09:32:01 UTC 2019
I'm trying to understand server and client code over tcp using openssl.
How does the flow work when we do SSL_write or SSL_read.
SSL_write -> send buffer to kernel crypto subsystem -> take encrypted buffer and send it over network socket.
Is the above understanding correct ?
If its correct we have following context switch from user to kernel space and vice versa
-> open ssl libary to kernel crypto subsystem
-> kernel crypto subsystem to ssl library
-> ssl library to network subsystem
Does this mean for sending a buffer we need to three context switches from user to kernel and vice versa ?
Doesn't this effect performance ?
Please correct me if my understanding is wrong.
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