Optimization for connection establishment

[shangfufei]

Under the mode of RDMA communication, this modification can improve the efficiency of establishing connections and improve the success rate of connection establishment.

#16006
Signed-off-by: shangfufei shangfufei@inspur.com

[shangfufei]

#16006
Revert clean_up, that will be fixed later. This application will only submit other codes to optimize connect establishment.
@yuyuyu101 , please review

[amitkumar50]

I believe comparion operator takes more assembly code+processor cycles wrt negation operation or simply
we can replace this code with if(connected).

For comparison connected has to be created bitwise on memory then 1 has to be created bitwise on memory. Then both need to compared bit-by-bit.
But for if(connected) only connected is created on memory and navigated once.

I believe 3 machine cycles are extra used for comparing with 1.

Even comparing with constants is not good for future enhancements and tracking.