[Xorp-hackers] XRL performance: UNIX domain sockets vs TCP sockets

[Bruce Simpson]

Bruce Simpson wrote:
> Ben Greear wrote:
>>>
>>> UNIX domain sockets can be used in XRL as it stands, by passing 'env
>>> XORP_PF=x', without any patches.
>>
>> If these are faster, why not use them by default?
>
> How about this? 'scons check' runs to completion.

This is bork, because 'unix_socket' is never ignored as a compile-time 
default; the environment needs to be checked in all cases.

xrl_std_router.cc needs this diff chunk instead. Hitting getenv() twice 
in one shot isn't too bad, can clean up later, after feedback.

XrlStdRouter is not something which gets constructed a lot; typically 
once per process. libfeaclient, however, will build its own, 
independently of anything else the process is doing.

Using the attached script revealed this relatively quickly. BTW: I've 
seen the performance difference fall to around 15%. I was getting up to 
30% faster than TCP in some situations.

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