Re: solaris build problem with Sun compilers

Tom Lane wrote:
> Alan Stange <stange@rentec.com> writes:
>> I took a look at backend/port/tas/solaris_sparc.s file.  Isn't that code
>> a bit longer than needed?
>
> It's already been rewritten in HEAD; uses "cas" now.

Hmmm.   I've just been looking at the last snapshot of the HEAD and
s_lock.h is still using an ldstub instruction instead of a cas for the
inlined tas() function when gcc is being used.   Having a cas
instruction here would probably be an improvement too, right?


Finally, I noticed that pg_sleep is calling select() for a sleep.  On
Solaris, this is a fairly expensive way to get off the run queue
compared to just calling nanosleep().   How often do backends go to
sleep here under "typical" workloads?  Yes, I know this is a somewhat
crazy question, I'm just trying to get a sense of how "hot" this code
path is.

Thanks!

-- Alan