Thread: pgsql: Don't use a non-locked pre-test of the spinlock on x86_64

pgsql: Don't use a non-locked pre-test of the spinlock on x86_64

From

tgl@svr1.postgresql.org (Tom Lane)

Date:

11 October 2005, 17:01:36

Log Message:
-----------
Don't use a non-locked pre-test of the spinlock on x86_64 machines.
The pre-test has been shown to be a big loss on Opterons and at best a
wash on EM64T.

Modified Files:
--------------
    pgsql/src/include/storage:
        s_lock.h (r1.140 -> r1.141)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/storage/s_lock.h.diff?r1=1.140&r2=1.141)