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(parent: 2cdace9) | patch

author	Tom Lane <tgl@sss.pgh.pa.us>
	Sat, 27 Dec 2003 20:58:58 +0000 (20:58 +0000)
committer	Tom Lane <tgl@sss.pgh.pa.us>
	Sat, 27 Dec 2003 20:58:58 +0000 (20:58 +0000)
commit	f8eed65dfb580f0971e2e6ead83135bfa3ddeb06
tree	5fd8b3b152cfa785e14a4489b628081a67dcf2d9	tree
parent	2cdace962b5fd56a4bd2fae1c1ba6e99434f33f3	commit \| diff

Improve spinlock code for recent x86 processors: insert a PAUSE
instruction in the s_lock() wait loop, and use test before test-and-set
in TAS() macro to avoid unnecessary bus traffic. Patch from Manfred
Spraul, reworked a bit by Tom.

src/backend/storage/lmgr/s_lock.c		diff \| blob \| blame \| history
src/include/storage/s_lock.h		diff \| blob \| blame \| history

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