sorry, but why in the compiler and not as a library function like in libthread?
http://plan9.bell-labs.com/sources/plan9/sys/src/libthread/xinc386.s On Wed, Apr 28, 2010 at 4:16 PM, Venkatesh Srinivas <[email protected]> wrote: > Hi, > > A few months ago, I added a patch to inferno-npe to use LOCK XADD > instead of the current lock/add/unlock sequence for incref and decref: > (http://code.google.com/p/inferno-npe/source/detail?r=b83540e1e77e62a19cbd21d2eb54d43d338716a5 > and > http://code.google.com/p/inferno-npe/source/detail?r=82f13e6755218ecb7dec0f1392b2eb8bfe0bb2c7). > On a 2.66 GHz Core 2 Duo, we noticed a full 14% reduction in runtime > (9.6s vs 11.2s) of the thread-ring test. Similar performance gains > were noticed on a Core i7 machine, but I no longer have the numbers > handy. > > Perhaps this change is interesting for Plan 9... > > -- vs > > -- Federico G. Benavento
