Gabriel Paubert wrote: > On Tue, Sep 04, 2007 at 12:09:22PM +0100, Matt Sealey wrote: >> Hi guys, >> >> The Solaris PPC code drop included most of these functions for 32-bit ops on >> 32-bit PPC architectures but the 64-bit operations are not present. What I >> a not clear on is the operation of lwarx and stwcx. and if they will work if >> you are doing operations on two words at a time. > > No. There is a single reservation for a single word.
This is what I gathered from the programming environments manual at least. > the 64 bit operations inside a spinlock on PPC32, and then select the > number /location of spinlock(s) based on your needs, from one global > per machine to one per 64 bit variable if you find excessive contention. Okay that makes sense, but it would have to be a super global big lock, I don't think the code is there in ZFS to give every 64-bit variable it's own dedicated spinlock (kind of an overhaul) and I'm trying to be fast.. -- Matt Sealey <[EMAIL PROTECTED]> Genesi, Manager, Developer Relations _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
