From: Richard Henderson <[email protected]>
Date: Sat, 17 Dec 2005 14:38:24 -0800
> You might consider just beginning your loops like
>
> mov zero, old
> cas [mem], zero, old
>
> to do the initial read, since old will now contain the
> contents of the memory, and we havn't changed the memory.
CAS is 32 cycles minimum on sparc64 even on a cache hit, so I think
the prefetch+load will be faster :-) But it deserves checking out,
that's for sure.
Either way, that is a clever use of CAS :)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
