On 12/19/2011 02:58 PM, Torvald Riegel wrote: > In the particular case (the validated loads technique used in > method-gl.cc, load(), store(), and validate()), we actually do not need > to have loads or stores to be really atomic, but need the compiler to > treat them as if they were atomics wrt. to reordering etc. (e.g., wrt. > adjacent fences). Right now, I'm relying on the fact that GCC doesn't > optimize atomics yet and am just using nonatomic loads/stores.
For 4.7, these accesses need to be volatile if they're to interact with the adjacent atomic ops. > Tested on x86 with STAMP and microbenchmarks. You could try testing on gcc110.fsffrance.org, a POWER7 machine. But other than the patch not being rebased vs master, it looks like an improvement overy my first attempt. r~
