Did I imagine this?
Probably not, as there are always improvements going on in the underlying driver/compiler.
Originally posted by: MicahVillmow Probably not, as there are always improvements going on in the underlying driver/compiler.
Actually, I thought so at first but.... Running a kernel under 9.4 with 4870 resulted in 0% cache hit, but running the same kernel under 9.10 with 3870 resulted in 75% cache hit (according to perf counters). BUT I ran the same kernel again under 9.10 with 4870 and that resulted in 0% cache hit again (consistent with 9.4)...
... so are the cache setups that much different from the 3870 to the 4870??