On Tue, Apr 21, 2020 at 02:48:04PM +0200, Vlastimil Babka wrote: > On 4/21/20 2:47 PM, Vlastimil Babka wrote: > > > > It was suspected that current Intel can prefetch forward and backwards, and the > > tested ARM64 microarchitecture only backwards, can it be true? The current code > > Oops, tested ARM64 microarchitecture I meant "only forwards". I'd be surprised if that's the case, but it could be that there's an erratum workaround in play which hampers the prefetch behaviour. We generally try not to assume too much about the prefetcher on arm64 because they're not well documented and vary wildly between different micro-architectures. Will
