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H A D | copy_page.S | 60e0a09d Tue Feb 02 06:46:26 CST 2016 Andrew Pinski <apinski@cavium.com> arm64: lib: patch in prfm for copy_page if requested
On ThunderX T88 pass 1 and pass 2, there is no hardware prefetching so we need to patch in explicit software prefetching instructions
Prefetching improves this code by 60% over the original code and 2x over the code without prefetching for the affected hardware using the benchmark code at https://github.com/apinski-cavium/copy_page_benchmark
Signed-off-by: Andrew Pinski <apinski@cavium.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Tested-by: Andrew Pinski <apinski@cavium.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 60e0a09d Tue Feb 02 06:46:26 CST 2016 Andrew Pinski <apinski@cavium.com> arm64: lib: patch in prfm for copy_page if requested On ThunderX T88 pass 1 and pass 2, there is no hardware prefetching so we need to patch in explicit software prefetching instructions Prefetching improves this code by 60% over the original code and 2x over the code without prefetching for the affected hardware using the benchmark code at https://github.com/apinski-cavium/copy_page_benchmark Signed-off-by: Andrew Pinski <apinski@cavium.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Tested-by: Andrew Pinski <apinski@cavium.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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