diff options
| author | Andrew Pinski <apinski@cavium.com> | 2016-02-02 12:46:26 +0000 |
|---|---|---|
| committer | Jeff Vander Stoep <jeffv@google.com> | 2016-09-22 13:38:22 -0700 |
| commit | 6e1f8e3c0fb86a90fe98667cfa1be71957534c66 (patch) | |
| tree | eafde96ae6f14fc1d8a57d7670b9ce2096a75fda /kernel/power/user.c | |
| parent | 297bf83fa4e7804c28c6d950f39dbd3860552cb9 (diff) | |
UPSTREAM: 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>
Bug: 30369029
Patchset: kaslr-arm64-4.4
(cherry picked from commit 60e0a09db24adc8809696307e5d97cc4ba7cb3e0)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I3821a4d3a7b6fd68b4b0aca31478ec960e4e5172
Diffstat (limited to 'kernel/power/user.c')
0 files changed, 0 insertions, 0 deletions