tree 6fd24b7c6fa67a31225a1528b0e2b8ee11b1bbd0
parent 6e4a0f2b5c56af6be43b546df16b1ece7df537d8
author Tirumalesh Chalamarla <tchalamarla@cavium.com> 1442944788 +0200
committer Catalin Marinas <catalin.marinas@arm.com> 1446059357 +0000

arm64: Increase the max granular size

Increase the standard cacheline size to avoid having locks in the same
cacheline.

Cavium's ThunderX core implements cache lines of 128 byte size. With
current granulare size of 64 bytes (L1_CACHE_SHIFT=6) two locks could
share the same cache line leading a performance degradation.
Increasing the size fixes that.

Increasing the size has no negative impact to cache invalidation on
systems with a smaller cache line. There is an impact on memory usage,
but that's not too important for arm64 use cases.

Signed-off-by: Tirumalesh Chalamarla <tchalamarla@cavium.com>
Signed-off-by: Robert Richter <rrichter@cavium.com>
Acked-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>