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| author |   Damjan Marion <damarion@cisco.com> | 2018-09-02 11:16:00 +0200 |
|---|---|---|
| committer | Damjan Marion <damarion@cisco.com> | 2018-09-02 11:24:12 +0200 |
| commit | edc4387602eb935c6e1702a713f0a5665c12d467 (patch) | |
| tree | 6890cba4b9a494c56cc16db44d046e7ae2fb4d2d /src/cmake/cpu.cmake | |
| parent | cc4eb994e4a8a8c4a32beb64a9928c657e9cf60e (diff) | |
cmake: cache line size detection
Change-Id: I9a0df8d15deefdf31cfead56c96433cd7220b802
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/cmake/cpu.cmake')
| -rw-r--r-- | src/cmake/cpu.cmake | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake index 0e1171de3ea..1439be1db29 100644 --- a/src/cmake/cpu.cmake +++ b/src/cmake/cpu.cmake @@ -12,6 +12,41 @@ # limitations under the License. ############################################################################## +# Cache line size detection +############################################################################## +if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)") + file(READ "/proc/cpuinfo" cpuinfo) + string(REPLACE "\n" ";" cpuinfo ${cpuinfo}) + foreach(l ${cpuinfo}) + string(REPLACE ":" ";" l ${l}) + list(GET l 0 name) + list(GET l 1 value) + string(STRIP ${name} name) + string(STRIP ${value} value) + if(${name} STREQUAL "CPU implementer") + set(CPU_IMPLEMENTER ${value}) + endif() + if(${name} STREQUAL "CPU part") + set(CPU_PART ${value}) + endif() + endforeach() + # Implementer 0x0a1 - Cavium + # Part 0x0a1 - ThunderX + if (${CPU_IMPLEMENTER} STREQUAL "0x43" AND ${CPU_PART} STREQUAL "0x0a1") + set(VPP_LOG2_CACHE_LINE_SIZE 7) + else() + set(VPP_LOG2_CACHE_LINE_SIZE 6) + endif() + math(EXPR VPP_CACHE_LINE_SIZE "1 << ${VPP_LOG2_CACHE_LINE_SIZE}") + message(STATUS "ARM AArch64 CPU implementer ${CPU_IMPLEMENTER} part ${CPU_PART} cacheline size ${VPP_CACHE_LINE_SIZE}") +else() + set(VPP_LOG2_CACHE_LINE_SIZE 6) +endif() + +set(VPP_LOG2_CACHE_LINE_SIZE ${VPP_LOG2_CACHE_LINE_SIZE} + CACHE STRING "Target CPU cache line size (power of 2)") + +############################################################################## # CPU optimizations and multiarch support ############################################################################## if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*") |