diff options
Diffstat (limited to 'src/cmake/cpu.cmake')
| -rw-r--r-- | src/cmake/cpu.cmake | 64 |
1 files changed, 27 insertions, 37 deletions
diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake index f4a57a34281..dbe0f17b94f 100644 --- a/src/cmake/cpu.cmake +++ b/src/cmake/cpu.cmake @@ -11,49 +11,31 @@ # See the License for the specific language governing permissions and # limitations under the License. +macro(set_log2_cacheline_size var n) + if(${n} EQUAL 128) + set(${var} 7) + elseif(${n} EQUAL 64) + set(${var} 6) + else() + message(FATAL_ERROR "Cacheline size ${n} not supported") + endif() +endmacro() + ############################################################################## -# Cache line size detection +# Cache line size ############################################################################## -if(CMAKE_CROSSCOMPILING) - message(STATUS "Cross-compiling - cache line size detection disabled") - set(VPP_LOG2_CACHE_LINE_SIZE 6) -elseif(DEFINED VPP_LOG2_CACHE_LINE_SIZE) +if(DEFINED VPP_CACHE_LINE_SIZE) # Cache line size assigned via cmake args elseif(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 ${value}) - endif() - endforeach() - # Implementer 0x43 - Cavium - # Part 0x0af - ThunderX2 is 64B, rest all are 128B - if (${CPU_IMPLEMENTER} STREQUAL "0x43") - if (${CPU_PART} STREQUAL "0x0af") - set(VPP_LOG2_CACHE_LINE_SIZE 6) - else() - set(VPP_LOG2_CACHE_LINE_SIZE 7) - endif() - 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}") + set(VPP_CACHE_LINE_SIZE 128) else() - set(VPP_LOG2_CACHE_LINE_SIZE 6) + set(VPP_CACHE_LINE_SIZE 64) endif() -set(VPP_LOG2_CACHE_LINE_SIZE ${VPP_LOG2_CACHE_LINE_SIZE} - CACHE STRING "Target CPU cache line size (power of 2)") +set(VPP_CACHE_LINE_SIZE ${VPP_CACHE_LINE_SIZE} + CACHE STRING "Target CPU cache line size") + +set_log2_cacheline_size(VPP_LOG2_CACHE_LINE_SIZE ${VPP_CACHE_LINE_SIZE}) ############################################################################## # Gnu Assembler AVX-512 bug detection @@ -77,7 +59,7 @@ endif() macro(add_vpp_march_variant v) cmake_parse_arguments(ARG "OFF" - "N_PREFETCHES" + "N_PREFETCHES;CACHE_PREFETCH_BYTES" "FLAGS" ${ARGN} ) @@ -98,6 +80,10 @@ macro(add_vpp_march_variant v) if(ARG_N_PREFETCHES) string(APPEND fs " -DCLIB_N_PREFETCHES=${ARG_N_PREFETCHES}") endif() + if(ARG_CACHE_PREFETCH_BYTES) + set_log2_cacheline_size(log2 ${ARG_CACHE_PREFETCH_BYTES}) + string(APPEND fs " -DCLIB_LOG2_CACHE_PREFETCH_BYTES=${log2}") + endif() if(flags_ok) string(TOUPPER ${v} uv) if(ARG_OFF) @@ -143,6 +129,7 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)") add_vpp_march_variant(qdf24xx FLAGS -march=armv8-a+crc+crypto -mtune=qdf24xx N_PREFETCHES 8 + CACHE_PREFETCH_BYTES 64 OFF ) @@ -154,16 +141,19 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)") add_vpp_march_variant(thunderx2t99 FLAGS -march=armv8.1-a+crc+crypto -mtune=thunderx2t99 N_PREFETCHES 8 + CACHE_PREFETCH_BYTES 64 ) add_vpp_march_variant(cortexa72 FLAGS -march=armv8-a+crc+crypto -mtune=cortex-a72 N_PREFETCHES 6 + CACHE_PREFETCH_BYTES 64 ) add_vpp_march_variant(neoversen1 FLAGS -march=armv8.2-a+crc+crypto -mtune=neoverse-n1 N_PREFETCHES 6 + CACHE_PREFETCH_BYTES 64 ) endif() |