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authorDamjan Marion <damarion@cisco.com>2021-07-14 18:18:08 +0200
committerFlorin Coras <florin.coras@gmail.com>2021-07-27 23:40:28 +0000
commit24d65a1c5aa18c107ae17115dfb2ea1e5cc05527 (patch)
tree215cbb2717554776aef83228b66874e1d15a8120 /src/cmake/cpu.cmake
parent37579c3bcd5f7c31bee4d16d97cfc71dea07fb76 (diff)
vppinfra: introduce CLIB_CACHE_PREFETCH_BYTES
Type: improvement Change-Id: Ic07010f11ef303f5213a33b0faf24aaedb62f110 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/cmake/cpu.cmake')
-rw-r--r--src/cmake/cpu.cmake64
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()