ggml : optimize llamafile cpu matrix multiplication for ppc64le (#10156)

This change upstreams llamafile's cpu matrix multiplication kernels for ppc64le using MMA builtins for FP32 datatype. This change results in a consistent 90% improvement in input processing time, and 20% to 80% improvement in output processing time, across various batch sizes. The patch is tested with Meta-Lllama-3-8B, Mistral-7B, Llama-2-7B-chat-hf models on a IBM POWER10 machine. Signed-off-by: Amrita H S <[email protected]>
ggerganov · Nov 9, 2024 · e892134 · e892134
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commit e892134
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diff --git a/ggml/src/CMakeLists.txt b/ggml/src/CMakeLists.txt
@@ -1265,8 +1265,13 @@ elseif (CMAKE_OSX_ARCHITECTURES STREQUAL "x86_64" OR CMAKE_GENERATOR_PLATFORM_LW
     endif()
 elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "ppc64")
     message(STATUS "PowerPC detected")
-    if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "ppc64le")
-        list(APPEND ARCH_FLAGS -mcpu=powerpc64le)
+    execute_process(COMMAND bash -c "grep POWER10 /proc/cpuinfo | head -n 1"
+                   OUTPUT_VARIABLE POWER10_M)
+    string(FIND ${POWER10_M} "POWER10" substring_index)
+    if(${substring_index} GREATER_EQUAL 0)
+       list(APPEND ARCH_FLAGS -mcpu=power10)
+    elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "ppc64le")
+       list(APPEND ARCH_FLAGS -mcpu=powerpc64le)
     else()
         list(APPEND ARCH_FLAGS -mcpu=native -mtune=native)
         #TODO: Add  targets for Power8/Power9 (Altivec/VSX) and Power10(MMA) and query for big endian systems (ppc64/le/be)