From 73bb6b7ad80801e56633ad4ea12b0404b586a979 Mon Sep 17 00:00:00 2001
From: Fadi Arafeh <fadi.arafeh@arm.com>
Date: Thu, 6 Oct 2022 16:20:14 +0000
Subject: ONCPUML-1072: Tuned MWS values (for N1, V1) for binary operators used
 by oneDNN

Added approximate values for MWS for the following binary operators:
Add, Sub, Mul, Min, Max, Div

Change-Id: I5c4c75511129982a3f44c038ee272f09598469de
Signed-off-by: Fadi Arafeh <fadi.arafeh@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/459609
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Comments-Addressed: bsgcomp <bsgcomp@arm.com>
Signed-off-by: fadara01 <fadi.arafeh@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/8392
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
---
 src/cpu/kernels/CpuSubKernel.cpp | 46 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'src/cpu/kernels/CpuSubKernel.cpp')

diff --git a/src/cpu/kernels/CpuSubKernel.cpp b/src/cpu/kernels/CpuSubKernel.cpp
index d908e4ed28..ad74dda85d 100644
--- a/src/cpu/kernels/CpuSubKernel.cpp
+++ b/src/cpu/kernels/CpuSubKernel.cpp
@@ -31,6 +31,11 @@
 #include "src/core/helpers/WindowHelpers.h"
 #include "src/cpu/kernels/sub/neon/list.h"
 
+namespace
+{
+    static constexpr size_t default_mws_N1_fp32_neon = 24385;
+    static constexpr size_t default_mws_V1_fp32_neon = 40520;
+}
 namespace arm_compute
 {
 namespace cpu
@@ -137,6 +142,47 @@ void CpuSubKernel::configure(const ITensorInfo *src0, const ITensorInfo *src1, I
     ICpuKernel::configure(win);
 }
 
+size_t CpuSubKernel::get_mws(const CPUInfo &platform, size_t thread_count) const
+{
+    ARM_COMPUTE_UNUSED(thread_count);
+
+#if defined(ENABLE_FP32_KERNELS)
+    if(this->_run_method == &sub_same_neon<float>)
+    {
+        size_t mws = ICPPKernel::default_mws;
+        if(platform.get_cpu_model() == CPUModel::N1)
+        {
+            mws = default_mws_N1_fp32_neon;
+        }
+        else if(platform.get_cpu_model() == CPUModel::V1)
+        {
+            mws = default_mws_V1_fp32_neon;
+        }
+        else
+        {
+            return ICPPKernel::default_mws;
+        }
+
+        // tensor is 1D or was re-interpreted as 1D
+        if(this->window().shape().num_dimensions() == 1)
+        {
+            return mws;
+        }
+        else
+        {
+            // scale mws down by the number of elements along all the dimensions (x, z, w, etc) except the one
+            // that we parallelize along (the y dimension). This allows for parallelization when the Y_SIZE is small
+            // but the other sizes are large, which boosts performance.
+            mws = static_cast<size_t>(mws / (this->window().num_iterations_total() / this->window().num_iterations(1)));
+            return std::max(static_cast<size_t>(1), mws);
+        }
+    }
+#else /* ENABLE_FP32_KERNELS */
+    ARM_COMPUTE_UNUSED(platform);
+#endif /* ENABLE_FP32_KERNELS */
+    return ICPPKernel::default_mws;
+}
+
 Status CpuSubKernel::validate(const ITensorInfo *src0, const ITensorInfo *src1, const ITensorInfo *dst, ConvertPolicy policy)
 {
     ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src0, src1, dst);
-- 
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