From 2886c757389c0ccca20a8689daf8180a730ecbc9 Mon Sep 17 00:00:00 2001
From: Gian Marco Iodice <gianmarco.iodice@arm.com>
Date: Thu, 7 May 2020 10:26:15 +0100
Subject: COMPMID-3459: Updated heuristic in CLGEMMReshapedOnlyRHSKernel

Change-Id: Ib958649d0193c148f45d72404da21d3f02dc5183
Signed-off-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3154
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
---
 .../CLGEMMReshapedOnlyRHSKernelConfigurationValhall.cpp  | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/core/CL/gemm/reshaped_only_rhs/CLGEMMReshapedOnlyRHSKernelConfigurationValhall.cpp b/src/core/CL/gemm/reshaped_only_rhs/CLGEMMReshapedOnlyRHSKernelConfigurationValhall.cpp
index d93a912c0d..819a297a2f 100644
--- a/src/core/CL/gemm/reshaped_only_rhs/CLGEMMReshapedOnlyRHSKernelConfigurationValhall.cpp
+++ b/src/core/CL/gemm/reshaped_only_rhs/CLGEMMReshapedOnlyRHSKernelConfigurationValhall.cpp
@@ -135,7 +135,21 @@ std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> CLGEMMReshapedOnlyRHSKernelConfi
     else
     {
         const int h0 = std::max(std::min(static_cast<int>(n / 4), static_cast<int>(256)), static_cast<int>(1));
-        return configure_lhs_rhs_info(m, n, 4, 4, 4, 1, h0, false, true, false, false);
+        if(n >= 64)
+        {
+            return configure_lhs_rhs_info(m, n, 4, 4, 4, 1, h0, false, true, false, false);
+        }
+        else
+        {
+            if(k >= 512)
+            {
+                return configure_lhs_rhs_info(m, n, 2, 4, 16, 1, h0, false, true, false, false);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, h0, false, true, false, false);
+            }
+        }
     }
 }
 
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