COMPMID-3329: failures in nightly (GC/GEMM and CPP/DFT)

- Can't recreate GC/GEMM
- Fix on CPP/DFT/DFT2D/Complex using the appropriate tolerance
- Fix CPP/DFT/Conv/Real2Real by removing concurrency issue on faulty function

Looking at the proper fix for CPP/DFT/Conv/Real2Real since it is a concurrency issue

Change-Id: Ic846dc7925d4c1b47e14181656c905f90778cdeb
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3085
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>

2 files changed, 3 insertions, 5 deletions

diff --git a/tests/validation/CPP/DFT.cpp b/tests/validation/CPP/DFT.cpp
index 8f1b82371d..d4020f2d99 100644
--- a/tests/validation/CPP/DFT.cpp
+++ b/tests/validation/CPP/DFT.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 ARM Limited.
+ * Copyright (c) 2019-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -141,7 +141,7 @@ DATA_TEST_CASE(Complex, framework::DatasetMode::ALL, shapes_2d_dft,
     auto backward = reference::dft_2d(forward, reference::FFTDirection::Inverse);
 
     // Validate with input
-    validate(SimpleTensorAccessor<float>(src), backward, RelativeTolerance<float>(0.1f));
+    validate(SimpleTensorAccessor<float>(src), backward, RelativeTolerance<float>(0.1f), 0.f, AbsoluteTolerance<float>(0.001f));
 }
 TEST_SUITE_END() // DFT2D
 
diff --git a/tests/validation/reference/DFT.cpp b/tests/validation/reference/DFT.cpp
index ae030c7104..7221312641 100644
--- a/tests/validation/reference/DFT.cpp
+++ b/tests/validation/reference/DFT.cpp
@@ -269,9 +269,7 @@ SimpleTensor<T> complex_mul_and_reduce(const SimpleTensor<T> &input, const Simpl
 
     // MemSet dst memory to zero
     std::memset(dst.data(), 0, dst.size());
-#if defined(_OPENMP)
-    #pragma omp parallel for collapse(5)
-#endif /* _OPENMP */
+
     for(uint32_t b = 0; b < N; ++b)
     {
         for(uint32_t co = 0; co < Co; ++co)