COMPMID-1626: Fixed VGG 16/19 bad_alloc failure.

Some systems don't have enough memory to run the VGG networks, for example
on systems with only 2GB memory the VGG example fails throwing a bad_alloc exception.

This patch introduces the concept of global memory policy in ACL, the policy
is a mechanism which could be used by the library's functions to try to reduce
memory consumption on systems with limited memory.

In this specific case the VGG examples set the policy to MINIMIZE. The GEMM
function checks if the policy is MINIMIZE and in this case does not use the
pretransposed weights path as this requires considerable more memory.

Change-Id: I53abc3c9c64d045d8306793ffc9d24b28e228b7b

1 files changed, 8 insertions, 1 deletions

diff --git a/src/runtime/NEON/functions/NEGEMM.cpp b/src/runtime/NEON/functions/NEGEMM.cpp
index e8bf6732b2..82b9cb80ae 100644
--- a/src/runtime/NEON/functions/NEGEMM.cpp
+++ b/src/runtime/NEON/functions/NEGEMM.cpp
@@ -62,7 +62,14 @@ void NEGEMM::configure(const ITensor *a, const ITensor *b, const ITensor *c, ITe
 
     if(run_optimised)
     {
-        _asm_glue.configure(a, b, d, alpha, beta, _reshape_b_only_on_first_run);
+        if(MEMInfo::get_policy() == MemoryPolicy::MINIMIZE)
+        {
+            _asm_glue.configure(a, b, d, alpha, beta, false);
+        }
+        else
+        {
+            _asm_glue.configure(a, b, d, alpha, beta, _reshape_b_only_on_first_run);
+        }
         ARM_COMPUTE_ERROR_ON(!_asm_glue.is_configured());
     }
     else