COMPMID-765 - Used GEMM-based convolution in VGG16

In order to use GEMM-based convolution in VGG16, it has been created a
function which allocates 1.8 GB. If the function fails, will be used
DIRECT convolution instead

Change-Id: Ibec8928ee6fe6684d6dc24b7df380beeb671bf27
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/119490
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

2 files changed, 40 insertions, 2 deletions

diff --git a/utils/Utils.cpp b/utils/Utils.cpp
index 32d5e3a6c0..8a2d11814e 100644
--- a/utils/Utils.cpp
+++ b/utils/Utils.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2018 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -191,5 +191,39 @@ std::tuple<std::vector<unsigned long>, bool, std::string> parse_npy_header(std::
 
     return std::make_tuple(shape, fortran_order, typestr);
 }
+
+/** This function returns the amount of memory free reading from /proc/meminfo
+ *
+ * @return The free memory in kB
+ */
+uint64_t get_mem_free_from_meminfo()
+{
+    std::string   line_attribute;
+    std::ifstream file_meminfo("/proc/meminfo");
+
+    if(file_meminfo.is_open())
+    {
+        while(!(file_meminfo >> line_attribute).fail())
+        {
+            //Test if is the line containing MemFree
+            if(line_attribute == "MemFree:")
+            {
+                uint64_t mem_available;
+                if(!(file_meminfo >> mem_available).fail())
+                {
+                    return mem_available;
+                }
+                else
+                {
+                    return 0;
+                }
+            }
+            // if it's not MemFree ignore rest of the line
+            file_meminfo.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+        }
+    }
+    // Nothing found or an error during opening the file
+    return 0;
+}
 } // namespace utils
 } // namespace arm_compute
diff --git a/utils/Utils.h b/utils/Utils.h
index ff4c4c99fd..8822fe7121 100644
--- a/utils/Utils.h
+++ b/utils/Utils.h
@@ -895,7 +895,11 @@ void init_sgemm_output(T &dst, T &src0, T &src1, arm_compute::DataType dt)
 {
     dst.allocator()->init(TensorInfo(TensorShape(src1.info()->dimension(0), src0.info()->dimension(1)), 1, dt));
 }
-
+/** This function returns the amount of memory free reading from /proc/meminfo
+ *
+ * @return The free memory in kB
+ */
+uint64_t get_mem_free_from_meminfo();
 } // namespace utils
 } // namespace arm_compute
 #endif /* __UTILS_UTILS_H__*/