Adding an environmental variable to control the cuda host memory limit.

Change: 135978018

1 files changed, 63 insertions, 0 deletions

diff --git a/tensorflow/core/util/env_var.cc b/tensorflow/core/util/env_var.cc
new file mode 100644
index 0000000000..d4e89b966e
--- /dev/null
+++ b/tensorflow/core/util/env_var.cc
@@ -0,0 +1,63 @@
+/* Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include "tensorflow/core/util/env_var.h"
+
+#include <stdlib.h>
+
+#include "tensorflow/core/lib/core/errors.h"
+#include "tensorflow/core/lib/strings/numbers.h"
+#include "tensorflow/core/lib/strings/str_util.h"
+#include "tensorflow/core/lib/strings/strcat.h"
+#include "tensorflow/core/platform/logging.h"
+
+namespace tensorflow {
+
+Status ReadBoolFromEnvVar(StringPiece env_var_name, bool default_val,
+                          bool* value) {
+  *value = default_val;
+  const char* tf_env_var_val = getenv(env_var_name.ToString().c_str());
+  if (tf_env_var_val == nullptr) {
+    return Status::OK();
+  }
+  string str_value = str_util::Lowercase(tf_env_var_val);
+  if (str_value == "0" || str_value == "false") {
+    *value = false;
+    return Status::OK();
+  } else if (str_value == "1" || str_value == "true") {
+    *value = true;
+    return Status::OK();
+  }
+  return errors::InvalidArgument(strings::StrCat(
+      "Failed to parse the env-var ${", env_var_name, "} into bool: ",
+      tf_env_var_val, ". Use the default value: ", default_val));
+}
+
+Status ReadInt64FromEnvVar(StringPiece env_var_name, int64 default_val,
+                           int64* value) {
+  *value = default_val;
+  const char* tf_env_var_val = getenv(env_var_name.ToString().c_str());
+  if (tf_env_var_val == nullptr) {
+    return Status::OK();
+  }
+  if (strings::safe_strto64(tf_env_var_val, value)) {
+    return Status::OK();
+  }
+  return errors::InvalidArgument(strings::StrCat(
+      "Failed to parse the env-var ${", env_var_name, "} into int64: ",
+      tf_env_var_val, ". Use the default value: ", default_val));
+}
+
+}  // namespace tensorflow