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diff --git a/src/ceph/src/test/perf_helper.cc b/src/ceph/src/test/perf_helper.cc
new file mode 100644
index 0000000..7661cb5
--- /dev/null
+++ b/src/ceph/src/test/perf_helper.cc
@@ -0,0 +1,51 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/* Copyright (c) 2011 Facebook
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR(S) DISCLAIM ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL AUTHORS BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "include/buffer.h"
+
+using namespace ceph;
+
+namespace PerfHelper {
+
+/// Flush the CPU data cache by reading and writing 100MB of new data.
+void flush_cache()
+{
+    int hundredMegs = 100 * 1024 * 1024;
+    volatile char* block = new char[hundredMegs];
+    for (int i = 0; i < hundredMegs; i++)
+        block[i] = 1;
+    delete[] block;
+}
+
+/// Used in functionCall().
+uint64_t plus_one(uint64_t x)
+{
+    return x + 1;
+}
+
+/// Used in throwIntNL.
+void throw_int()
+{
+    throw 0;
+}
+
+/// Used in throwExceptionNL.
+void throw_end_of_buffer()
+{
+    throw buffer::end_of_buffer();
+}
+}