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diff --git a/test/cpp/qps/limit_cores.cc b/test/cpp/qps/limit_cores.cc
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+++ b/test/cpp/qps/limit_cores.cc
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+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/qps/limit_cores.h"
+
+#include <grpc/support/cpu.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <vector>
+
+namespace grpc {
+namespace testing {
+
+#ifdef GPR_CPU_LINUX
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <sched.h>
+int LimitCores(const int *cores, int cores_size) {
+  const int num_cores = gpr_cpu_num_cores();
+  int cores_set = 0;
+
+  cpu_set_t *cpup = CPU_ALLOC(num_cores);
+  GPR_ASSERT(cpup);
+  const size_t size = CPU_ALLOC_SIZE(num_cores);
+  CPU_ZERO_S(size, cpup);
+
+  if (cores_size > 0) {
+    for (int i = 0; i < cores_size; i++) {
+      if (cores[i] < num_cores) {
+        CPU_SET_S(cores[i], size, cpup);
+        cores_set++;
+      }
+    }
+  } else {
+    for (int i = 0; i < num_cores; i++) {
+      CPU_SET_S(i, size, cpup);
+      cores_set++;
+    }
+  }
+  GPR_ASSERT(sched_setaffinity(0, size, cpup) == 0);
+  CPU_FREE(cpup);
+  return cores_set;
+}
+#else
+// LimitCores is not currently supported for non-Linux platforms
+int LimitCores(std::vector<int> core_vec) { return gpr_cpu_num_cores(); }
+#endif
+}  // namespace testing
+}  // namespace grpc