Merge commit 'refs/top-bases/t/bits_atomic.h_multiple_threads' into t/bits_atomic.h_multiple_threadst/bits_atomic.h_multiple_threads

1 files changed, 58 insertions, 0 deletions

diff --git a/benchtests/thread_create-source.c b/benchtests/thread_create-source.c
new file mode 100644
index 0000000000..2e32c84b3a
--- /dev/null
+++ b/benchtests/thread_create-source.c
@@ -0,0 +1,58 @@
+/* Measure pthread_create thread creation with different stack
+   and guard sizes.
+
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <support/xthread.h>
+
+static size_t pgsize;
+
+static void
+thread_create_init (void)
+{
+  pgsize = sysconf (_SC_PAGESIZE);
+}
+
+static void *
+thread_dummy (void *arg)
+{
+  return NULL;
+}
+
+static void
+thread_create (int nthreads, size_t stacksize, size_t guardsize)
+{
+  pthread_attr_t attr;
+  xpthread_attr_init (&attr);
+
+  stacksize = stacksize * pgsize;
+  guardsize = guardsize * pgsize;
+
+  xpthread_attr_setstacksize (&attr, stacksize);
+  xpthread_attr_setguardsize (&attr, guardsize);
+
+  pthread_t ts[nthreads];
+
+  for (int i = 0; i < nthreads; i++)
+    ts[i] = xpthread_create (&attr, thread_dummy, NULL);
+
+  for (int i = 0; i < nthreads; i++)
+    xpthread_join (ts[i]);
+}