1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/x86/tst-sysconf-cache-linesize.c b/sysdeps/x86/tst-sysconf-cache-linesize.c
new file mode 100644
index 0000000..642dbde
--- /dev/null
+++ b/sysdeps/x86/tst-sysconf-cache-linesize.c
@@ -0,0 +1,57 @@
+/* Test system cache line sizes.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <array_length.h>
+
+static struct
+{
+  const char *name;
+  int _SC_val;
+} sc_options[] =
+  {
+#define N(name) { "_SC_"#name, _SC_##name }
+    N (LEVEL1_ICACHE_LINESIZE),
+    N (LEVEL1_DCACHE_LINESIZE),
+    N (LEVEL2_CACHE_LINESIZE)
+  };
+
+static int
+do_test (void)
+{
+  int result = EXIT_SUCCESS;
+
+  for (int i = 0; i < array_length (sc_options); ++i)
+    {
+      long int scret = sysconf (sc_options[i]._SC_val);
+      if (scret < 0)
+	{
+	  printf ("sysconf (%s) returned < 0 (%ld)\n",
+		  sc_options[i].name, scret);
+	  result = EXIT_FAILURE;
+	}
+      else
+	printf ("sysconf (%s): %ld\n", sc_options[i].name, scret);
+    }
+
+  return result;
+}
+
+#include <support/test-driver.c>