diff options
Diffstat (limited to 'pthreads/tests/affinity3.c')
| -rwxr-xr-x | pthreads/tests/affinity3.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/pthreads/tests/affinity3.c b/pthreads/tests/affinity3.c new file mode 100755 index 000000000..065dd21a4 --- /dev/null +++ b/pthreads/tests/affinity3.c @@ -0,0 +1,100 @@ +/*
+ * affinity3.c
+ *
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2012 Pthreads-win32 contributors
+ *
+ * Homepage1: http://sourceware.org/pthreads-win32/
+ * Homepage2: http://sourceforge.net/projects/pthreads4w/
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This 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 of the License, or (at your option) any later version.
+ *
+ * This 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 this library in the file COPYING.LIB;
+ * if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Have the thread switch CPUs.
+ *
+ */
+
+#include "test.h"
+
+int
+main()
+{
+ int result;
+ unsigned int cpu;
+ cpu_set_t newmask;
+ cpu_set_t processCpus;
+ cpu_set_t mask;
+ cpu_set_t switchmask;
+ cpu_set_t flipmask;
+ pthread_t self = pthread_self();
+
+ CPU_ZERO(&mask);
+ CPU_ZERO(&switchmask);
+ CPU_ZERO(&flipmask);
+
+ assert(pthread_getaffinity_np(self, sizeof(cpu_set_t), &processCpus) == 0);
+ printf("This thread has a starting affinity with %d CPUs\n", CPU_COUNT(&processCpus));
+ assert(!CPU_EQUAL(&mask, &processCpus));
+
+ for (cpu = 0; cpu < sizeof(cpu_set_t)*8; cpu += 2)
+ {
+ CPU_SET(cpu, &switchmask); /* 0b01010101010101010101010101010101 */
+ }
+ for (cpu = 0; cpu < sizeof(cpu_set_t)*8; cpu++)
+ {
+ CPU_SET(cpu, &flipmask); /* 0b11111111111111111111111111111111 */
+ }
+
+ result = pthread_setaffinity_np(self, sizeof(cpu_set_t), &processCpus);
+ if (result != 0)
+ {
+ assert(result != ESRCH);
+ assert(result != EFAULT);
+ assert(result != EPERM);
+ assert(result != EINVAL);
+ assert(result != EAGAIN);
+ assert(result == ENOSYS);
+ assert(CPU_COUNT(&mask) == 1);
+ }
+ else
+ {
+ if (CPU_COUNT(&mask) > 1)
+ {
+ CPU_AND(&newmask, &processCpus, &switchmask); /* Remove every other CPU */
+ assert(pthread_setaffinity_np(self, sizeof(cpu_set_t), &newmask) == 0);
+ assert(pthread_getaffinity_np(self, sizeof(cpu_set_t), &mask) == 0);
+ assert(CPU_EQUAL(&mask, &newmask));
+ CPU_XOR(&newmask, &mask, &flipmask); /* Switch to all alternative CPUs */
+ assert(!CPU_EQUAL(&mask, &newmask));
+ assert(pthread_setaffinity_np(self, sizeof(cpu_set_t), &newmask) == 0);
+ assert(pthread_getaffinity_np(self, sizeof(cpu_set_t), &mask) == 0);
+ assert(CPU_EQUAL(&mask, &newmask));
+ }
+ }
+
+ return 0;
+}
|