add test

git-svn-id: http://ltt.polymtl.ca/svn@2249 04897980-b3bd-0310-b5e0-8ef037075253

diff --git a/tests/kernel/test-irqloop.c b/tests/kernel/test-irqloop.c
new file mode 100644 (file)
index 0000000..38a6680
--- /dev/null
+++ b/tests/kernel/test-irqloop.c
@@ -0,0 +1,55 @@
+/* test-irqloop
+ *
+ * Test time spent for irq disabling
+ */
+
+
+#include <linux/config.h>
+#include <linux/jiffies.h>
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#define NR_LOOPS 20000
+
+static int ltt_test_init(void)
+{
+       unsigned int i;
+       cycles_t time1, time2, time;
+       cycles_t max_time = 0, min_time = 18446744073709551615ULL; /* (2^64)-1 */
+       cycles_t tot_time = 0;
+       unsigned long flags;
+       printk(KERN_ALERT "test init\n");
+       
+       time1 = get_cycles();
+       for(i=0; i<NR_LOOPS; i++) {
+               local_irq_save(flags);
+               local_irq_restore(flags);
+       }
+       time2 = get_cycles();
+       time = time2 - time1;
+       tot_time += time;
+
+       printk(KERN_ALERT "test results : time for irq save/restore\n");
+       printk(KERN_ALERT "number of loops : %d\n", NR_LOOPS);
+       printk(KERN_ALERT "total time : %llu\n", tot_time);
+       //printk(KERN_ALERT "min : %llu\n", min_time);
+       //printk(KERN_ALERT "max : %llu\n", max_time);
+
+       printk(KERN_ALERT "test end\n");
+       
+       return -EAGAIN; /* Fail will directly unload the module */
+}
+
+static void ltt_test_exit(void)
+{
+       printk(KERN_ALERT "test exit\n");
+}
+
+module_init(ltt_test_init)
+module_exit(ltt_test_exit)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Linux Trace Toolkit Test");
+