Finish context switch benchmark test. Still need to disable NMIs and...

Finish context switch benchmark test. Still need to disable NMIs and preemption to decrease variance in results.

configure.ac

@@ -114,6 +114,7 @@ AC_CONFIG_FILES(
   src/tests/simple/Kbuild
 
   src/tests/dispatch/Kbuild
+  src/tests/ctx-switch/Kbuild
 )
 AC_OUTPUT
 

src/tests/Kbuild.in

 
 obj-m += simple/
 obj-m += dispatch/
+obj-m += ctx-switch/

src/tests/Makefile.am

@@ -3,3 +3,4 @@
 install-tests:
 	cp $(LIBASYNC_TESTS_KBUILD)/simple/libasync_test_simple.ko $(D)
 	cp $(LIBASYNC_TESTS_KBUILD)/dispatch/libfipc_test_dispatch_loop.ko $(D)
+	cp $(LIBASYNC_TESTS_KBUILD)/ctx-switch/ctx_switch_test.ko $(D)

src/tests/ctx-switch/Kbuild.in

+
+# @ASYNC_AUTOCONF_NOTICE@
+
+# Magic line so we can do out-of-source build
+src = @abs_top_srcdir@/src/tests/ctx-switch
+
+obj-m = ctx_switch_test.o
+
+# Paths are relative to ctx-switch/ build dir
+ctx_switch_test-y += ../test_helpers.o main.o
+
+# src/Makefile.am.
+ctx_switch_test-y += ../../$(LIBASYNC_PATH) 
+ctx_switch_test-y += ../../$(LIBFIPC_LIB) 
+
+ccflags-y += $(CFLAGS) $(AM_CPPFLAGS) $(AM_CFLAGS)

src/tests/ctx-switch/main.c

@@ -9,13 +9,16 @@
  */
 
 #include <libfipc.h>
+#include <thc.h>
+#include <thcinternal.h>
+#include <awe_mapper.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include "../test_helpers.h"
 
 MODULE_LICENSE("GPL");
 
-#define NUM_SWITCH_MEASUREMENTS 1000
+#define NUM_SWITCH_MEASUREMENTS 100000
 
 static unsigned long ctx_switch_measurements[NUM_SWITCH_MEASUREMENTS];
 
@@ -26,8 +29,8 @@ static int setup_and_run_test(void)
     uint32_t msg_id;
 
     thc_init();
-    
-    for( int i = 0; i < NUM_SWITCH_MEASUREMENTS; i++ )
+    int i;    
+    for( i = 0; i < NUM_SWITCH_MEASUREMENTS; i++ )
     {
         DO_FINISH_(ctx_switch,{
             ASYNC({

src/tests/test_helpers.c

@@ -15,4 +15,27 @@ static int test_fipc_compare(const void *_a, const void *_b){
 }
 
 
+void test_fipc_dump_time(unsigned long *time, unsigned long num_transactions)
+{
+
+	int i;
+	unsigned long long counter = 0;
+    unsigned long min;
+	unsigned long max;
+
+	for (i = 0; i < num_transactions; i++) {
+		counter+= time[i];
+	}
+
+	sort(time, num_transactions, sizeof(unsigned long), test_fipc_compare, NULL);
+
+	min = time[0];
+	max = time[num_transactions-1];
+	//counter = min;
+
+	printk(KERN_ERR "MIN\tMAX\tAVG\tMEDIAN\n");
+	printk(KERN_ERR "%lu & %lu & %llu & %lu \n", min, max, counter/num_transactions, time[num_transactions/2]);
+}
+EXPORT_SYMBOL(test_fipc_dump_time);
+
 

src/tests/test_helpers.h

@@ -262,31 +262,7 @@ static inline unsigned long test_fipc_stop_stopwatch(void)
 }
 
 
-static int test_fipc_compare(const void *_a, const void *_b);
-
-
-static inline void test_fipc_dump_time(unsigned long *time, unsigned long num_transactions)
-{
-
-	int i;
-	unsigned long long counter = 0;
-    unsigned long min;
-	unsigned long max;
-
-	for (i = 0; i < num_transactions; i++) {
-		counter+= time[i];
-	}
-
-	sort(time, num_transactions, sizeof(unsigned long), test_fipc_compare, NULL);
-
-	min = time[0];
-	max = time[num_transactions-1];
-	counter = min;
-
-	printk(KERN_ERR "MIN\tMAX\tAVG\tMEDIAN\n");
-	printk(KERN_ERR "%lu & %lu & %llu & %lu \n", min, max, counter/num_transactions, time[num_transactions/2]);
-
-}
+void test_fipc_dump_time(unsigned long *time, unsigned long num_transactions);
 
 
 #endif /* FIPC_KERNEL_TEST_HELPERS_H */