Add hw_sw_mix test

CHANGES

@@ -1,4 +1,7 @@
-29 January 2012
+13 March 2013
++ Add hw_sw_mix test
+
+29 January 2013
 + Add sw_start_leader test
 
 27 November 2012

corner_cases/Makefile

@@ -5,6 +5,7 @@ LFLAGS =
 all:	\
 	check_reset_mpx \
 	context_switch_user_kernel \
+	hw_sw_mix \
 	ioctl_refresh_0 \
 	max_multiplex \
 	multiple_active \
@@ -139,6 +140,21 @@ signal_after_exec.o:	signal_after_exec.c
 
 ###
 
+hw_sw_mix:	hw_sw_mix.o \
+				../lib/perf_helpers.o \
+				../lib/test_utils.o \
+				../lib/instructions_testcode.o
+	$(CC) $(LFLAGS) -o hw_sw_mix hw_sw_mix.o \
+				../lib/perf_helpers.o \
+				../lib/test_utils.o \
+				../lib/instructions_testcode.o
+
+hw_sw_mix.o:	hw_sw_mix.c
+	$(CC) $(CFLAGS) -c hw_sw_mix.c
+
+
+###
+
 sw_start_leader:	sw_start_leader.o \
 				../lib/perf_helpers.o \
 				../lib/test_utils.o \
@@ -189,6 +205,7 @@ clean:
 	rm -f *~ *.o \
 	check_reset_mpx \
 	context_switch_user_kernel \
+	hw_sw_mix \
 	ioctl_refresh_0 \
 	max_multiplex \
 	multiple_active \

corner_cases/hw_sw_mix.c

@@ -0,0 +1,124 @@
+/* hw_sw_mix.c  */
+/* by Vince Weaver   vincent.weaver _at_ maine.edu */
+
+/* Tests if mixes of hardware and software events work    */
+/* especially for the problem case where the group leader */
+/* is not a hardware event.                               */
+
+/* Based on a test by Jiri Olsa */
+
+#define _GNU_SOURCE 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <sys/ioctl.h>
+
+
+#include "perf_event.h"
+#include "test_utils.h"
+#include "perf_helpers.h"
+#include "instructions_testcode.h"
+
+
+#define EVENTS 4
+
+#define READ_SIZE (EVENTS + 1)
+
+int main(int argc, char** argv) {
+
+   int fd[EVENTS],ret,quiet;
+   int result;
+   int read_result;
+   long long count[READ_SIZE];
+   int i,e;
+
+   struct perf_event_attr pe[EVENTS];
+
+   char test_string[]="Testing mixes of HW an SW events...";
+
+   quiet=test_quiet();
+
+   if (!quiet) {
+      printf("Testing mixes of HW and SW events if group leader is SW.\n");
+      printf("This is known to be broken through 3.9\n");
+   }
+
+   if (!quiet) printf("Testing with: ");
+   for(e=0;e<(1<<EVENTS);e++) {
+
+      for(i=0;i<EVENTS;i++) {
+         memset(&pe[i],0,sizeof(struct perf_event_attr));
+         pe[i].size=sizeof(struct perf_event_attr);
+
+         if (e&(1<<i)) {
+            pe[i].type=PERF_TYPE_HARDWARE;
+            pe[i].config=PERF_COUNT_HW_CPU_CYCLES;
+            if (!quiet) printf("H");
+         }
+         else {
+            pe[i].type=PERF_TYPE_SOFTWARE;
+            pe[i].config=PERF_COUNT_SW_TASK_CLOCK;
+            if (!quiet) printf("S");
+         }
+
+         if (i==0) {
+            pe[i].disabled=1;
+         }
+
+         pe[i].exclude_kernel=1;
+         pe[i].read_format=PERF_FORMAT_GROUP;
+
+         fd[i]=perf_event_open(&pe[i],0,-1,i==0?-1:fd[0],0);
+         if (fd[0]<0) {
+            fprintf(stderr,"Error opening\n");
+            test_fail(test_string);
+            exit(1);
+         }
+      }
+      if (!quiet) printf("\n");
+
+      ioctl(fd[0], PERF_EVENT_IOC_RESET, 0);
+      ioctl(fd[0], PERF_EVENT_IOC_ENABLE,0);
+
+      result=instructions_million();
+      if (result==CODE_UNIMPLEMENTED) printf("Warning, no million\n");
+
+      ioctl(fd[0], PERF_EVENT_IOC_DISABLE,0);
+
+      read_result=read(fd[0],&count,sizeof(long long)*READ_SIZE);
+      if (read_result!=sizeof(long long)*READ_SIZE) {
+         if (!quiet) printf("Unexpected read size\n");
+         test_fail(test_string);
+      }
+
+      if (!quiet) {
+         for(i=0;i<count[0];i++) {
+	    printf("\t%i Counted %lld\n",i,count[1+i]);
+         }
+      }
+
+      for(i=0;i<EVENTS;i++) {
+         if (count[i]==0) {
+            if (!quiet) {
+               fprintf(stderr,"Counter %d did not start as expected\n",i);
+            }
+            test_fail(test_string);
+         }
+      }
+
+      for(i=0;i<EVENTS;i++) {
+         close(fd[i]);
+      }
+   }
+
+   (void) ret;
+
+   test_pass(test_string);
+
+   return 0;
+}

run_tests.sh

@@ -63,6 +63,7 @@ echo "* Checking bugs that PAPI has to work around"
 echo
 echo "* Checking other bugs"
 ./corner_cases/sw_start_leader
+./corner_cases/hw_sw_mix
 
 echo
 echo "* Checking bugs that can silently produce wrong results"