From 85530132e169794d9e7e9c1de1396a12bc650383 Mon Sep 17 00:00:00 2001
From: charles <charles>
Date: Fri, 21 Nov 2008 02:19:30 +0000
Subject: [PATCH] Tweaks to nor stress simulation. Save random seed so that we
 can do better debugging

---
 direct/Makefile              |  4 ++--
 direct/dtest.c               |  3 ++-
 direct/nor_stress.c          | 10 +++++++---
 direct/run_fw_update_test.sh |  9 ++++++---
 direct/yaffs_test.c          | 11 +++++++++--
 direct/ynorsim.c             |  3 ++-
 6 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/direct/Makefile b/direct/Makefile
index bfd98be..ff9f2e3 100644
--- a/direct/Makefile
+++ b/direct/Makefile
@@ -14,7 +14,7 @@
 #
 # NB Warning this Makefile does not include header dependencies.
 #
-# $Id: Makefile,v 1.20 2008-11-11 01:48:47 charles Exp $
+# $Id: Makefile,v 1.21 2008-11-21 02:19:30 charles Exp $
 
 #EXTRA_COMPILE_FLAGS = -DYAFFS_IGNORE_TAGS_ECC
 
@@ -22,7 +22,7 @@ CFLAGS =      -DCONFIG_YAFFS_DIRECT -DCONFIG_YAFFS_SHORT_NAMES_IN_RAM -DCONFIG_Y
 CFLAGS +=     -DCONFIG_YAFFS_PROVIDE_DEFS -DCONFIG_YAFFSFS_PROVIDE_VALUES -DNO_Y_INLINE
 CFLAGS +=    -Wall -g $(EXTRA_COMPILE_FLAGS) -Wstrict-aliasing 
 #CFLAGS +=    -fno-strict-aliasing
-CFLAGS +=    -O3
+CFLAGS +=    -O0
 #CFLAGS +=    -DVALGRIND_TEST
 
 #CFLAGS+=   -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations
diff --git a/direct/dtest.c b/direct/dtest.c
index fd4f966..4478cdc 100644
--- a/direct/dtest.c
+++ b/direct/dtest.c
@@ -2283,10 +2283,11 @@ void random_small_file_test(const char *mountpt,int iterations)
 }
 	
 
+int random_seed;
 
 int main(int argc, char *argv[])
 {
-
+	random_seed = time(NULL);
 	//return long_test(argc,argv);
 	
 	//return cache_read_test();
diff --git a/direct/nor_stress.c b/direct/nor_stress.c
index 4ac10b1..b370458 100644
--- a/direct/nor_stress.c
+++ b/direct/nor_stress.c
@@ -290,10 +290,11 @@ static int yVerifyFile(const char *fName)
 	return retval;
 }
 
-static unsigned long next = 1;
+extern int random_seed;
+
 int myrand(void) {
-  next = next * 1103515245 + 12345;
-  return((unsigned)(next/65536) % 32768);
+  random_seed = random_seed * 1103515245 + 12345;
+  return((unsigned)(random_seed/65536) % 32768);
 }
 
 static void DoUpdateMainFile(void)
@@ -344,13 +345,16 @@ void NorStressTestRun(const char *prefix)
   dump_directory_tree(fullPathName);
   
   UpdateCounter(fullPowerUpName,&powerUps,0);
+  dump_directory_tree(fullPathName);
   
   while(1){
     UpdateCounter(fullStartName, &cycleStarts,0);
+    dump_directory_tree(fullPathName);
     DoVerifyMainFile();
     DoUpdateMainFile();
     dump_directory_tree(fullPathName);
   
     UpdateCounter(fullEndName,&cycleEnds,0);
+    dump_directory_tree(fullPathName);
   }
 }
diff --git a/direct/run_fw_update_test.sh b/direct/run_fw_update_test.sh
index b08fa84..8ba1530 100755
--- a/direct/run_fw_update_test.sh
+++ b/direct/run_fw_update_test.sh
@@ -3,10 +3,13 @@
 
 for ((i=0; i < 100000; i++))  
 do
-   echo $i > cycle.count
+
+   seed=$RANDOM   
    j=$(( $i % 10 ))
-   
+   rm seed*$j
+   echo $seed>seed$i
    rm data*$j
    cp ynorsimdata data$i
-   ./yaffs_test /M18-1 fw_update
+   echo "######### Run $i with seed $seed"
+   ./yaffs_test /M18-1 fw_update $seed
 done
diff --git a/direct/yaffs_test.c b/direct/yaffs_test.c
index 381df44..04e3b2a 100644
--- a/direct/yaffs_test.c
+++ b/direct/yaffs_test.c
@@ -26,20 +26,27 @@
 
 
 
+int random_seed;
+
 void BadUsage(void)
 {
-	printf("usage root_dir test_id\n");
+	printf("usage root_dir test_id seed \n");
 	printf(" test_id: fw_update fw_update_init\n");
 	exit(2);
 }
 int main(int argc, const char *argv[])
 {
 	yaffs_StartUp();
-	if(argc == 3) {
+	if(argc == 4) {
+		random_seed = atoi(argv[3]);
+		if(random_seed <= 0)
+			BadUsage();
+			
 		if(!strcmp(argv[2],"fw_update_init")){
 			NorStressTestInitialise(argv[1]);
 		}
 		else if(!strcmp(argv[2],"fw_update")){
+			printf("Running stress on %s with seed %d\n",argv[1],random_seed);
 			NorStressTestRun(argv[1]);
 		}
 		else 
diff --git a/direct/ynorsim.c b/direct/ynorsim.c
index 3281a2f..6936a9c 100644
--- a/direct/ynorsim.c
+++ b/direct/ynorsim.c
@@ -39,6 +39,7 @@
 
 static __u32 word[YNORSIM_DEV_SIZE_U32];
 
+extern int random_seed;
 
 static void NorError(void)
 {
@@ -89,7 +90,7 @@ static void ynorsim_Ready(void)
 {
   if(initialised) 
     return;
-  srand(time(NULL));
+  srand(random_seed);
   remaining_ops = 1000000000;
   remaining_ops = (rand() % 10000) * 3000 * YNORSIM_BIT_CHANGES;
   ynorsim_RestoreImage();
-- 
2.30.2