Rename instance_id to shm_id and make it default to pid

By default, all SPDK applications will not share memory.
To share memory, start the applications with the same
shared memory id.

Change-Id: Ib6180369ef0ed12d05983a21d7943e467402b21a
Signed-off-by: Ben Walker <benjamin.walker@intel.com>

app/iscsi_tgt/iscsi_tgt.c

@@ -71,7 +71,7 @@ usage(char *executable_name)
 	printf(" -c config  config file (default %s)\n", SPDK_ISCSI_DEFAULT_CONFIG);
 	printf(" -e mask    tracepoint group mask for spdk trace buffers (default 0x0)\n");
 	printf(" -m mask    core mask for DPDK\n");
-	printf(" -i instance ID\n");
+	printf(" -i shared memory ID (optional)\n");
 	printf(" -l facility use specific syslog facility (default %s)\n",
 	       opts.log_facility);
 	printf(" -n channel number of memory channels used for DPDK\n");
@@ -116,7 +116,7 @@ main(int argc, char **argv)
 			opts.config_file = optarg;
 			break;
 		case 'i':
-			opts.instance_id = atoi(optarg);
+			opts.shm_id = atoi(optarg);
 			break;
 		case 'l':
 			opts.log_facility = optarg;

app/iscsi_top/iscsi_top.cpp

@@ -54,14 +54,14 @@ extern "C" {
 }
 
 static char *exe_name;
-static int g_instance_id = 0;
+static int g_shm_id = 0;
 
 static void usage(void)
 {
 	fprintf(stderr, "usage:\n");
 	fprintf(stderr, "   %s <option>\n", exe_name);
-	fprintf(stderr, "        option = '-i' to specify the instance ID,"
+	fprintf(stderr, "        option = '-i' to specify the shared memory ID,"
-		" (default: 0)\n");
+		" (required)\n");
 }
 
 static bool
@@ -90,7 +90,7 @@ print_connections(void)
 	int			fd, i;
 	char			shm_name[64];
 
-	sprintf(shm_name, "spdk_iscsi_conns.%d", g_instance_id);
+	sprintf(shm_name, "spdk_iscsi_conns.%d", g_shm_id);
 	fd = shm_open(shm_name, O_RDONLY, 0600);
 	if (fd < 0) {
 		fprintf(stderr, "Cannot open shared memory: %s\n", shm_name);
@@ -150,7 +150,7 @@ int main(int argc, char **argv)
 	while ((op = getopt(argc, argv, "i:")) != -1) {
 		switch (op) {
 		case 'i':
-			g_instance_id = atoi(optarg);
+			g_shm_id = atoi(optarg);
 			break;
 		default:
 			usage();
@@ -158,7 +158,7 @@ int main(int argc, char **argv)
 		}
 	}
 
-	sprintf(spdk_trace_shm_name, "/iscsi_trace.%d", g_instance_id);
+	sprintf(spdk_trace_shm_name, "/iscsi_trace.%d", g_shm_id);
 	history_fd = shm_open(spdk_trace_shm_name, O_RDONLY, 0600);
 	if (history_fd < 0) {
 		fprintf(stderr, "Unable to open history shm %s\n", spdk_trace_shm_name);

app/nvmf_tgt/nvmf_tgt.c

@@ -305,7 +305,7 @@ usage(void)
 	printf(" -c config  - config file (default %s)\n", SPDK_NVMF_DEFAULT_CONFIG);
 	printf(" -e mask    - tracepoint group mask for spdk trace buffers (default 0x0)\n");
 	printf(" -m mask    - core mask for DPDK\n");
-	printf(" -i instance ID\n");
+	printf(" -i shared memory ID (optional)\n");
 	printf(" -l facility - use specific syslog facility (default %s)\n",
 	       opts.log_facility);
 	printf(" -n channel number of memory channels used for DPDK\n");
@@ -408,7 +408,7 @@ main(int argc, char **argv)
 			opts.config_file = optarg;
 			break;
 		case 'i':
-			opts.instance_id = atoi(optarg);
+			opts.shm_id = atoi(optarg);
 			break;
 		case 'l':
 			opts.log_facility = optarg;

app/trace/trace.cpp

@@ -94,7 +94,7 @@ struct object_stats g_stats[SPDK_TRACE_MAX_OBJECT];
 
 static char *exe_name;
 static int verbose = 1;
-static int g_instance_id = 0;
+static int g_shm_id = 0;
 static int g_fudge_factor = 20;
 
 static uint64_t tsc_rate;
@@ -306,7 +306,7 @@ static void usage(void)
 	fprintf(stderr, "                 '-c' to display single lcore history\n");
 	fprintf(stderr, "                 '-f' to specify number of events to ignore at\n");
 	fprintf(stderr, "                      beginning and end of trace (default: 20)\n");
-	fprintf(stderr, "                 '-i' to specify the instance ID, (default: 0)\n");
+	fprintf(stderr, "                 '-i' to specify the shared memory ID, (required)\n");
 }
 
 int main(int argc, char **argv)
@@ -336,7 +336,7 @@ int main(int argc, char **argv)
 			g_fudge_factor = atoi(optarg);
 			break;
 		case 'i':
-			g_instance_id = atoi(optarg);
+			g_shm_id = atoi(optarg);
 			break;
 		case 'q':
 			verbose = 0;
@@ -350,7 +350,7 @@ int main(int argc, char **argv)
 		}
 	}
 
-	snprintf(shm_name, sizeof(shm_name), "/%s_trace.%d", app_name, g_instance_id);
+	snprintf(shm_name, sizeof(shm_name), "/%s_trace.%d", app_name, g_shm_id);
 	fd = shm_open(shm_name, O_RDONLY, 0600);
 	if (fd < 0) {
 		fprintf(stderr, "Could not open shm %s.\n", shm_name);

etc/spdk/iscsi.conf.in

@@ -10,9 +10,9 @@
 # Bracketed ([]) names define sections
 
 [Global]
-  # Instance ID for multi-process support
+  # Shared Memory Group ID. SPDK applications with the same ID will share memory.
-  # Default: 0
+  # Default: <the process PID>
-  #InstanceID 0
+  #SharedMemoryID 0
 
   # Users can restrict work items to only run on certain cores by
   #  specifying a ReactorMask.  Default is to allow work items to run

examples/nvme/arbitration/arbitration.c

@@ -87,6 +87,7 @@ struct worker_thread {
 };
 
 struct arb_context {
+	int					shm_id;
 	int					outstanding_commands;
 	int					num_namespaces;
 	int					num_workers;
@@ -119,6 +120,7 @@ static struct worker_thread *g_workers		= NULL;
 static struct feature features[256];
 
 static struct arb_context g_arbitration = {
+	.shm_id					= -1,
 	.outstanding_commands			= 0,
 	.num_workers				= 0,
 	.num_namespaces				= 0,
@@ -521,7 +523,8 @@ usage(char *program_name)
 	printf("\t\t(2: vendor specific mechanism)]\n");
 	printf("\t[-b enable arbitration user configuration, default: disabled]\n");
 	printf("\t\t(0 - disabled; 1 - enabled)\n");
-	printf("\t[-i subjected IOs for performance comparison]\n");
+	printf("\t[-n subjected IOs for performance comparison]\n");
+	printf("\t[-i shared memory group ID]\n");
 }
 
 static const char *
@@ -682,11 +685,14 @@ parse_args(int argc, char **argv)
 	int op				= 0;
 	bool mix_specified		= false;
 
-	while ((op = getopt(argc, argv, "c:l:m:q:s:t:w:M:a:b:i:h")) != -1) {
+	while ((op = getopt(argc, argv, "c:l:i:m:q:s:t:w:M:a:b:n:h")) != -1) {
 		switch (op) {
 		case 'c':
 			g_arbitration.core_mask = optarg;
 			break;
+		case 'i':
+			g_arbitration.shm_id = atoi(optarg);
+			break;
 		case 'l':
 			g_arbitration.latency_tracking_enable = atoi(optarg);
 			break;
@@ -715,7 +721,7 @@ parse_args(int argc, char **argv)
 		case 'b':
 			g_arbitration.arbitration_config = atoi(optarg);
 			break;
-		case 'i':
+		case 'n':
 			g_arbitration.io_count = atoi(optarg);
 			break;
 		case 'h':
@@ -1082,6 +1088,7 @@ static char *ealargs[] = {
 	"--proc-type=auto",
 #ifdef __linux__
 	"--base-virtaddr=0x1000000000",
+	"", /* May be replaced by --file-prefix */
 #endif
 };
 
@@ -1092,6 +1099,9 @@ main(int argc, char **argv)
 	struct worker_thread *worker;
 	char task_pool_name[30];
 	uint32_t task_count;
+	size_t argcount;
+	char *core_mask = NULL;
+	char *file_prefix = NULL;
 
 	rc = parse_args(argc, argv);
 	if (rc != 0) {
@@ -1099,15 +1109,30 @@ main(int argc, char **argv)
 	}
 
 	/* Default 4 cores for (urgent / high / medium / low) 4 kinds of queues respectively */
-	ealargs[1] = spdk_sprintf_alloc("-c %s", g_arbitration.core_mask);
+	ealargs[1] = core_mask = spdk_sprintf_alloc("-c %s", g_arbitration.core_mask);
 	if (ealargs[1] == NULL) {
 		perror("ealargs spdk_sprintf_alloc");
 		return 1;
 	}
 
-	rc = rte_eal_init(sizeof(ealargs) / sizeof(ealargs[0]), ealargs);
 
-	free(ealargs[1]);
+	argcount = (sizeof(ealargs) / sizeof(ealargs[0])) - 1;
+
+#ifdef __linux__
+	if (g_arbitration.shm_id >= 0) {
+		ealargs[5] = file_prefix = spdk_sprintf_alloc("--file-prefix=spdk%d",
+					   g_arbitration.shm_id);
+		argcount++;
+	}
+#endif
+
+	rc = rte_eal_init(argcount, ealargs);
+
+	free(core_mask);
+
+	if (file_prefix) {
+		free(file_prefix);
+	}
 
 	if (rc < 0) {
 		fprintf(stderr, "could not initialize dpdk\n");

examples/nvme/perf/perf.c

@@ -148,6 +148,7 @@ static int g_queue_depth;
 static int g_time_in_sec;
 static uint32_t g_max_completions;
 static int g_dpdk_mem;
+static int g_shm_id = -1;
 
 static const char *g_core_mask;
 
@@ -661,6 +662,7 @@ static void usage(char *program_name)
 	printf("\t[-d DPDK huge memory size in MB.]\n");
 	printf("\t[-m max completions per poll]\n");
 	printf("\t\t(default: 0 - unlimited)\n");
+	printf("\t[-i shared memory group ID]\n");
 }
 
 static void
@@ -854,7 +856,7 @@ parse_args(int argc, char **argv)
 	g_core_mask = NULL;
 	g_max_completions = 0;
 
-	while ((op = getopt(argc, argv, "c:d:lm:q:r:s:t:w:M:")) != -1) {
+	while ((op = getopt(argc, argv, "c:d:i:lm:q:r:s:t:w:M:")) != -1) {
 		switch (op) {
 		case 'c':
 			g_core_mask = optarg;
@@ -862,6 +864,9 @@ parse_args(int argc, char **argv)
 		case 'd':
 			g_dpdk_mem = atoi(optarg);
 			break;
+		case 'i':
+			g_shm_id = atoi(optarg);
+			break;
 		case 'l':
 			g_latency_tracking_enable = true;
 			break;
@@ -1196,7 +1201,9 @@ static char *ealargs[] = {
 	"--proc-type=auto",
 #ifdef __linux__
 	"--base-virtaddr=0x1000000000",
+	"", /* May be replaced by --file-prefix */
 #endif
+
 };
 
 int main(int argc, char **argv)
@@ -1205,29 +1212,47 @@ int main(int argc, char **argv)
 	struct worker_thread *worker;
 	char task_pool_name[30];
 	uint32_t task_count;
+	size_t argcount;
+	char *core_mask = NULL;
+	char *mem_size = NULL;
+	char *file_prefix = NULL;
 
 	rc = parse_args(argc, argv);
 	if (rc != 0) {
 		return rc;
 	}
 
-	ealargs[1] = spdk_sprintf_alloc("-c %s", g_core_mask ? g_core_mask : "0x1");
+	ealargs[1] = core_mask = spdk_sprintf_alloc("-c %s", g_core_mask ? g_core_mask : "0x1");
 	if (ealargs[1] == NULL) {
 		perror("ealargs spdk_sprintf_alloc");
 		return 1;
 	}
 
-	ealargs[3] = spdk_sprintf_alloc("-m %d", g_dpdk_mem ? g_dpdk_mem : 512);
+	ealargs[3] = mem_size = spdk_sprintf_alloc("-m %d", g_dpdk_mem ? g_dpdk_mem : 512);
 	if (ealargs[3] == NULL) {
 		free(ealargs[1]);
 		perror("ealargs spdk_sprintf_alloc");
 		return 1;
 	}
 
-	rc = rte_eal_init(sizeof(ealargs) / sizeof(ealargs[0]), ealargs);
+	argcount = (sizeof(ealargs) / sizeof(ealargs[0])) - 1;
 
-	free(ealargs[1]);
+#ifdef __linux__
-	free(ealargs[3]);
+	if (g_shm_id >= 0) {
+		ealargs[6] = file_prefix = spdk_sprintf_alloc("--file-prefix=spdk%d",
+					   g_shm_id);
+		argcount++;
+	}
+#endif
+
+	rc = rte_eal_init(argcount, ealargs);
+
+	free(core_mask);
+	free(mem_size);
+
+	if (file_prefix) {
+		free(file_prefix);
+	}
 
 	if (rc < 0) {
 		fprintf(stderr, "could not initialize dpdk\n");

include/spdk/event.h

@@ -75,7 +75,7 @@ struct spdk_app_opts {
 	const char *log_facility;
 	const char *tpoint_group_mask;
 
-	int instance_id;
+	int shm_id;
 
 	spdk_app_shutdown_cb	shutdown_cb;
 	spdk_sighandler_t	usr1_handler;
@@ -139,9 +139,9 @@ void spdk_app_stop(int rc);
 int spdk_app_get_running_config(char **config_str, char *name);
 
 /**
- * \brief Return the instance id for this application.
+ * \brief Return the shared memory id for this application.
 */
-int spdk_app_get_instance_id(void);
+int spdk_app_get_shm_id(void);
 
 /**
  * \brief Convert a string containing a CPU core mask into a bitmask

lib/event/app.c

@@ -68,7 +68,7 @@
 struct spdk_app {
 	struct spdk_conf		*config;
 	char				pidfile[SPDK_APP_PIDFILE_MAX_LENGTH];
-	int				instance_id;
+	int				shm_id;
 	spdk_app_shutdown_cb		shutdown_cb;
 	int				rc;
 };
@@ -80,9 +80,9 @@ static int spdk_app_write_pidfile(void);
 static void spdk_app_remove_pidfile(void);
 
 int
-spdk_app_get_instance_id(void)
+spdk_app_get_shm_id(void)
 {
-	return g_spdk_app.instance_id;
+	return g_spdk_app.shm_id;
 }
 
 /* Global section */
@@ -224,7 +224,7 @@ spdk_app_opts_init(struct spdk_app_opts *opts)
 
 	opts->log_facility = SPDK_APP_DEFAULT_LOG_FACILITY;
 	opts->enable_coredump = true;
-	opts->instance_id = -1;
+	opts->shm_id = -1;
 	opts->dpdk_mem_size = SPDK_APP_DPDK_DEFAULT_MEM_SIZE;
 	opts->dpdk_master_core = SPDK_APP_DPDK_DEFAULT_MASTER_CORE;
 	opts->dpdk_mem_channel = SPDK_APP_DPDK_DEFAULT_MEM_CHANNEL;
@@ -268,23 +268,23 @@ spdk_app_init(struct spdk_app_opts *opts)
 	}
 	spdk_conf_set_as_default(config);
 
-	if (opts->instance_id == -1) {
+	if (opts->shm_id == -1) {
 		sp = spdk_conf_find_section(config, "Global");
 		if (sp != NULL) {
-			opts->instance_id = spdk_conf_section_get_intval(sp, "InstanceID");
+			opts->shm_id = spdk_conf_section_get_intval(sp, "SharedMemoryID");
 		}
 	}
 
-	if (opts->instance_id < 0) {
+	if (opts->shm_id < 0) {
-		opts->instance_id = 0;
+		opts->shm_id = getpid();
 	}
 
 	memset(&g_spdk_app, 0, sizeof(g_spdk_app));
 	g_spdk_app.config = config;
-	g_spdk_app.instance_id = opts->instance_id;
+	g_spdk_app.shm_id = opts->shm_id;
 	g_spdk_app.shutdown_cb = opts->shutdown_cb;
 	snprintf(g_spdk_app.pidfile, sizeof(g_spdk_app.pidfile), "%s/%s.pid.%d",
-		 SPDK_APP_PIDFILE_PREFIX, opts->name, opts->instance_id);
+		 SPDK_APP_PIDFILE_PREFIX, opts->name, opts->shm_id);
 	spdk_app_write_pidfile();
 
 	/* open log files */
@@ -391,7 +391,7 @@ spdk_app_init(struct spdk_app_opts *opts)
 	sigaddset(&signew, SIGHUP);
 	pthread_sigmask(SIG_SETMASK, &signew, NULL);
 
-	snprintf(shm_name, sizeof(shm_name), "/%s_trace.%d", opts->name, opts->instance_id);
+	snprintf(shm_name, sizeof(shm_name), "/%s_trace.%d", opts->name, opts->shm_id);
 	spdk_trace_init(shm_name);
 
 	if (opts->tpoint_group_mask == NULL) {

lib/event/dpdk_init.c

@@ -146,8 +146,8 @@ spdk_build_eal_cmdline(struct spdk_app_opts *opts)
 
 #ifdef __linux__
 	/* set the hugepage file prefix */
-	g_arg_strings[EAL_FILE_PREFIX_ARG] = spdk_sprintf_alloc("--file-prefix=rte%d",
+	g_arg_strings[EAL_FILE_PREFIX_ARG] = spdk_sprintf_alloc("--file-prefix=spdk%d",
-					     opts->instance_id);
+					     opts->shm_id);
 #else
 	/* --file-prefix is not required on FreeBSD */
 	g_arg_strings[EAL_FILE_PREFIX_ARG] = strdup("");

lib/iscsi/conn.c

@@ -249,7 +249,7 @@ int spdk_initialize_iscsi_conns(void)
 		return -1;
 	}
 
-	snprintf(g_shm_name, sizeof(g_shm_name), "spdk_iscsi_conns.%d", spdk_app_get_instance_id());
+	snprintf(g_shm_name, sizeof(g_shm_name), "spdk_iscsi_conns.%d", spdk_app_get_shm_id());
 	conns_array_fd = shm_open(g_shm_name, O_RDWR | O_CREAT, 0600);
 	if (conns_array_fd < 0) {
 		SPDK_ERRLOG("could not shm_open %s\n", g_shm_name);

test/iscsi_tgt/ip_migration/ip_migration.sh

@@ -51,7 +51,7 @@ do
 	cp $testdir/iscsi.conf $testdir/iscsi.conf.$i
 	port=$(($RPC_PORT + $i))
 	echo "Listen 127.0.0.1:$port" >> $testdir/iscsi.conf.$i
-	$exe -c $testdir/iscsi.conf.$i -i $i -s 1000 &
+	$exe -c $testdir/iscsi.conf.$i -s 1000 -i $i &
 	pid=$!
 	echo "Process pid: $pid"
 

test/lib/nvme/nvme.sh

@@ -57,22 +57,22 @@ timing_exit arbitration
 
 if [ $(uname -s) = Linux ]; then
 	timing_enter multi_process
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 10 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 10 -c 0xf &
 	pid=$!
 	sleep 3
-	$rootdir/examples/nvme/perf/perf -q 1 -w randread -s 4096 -t 10 -c 0x10 &
+	$rootdir/examples/nvme/perf/perf -i 0 -q 1 -w randread -s 4096 -t 10 -c 0x10 &
 	sleep 1
 	kill -9 $!
 	count=0
 	while [ $count -le 2 ]; do
-		$rootdir/examples/nvme/perf/perf -q 1 -w read -s 4096 -t 1 -c 0x10
+		$rootdir/examples/nvme/perf/perf -i 0 -q 1 -w read -s 4096 -t 1 -c 0x10
 		count=$(($count + 1))
 	done
 	count=0
 	while [ $count -le 1 ]; do
 		core=$((1 << (($count + 4))))
 		printf -v hexcore "0x%x" "$core"
-		$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 1 -c $hexcore &
+		$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 1 -c $hexcore &
 		count=$(($count + 1))
 	done
 	wait $pid

test/lib/nvme/nvmemp.sh

@@ -10,26 +10,26 @@ if [ $(uname -s) = Linux ]; then
         timing_enter nvme_mp
 
 	timing_enter mp_func_test
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 5 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 5 -c 0xf &
 	sleep 3
-	$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 1 -c 0x10
+	$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 1 -c 0x10
 	wait $!
 	timing_exit mp_func_test
 
 	timing_enter mp_fault_test
 	timing_enter mp_fault_test_1
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 5 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 5 -c 0xf &
 	sleep 3
-	$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 3 -c 0x10
+	$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 3 -c 0x10
 	sleep 1
 	kill -9 $!
 	timing_exit mp_fault_test_1
 
 	timing_enter mp_fault_test_2
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 7 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 7 -c 0xf &
 	pid=$!
 	sleep 3
-	$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 3 -c 0x10 &
+	$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 3 -c 0x10 &
 	sleep 2
 	kill -9 $!
 	wait $pid
@@ -38,23 +38,23 @@ if [ $(uname -s) = Linux ]; then
 
 	timing_enter mp_stress_test
 	timing_enter mp_stress_test_1
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 10 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 10 -c 0xf &
 	sleep 3
 	count=0
 	while [ $count -le 4 ]; do
-		$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 1 -c 0x10
+		$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 1 -c 0x10
 		count=$(( $count + 1 ))
 	done
 	wait $!
 	timing_exit mp_stress_test_1
 
 	timing_enter mp_stress_test_2
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 15 -c 0xf &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 15 -c 0xf &
 	pid=$!
 	sleep 3
 	count=0
 	while [ $count -le 4 ]; do
-		$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 3 -c 0x10 &
+		$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 3 -c 0x10 &
 		sleep 2
 		kill -9 $!
 		count=$(( $count + 1 ))
@@ -63,14 +63,14 @@ if [ $(uname -s) = Linux ]; then
 	timing_exit mp_stress_test_2
 
 	timing_enter mp_stress_test_3
-	$rootdir/examples/nvme/arbitration/arbitration -s 4096 -t 10 &
+	$rootdir/examples/nvme/arbitration/arbitration -i 0 -s 4096 -t 10 &
 	pid=$!
 	sleep 3
 	count=0
 	while [ $count -le 4 ]; do
 		core=$((1 << (($count + 4))))
 		printf -v hexcore "0x%x" "$core"
-		$rootdir/examples/nvme/perf/perf -q 128 -w read -s 4096 -t 1 -c $hexcore &
+		$rootdir/examples/nvme/perf/perf -i 0 -q 128 -w read -s 4096 -t 1 -c $hexcore &
 		count=$(( $count + 1 ))
 	done
 	wait $pid
@@ -78,12 +78,12 @@ if [ $(uname -s) = Linux ]; then
 	timing_exit mp_stress_test
 
 	timing_enter mp_perf_test
-	$rootdir/examples/nvme/perf/perf -q 1 -w randread -s 4096 -t 5 -c 0x3
+	$rootdir/examples/nvme/perf/perf -i 0 -q 1 -w randread -s 4096 -t 5 -c 0x3
 	sleep 3
 
-	$rootdir/examples/nvme/perf/perf -q 1 -w randread -s 4096 -t 8 -c 0x1 &
+	$rootdir/examples/nvme/perf/perf -i 0 -q 1 -w randread -s 4096 -t 8 -c 0x1 &
 	sleep 3
-	$rootdir/examples/nvme/perf/perf -q 1 -w randread -s 4096 -t 3 -c 0x2
+	$rootdir/examples/nvme/perf/perf -i 0 -q 1 -w randread -s 4096 -t 3 -c 0x2
 	wait $!
 	timing_exit mp_perf_test