test/vhost_perf: use system fio if not specified by user

Use system-wide fio if a specific binary was not provided.
Additionally add 1 second delay after finishing fio run
to make sure fio client-server finishes correctly.

Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Change-Id: Id7d1e7f70017755206c8fe9942ef8d6051a73bbe
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2559
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>

test/vhost/common.sh

@@ -1066,6 +1066,10 @@ function run_fio() {
 		return 1
 	fi
 
+	if [[ -z "$fio_bin" ]]; then
+		fio_bin="fio"
+	fi
+
 	if [[ ! -r "$job_file" ]]; then
 		error "Fio job '$job_file' does not exist"
 		return 1
@@ -1121,6 +1125,7 @@ function run_fio() {
 	fi
 
 	$fio_start_cmd
+	sleep 1
 
 	if [[ ! $hide_results ]]; then
 		cat $out/$log_fname

test/vhost/perf_bench/vhost_perf.sh

@@ -23,7 +23,6 @@ split_bdevs=()
 used_vms=""
 wwpn_prefix="naa.5001405bc6498"
 
-fio_bin="--fio-bin=/home/sys_sgsw/fio_ubuntu"
 fio_iterations=1
 precond_fio_bin=$CONFIG_FIO_SOURCE_DIR/fio
 disk_map=""