From 5554fbef46710c1317dc7f35889bc7e888026a25 Mon Sep 17 00:00:00 2001
From: Jouni Malinen <j@w1.fi>
Date: Sun, 21 Dec 2014 22:04:54 +0200
Subject: [PATCH] tests: Make parallel VM start a bit more resource friendly

Wait one second between each kvm start to avoid hitting large number of
processes trying to start in parallel. This allows the VMs to be started
more efficiently for parallel-vm.py runs with large number of VMs.

Signed-off-by: Jouni Malinen <j@w1.fi>
---
 tests/hwsim/vm/parallel-vm.py |  2 +-
 tests/hwsim/vm/vm-run.sh      | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/tests/hwsim/vm/parallel-vm.py b/tests/hwsim/vm/parallel-vm.py
index a1e253c45..4ab2eede6 100755
--- a/tests/hwsim/vm/parallel-vm.py
+++ b/tests/hwsim/vm/parallel-vm.py
@@ -192,7 +192,7 @@ def main():
     vm = {}
     for i in range(0, num_servers):
         print("\rStarting virtual machine {}/{}".format(i + 1, num_servers)),
-        cmd = ['./vm-run.sh', '--timestamp', str(timestamp),
+        cmd = ['./vm-run.sh', '--delay', str(i), '--timestamp', str(timestamp),
                '--ext', 'srv.%d' % (i + 1),
                '-i'] + codecov_args + extra_args
         vm[i] = {}
diff --git a/tests/hwsim/vm/vm-run.sh b/tests/hwsim/vm/vm-run.sh
index e6d99d354..77703bf58 100755
--- a/tests/hwsim/vm/vm-run.sh
+++ b/tests/hwsim/vm/vm-run.sh
@@ -47,6 +47,7 @@ TIMESTAMP=$(date +%s)
 DATE=$TIMESTAMP
 CODECOV=no
 TIMEWARP=0
+DELAY=0
 CODECOV_DIR=
 while [ "$1" != "" ]; do
 	case $1 in
@@ -68,6 +69,10 @@ while [ "$1" != "" ]; do
 		--timewrap ) shift
 			TIMEWARP=1
 			;;
+	        --delay ) shift
+			DELAY=$1
+			shift
+			;;
 		* )
 			RUN_TEST_ARGS="$RUN_TEST_ARGS$1 "
 			shift
@@ -89,6 +94,11 @@ else
     CODECOV=no
 fi
 
+if [ $DELAY -gt 0 ]; then
+    echo "Wait $DELAY seconds before starting VM"
+    sleep $DELAY
+fi
+
 echo "Starting test run in a virtual machine"
 
 kvm \