From d9aaef5b7c33449fbc22b435f6acf394e8c18ca7 Mon Sep 17 00:00:00 2001
From: mischa <mischa@rx.high5.nl>
Date: Wed, 28 Oct 2020 21:02:22 +0100
Subject: [PATCH] added staggering to startall.sh

---
 startall.sh | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/startall.sh b/startall.sh
index 45d47a4..b4255fd 100755
--- a/startall.sh
+++ b/startall.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright (c) 2019 Mischa Peters <mischa @ openbsd.amsterdam>
+# Copyright (c) 2019-2020 Mischa Peters <mischa @ openbsd.amsterdam>
 #
 # Permission to use, copy, modify, and distribute this software for any
 # purpose with or without fee is hereby granted, provided that the above
@@ -14,4 +14,25 @@
 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #
-vmctl show | for i in $(awk '/ - / {print $9}'); do echo ${i}; doas vmctl start $i; sleep 90; done
+SLEEP=300
+CPU=$(sysctl -n hw.ncpuonline)
+CPU=$((${CPU}-2))
+
+COUNTER=0
+for i in $(vmctl show | sort | awk '/ - / {print $9}' | xargs); do
+	VMS[${COUNTER}]=${i}
+	COUNTER=$((${COUNTER}+1))
+done
+
+CYCLES=$((${#VMS[*]}/${CPU}+1))
+echo "Starting ${#VMS[*]} VMs on ${CPU} CPUs in ${CYCLES} cycle(s), waiting ${SLEEP} seconds after each cycle."
+
+COUNTER=0
+for i in ${VMS[*]}; do
+	COUNTER=$((${COUNTER}+1))
+	vmctl start ${i}
+	if [ $COUNTER -eq $CPU ]; then
+		sleep ${SLEEP}
+		COUNTER=0
+	fi
+done