d88e88579f
Per discussion with the perf team: - Set performance cpuspeed governor - Set deadline io scheduler - Set kernel.sched_min_granularity_ns = 10000000 - Set kernel.sched_wakeup_granularity_ns = 15000000 - Set vm.dirty_ratio = 40 Signed-off-by: Jarod Wilson <jarod@redhat.com>
113 lines
2.6 KiB
Bash
Executable file
113 lines
2.6 KiB
Bash
Executable file
#!/bin/sh
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VAR_SUBSYS_KTUNE="/var/lock/subsys/ktune"
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CPUSPEED_SAVE_FILE="/var/run/ktune-cpuspeed.save"
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CPUSPEED_ORIG_GOV="var/run/ktune-cpuspeed-governor.save"
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CPUSPEED_CFG="/etc/sysconfig/cpuspeed"
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CPUSPEED_INIT="/etc/init.d/cpuspeed"
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CPUS="/sys/devices/system/cpu*/cpufreq"
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THP_ENABLE="/sys/kernel/mm/redhat_transparent_hugepage/enabled"
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THP_SAVE="/var/run/ktune-thp.save"
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start() {
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# Save currently enabled governor and/or cpuspeed config
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cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor > $CPUSPEED_ORIG_GOV
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if [ ! -e $CPUSPEED_SAVE_FILE -a -e $CPUSPEED_CFG ]; then
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cp -p $CPUSPEED_CFG $CPUSPEED_SAVE_FILE
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sed -e 's/^GOVERNOR=.*/GOVERNOR=performance/g' $CPUSPEED_SAVE_FILE > $CPUSPEED_CFG
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fi
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# Enable performance governor (best for maximum i/o throughput in most cases)
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if [ -e $CPUSPEED_INIT ]; then
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/sbin/service cpuspeed restart > /dev/null 2>&1
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else
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for cpu in $CPUS; do
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echo performance > $cpu/scaling_governor
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done
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fi
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# Make sure transparent hugepages are enabled
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cut -f2 -d'[' $THP_ENABLE | cut -f1 -d']' > $THP_SAVE
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(echo always > $THP_ENABLE) > /dev/null 2>&1
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return 0
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}
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stop() {
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# Restore previous cpuspeed config
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if [ -e $CPUSPEED_SAVE_FILE ]; then
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cp -fp $CPUSPEED_SAVE_FILE $CPUSPEED_CFG
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rm -f $CPUSPEED_SAVE_FILE
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fi
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# Re-enable previous governor
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if [ -e $CPUSPEED_INIT ]; then
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/sbin/service cpuspeed restart > /dev/null 2>&1
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elif [ -e $CPUSPEED_ORIG_GOV ]; then
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for cpu in $CPUS; do
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echo $(cat $CPUSPEED_ORIG_GOV) > $cpu/scaling_governor
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done
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else
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for cpu in $CPUS; do
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echo userspace > $cpu/scaling_governor
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cat $cpu/cpuinfo_max_freq > $cpu/scaling_setspeed
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done
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fi
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if [ -e $CPUSPEED_ORIG_GOV ]; then
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rm -f $CPUSPEED_ORIG_GOV
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fi
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# Restore transparent hugepages setting
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if [ -e $THP_SAVE ]; then
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(echo $(cat $THP_SAVE) > $THP_ENABLE) > /dev/null 2>&1
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rm -f $THP_SAVE
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fi
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return 0
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}
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reload() {
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start
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}
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status() {
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return 0
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}
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case "$1" in
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start)
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[ -f "$VAR_SUBSYS_KTUNE" ] && exit 0
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start
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RETVAL=$?
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;;
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stop)
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[ -f "$VAR_SUBSYS_KTUNE" ] || exit 0
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stop
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RETVAL=$?
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;;
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reload)
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[ -f "$VAR_SUBSYS_KTUNE" ] && reload
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RETVAL=$?
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;;
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restart|force-reload)
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[ -f "$VAR_SUBSYS_KTUNE" ] && stop
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start
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RETVAL=$?
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;;
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condrestart|try-restart)
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[ -f "$VAR_SUBSYS_KTUNE" ] || exit 0
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stop
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start
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RETVAL=$?
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;;
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status)
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status
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RETVAL=$?
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;;
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*)
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echo $"Usage: $0 {start|stop|restart|condrestart|status}"
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RETVAL=2
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;;
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esac
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