c2dfc1f806
In the cpu-partitioning profile, IRQ affinity change is already done as part of the 'isolated_cores' option of the scheduler plugin, so calling defirqaffinity is, at best, redundant. So let's remove the call. In the realtime* profiles, it's essentially the same, except that tuna was used instead of isolated_cores. So let's use built-in functionality instead of tuna and drop calls to defirqaffinity. Resolves: rhbz#1590937 Signed-off-by: Ondřej Lysoněk <olysonek@redhat.com>
112 lines
3.1 KiB
Bash
Executable file
112 lines
3.1 KiB
Bash
Executable file
#!/bin/sh
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. /usr/lib/tuned/functions
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CACHE_VALUE_FILE=./lapic_timer_adv_ns
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CACHE_CPU_FILE=./lapic_timer_adv_ns.cpumodel
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KVM_LAPIC_FILE=/sys/module/kvm/parameters/lapic_timer_advance_ns
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QEMU=$(type -P qemu-kvm || echo /usr/libexec/qemu-kvm)
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TSCDEADLINE_LATENCY="/usr/share/qemu-kvm/tscdeadline_latency.flat"
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if [ ! -f "$TSCDEADLINE_LATENCY" ]; then
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TSCDEADLINE_LATENCY="/usr/share/tuned/tscdeadline_latency.flat"
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fi
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run_tsc_deadline_latency()
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{
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dir=`mktemp -d`
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for i in `seq 1000 500 7000`; do
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echo $i > $KVM_LAPIC_FILE
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chrt -f 1 taskset -c $1 $QEMU -enable-kvm -device pc-testdev \
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-device isa-debug-exit,iobase=0xf4,iosize=0x4 \
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-display none -serial stdio -device pci-testdev \
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-kernel "$TSCDEADLINE_LATENCY" \
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-cpu host | grep latency | cut -f 2 -d ":" > $dir/out
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if [ ! -f $dir/out ]; then
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die running $TSCDEADLINE_LATENCY failed
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fi
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tmp=$(wc -l $dir/out | awk '{ print $1 }')
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if [ $tmp -eq 0 ]; then
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die running $TSCDEADLINE_LATENCY failed
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fi
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A=0
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while read l; do
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A=$(($A+$l))
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done < $dir/out
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lines=`wc -l $dir/out | cut -f 1 -d " "`
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ans=$(($A/$lines))
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echo $i: $ans
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done
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}
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start() {
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setup_kvm_mod_low_latency
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disable_ksm
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# If CPU model has changed, clean the cache
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if [ -f $CACHE_CPU_FILE ]; then
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curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq`
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if [ -z "$curmodel" ]; then
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die failed to read CPU model
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fi
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genmodel=`cat $CACHE_CPU_FILE`
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if [ "$curmodel" != "$genmodel" ]; then
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rm -f $CACHE_VALUE_FILE
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rm -f $CACHE_CPU_FILE
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fi
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fi
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# If the cache is empty, find the best lapic_timer_advance_ns value
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# and cache it
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if [ ! -f $KVM_LAPIC_FILE ]; then
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die $KVM_LAPIC_FILE not found
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fi
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if [ ! -f $CACHE_VALUE_FILE ]; then
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if [ -f "$TSCDEADLINE_LATENCY" ]; then
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tempdir=`mktemp -d`
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isolatedcpu=`echo "$TUNED_isolated_cores_expanded" | cut -f 1 -d ","`
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run_tsc_deadline_latency $isolatedcpu > $tempdir/lat.out
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if ! ./find-lapictscdeadline-optimal.sh $tempdir/lat.out > $tempdir/opt.out; then
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die could not find optimal latency
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fi
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echo `cat $tempdir/opt.out | cut -f 2 -d ":"` > $CACHE_VALUE_FILE
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curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq`
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echo "$curmodel" > $CACHE_CPU_FILE
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fi
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fi
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if [ -f $CACHE_VALUE_FILE ]; then
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echo `cat $CACHE_VALUE_FILE` > $KVM_LAPIC_FILE
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fi
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return 0
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}
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stop() {
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[ "$1" = "full_rollback" ] && teardown_kvm_mod_low_latency
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enable_ksm
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return "$?"
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}
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verify() {
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if [ -f /sys/module/kvm/parameters/kvmclock_periodic_sync ]; then
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test "$(cat /sys/module/kvm/parameters/kvmclock_periodic_sync)" = 0
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retval=$?
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fi
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if [ $retval -eq 0 -a -f /sys/module/kvm_intel/parameters/ple_gap ]; then
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test "$(cat /sys/module/kvm_intel/parameters/ple_gap)" = 0
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retval=$?
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fi
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return $retval
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}
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process $@
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