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167 changes: 167 additions & 0 deletions
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assets/tuned/patches/030-realtime-virt-host-drop_lapic_calc.diff
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| The LAPIC advancement improvement is minimal (3 or 4 us) and its | ||
| calculation has shown to be problematic under certain | ||
| scenarios (for example if qemu-kvm is not installed). | ||
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| Remove it. | ||
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| See: https://github.com/redhat-performance/tuned/pull/288 | ||
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| diff --git a/profiles/realtime-virtual-host/find-lapictscdeadline-optimal.sh b/profiles/realtime-virtual-host/find-lapictscdeadline-optimal.sh | ||
| deleted file mode 100755 | ||
| index 539c47e1..00000000 | ||
| --- a/profiles/realtime-virtual-host/find-lapictscdeadline-optimal.sh | ||
| +++ /dev/null | ||
| @@ -1,30 +0,0 @@ | ||
| -#!/bin/bash | ||
| - | ||
| -: ${1?"Usage: $0 latency-file"} | ||
| - | ||
| -lines=`wc -l $1 | cut -f 1 -d " "` | ||
| -in_range=0 | ||
| -prev_value=1 | ||
| -for i in `seq 1 $lines`; do | ||
| - a=`awk "NR==$i" $1 | cut -f 2 -d ":"` | ||
| - value=$(($a*100/$prev_value)) | ||
| - if [ $value -ge 98 -a $value -le 102 ]; then | ||
| - in_range=$(($in_range + 1)) | ||
| - else | ||
| - in_range=0 | ||
| - fi | ||
| - if [ $in_range -ge 2 ]; then | ||
| - echo -n "optimal value for lapic_timer_advance_ns is: " | ||
| - awk "NR==$(($i - 1))" $1 | cut -f 1 -d ":" | ||
| - exit 0 | ||
| - fi | ||
| - prev_value=$a | ||
| -done | ||
| -# if still decreasing, then use highest ns value | ||
| -if [ $value -le 99 ]; then | ||
| - echo -n "optimal value for lapic_timer_advance_ns is: " | ||
| - awk "NR==$(($i - 1))" $1 | cut -f 1 -d ":" | ||
| - exit 0 | ||
| -fi | ||
| -echo optimal not found | ||
| -exit 1 | ||
| diff --git a/profiles/realtime-virtual-host/script.sh b/profiles/realtime-virtual-host/script.sh | ||
| index edae6c59..a11dac75 100755 | ||
| --- a/profiles/realtime-virtual-host/script.sh | ||
| +++ b/profiles/realtime-virtual-host/script.sh | ||
| @@ -2,102 +2,13 @@ | ||
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| . /usr/lib/tuned/functions | ||
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| -CACHE_VALUE_FILE=./lapic_timer_adv_ns | ||
| -CACHE_CPU_FILE=./lapic_timer_adv_ns.cpumodel | ||
| -KVM_LAPIC_FILE=/sys/module/kvm/parameters/lapic_timer_advance_ns | ||
| KTIMER_LOCKLESS_FILE=/sys/kernel/ktimer_lockless_check | ||
| -QEMU=$(type -P qemu-kvm || echo /usr/libexec/qemu-kvm) | ||
| -TSCDEADLINE_LATENCY="/usr/share/qemu-kvm/tscdeadline_latency.flat" | ||
| -[ -f "$TSCDEADLINE_LATENCY" ] || TSCDEADLINE_LATENCY="/usr/share/tuned-profiles-nfv-host-bin/tscdeadline_latency.flat" | ||
| -[ -f "$TSCDEADLINE_LATENCY" ] || TSCDEADLINE_LATENCY="/usr/share/tuned/tscdeadline_latency.flat" | ||
| - | ||
| -run_tsc_deadline_latency() | ||
| -{ | ||
| - dir=`mktemp -d` | ||
| - | ||
| - for i in `seq 1000 500 7000`; do | ||
| - echo $i > $KVM_LAPIC_FILE | ||
| - | ||
| - unixpath=`mktemp` | ||
| - | ||
| - chrt -f 1 $QEMU -S -enable-kvm -device pc-testdev \ | ||
| - -device isa-debug-exit,iobase=0xf4,iosize=0x4 \ | ||
| - -display none -serial stdio -device pci-testdev \ | ||
| - -kernel "$TSCDEADLINE_LATENCY" \ | ||
| - -cpu host,tsc-deadline=on \ | ||
| - -mon chardev=char0,mode=readline \ | ||
| - -chardev socket,id=char0,nowait,path=$unixpath,server | grep latency | cut -f 2 -d ":" > $dir/out & | ||
| - | ||
| - sleep 1s | ||
| - pidofvcpu=`echo "info cpus" | ncat -U $unixpath | grep thread_id | cut -f 3 -d "=" | tr -d "\r"` | ||
| - taskset -p -c $1 $pidofvcpu >/dev/null | ||
| - echo "cont" | ncat -U $unixpath >/dev/null | ||
| - wait | ||
| - | ||
| - if [ ! -f $dir/out ]; then | ||
| - die running $TSCDEADLINE_LATENCY failed | ||
| - fi | ||
| - | ||
| - tmp=$(wc -l $dir/out | awk '{ print $1 }') | ||
| - if [ $tmp -eq 0 ]; then | ||
| - die running $TSCDEADLINE_LATENCY failed | ||
| - fi | ||
| - | ||
| - A=0 | ||
| - while read l; do | ||
| - A=$(($A+$l)) | ||
| - done < $dir/out | ||
| - | ||
| - lines=`wc -l $dir/out | cut -f 1 -d " "` | ||
| - ans=$(($A/$lines)) | ||
| - echo $i: $ans | ||
| - done | ||
| -} | ||
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| start() { | ||
| setup_kvm_mod_low_latency | ||
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| disable_ksm | ||
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| - # If CPU model has changed, clean the cache | ||
| - if [ -f $CACHE_CPU_FILE ]; then | ||
| - curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq` | ||
| - if [ -z "$curmodel" ]; then | ||
| - die failed to read CPU model | ||
| - fi | ||
| - | ||
| - genmodel=`cat $CACHE_CPU_FILE` | ||
| - | ||
| - if [ "$curmodel" != "$genmodel" ]; then | ||
| - rm -f $CACHE_VALUE_FILE | ||
| - rm -f $CACHE_CPU_FILE | ||
| - fi | ||
| - fi | ||
| - | ||
| - # If the cache is empty, find the best lapic_timer_advance_ns value | ||
| - # and cache it | ||
| - | ||
| - if [ ! -f $KVM_LAPIC_FILE ]; then | ||
| - die $KVM_LAPIC_FILE not found | ||
| - fi | ||
| - | ||
| - if [ ! -f $CACHE_VALUE_FILE ]; then | ||
| - if [ -f "$TSCDEADLINE_LATENCY" ]; then | ||
| - tempdir=`mktemp -d` | ||
| - isolatedcpu=`echo "$TUNED_isolated_cores_expanded" | cut -f 1 -d ","` | ||
| - run_tsc_deadline_latency $isolatedcpu > $tempdir/lat.out | ||
| - if ! ./find-lapictscdeadline-optimal.sh $tempdir/lat.out > $tempdir/opt.out; then | ||
| - die could not find optimal latency | ||
| - fi | ||
| - echo `cat $tempdir/opt.out | cut -f 2 -d ":"` > $CACHE_VALUE_FILE | ||
| - curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq` | ||
| - echo "$curmodel" > $CACHE_CPU_FILE | ||
| - fi | ||
| - fi | ||
| - | ||
| - if [ -f $CACHE_VALUE_FILE ]; then | ||
| - echo `cat $CACHE_VALUE_FILE` > $KVM_LAPIC_FILE | ||
| - fi | ||
| systemctl start rt-entsk | ||
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| if [ -f $KTIMER_LOCKLESS_FILE ]; then | ||
| diff --git a/tuned.spec b/tuned.spec | ||
| index a9867103..4e148fb1 100644 | ||
| --- a/tuned.spec | ||
| +++ b/tuned.spec | ||
| @@ -201,11 +201,6 @@ Requires: %{name} = %{version} | ||
| Requires: %{name}-profiles-realtime = %{version} | ||
| Requires: tuna | ||
| Requires: nmap-ncat | ||
| -%if 0%{?rhel} == 7 | ||
| -Requires: qemu-kvm-tools-rhev | ||
| -%else | ||
| -Recommends: tuned-profiles-nfv-host-bin | ||
| -%endif | ||
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| %description profiles-nfv-host | ||
| Additional tuned profile(s) targeted to Network Function Virtualization (NFV) host. |