03449e60f9
KSM is enabled by default when the qemu-kvm-common-rhev package is installed. We don't want KSM to run in KVM-RT nor cpu-partitioning hosts, as it can cause spikes or packet drops. This series disables KSM in those profiles when they are activated. Likewise, we re-enable KSM when the profile is de-activated in case it's enabled by default in systemd. Luiz Capitulino (3): profiles: functions: add functions to disable/enable KSM realtime-virtual-host: disable KSM cpu-partitioning: disable KSM profiles/cpu-partitioning/script.sh | 2 ++ profiles/functions | 37 ++++++++++++++++++++++++++++++++ profiles/realtime-virtual-host/script.sh | 3 +++ 3 files changed, 42 insertions(+) -- 2.9.5 Return-Path: lcapitulino@redhat.com Received: from zmta04.collab.prod.int.phx2.redhat.com (LHLO zmta04.collab.prod.int.phx2.redhat.com) (10.5.81.11) by zmail22.collab.prod.int.phx2.redhat.com with LMTP; Tue, 3 Oct 2017 15:54:02 -0400 (EDT) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by zmta04.collab.prod.int.phx2.redhat.com (Postfix) with ESMTP id 46F2FD0310 for <jskarvad@mail.corp.redhat.com>; Tue, 3 Oct 2017 15:54:02 -0400 (EDT) Received: by smtp.corp.redhat.com (Postfix) id 3FBC860F82; Tue, 3 Oct 2017 19:54:02 +0000 (UTC) Delivered-To: jskarvad@redhat.com Received: from localhost (ovpn-117-159.phx2.redhat.com [10.3.117.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3A51A60F81; Tue, 3 Oct 2017 19:53:59 +0000 (UTC) From: Luiz Capitulino <lcapitulino@redhat.com> To: jskarvad@redhat.com Cc: kvm-rt@redhat.com Subject: [PATCH 1/3] profiles: functions: add functions to disable/enable KSM Date: Tue, 3 Oct 2017 15:53:50 -0400 Message-Id: <20171003195352.22910-2-lcapitulino@redhat.com> In-Reply-To: <20171003195352.22910-1-lcapitulino@redhat.com> References: <20171003195352.22910-1-lcapitulino@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 They will be used by the next commits. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
69 lines
2.1 KiB
Bash
Executable file
69 lines
2.1 KiB
Bash
Executable file
#!/bin/sh
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. /usr/lib/tuned/functions
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ltanfile=/sys/module/kvm/parameters/lapic_timer_advance_ns
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start() {
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python /usr/libexec/tuned/defirqaffinity.py "remove" "$TUNED_isolated_cores_expanded" &&
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retval = "$?"
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if [ ! $retval -eq 0 ]; then
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return $retval
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fi
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setup_kvm_mod_low_latency
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if [ -f lapic_timer_adv_ns.cpumodel ]; then
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curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq`
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genmodel=`cat lapic_timer_adv_ns.cpumodel`
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if [ "$curmodel" != "$genmodel" ]; then
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rm -f lapic_timer_adv_ns
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rm -f lapic_timer_adv_ns.cpumodel
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fi
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fi
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if [ -f $ltanfile -a ! -f ./lapic_timer_adv_ns ]; then
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if [ -f /usr/share/qemu-kvm/tscdeadline_latency.flat ]; then
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tempdir=`mktemp -d`
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isolatedcpu=`echo "$TUNED_isolated_cores_expanded" | cut -f 1 -d ","`
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sh ./run-tscdeadline-latency.sh $isolatedcpu > $tempdir/lat.out
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sh ./find-lapictscdeadline-optimal.sh $tempdir/lat.out > $tempdir/opt.out
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if [ $? -eq 0 ]; then
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echo `cat $tempdir/opt.out | cut -f 2 -d ":"` > ./lapic_timer_adv_ns
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curmodel=`cat /proc/cpuinfo | grep "model name" | cut -f 2 -d ":" | uniq`
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echo "$curmodel" > lapic_timer_adv_ns.cpumodel
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fi
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fi
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fi
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if [ -f $ltanfile -a -f ./lapic_timer_adv_ns ]; then
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echo `cat ./lapic_timer_adv_ns` > $ltanfile
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fi
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disable_ksm
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return $retval
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}
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stop() {
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[ "$1" = "full_rollback" ] && teardown_kvm_mod_low_latency
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python /usr/libexec/tuned/defirqaffinity.py "add" "$TUNED_isolated_cores_expanded"
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enable_ksm
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return "$?"
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}
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verify() {
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python /usr/libexec/tuned/defirqaffinity.py "verify" "$TUNED_isolated_cores_expanded"
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retval = "$?"
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if [ $retval -eq 0 -a -f /sys/module/kvm/parameters/kvmclock_periodic_sync ]; then
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retval = `cat /sys/module/kvm/parameters/kvmclock_periodic_sync`
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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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retval = `cat /sys/module/kvm_intel/parameters/ple_gap`
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fi
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return $retval
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}
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process $@
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