Bug 2173740

Summary: [RFE] RFE to include a sap-hana-kvm-guest tuned profile into the tuned-profiles-sap-hana RPM package
Product: Red Hat Enterprise Linux 8 Reporter: Nils Koenig <nkoenig>
Component: tunedAssignee: Jaroslav Škarvada <jskarvad>
Status: ASSIGNED --- QA Contact: Robin Hack <rhack>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.8CC: aarnold, cbrune, djdumas, jeder, jmario, jskarvad, mtessun, nkoenig
Target Milestone: rcKeywords: FutureFeature, Patch, TestCaseNotNeeded, Triaged, Upstream
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Hardware: x86_64   
OS: Linux   
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Description Nils Koenig 2023-02-27 20:33:36 UTC 
Description of problem:

KVM based virtualization require specific settings. Currently we describe the profile in our Best Practices Guide and users have to copy and paste it.

We think it would make totally sense to add it to the tuned-profiles-sap-hana RPM package since there is already a package that is shipped specifically for SAP HANA (which the sap-hana-kvm-guest profile actually includes).

Target version and exact parameter set is TBD but let's get the discussion and (hopefully) approval through this BZ going.
Comment 2 Nils Koenig 2023-02-27 20:42:36 UTC 
This is the content of /usr/lib/tuned/sap-hana-kvm-guest/haltpoll.sh (mode: 0744)

        #!/bin/bash

        if [ "$1" == "start" ]; then
            modprobe cpuidle-haltpoll force
        fi


This is the content of /usr/lib/tuned/sap-hana-kvm-guest/tuned.conf
        #
        # tuned configuration
        #
        [main]
        summary=Optimize for running SAP HANA on KVM inside a virtual guest
        include=sap-hana

        [haltpoll]
        type=script
        script=${i:PROFILE_DIR}/haltpoll.sh

        [sysfs]
        /sys/devices/system/clocksource/clocksource0/current_clocksource=tsc
        /sys/module/haltpoll/parameters/guest_halt_poll_ns=2400000
        /sys/module/haltpoll/parameters/guest_halt_poll_grow_start=2400000

# This are the parameters that we need to clarify if we need to change them or the can stay on default/what sap-hana profile sets
#        [sysctl]
#        kernel.sched_latency_ns=12000000
#        kernel.sched_migration_cost_ns=500000
#        kernel.sched_min_granularity_ns=12000000
#        kernel.sched_wakeup_granularity_ns=15000000

        [bootloader]
        cmdline_saphana=skew_tick=1
Comment 4 Jaroslav Škarvada 2023-06-14 08:53:23 UTC 
Upstream PR:
https://github.com/redhat-performance/tuned/pull/529/