Bug 1015675

Summary: Add support to tuned for setting MSR_IA32_ENERGY_PERF_BIAS Intel CPU MSR
Product: Red Hat Enterprise Linux 7 Reporter: Jeremy Eder <jeder>
Component: tunedAssignee: Jaroslav Škarvada <jskarvad>
Status: CLOSED CURRENTRELEASE QA Contact: Branislav Blaškovič <bblaskov>
Severity: high Docs Contact:
Priority: unspecified    
Version: 7.0CC: bblaskov, jeder, jskarvad
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tuned-2.3.0-1.el7 Doc Type: Bug Fix
Doc Text:
Cause: Newer Intel CPUs have MSR tuning knob called MSR_IA32_ENERGY_PERF_BIAS which can be used for controlling bias to performance or powersave. Previously, Tuned didn't know how to control the MSR_IA32_ENERGY_PERF_BIAS. Consequence: The MSR_IA32_ENERGY_PERF_BIAS wasn't modified in the Tuned profiles, which could lead to negative impacts on performance / powersave. Fix: The code for controlling the MSR_IA32_ENERGY_PERF_BIAS was added into Tuned. Result: If kernel-tools package is installed, Tuned now modifies the MSR_IA32_ENERGY_PERF_BIAS according to selected profile.
 Story Points: ---
Clone Of:
: 1027250 (view as bug list) Environment:
Last Closed: 2014-06-13 09:35:26 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1027250    

Comment 2 Jaroslav Škarvada 2013-10-16 11:47:23 UTC 
Using kernel-tools - we are using existing tools rather then rewriting their functionality.

Using:
'normal' policy for balanced profile
'performance' policy for throughput-performance and throughput-latency profiles
'powersave' policy for powersave profile
Comment 3 Jaroslav Škarvada 2013-10-16 11:50:01 UTC 
> 'performance' policy for throughput-performance and throughput-latency
> profiles
'performance' policy for throughput-performance and latency-performance profiles
Comment 5 Jaroslav Škarvada 2013-10-23 08:59:07 UTC 
Upstream commit adding this feature:
https://git.fedorahosted.org/cgit/tuned.git/commit/?id=59e259a3ceb3d6e943c3d16e71be996047431459
Comment 7 Branislav Blaškovič 2014-01-06 14:57:51 UTC 
New testcase created (attached)

Testing with tuned-2.3.0-4.el7.noarch

Log:
cpu3: 0x0000000000000006
:: [ 15:52:25 ] ::  balanced profile - should have normal
:: [   PASS   ] :: Running 'tuned-adm profile balanced' (Expected 0, got 0)
cpu0: 0x0000000000000006
cpu1: 0x0000000000000006
cpu2: 0x0000000000000006
cpu3: 0x0000000000000006
:: [ 15:52:28 ] :: [ INFO    ] :: rlRun: command = '/bin/x86_energy_perf_policy -r'; exitcode = 0; expected = 0
:: [   PASS   ] :: Running '/bin/x86_energy_perf_policy -r' (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.b81iA7MgJB' should contain '0x0000000000000006'

:: [ 15:52:29 ] ::  latency-performance profile - should have performance
:: [   PASS   ] :: Running 'tuned-adm profile latency-performance' (Expected 0, got 0)
cpu0: 0x0000000000000000
cpu1: 0x0000000000000000
cpu2: 0x0000000000000000
cpu3: 0x0000000000000000
:: [ 15:52:32 ] :: [ INFO    ] :: rlRun: command = '/bin/x86_energy_perf_policy -r'; exitcode = 0; expected = 0
:: [   PASS   ] :: Running '/bin/x86_energy_perf_policy -r' (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.1kQ9hqUbKB' should contain '0x0000000000000000'

:: [ 15:52:33 ] ::  throughput-performance profile - should have performance
:: [   PASS   ] :: Running 'tuned-adm profile throughput-performance' (Expected 0, got 0)
cpu0: 0x0000000000000000
cpu1: 0x0000000000000000
cpu2: 0x0000000000000000
cpu3: 0x0000000000000000
:: [ 15:52:35 ] :: [ INFO    ] :: rlRun: command = '/bin/x86_energy_perf_policy -r'; exitcode = 0; expected = 0
:: [   PASS   ] :: Running '/bin/x86_energy_perf_policy -r' (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.Kbl2pRdK14' should contain '0x0000000000000000'

:: [ 15:52:36 ] ::  powersave profile - should have powersave
:: [   PASS   ] :: Running 'tuned-adm profile powersave' (Expected 0, got 0)
cpu0: 0x000000000000000f
cpu1: 0x000000000000000f
cpu2: 0x000000000000000f
cpu3: 0x000000000000000f
:: [ 15:52:39 ] :: [ INFO    ] :: rlRun: command = '/bin/x86_energy_perf_policy -r'; exitcode = 0; expected = 0
:: [   PASS   ] :: Running '/bin/x86_energy_perf_policy -r' (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.jPwlHjZB3F' should contain '0x000000000000000f'
Comment 8 Ludek Smid 2014-06-13 09:35:26 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

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