Disabling CPU management
This is going to be a function of your hardware setup.
Please provide the server make/model and Linux distribution/version and kernel.
The process to maximize server performance varies greatly depending on what you have available to you...
For instance:
- Red Hat 6 systems have the tuned-adm framework which disables the CPU governors. (Also see this graphic.)
- HP ProLiant servers (and others) have a specific tuning guide and steps for low-latency and performance-optimized setups.
- Most hardware vendors have specific BIOS settings that can help (disabling C-States and P-States - also frequency-scaling).
So please, provide more context about what you're looking for.
Check the matrix listed in this answer for some general information on the RHEL approach.
Edit: From your kernel string, this appears to be a Red Hat-like RPM-based system.
I would suggest downloading the tuned-adm utilities and changing your system's performance profile to accomplish what you want.
In your case:
yum install tuned tuned-utils
tuned-adm profile latency-performance
or maybe:
tuned-adm profile enterprise storage
Either will disable the CPU governor.
The system settings and profiles are arranged according to the schedule below:
Related videos on Youtube
Tiffany Walker
Updated on September 18, 2022Comments
-
Tiffany Walker over 1 year
If I add the following
processor.max_cstate=0
to the kernel command line for boot up, does that disable all CPU power management and throttling?The link talks of Change CPU governor from 'ondemand' to 'performance' for all CPUs/cores and disabling kondemand from kernel.
Server is for web hosting
UPDATES:
2.6.32-379.1.1.lve1.1.7.6.el6.x86_64 #1 SMP Sat Aug 4 09:56:37 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux
.
# dmidecode 2.11 SMBIOS 2.6 present. 74 structures occupying 2878 bytes. Table at 0x0009F000. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: American Megatrends Inc. Version: 1.0c Release Date: 05/27/2010 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 4096 kB Characteristics: ISA is supported PCI is supported PNP is supported BIOS is upgradeable BIOS shadowing is allowed ESCD support is available Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 kB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported LS-120 boot is supported ATAPI Zip drive boot is supported BIOS boot specification is supported Targeted content distribution is supported BIOS Revision: 8.16 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: Supermicro Product Name: X8SIE Version: 0123456789 Serial Number: 0123456789 UUID: 49434D53-0200-9033-2500-33902500D52C Wake-up Type: Power Switch SKU Number: To Be Filled By O.E.M. Family: To Be Filled By O.E.M. Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: Supermicro Product Name: X8SIE Version: 0123456789 Serial Number: VM11S61561 Asset Tag: To Be Filled By O.E.M. Features: Board is a hosting board Board is replaceable Location In Chassis: To Be Filled By O.E.M. Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0 Handle 0x0003, DMI type 3, 21 bytes Chassis Information Manufacturer: Supermicro Type: Sealed-case PC Lock: Not Present Version: 0123456789 Serial Number: 0123456789 Asset Tag: To Be Filled By O.E.M. Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Height: Unspecified Number Of Power Cords: 1 Contained Elements: 0
-
MDMarra over 11 yearsWhat's that link have to do with anything? If you expect people from here to follow a link to EE, you should give it some context.
-
Tiffany Walker over 11 yearsExplained the link some.
-
-
Tiffany Walker over 11 yearsPosted information! :)
-
ewwhite over 11 years@TiffanyWalker Still looking for the OS version.
-
Tiffany Walker over 11 yearsDone. 2.6.32-379.1.1.lve1.1.7.6.el6.x86_64 #1 SMP Sat Aug 4 09:56:37 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux
-
ewwhite over 11 years@TiffanyWalker You haven't given the specific OS distribution or a real explanation of why you need the CPU management to be disabled. Can you provide some context on what you're trying to do? Either way, I'd updated my answer with the commands to modify the governors on a modern RHEL-like system.
-
Tiffany Walker over 11 yearsIt's CentOS just with a modded kernel. The system is acting poor on performance with no real load so trying out CPU related issues.
-
ewwhite over 11 years@TiffanyWalker Well, just run
tuned-adm profile <profile-name>
for the appropriate profile, and you're done. -
ewwhite over 11 years@TiffanyWalker I don't know. You haven't explained what the server's purpose or application is!
-
Tiffany Walker over 11 yearsIt's a web based hosting server.
-
ewwhite over 11 yearsTry throughput-performance for now.