Decreasing voltage for CPU core

I have decreased CPU core voltage for my P4 2,8GHz from default 1,525V to 1,5V which helps me to decrease CPU full-load temp. from 61-62°C to 58-59°C. System is styl rocky stable. Is there something negative/dangerous on decreasing CPU core voltage?
Thanx
My system:
Gigabyte GA-8IK110 i875P
Intel P4 2.80 GHz (800MHz FSB), HT enabled
2 x 512 MB TwinMOS PC3200 DDRAM 400 MHz CL2.5 dual channel
MSI G4 Ti4600 VTD 128MB (MSI-8872) (detonatorXP 44.03)
Creative SB Audigy 2 (latest drivers 05/2003)
Creative Inspire 5.1 5300 speakers
80 GB Seagate Baracuda IV 7200 rpm
32x CDROM TEAC
350W PSU Enermax EG365P-VE
19" Philips Briliance
WinXP SP1
DirectX 9

Ther's no harm in doing that.

Similar Messages

K8NGM2-FID CPU core voltage Fluctuations and instabilities-- Bad caps!!?

I Have K8NGM2-FID bought 6 months ago and started having stability issues since last month.
Here is my configuration
K8NGM2-FID ver 2.0 Bios 3.73 now, used to be 3.5, experimented both, but did not help
Onboard video, Onboard Lan, firewire
Memory : 512 x 2 Corsair DDR400 in dual channel mode at 2.65v 64MB to Video
CPU: AMD64 X2 3800+
HDD WD 160GB SATA150
Winfast TV2000 Expert Tv Tuner
Drivers, tried many version ( currently using latest Nvidia Video, MB drivers)
Now, the description of the problem.
System suddenly hangs with or without load, intermittenly. Nothing to do what we are working on. Even when System is idle.
Hangs means, it could happend two ways,
1. simply it would not respond, screen simply freezes,
2. sometimes, you simply see horizantal lines on monitor( Typically happens when cpu core voltage drops below it can handle). I know this because
I am using RMClock on my Turion laptop, and when we try to find lowest stable voltage we see this behaviour.
Now, some other observation, from the day one CPU core voltage has been fluctuating a lot. Used to fluctuate anywhere between 1.37v to 1.304v( at default 1.35v). But still has been stable. Ran 24hour prime95, so no problems.
Recently I am seeing voltage fluctuations is more, as low as 1.28v to 1.39v at default 1.35v, so I tried RMCLock and raised the voltage to 1.4v, but it seems that did not help much.
Now, As per the MSI PCALert4 voltage is changing anywhere from 1.28v to 1.38v, but also I get core voltage field empty( that is right no CPU core voltage shown) and alarm sounds. It seems, CPU does not get voltage at all and gets very low voltage for a second or so.
Things I tried, Changed the powersupply, changed the Memory, but no use. I am lucky enough to have exact same configuration I built for a friend. So, I checked voltages on his PC and I do not see this behaviour.
Now, I ran out of options.... any idea anyone had similar problem, and if they solved?
Now, here are PCAlert 4 images
http://img171.imageshack.us/my.php?image=128vatdef135sp5.jpg
http://img256.imageshack.us/my.php?image=novoltageif5.jpg
http://img406.imageshack.us/my.php?image=132vredbi3.jpg
Also, another weird behaviour with Bios, even when I change setting in bios, they did not take effect, even loading default does not help, so I have to press CMOS reset button.
Any help will be appreciated.
Thanks

Thanks for the quick reply.
First to clarify, these things has been developed a monrh ago only. It has been fine for more than 5 months.
1). Yes Memory is insalled in closest DIMM sockets to CPU,
2). I think you mean mem voltage. The memory I have is Corsair Value series and it even runs fine DDR400 at 2.55v, but I bumped it to 2.65v and also tried 2.75v ( 2.65v is typical I have been using with this MB).
3). Memory has been tested with Memtest for 24 hours and ran Dual Prime95 for 24 hours when system is assembled.
Also swapped from another PC I built for my friend with same components( same corsair value series memory) Also tested my memory on his PC, no probs. BTW I also tested my memory at 333, freezing even happens even at that speed.
4). PSU has nothing to do, because I have been monitoring all PSU rails with SPeedFan none of of the rail voltages moved at all. I even monitored with Digital Multimeter to ensure. Anyways I even tried 3 psus, one ANtec 350W smart power supply, ThemalTake 420W, Ultra 400 Watts. All have more than enough juice to power this setup. (onboard Graphics card).
5). Yes, freezing happens in simply desktop too. Nothing to do with CPU load or graphics load. It could happen even when just idling.
6). I use stock CPU cooler in Antec 1650B case with 120MM Fan running in the back( approx 50cfm) and CPU temp never exceeded 47c and MB temp typically around 28c and NB temp around 50-60c using a digital probe and 55-70c using Nvidia Monitor based on load vs no load.
7). As per Dual core patches, I applied AMD Dual Core optimizer quite a while ago. As per the MS Patch, No I have not applied( But I doubt it helps because it has been stable without that for all these months). I may try that.
Now, what I am trying, I disabled CNQ, and logging Core voltage fluctuation with speedfan( no monitoring).
as of yesterday night the core voltage was varying from 1.28v to 1.39v( I think that is insane 110mv fluctuation in CPU core voltage!!?) at default CPU voltage of 1.35v. BTW it has nothing to with CPU load, all these logs generated when it was idle. I remember fluctuation even when MB was new, but lowest I observed was 1.304v.
SOmehow, I suspect VRM is pretty bad on this MB.
Anyways, see the response and let me know if you think I am missing somethings. Appreciate your help.

Core Voltage for 5820k on X99s Gaming 7

Hi there, I am new to the forums and MSI..
This is my first msi board, so far so good, I have the x99s Gaming 7 with i7-5820k, 16 GB 4x4 of Corsair Vengeance 2800 with 1000w EVGA P2 and NH-D15 cooler, 250GB Samsung 840 SSD and my video card is crap but I plan on getting gtx 970/980...
I was able to get 4.5 GHZ all I had to do was increase multiplier to 45 and core voltage to 1.35v
Here is my question...
I plan to run 24/7 and happy with 4.0 GHZ OC..
I left everything on auto and change my cpu vcore voltage to 1.14v..
I have my ram at 2666Mhz..
My idle temps are 38C-41c..with load at max of 63C after running for a few hours with aida64
I am curious to see what others have used for there vcore voltage for 4.0 Ghz OC
Any way to use my ram at 2800MHZ without using XMP?
Is there a way to have a variable vcore voltage, so that will use little power but ramp up when under load?
This is my first attempt at overclocking
PS what do you guys have your CPU fans set to I am using variable speeds starting with 50%@ 40C, can you give some recommendations?
Thanks

First, Welcome to overclocking.
Quote from: gm.ambrosia on 16-February-15, 10:11:32
My idle temps are 38C-41c..with load at max of 63C after running for a few hours with aida64
What is the room/ambiant temperature
This CPU max Tcase is 66.8c, you may want to keep it below this except maybe for short time stress tests.
Quote from: gm.ambrosia
I am curious to see what others have used for there vcore voltage for 4.0 Ghz OC
For my CPU(different than yours) I have increased vcore 0.01v above stock.
I suggest you first see what cores VID is at default, set BIOS vcore until you get the same VID and take it from there. It may be stable with less or require a little more, every CPU is different.
Besode voltages CPU frequency ay be throttled if CPU power consumption reached it's limit. There are options in CPU Features to change power/current limits.
Everyone make their own definition of stable, so it's up to you what tests you want it to pass, I don't know AIDA's stress, but I believe Prime95 (v28.5 or above) would be much more stressful, and should not be a problem with your cooler/voltage.
Quote from: gm.ambrosia
Any way to use my ram at 2800MHZ without using XMP?
Sure, set DDR at the level you wish, and set timings and voltage manually according to specs.
The question is why not use XMP, uless you want it over 2800, and even then BIOS will scale some settings you wouldn't know to change manually according to its logic.
Quote from: gm.ambrosia
Is there a way to have a variable vcore voltage, so that will use little power but ramp up when under load?
By default, that's how it works, vcore increases according to load, if not there are options in BIOS to change it. Set CPU Core Voltage Mode to adaptive if it is set to override by default.
I like HWiNFO for monitoring, it's free.

Pinning physical CPU cores for VMs

Hi all,
Let's assume we have OVM Server pool on two-node Dell R900 Hosts, FC switches and SAN. One server is acting as the Server Pool Master and Utilty Server, as well as the OVM Server. The other Dell R900 server acts as the OVM Server. Both Dell servers have two quad-core processors and are configured as active/passive. VMs are meant to be on SAN but will need memory and CPU from the phyisical servers in two-node Dell r900 hosts.
Is it possible to specify cores for the first VM as cpus='0,1,2,3' and the second VM as cpus='4,5,6,7' in both vm.cfg to avoid the situation when they will both use the same first four cores on the same phyisical server? I know it is more expensive lto use all 8 cores but is inevitable since the two applications in two VMs will need a lot of processing power.
What would be your recommendation how to configure vm.cfg and cpus parameter for two different VMs?
Cheers,
Andrei

I am in a very similar position where we have 2 CPU license for Oracle DB. I would like to use this to run two separate databases on separate OS instances. One will be an OBIEE database and the other will be an Oracle Retail database. I'd like to assign both guests CPU 0,1,2,3 and let them share the CPU resources but I don't know if you can do that with "Hard Partitioning".
Interesting side note - since the servers I bought are running the Intel X5680 CPU's they have the new style Nehalem hyperthreading. This means that on my 2 socket server I have a total of 12 CPU cores (six core CPU's) and each core has two threads. This shows up as 24 CPU's on the Oracle VM server. If I read the licensing correctly I can run my 2 CPU's on 4 cores which means I should be able to assign 8 CPU instances and meet the database CPU licencing requirements - RIGHT?! - thoughts?

How to calcuate how much cpu/cores needed for an amalgamation of databases on a single instance

Hi all, We have been given a project of producing a high level hardware spec for a new oracle linux server that would be an amalgamation of our current 5 windows servers all running Oracle 11203 Windows 2008 r2. All our windows boxes are Intel dual core with 12 cores each. My question is how to measure how much cpu is our current each oracle database is using to determine the min cpu/cores required for the new linux box? Hope i make sense. Thanks!

Snap Id
Snap Time
Sessions
Cursors/Session
Begin Snap:
7967
16-Mar-13 00:00:19
120
3.4
End Snap:
7983
16-Mar-13 16:00:08
119
3.6
Elapsed:
959.81 (mins)
DB Time:
11,565.82 (mins)
Load Profile
Per Second
Per Transaction
Per Exec
Per Call
DB Time(s):
12.1
0.6
0.05
0.09
DB CPU(s):
2.5
0.1
0.01
0.02
Top 5 Timed Foreground Events
Event
Waits
Time(s)
Avg wait (ms)
% DB time
Wait Class
DB CPU
141,781
20.43
Host CPU (CPUs: 40 Cores: 20 Sockets: 2)
Load Average Begin
Load Average End
%User
%System
%WIO
%Idle
10.05
16.90
6.4
2.3
0.0
90.6
Instance CPU
%Total CPU
%Busy CPU
%DB time waiting for CPU (Resource Manager)
6.9
73.7
0.0
Operating System Statistics
*TIME statistic values are diffed. All others display actual values. End Value is displayed if different
ordered by statistic type (CPU Use, Virtual Memory, Hardware Config), Name
Statistic
Value
End Value
BUSY_TIME
21,616,011
IDLE_TIME
208,748,575
IOWAIT_TIME
20,115
NICE_TIME
7
SYS_TIME
5,241,553
USER_TIME
14,766,063
LOAD
10
17
RSRC_MGR_CPU_WAIT_TIME
3,348
VM_IN_BYTES
2,126,163,628,032
VM_OUT_BYTES
-3,086,139,181,056
PHYSICAL_MEMORY_BYTES
202,835,083,264
NUM_CPUS
40
NUM_CPU_CORES
20
NUM_CPU_SOCKETS
2
Hope that above excerpts from AWR reports can tell how much cpu is consuming each database , because for each database you will run awr report and then compare them .

Sql server with a license for 2 cores on cpu with 8 cores

hi guys, how are you doing
i have a question for the msdn experts
can we run an sql server 2012 with a license for 2 cores on a cpu of 8 cores (from a technical point and legal )
maybe by limiting the number of cores used by sql server
it will run on the latest windows server
i'm looking for your answers
thanks

This is forum for technical question,all licensing question must be directed to Licensing expert.
You can call 1-800-426-9400, Monday through Friday, 6:00 A.M. to 6:00 P.M. (Pacific Time) to speak directly to a Microsoft licensing specialist. You can also visit the following site for more information and support on licensing issues:
http://www.microsoft.com/licensing/mla/default.aspx
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers
My TechNet Wiki Articles

Having trouble with voltage alarm in core center

I hadn't used this comp for about a year, just put it back together and added the kingston ram to it that a buddy gave to me. Just found Core Center online and installed it. The problem i'm having is that the alarm is going crazy. Don't have alot of experience overclocking, and i'm not actaually trying to at all. I've been having programs close and games freeze up because of overheating. This is what I see when I look at the core center.
on the left
1.39 v
Vcore
2.72-82 v (flashing red)
3.3V
4.97 v
+5v
11.84-90v
+12V
If I open the tab, the FBS says 200mhz and is flashing blue to black
doesn't look like i'm having any problems with cpu temp. 35 'C
Any help would be appreciated.
Thanks

Quote from: kourosh on 19-November-08, 01:58:25
do you know how to enter into bios if so then click on default save and exit then see what happens, somehow it looks the voltage for memory has been set 2.7 or 2.8 volt which is too high it should be 1.8 or 2.5 volt
Yea its at 2.5 i beleive. I reset everything to default, and it has been since i put everything back together. Before i had core center installed it was crashing guild wars, and wow consistantly because of overheating. I'll unistall core center and get a monitering app instead.

Minimum Voltage for how long?

Minimum Voltage for how long b/4 it f's something up?
I just found that my V-core is only 1.28v. And it has to be due to the 12 volt only being 12A I hadn't noticed that this was bad until I ran Sandra. I can't get it over that mark even by cranking it up in the bios. What should the amps be? I know I have read all the best power supplies posts but I gather that the 12v is for the processor so that should be the highest. But any damage at my current voltage? I have been running it for a week.

did you plug in both mobo plugs. the small 4 pin is also a 12v supply.
if the psu had two main leads you spread out the load on both leads to your drives fans etc.
look on the back of you psu(or top there should be a sticker with max loads etc what does that say, while your at it, check to make sure red 115V/220V swithch is is right spot ie..115 vfor us
the 12A was on label? under what? input current
I have a compusa 600W precision power, which i am sure is a cheapo unit
but it has 30A +5v..25A+3.3v..28A..+12v...6A-12v...6A -12v..2A+5vsb
+3,+5+12 max combined load is 570W input current 11A for 115v
12a is way low I think the cpu is @9amps by its self.
you have 3 hd and 2 dvd/cd's
...I would run to the store and get a new psu pronto.
I have read underpowering can damage also, but not as bad as overpowering.
But broke is broke

Multisim 11 only uses one CPU core during simulation

Hi,
Just recently I've been using MultiSim again, v11 if that matters, and simulating goes slow, to my opinion that is.
Now there are two things that I've noticed:
- Multisim only uses one of two CPU cores during simulation, not both;
- I've enabled CPU throttle (AMD's Cool'n'Quiet) but corespeed remains very low even though Multisim needs CPU power while simulating.
The simulating of a NE555-based LED-flash circuit requires about 28 seconds to get to 100ms in the simulation. Now if I can get the CPU to throttle up, by for example having Prime95 stress one of the two cores, then the simulation only requires 12 seconds to get to 100ms.
So here are my two questions:
1. Is Multisim 11 capable of using more than one CPU core while simulating? If yes, how can I get it to use more than one?
2. Probably not the right forum to ask, but is there a way to force Windows 7 Ultimate x64 to throttle up the CPU when Multisim starts simulating? Since Multisim does not seem to stress the only core it uses enough to throttle it up. Using Prime95 on one core does trigger a throttle up.
With regards,
Bart Grefte
Relevant specs:
Windows 7 Ultimate x64
Multisim v11
AMD A4-3400
16GB RAM

Completely forgot this topic....
Is there a good reason why there is no multicore support? Multisim can certainly use it for simulating.
As for the CPU throttling, I found a batch that can increase/decrease the "minimum processor state"-setting and it works immediately, no reboot required.
@echo off
powercfg.exe -getactivescheme > "%userprofile%\appdata\~apo.tmp"
set /p v_currentscheme= <"%userprofile%\appdata\~apo.tmp"
set v_currentscheme=%v_currentscheme:~24,36%
del "%userprofile%\appdata\~apo.tmp"
powercfg -setacvalueindex %v_currentscheme% 54533251-82be-4824-96c1-47b60b740d00 893dee8e-2bef-41e0-89c6-b55d0929964c %1
powercfg -setdcvalueindex %v_currentscheme% 54533251-82be-4824-96c1-47b60b740d00 893dee8e-2bef-41e0-89c6-b55d0929964c %1
powercfg -s %v_currentscheme%
exit
Usage is simple:
Start -> run -> c:\pathtobatch.bat 100
for "minimum processor state"-setting at 100%
Start -> run -> c:\pathtobatch.bat 5
for "minimum processor state"-setting at 5%
Please note that "set v_currentscheme=%v_currentscheme:~24,36%" is not the same for every language. The original batch had "set v_currentscheme=%v_currentscheme:~19,36%" (most likely for the English version of Windows 7), but since my Windows install is in Dutch, I had to change it in order for it to work.
Running the batch with @echo off removed will show why.

HELP! - Voltages for Overclocking Q9450 on the MSI P7N Diamond (780i chipset)

Hey. I fully understand the settings as far as frequencies go, but am a total voltage newb. No matter what I do I cant seem to get a stable vista load up with my voltage settings.
Please help me by providing suggested voltage settings for my hardware.
CPU - Intel Core2Quad Q9450
RAM - 6 gigs of DDR2-800 rated at 2.1V
VIDEO - Dual Nvidia Geforce 8800GT's in SLI
MOBO - MSI P7N Diamond, based off the Nvidia Nforce 780i SLI chipset
My cooling is sufficient, and I have the BIOS version 1.2
I also turned off all of the overclocking not friendly functions, example: spread spectrum, and DOT, ETC....
I am trying to run my CPU at 3.2 GHZ (400 mhz before multiplier)
my settings I want are (as shown in the P7N bios)
System Clock Mode - Manual
FSB clock - 1600
DRAM clock - 800
Please help me by providing the proper voltages for my setup
Everything I need is marked by "???"
CPU Voltage - ???
DRAM Voltage - (already have, its 2.1)
NB voltage - ???
SB voltage - ???
NB Memory reference voltage - ???
DIMM memory reference voltage - ???
Memory terminator voltage - ???
CPU GTL reference voltage - ???
NB GTL reference voltage - ???
FSB terminator voltage - ???
SB sleep mode voltage - ???
PCI Expander PLL voltage - ???
For the sake of you not typing too much, if you specify voltages, any that you do not specify will be assumed to be left at [AUTO]
PLEASE help me by providing some voltages for me, as I have absolutely no clue what to put for them. If you have any questions about my hardware feel free to ask, and any help is GREATLY APPRECIATED

Quote from: nihilkrist on 08-October-08, 08:03:22
adjusting gtl ref. voltages isn't very difficult, but it is probably best to learn the basics first.
So, basically, increase the fsb a little. So, for example, from 1333 to 1400. See if it's stable, if it isn't try bumping up vcore one notch and try again. If not try Northbridge. Then later move on to stuff like the fsb term.
Test stability using prime95, there is a 64-bit multi-core aware version floating around somewhere. Try the ftp server linked to in the "hot use prime95" sticky on here.
Tbh with your OC you shouldn't need to touch any other voltages, or really use the gtl ref settings. What exactly is "sufficient" cooling though? Stock?
*EDIT: on a side note, just so you don't think I'm deliberately being awkward not telling you specific voltages, they wouldn't do you any good. Every cpu/mobo can handle different freq. at different voltages. Also, use cpu-z to check on your actual voltage and make sure you don't raise it beyond 1.3625 (I think that's right, it's 1.36something anyway)
Thanks for the tips. The reason I wanted to jump straight to FSB 1600 is because the MSI p7n is really picky and only likes 1:1 ratios.
My "sufficient cooling" is an aftermarket heatsink, high performance thermal paste, and MASSIVE airflow through my case. If you want specifics, its the Scythe Zipzang
Quote from: AaronYuri on 08-October-08, 09:05:16
CPU Voltage - No one can tell you this.
NB voltage - Depends on what frequency you want
SB voltage - What's your HDD setup?
NB Memory reference voltage - Auto
DIMM memory reference voltage - Auto
Memory terminator voltage - Auto
CPU GTL reference voltage - Depends on speed and other voltages
NB GTL reference voltage - Same as above
FSB terminator voltage - Depends on CPU voltage and CPU/FSB clock speed
SB sleep mode voltage - Auto
PCI Expander PLL voltage - Auto
My recommendation is do some reading. Guessing leads to dead hardware.
6GBs smells like mixing modules... Or do you have 3 modules?
First of all, I already stated the frequencies that I wanted in the top post, and fairly clearly at that.
CPU shouldnt be too hard to figure out, as there are very few to choose from. I'll try to get back to you on that one
I have 5, 7200rpm SATA 3.0 drives. It sometimes runs with only 4, as one is a hot swap.
My ram IS mixed, unfortunately. I'm using 2x 1gig sticks, and 2x 2gig sticks. However, both sets have heatsinks, and are rated at 800mhz, 4-4-4-12, 2t, timings. (2.1v)
I AM running them in dual channel.
If this helps you suggest voltages please do, If not, then I will just have to start trying using nihilkrist's suggestions.

Macbook Pro CPU Core's temperature measurments

I have a late 2011 15-inch Macbook Pro OS X 10.8.4 with BootCamp installed.
In OS X environment, the CPU core temperatures are around 40 - 44C, while in idle or with a minimum Safari browsing the net.
When in Bootcamp with Windows 7 Professional, in the similar operating/application condition, but the my Macbook's CPU Core Temperatures are always about 52 - 55C (10 degrees higher than in OS X).
While doing heavy stuffs such as Virus Scan, Time Machine, Data Backup, Video Editing etc ... on both environments the CPU core temperatures could go up to upper 80's degree C.
Is it normal ? if so, is there any explanation for 10 degrees warmer while in BootCamp/Windows ?
Thanks

RealTemp, CoreTemp but my money goes to AIDA64 for the most thorough information about all your devices, drivers, versions of, as well as temp and fan speed.
Latest drivers and utilities
http://forums.tweaktown.com/gigabyte/30530-latest-overclocking-programs-system-i nfo-benchmarking-stability-tools.html
GPU-Z:
http://www.techpowerup.com/downloads/SysInfo/GPU-Z/
AIDA64 Extreme Edition
http://www.aida64.com
http://www.aida64.com/product/aida64-extreme-edition/overview
CCleaner
http://www.piriform.com/ccleaner
BootChamp
http://www.macupdate.com/app/mac/28468/bootchamp
Lubbo FanControl for MacBook Pro
http://sourceforge.net/projects/lubbofancontrol/
- check forum for tip on how to get it to work with new Retina MBP
http://sourceforge.net/projects/lubbofancontrol/forums/forum/970570/topic/539412 2
TEMP cleanup
http://support.kaspersky.com/faq/?qid=208279128
How to view error message:
From Control Panel-> Admin. Tools-> Event Viewer-> Windows logs:
Check Application and System Folders for Red highlit messages. Note that you can right-click clear these log folders.
Memtest
This is a step by step guide with audio and video to explain how to use memtest to see if your memory is defect:
Another thing to add is that some errors will not be found on the first pass, best to do at least 3 passes.
http://www2.corsair.com/training/how_to_memtest/

Shell script for cpu governor toggling [SOLVED]

I am fairly new to shell (bash) scripting, but i thought i would at least manage an if test, though i was proven wrong :/
I have been looking at this for way to long by now, and i am positive i am just missing the obvious, though I just cannot see where im wrong (checked alot of examples of similar bash scripts)
The problem is that the code runs as if the if statement is always true (as if the `cat /sys/.../scaling_governor` is never updated). So what I think might have a say is the fact that it gathers info from /sys/... since i have never done that before
#!/bin/bash
if [ `cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor`="performance" ]
then
echo "conservative" >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo "conservative" >/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo "conservative" >/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo "conservative" >/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
echo "cpu governor: conservative"
else
echo "performance" >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo "performance" >/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo "performance" >/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo "performance" >/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
echo "cpu governor: performance"
fi
the code should "toggle" the governor for each core by checking 1 of them and applying it to all (I know the code probably looks sub-par, so if you can't handle it, please tell me how to improve it :P, or if there is a better solution to this whole thing altogheter)
Thanks in advance, and I will be trying to solve this in the mean time :)
Last edited by JulianNymark (2011-03-10 23:47:45)

That was a good idea AdmiralSpark (and also owain ), I didn't know that I could pass -r in cpufreq-set.
I really should be more thorough in my manual reading
I don't think i will be going for a GUI selection (though that is a good idea for this).
The next (and final) step for me would be to have some sort of pop-up message display what governor i switched to. (since I bound this to a button press event it will not display in active terminal?). But I havent really started looking into that yet, and should probably make another thread for that after i fail miserably .
Thanks again for the help & suggestions.

Can Essbase uses SGI 80 CPU core, 960GB super computer Octane III?

Recently SGI annouced a super computer that can support max 20 Intel Xeon X550 series CPU (total 20 * 4 = 80 CPU cores) and 960 GB memory (96GB * 10). Can Essbase support this kind of hardware deployment to gain maximum system performance?
The server can be used for Linux or Windows Server 2008 platform.
http://www.sgi.com/products/servers/octaneIII/
http://www.sgi.com/pdfs/4177.pdf

Is Essbase supported on Windows Server 2008? If so, why not. Wintel is wintel is wintel.
And I know you would be just the guy for this box. :)
Are you seriously considering this for Essbase? It would be fun to throw some benchmarking tests at a box like that. If your company buys this beast and applies it to Essbase, please tell us all about it, really.
Once upon a time, Hyperion used to taunt Oracle with benchmarking tests against Express or whatever Oracle called Express/OFA back then.
So, how fast do you think Sample.Basic would run on this machine? :)
Regards,
Cameron Lackpour

Only one CPU core recognized [solved]

For some reason the kernel only recognizes one CPU core out of two. I'm not completely sure at which kernel upgrade it disappeared but it is gone in 2.6.36 and 2.6.37. I know it was still there in september 2010 and earlier. I'm using a x86-64 kernel.
cat /proc/cpuinfo:
processor : 0
vendor_id : AuthenticAMD
cpu family : 16
model : 6
model name : AMD Athlon(tm) II X2 245 Processor
stepping : 2
cpu MHz : 2913.253
cache size : 1024 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc up rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt npt lbrv svm_lock nrip_save
bogomips : 5828.27
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate
Motherboard is: Gigabyte MA770T-UD3P. I use the latest bios.
I have tried adding the kernel options "acpi=off noacpi apic=off noapic" as to the suggestion of a ubuntu bug report in launchpad but it didn't help. I also disabled ACPI in the bios but I'm still limited to one cpu core.
Any ideas?
[SOLVED]
I just doublechecked the BIOS settings and it had the CPU Core Control set to manual and one core was disabled. I set it to auto again and now both cores are recognized correctly. I don't recall ever touching this setting but at least it works now. Maybe a bios update actually changed the setting or (more probable) a friend of mine.
Last edited by Baraclese (2011-01-17 19:01:02)

JOhnLiu wrote:
thanks for reply sb92075
[root@localhost ~]# mpstat -P ALL 2
Linux 2.6.18-164.el5 (localhost.localdomain)    09/12/12
09:29:09     CPU   %user   %nice    %sys %iowait    %irq   %soft %steal   %idle    intr/s
09:29:11     all    0.01    0.00    1.27    0.01    0.00    0.01    0.00   98.69   1658.29
09:29:11       0    0.50    0.00    0.00    0.00    0.00    0.50    0.00   98.99   1657.29
09:29:11      73    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      74    0.00    0.00 100.00    0.00    0.00    0.00    0.00    0.00      0.00
09:29:11      75    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      76    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00I think you don't understand what i mean .
there just have ONLY ONE CORE %sys 100
the top command show average of all cpu core sys% usage
when the one core sys% is 100%
the system are very slow .
e.g: when I create a database instance used for a long time . over 2 hours
but generally it will be done at most 1 hours or shorteris any type of OS virtualization involved in this environment?

Only one CPU core high sys usage when create database instance via dbca

when using dbca to create database instance
JUST ONLY ONE CPU core high sys usage
how to troubleshoot it
see this:
top - 09:28:19 up 55 days, 20:38, 10 users, load average: 1.00, 1.08, 1.31
Tasks: 1231 total,   2 running, 1228 sleeping,   0 stopped,   1 zombie
Cpu(s): 0.0%us, 1.3%sy, 0.0%ni, 98.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 57588328k total, 55028620k used, 2559708k free,   196852k buffers
Swap: 16386292k total,    23156k used, 16363136k free, 23011232k cached
PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
11343 oracle    25   0 1771m 30m 23m R 99.7 0.1   5:36.39 oracle
3692 oracle    16   0 13948 2348 816 S 1.6 0.0 17:00.94 top
11432 root      15   0 13540 2024 820 R 1.3 0.0   0:00.21 top
11034 oracle    16   0 737m 171m 33m S 0.3 0.3   0:52.39 java
11435 oracle    15   0 66056 1596 1180 S 0.3 0.0   0:00.01 bash
    1 root      15   0   784 172 160 S 0.0 0.0 38:56.76 init
    2 root      RT -5     0    0    0 S 0.0 0.0   0:00.58 migration/0
    3 root      34 19     0    0    0 S 0.0 0.0   0:00.75 ksoftirqd/0
    4 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 watchdog/0
    5 root      RT -5     0    0    0 S 0.0 0.0   0:00.81 migration/1
    6 root      34 19     0    0    0 S 0.0 0.0   0:00.00 ksoftirqd/1
    7 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 watchdog/1
    8 root      RT -5     0    0    0 S 0.0 0.0   0:02.53 migration/2    mpstat info
[root@localhost ~]# mpstat -P ALL 2
Linux 2.6.18-164.el5 (localhost.localdomain)    09/12/12
09:29:09     CPU   %user   %nice    %sys %iowait    %irq   %soft %steal   %idle    intr/s
09:29:11     all    0.01    0.00    1.27    0.01    0.00    0.01    0.00   98.69   1658.29
09:29:11       0    0.50    0.00    0.00    0.00    0.00    0.50    0.00   98.99   1657.29
09:29:11      73    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      74    0.00    0.00 100.00    0.00    0.00    0.00    0.00    0.00      0.00
09:29:11      75    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      76    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      77    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      78    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      79    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11     CPU   %user   %nice    %sys %iowait    %irq   %soft %steal   %idle    intr/s
09:29:13     all    0.01    0.00    1.26    0.01    0.00    0.02    0.00   98.70   1761.19
09:29:13       0    0.50    0.00    0.50    1.00    0.00    1.99    0.00   96.02   1761.19
09:29:13      71    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      72    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      73    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      74    0.00    0.00 100.00    0.00    0.00    0.00    0.00    0.00      0.00
09:29:13      75    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      76    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      77    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      78    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:13      79    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00          you can see there is only one CPU CORE (core 74 but is random , other core have same status but just one CPU core)
[root@localhost ~]# vmstat -S m 2
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b   swpd   free   buff cache   si   so    bi    bo   in   cs us sy id wa st
3 0     23   1861    203 24267    0    0     8    12    0    0 0 0 99 0 0
4 0     23   1845    203 24262    0    0   602 16460 3682 8121 2 2 96 1 0
3 0     23   1842    203 24276    0    0   692 7520 3297 6610 2 2 97 0 0
3 0     23   1830    203 24277    0    0   786 3040 3302 7118 2 2 97 0 0
4 0     23   1829    203 24277    0    0   126 3144 3247 7343 2 1 97 0 0
3 0     23   1827    203 24279    0    0    76 2944 3292 7502 2 2 96 0 0
3 0     23   1823    203 24281    0    0     0 3248 3164 7656 2 1 97 0 0
2 0     23   1827    203 24279    0    0     0 3646 3080 7480 2 1 97 0 0
2 0     23   1828    203 24279    0    0     0   476 2942 5648 1 1 98 0 0
3 0     23   1824    203 24281    0    0     2 7476 3377 8111 2 2 97 0 0iostat infor
avg-cpu: %user   %nice %system %iowait %steal   %idle
           1.28    0.00    1.29    0.00    0.00   97.43
Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
hda               0.00         0.00         0.00          0          0
sda               5.47         0.00        83.58          0        168
sda1              0.00         0.00         0.00          0          0
sda2              5.47         0.00        83.58          0        168
sda3              0.00         0.00         0.00          0          0
sda4              0.00         0.00         0.00          0          0
sda5              0.00         0.00         0.00          0          0
sdb               8.96         0.00       123.38          0        248
sdb1              8.96         0.00       123.38          0        248
avg-cpu: %user   %nice %system %iowait %steal   %idle
           1.27    0.00    1.27    0.00    0.00   97.46
Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
hda               0.00         0.00         0.00          0          0
sda               0.00         0.00         0.00          0          0
sda1              0.00         0.00         0.00          0          0
sda2              0.00         0.00         0.00          0          0
sda3              0.00         0.00         0.00          0          0
sda4              0.00         0.00         0.00          0          0
sda5              0.00         0.00         0.00          0          0
sdb              17.50         0.00       236.00          0        472
sdb1             17.50         0.00       236.00          0        472
avg-cpu: %user   %nice %system %iowait %steal   %idle
           1.29    0.00    1.30    0.01    0.00   97.41
Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
hda               0.00         0.00         0.00          0          0
sda               0.50         0.00        16.00          0         32
sda1              0.00         0.00         0.00          0          0
sda2              0.50         0.00        16.00          0         32
sda3              0.00         0.00         0.00          0          0
sda4              0.00         0.00         0.00          0          0
sda5              0.00         0.00         0.00          0          0
sdb               7.50         0.00       144.00          0        288
sdb1              7.50         0.00       144.00          0        288more detail:
database version 11.2.0.2.0
system version
[root@localhost ~]# cat /etc/issue
Red Hat Enterprise Linux Server release 5.4 (Tikanga)
Kernel \r on an \m
[root@localhost ~]# lsb_release
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linuxhardware info
vendor_id       : GenuineIntel
cpu family      : 6
model           : 47
model name      :        Intel(R) Xeon(R) CPU E7- 4860 @ 2.27GHz
stepping        : 2
cpu MHz         : 2261.057
cache size      : 24576 KB
physical id     : 3
siblings        : 20
core id         : 18
cpu cores       : 10
apicid          : 229
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx pdpe1gb rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx smx est tm2 cx16 xtpr popcnt lahf_lm
bogomips        : 4522.11
clflush size    : 64
cache_alignment : 64
address sizes   : 44 bits physical, 48 bits virtual
[root@localhost ~]# free -m
             total       used       free     shared    buffers     cached
Mem:         56238      55892        346          0        196      23645
-/+ buffers/cache:      32050      24188
Swap:        16002         22      15979
[root@localhost ~]# df -h
Filesystem            Size Used Avail Use% Mounted on
/dev/sda2              19G 4.9G   14G 27% /
/dev/sda5             230G   27G 192G 12% /home
/dev/sda1              99M   12M   83M 13% /boot
/dev/sdb1             2.9T 2.3T 464G 84% /arrayEdited by: JOhnLiu on Sep 11, 2012 7:31 PM

JOhnLiu wrote:
thanks for reply sb92075
[root@localhost ~]# mpstat -P ALL 2
Linux 2.6.18-164.el5 (localhost.localdomain)    09/12/12
09:29:09     CPU   %user   %nice    %sys %iowait    %irq   %soft %steal   %idle    intr/s
09:29:11     all    0.01    0.00    1.27    0.01    0.00    0.01    0.00   98.69   1658.29
09:29:11       0    0.50    0.00    0.00    0.00    0.00    0.50    0.00   98.99   1657.29
09:29:11      73    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      74    0.00    0.00 100.00    0.00    0.00    0.00    0.00    0.00      0.00
09:29:11      75    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00
09:29:11      76    0.00    0.00    0.00    0.00    0.00    0.00    0.00 100.00      0.00I think you don't understand what i mean .
there just have ONLY ONE CORE %sys 100
the top command show average of all cpu core sys% usage
when the one core sys% is 100%
the system are very slow .
e.g: when I create a database instance used for a long time . over 2 hours
but generally it will be done at most 1 hours or shorteris any type of OS virtualization involved in this environment?

Decreasing voltage for CPU core

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