ONE Core Live processing

I am using my rig mainly for live performance. I am quite aware of the single core usage in record/input enabled tracks, I am to understand for latency reasons? My question, is that if I purchase a quad core laptop, doesn't that mean I will theortically get LESS processing power than a duo core, since the power is cut to a quarter instead of half? (assuming the speed and chip the same)
Does anyone know what it will take to spread the live performance over multiple cores without a hit to latency? Nodes maybe?
I have done Evan's benchmark, but is there one for live performance???
Thanks

Hi
danois wrote:
Ahhhh, now maybe you are on to something that I am unaware. I thought that slaving LP to MS required IAC, which you had suggested earlier could pose potential problems.
The issues with the IAC are that it is easy to get MIDI feedback loops (at Logic's end and at MS). I have read (not personally experienced) that there can be latency issues too???
danois wrote:
Are you saying that there is another way to slave LP to MS with two computers, one running LPX (my old MBP) and another running MS3 (the new MBP)? How? via ethernet? Firewire?
I was thinking of plain, old-school, MIDI Out from MS via External Track to MIDI interface, cable to MIDI Interface on the "Logic Mac". You could MIDI learn Logic keycommands to operate various functions such as Play/Stop etc, or similar, and simply transmit them from Screen Control Mappings in MS, or use an External Instrument Channel to send MIDI Start/Continue/Stop messages??? Never tried it, but should work.
You could probably do that all on 1 Mac, provided that you were careful to block MIDI Inputs from going to the wrong application.
danois wrote:
In regards to running other third party software to process plugins, just too unstable to work live. Not to mention harder to troubleshoot, etc...
Vienna Ensemble Pro is pretty rock solid, but does need a dongle.
CCT

Similar Messages

Itunes 8 using 100% CPU on one core.

Hi Guys,
Since today Itunes seems to be using up 100% CPU on one of the two cores. This happens shortly after i started it - for example when i play a song.
After a few minutes it will be reactive again and then i can choose another song - after which it will hang again. It also hangs when changing for example from Films to Music. I have the idea that it happens when i click the Music library - but am not sure. I disabled AV for the itunes library folder - but that didnt change anything. This has been working fine until today. I even uninstalled and re-installed version 8. The only thing that might be related is that when i upgraded to ver. 8 i used the update function in itunes - which didnt work as well - left me with some unusable shortcuts etc. But the app itself was working.
OS is vista.
Just saw that this is for the store only - Moderators please move if possible.
Message was edited by: Dave20007

wilberfan wrote:
Dual-core, 32-bit Intel machine. Did an -Syu two nights ago. A dozen or so packages upgraded--including (I remember) the latest nvidia (302.17-1).
When I first boot-up, I get 100% CPU on one of the cores. htop reveals that it's the X session that's running away (?) Rebooting seems to take care of it--although I don't understand why yet...
Anyone experiencing this--or have any suggestions on what I could look at to see what the problem might be?
Thanks in advance...
I had this problem with mount. In fact asking the system for shutdown would set a live lock on a mount process taking one core.

ACPI Interrupts occupy one core totally

Hello.
I have a Samsung NT700Z5C-S78 laptop bought about one and a half years ago.
(btw, I replaced the laptop's HDD with an SSD (Samsung SSD 840 EVO).)
Recently, I have noticed that the System process uses 100% of one core, so I did some research through Google, and have tried:
- cleaning-up dust inside the laptop
- editing "HKLM\SYSTEM\CurrentControlSet\Services\ACPI\Parameters\Attributes" key to 100 or 70 (HEX)
- upgrading the bios
- installing Windows 8 cleanly
- upgrading to Windows 8.1
- re-installing Windows 7
- disabling the device "Microsoft ACPI-Compliant Control Method Battery"
but still the same.
Process Explorer says that "Hardware Interrupts and DPCs" occupies the core,
and LatencyMon shows ACPI.sys is the problem.
Can anyone help me to resolve this?
Here is the etl file from my laptop:
https://skydrive.live.com/redir?resid=2CCEBED319172246!328&authkey=!AGKgHDq9w8BqkF4&ithint=file%2c.zip
Thanks.

Hi，
The file, ACPI.sys, is a system driver that is used to facilitate the advanced power management features of the motherboard. There appears to be a conflict on your system between the BIOS and the driver layer of your system. Please ensure the BIOS and motherboard
chipset are up-to-date and they support Windows 7.
If the issue persists, you may try to disable ACPI for a try: when you start your computer. Then, open the Power Management Setup menu. And find ACPI, select "NO" to "ACPI Aware Operating System". After that, just
type Exit and begin the installation process again.
According to your etl file, I found this process got High disk usage:
http://www.file.net/process/dmhkcore.exe.html
Please note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Maybe we can try to update Easy Display Manager or disable it to check the results.
Hope it helps.
Regards,
Blair Deng
Blair Deng
TechNet Community Support

Oracle utilizes only one core out of 8 core's.

Dear Team ,
We have noticed that, in oracle database server Oracle processes uses only one core and that goes to 100% usage remains are at idle possition thats the reason the Oracle performance is very poor some time system haults and needs to be started
Please suggest if you can have best solution,
waiting for your valueable response.
Regards,
Naveed Amir

860707 wrote:
We have noticed that, in oracle database server Oracle processes uses only one core and that goes to 100% usage remains are at idle possition thats the reason the Oracle performance is very poor some time system haults and needs to be startedNot unusual. It is often slower running processes across CPUs (e.g. 5 processes on 5 CPUs with 15% CPU utilisation per CPU), than running these processes on the same CPU (e.g. 5 processes on 1 CPU for a 75% CPU utilisation). See Non Uniformed Memory Access (NUMA) for some details on why this is the case.
The kernel deals with CPU scheduling. It decides which process/thread to execute on which CPU. From a s/w perspective, one can code "processor affinity" into your s/w to bind a process or thread to a specific CPU. Oracle only does this with Oracle XE - as this is one of limitation of the free version of Oracle's database s/w. Oracle uses default kernel scheduling for Standard Edition and Enterprise Edition versions.
Oracle uses the number of CPUs/cores to determine the processor load it can create. It does not force its processes to run on a single specific CPU (with XE being the exception).
So "blaming" Oracle for what you are seeing? You are blaming the wrong layer in the s/w stack. You are also very likely misinterpreting what you are seeing.
The #1 reason for poor Oracle performance is shoddy code. Code that you and your cohorts write and run in Oracle. And that is a far likelier candidate to blame for shoddy performance, than blaming Oracle and the kernel's process scheduling across CPUs.
And you have provided not a single shred of evidence that points to a SMP scheduling issue across multiple CPUs/cores.

Second mac in cluster uses only one core

Hello all. For some reason the second computer in my render farm is using only one core out of eight.
I'm using 2 Mac Pros linked together directly via giga ethernet wire. Mac one is a Quad Core 3ghz. Mac two is a Octo Core 2009 model. Both computers have the same version of FCS3 with different serial numbers.
In the Qmaster preferance pane: Mac one is set to "Quickcluster with services" with the check boxes for Share and Managed next to "Distributed processing for Compressor" checked. 4 instances selected and "Include unmanaged services from other computers" checked. Mac two is set to "Services only" with check box for Share next to "Distributed processing for Compressor" checked. 8 instances selected and "Include unmanaged services from other computers" checked.
I hit submit in Compressor, select the name of the cluster from Mac one, then in the Batch Monitor I see the video divied into 10 sections with Mac one handling 4 and Mac two handling one. On Mac two I see that the cores aren't fired up 100%, more like 30% on average.
I did a test earlier with a dual core mbp, and again only one core. How do I get my Octo core to use all 8 cores?

Solved the problem. The solution was simple, but somehow went under my radar. On Mac two in the Qmaster preferance pane next to the "Options for selected service" button, the selected service was set to off.
Duh

T440s - i7-4600U CPU - ONLY ONE core operating :((

Hi,
I am an owner of Thinkpad T440s ultrabook, which has Intel i7 4600U CPU installed (exact model is 20AQ006BMC - the one with GeForce 730M graphic card).
Regarding to the documentation on Intel website, this CPU should have 2 cores and 4 threads (Hyperthreading). But when I start CPU-Z utility, it shows me, that I have only one core and two threads available. Same thing displays my process manager in Windows 8.1 - 1 core and 2 logical processors.
Any ideas, what could cause this problem?
Thank you.
Link to image 1
Link to image 2
Moderator note: large image(s) converted to link(s): About Posting Pictures In The Forums
Solved!
Go to Solution.

I have found review of exact same model (as I know, they differ in few other details like 3G modem etc.): http://www.notebookcheck.net/Lenovo-ThinkPad-T440s-20AQ006BGE-Ultrabook-Review-Update.120211.0.html
And there is also screenshot from CPU-Z utility and there it shows correctly 2 cores and 4 threads:
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Equium A110 - 252 (PSAB2E) - Only one core is working

Have a Equim A110-252 running Vista Home premium. Only one core working. BIOS set to core multi-processing enabled.
Bios version V5.20
Any ideas?
Regards

It appears this model came with XP. Did you install Vista or upgrade to Vista?
Perhaps you need to install or update the Intel Chipset Driver, or install the Value Added Package.

Dual Processor Multi Core Parrell Processing Question

Hey Guys
I'm looking for a little clarification on an issue with parrell
processing in LabView. If I have a Dual Processor machine with two 4 core CPU's
will be able to access all 8 cores in the LabView environment. I'm presuming it
can use any cores the operating system can see?
Thanks for the help,
Tom
Solved!
Go to Solution.

Norbert B wrote:
it is the job of the OS that applications can use all cores if necessarry. So for the application itself, it should make no difference if the system (in hardware) is MultiCPU, MultiCore or even simply HyperThread.....
Norbert
Its true, but I would like to add my 5 cents here.
Lets say, if you have single loop like
while (true){
//do something
then OS will get no chance to run it in multiple threads. So, you will get max 12,5% CPU load at 8 cores PC or 50% max on dual core PC.
I have dual core PC right now, and lets check it:
So, as we can see - 50% CPU load reached (one core loaded more, but its another story).
Well, if we will use two while loops, then we will get 100 % load:
Of course, if you will need to load all 8 cores, then you should have 8 parallel loops.
Compare BD above with the following:
We have two Array minmax functions, and they independend, but we have 50% only.
Well, you can get also 100% CPU utulization withing single while loop. In th example below you have two SubVI, which called in the same loop:
We have here 100 %. Important, that these VIs should be reenterant!
See what happened if they not reeenterant:
Now a little bit about Vision. Behing of most of the Vision SubVIs are DLL calls. Some Vision functions already optimized for multicore execution. For example, convolution:
On the BD above we have single loop with one SubVI, but both cores are used (because convolute itself already optimized for multi core).
Remember, that not all Vision functions optimized yet. For, example, LowPass still single-threaded (compare this BD with BD above):
Sure, we can utilize multi cores - just perform parallel execution (you have to split image to two parts, then join together and so on):
Remember, that SubVIs should be reeentrant, and all DLL calls should be thred safe (not in UI thread). Also good idea to turn off debugging in such experiments for eliminate additional CPU load.
Another point about 8 cores. As far as I know, LabVIEW (and LabVIEW-based application) will support only 4 cores within one execution system by default (at least prior to LabVIEW 2009). If you need to utulize all 8 cores, then you should add some lines into LabVIEW.ini. Refer to the following thread where you can found more details:
Interpolate 1d slow on 8 core machine
Hope all written above was correct.
Thank for reading and best regards,
Andrey.
Message Edited by Andrey Dmitriev on 11-27-2009 02:50 PM

Motion 5 using only one core

Why is motion 5 using only one core during heavy renders, even when all other apps are closed?
Version 5.0.3

coz it uses the GPU to do all the graphics stuff. The cores are only used to process project data.
adam

Unsigned Core Windows Processes

Using Process Explorer from the SysInternals suite, I found that key windows processes are unsigned. Some of the key ones are as follows: smss.exe, csrss.exe, services.exe, wininit.exe, winlogon.exe.
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K9VGM-V and dual core, task manager recognises one core?

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Mid Year Go-Live Process

Hi All,
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Regards

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Cheers

I created a new administrator USER account. I deleted the original one but the process never ends. It's been 3 days now.

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Hi
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Regards
kailas Ugale

How to handle the One-Time Customer Process (Customizations - Master Datas)

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Hi..
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ONE Core Live processing

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