Only using 1 of 4 cores ?

Hi
Everytime there is a high processing app running at max, it seems to use all of one core block on Activity Monitor, but the rest of the 3 remaining cores are empty. AM shows 100% cpu and things dont get any better if i open another app alongside - it just detracts from the one processor being utilised at any one time.
It just seems that i dont get the benefit at all of the 3 redundant cores ?
is there any way i can change a setting to get more cores working all the time instead of one maxing out at a time ?
cheers

Applications must be written in multi thread to spread across multiple cores, single thread application, like QT I think, will always run on one core. I don't know why, off hand, running more applications will not use more cores, perhaps an OS issue.

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Pages '09 only uses one processor core?

Hello,
some days ago i had to open a document containing nearly 2.000 pages. Don't ask why.
Working with this document was quite complicated because Pages was responding very slowly. I used the activity monitor to see what was going on and i recognized that Pages only uses one core of my eight core MacPro.
I tested iWork on my iMac and MacBook Pro (both DualCores) as well: same problem.
Does iWork only use one processor core?
Kind regards,
roman

How much memory do you have in your system? I'll bet if you check activity monitor (applications/utilities) and go to system memory tab therein you will see lots of page outs. This happens with huge docs and little memory as the doc is being swapped between active operating memory and the hard disk The only way to solve this problem is to get more memory (not storage) in your system. For a 2,000 page doc you're going to need lots and lots and lots of extra gigs of memory. By the way - how big is the too big file of yours?
Number of processor cores isn't going to solve the issue if you have pageouts. It is a system memory/size of document issue and completely unrelated to how many processor cores you are using.

AME is only using one processing core out of six.

I have not been able to figure out why AME is only using one of the six processing cores that I have in my Core i7 hex core processor. I'm running Windows 7 Ultimate 64 bit and the latest version of AME 2014 CC. When I render in Premiere Pro CC 2014 all cores are utilized. The codec that I'm using in AME is "YouTube SD 480P 29.97 - H.264". The video that is being encoded is fairly complex but it is only 30 minutes long and AME is estimating 18 hours to completion. That seems pretty excessive for that length of video.
Any help would be greatly appreciated.

This forum post may be related to your question.
Re: AME CC2014 Very Slow Encoding

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.

Why is QuickTime export only using 2-4 cores?

I'm trancoding video in QuickTime Player 7 (to H.264 and AAC), NTSC dimensions and good quality. It's taking quite a while, but it should be going faster for what I have. I have an 8-core Mac Pro, but the export process only ever goes a little above 300% CPU usage, meaning that it's using 4 cores max. My CPU isn't maxed out by anything else, and I have 3GB of free RAM.
Transcoding video is supposed to be a totally parallel task, but it's not using all of my cores. Any explanation or fix for this?

Premiere Pro and Adobe Media Encoder will take all the resources it needs to do it's work. If it's not using all available resources, it's because it just doesn't need them. One possible reason for this is you're using an effect that's just very slow.

Windows XP Mode (Virtual PC) only uses half a CPU core/thread.

Not only does windows xp mode not support multiple cores, to me it looks like it only uses half a core/thread.
I noticed this because I just setup windows xp mode (virtual pc) on my computer. I updated it, joined it to our domain and then installed our legacy ERP software. This ERP software was designed and programmed to run on windows 98 or 2000, I can't
remember right now, but its hardware requirements are very low. This software runs very slows in the virtual pc, with the processor being the problem.
Matching the processor spike on the virtual pc using both performance monitor and task manager I compared it to task manager running on the host (my windows 7 machine). The spikes in cpu matched one of the threads on my i7 processor (I use threads
because an i7 has 8 threads but only 4 cores). To my surprise when the CPU reached near 100% on the virtual PC the same spike on the host was only about 50% of the cpu thread.
The host has a i7 950, 3.07GHz processor. So this means that the virtual pc can only use up to 1.5GHz. I have not run into the problem reported in other posts on this forum where the CPU is always at 50% or 100% on the virtual PC because when
their is no activity the CPU drops to 10% or less and stays there.
I will now have to use vmplayer, problem is having enough xp licenses for all users.
Was anyone else aware of this?

You can't use a half a thread. Windows VPC uses one core at 3.07GHz, there's no halving the speed of the CPU.
The only way WVPC would use a lower clock speed is if there is power management throttling the CPU speed down. Do you have a power management setting throttling your CPU? Are you sure the problem is the CPU and not disk or network related?
Task manager on the host is not a very accurate way to determine CPU usage of the VM.
If you have the correct version of Windows 7 (Pro or higher) there are no issues with XP Mode licenses, you get one license included with Windows 7. There's no restriction requiring you to use XP Mode with Windows VPC, it will work under 3rd party
virtualization solutions.

Adobe Media Encoder only using single core of CPU (core parking has already been disabled and did not solve the problem)

I only edit videos every few months and the last time I edited a video was around 6-9 months ago. At that time, I noticed AME was only using a single core of the CPU and contacted Adobe who instructed me to disable core parking, which worked. After disabling core parking AME used 100% of all 12 logical cores to process the video and all was good. Then last week, I decided to edit another video and noticed AME was very slow and checked and it was again only using a single core to process the video, but core parking is still turned off. By slow I mean that a 10 minute video with the lens distortion correction preset and one video transition effect is estimated to take nearly 3 hours to complete. For comparison, the GoPro software processed the same clip with the same effects in 20 minutes. Also, through troubleshooting with Adobe over the last few days, I have also tried downloading previous versions of the software but the prior versions have the same issue.
The video I'm trying to edit was shot on a GoPro Hero 4 Black with 1080p Wide at 60 frames per second. The default video format for GoPro is .mp4. The output settings I'm using when I export from Premiere Pro to AME are H.264 with the YouTube 1080p HD.
My system:
ASUSSabertooth X79
Intel core i7 4930k (6 physical cores, 12 logical cores)
16GB DDR3 Quad channel RAM
Samsung 830 SSD 128GB
NVIDIA GeForce GTX 460 (not CUDA compatible, I know)
Please ask if you need any additional information to help solve this problem.

This has been driving me CRAZY... so going over the message boards from 2 to 5 am this morning I found the best explanation I have seen. The problem is that Adobe Creative Cloud is NOT "Processor Group Aware". Windows parses any more than 36 cores into "Processor Groups" and while the Pro version of Windows 7 & 8 can handle 256 threads they have to spread them across multiple processor groups.
Simple Version: AREA | How many cores does 3ds Max support?
Microsoft's Explanation: Processor Groups (Windows)
Clearly, this is an Adobe Problem... If any engineers are reading this PLEASE review the below and incorporate it into your next build of Creative Cloud!!!
https://msdn.microsoft.com/en-us/library/windows/hardware/dn653313%28v=vs.85%29.aspx
Again, I bought a VERY expensive machine based on your white paper that recommended Dual Xeon Workstations. Please, Please Give us the product you PROMISED!!!
Michael

My Logic 9 Pro is only using a core from my minimac (of 4 cores)

Hi, friends!
I´m using Logic 9 Pro, and i have a problem: It is only using one of the 4 cores of my computer (Mini mac).
Can anybody help me?
Thanks!!

Hi.
i am having the same problem. Working with a 12 cores Mac pro, logic 9.1.8 and vep 5(10 instances with kontakt instruments, 16 in each one). only one of the cores is working, sometimes picking, and i am trying to do the aux process as ErikSimon said in his post, but with no success. is there another alternative to this?
help please!!
Thanks!!

Dual Core Mac only using 30% processor power.

Hi,
I'm running Motion on a Dual-core 2.3GHz G5 Power Mac. My Motion renders are really slow - and bring the whole system to a crawl.
Using Activity Monitor and Menu Meters, I can see that Motion is only using, at most, 50% processor power between the two cores.
The machine has 4GB of RAM so that shouldn't be an issue, and I've run the same Motion files on my old 2.0 Dual G5 at home and the renders use 95% of each processor and are much faster.
Is Motion not dual core aware?
Thanks,
Joe

CPU processing in Motion is not the workhorse. GPU does all the heavy lifting. What graphics card are you using?
See this thread for a comparison of various cards:
http://discussions.apple.com/thread.jspa?threadID=378164&tstart=0
Patrick

CPU Multi core processor only using 1 core

I have a 12 core CPU which works fine when rendering in Premier Pro utilizing all 12 cores but when I render in Media Encoder it only uses 1 core. This is a recent event that has occurred recently, has anybody got an idea what is happening?

hanugro,
I did some searching, and the processor you want, is not available in many places.
Even TigerDirect.com doesn't even list this processor. And, it must be VERY EXPENSIVE ! ( I'm guessing it will be $1,500 ? ), the one you list has a 1333 MHz bus speed !!
This is the most expensive processor they have listed:
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3241539
It is currently $579 ( as of today, Feb.14, 2008 )
Intel Core 2 Quad Q6700 Processor BX80562Q6700 - 2.66GHz, 8MB Cache, 1066MHz FSB, Kentsfield, Quad-Core, Retail, Socket 775, Processor with Fan

T61 only using one core under Windows XP?

Hi,
I have a T61 that came preinstalled with Vista but we reinstalled XP Pro SP 3 on it since we need to work with software which doesn't work with Vista.
When looking in Windows Task Manager, it only shows me one core. I don't know whether the Vista Task Manager did this too (never had a chance to see it before it was reinstalled). Also CPU-Z can only identify one core, even though it correctly identifies the CPU as being a Merom T7300 CPU.
Could it be some power-saving option somewhere that is keeping the second core deactivated? Note that I don't have the Thinkpad softwares installed, since they didn't provide any functionality that worked better than Windows XP itself.

I have somewhere seen a setting to disable the second core as a power saving feature, but for the life of me I can't remember where, and I don't have my T61 on me to look at right now. I'm thinking it was part of the thinkvantage power settings program, but I could be wrong.
T61 15.4" T9300 (2.5GHz 6MB L2) Windows 7 Professional x64 4GB Memory, NVidia Quadro NVS 140M

Bridge is slow because it's only using two threads

I'm finding that Bridge (CS6) exhibits very poor performance when building 100% previews, I think the software is limited to only two threads.
If you load bridge and go into a folder with some images and then Tools->Cache->Purge you'll see that Bridge takes a long time to rebuild the previews even on a high end machine, especially if you have both "Always High Quality" and "100% Previews" selected. I think the problem is that it appears to build the previews using only two threads on the CPU, so while a 2005 dual core machine might get maxed out, a Quad Core, or 8 Thread, or even 12 Thread machine sits there mostly idle while Bridge grinds away for an hour or more.
It's easy to check this, just load up Windows Task Manager, and view the "Processes" tab and Bridge will only ever use 2 threads worth of CPU cycles, i.e. 50% on a Quad Core, and 17% on a 12 Thread high end desktop. I've seen the problem with JPG files, PSD files, and NEF files (Nikon RAW). The processing time of large Nikon D800E NEF files is very slow. After shooting 900 images I can expect the preview build time to take over an hour on a super high end machine with loads of memory, storage IO, and CPU cores and threads, all because it appears bottlenecked on software design. Meanwhile the machine is only running at roughly 20% utilization, the memory barely used, and the IO system close to idle.
I'm using Windows 7 Ultimate 64-bit, 64GB RAM, 12 Thread Core i7 3960X at 4Ghz, two Nvidia GTX470 graphics (in SLI), a 2-way RAID-0 SSD storage array for the OS, and an 8-way RAID-0 SSD array for the photoshop work files. The hardware is clearly not the issue. Although, just to check, I confirmed the same problem exists on a simple Win8 Core i7 system, and a Core i5 laptop.
Even worse, after waiting an hour to build previews for 900 images (3 seconds each), after adding GPS data, or after making edits in Camera Raw it then needs to rebuild all the previews again, this is understandable, but super fustrating when you know it's not working as fast as it really should be.
To be clear, I'm not upset it takes 6 seconds per image per thread - there's a lot of work to do, especially with D800 files. But I'm upset that Bridge's software design only uses 2 threads, and thus limits performance to building a preview every 3 seconds, when in fact it could be working 6 times faster on a PC with 12 thread, and I find it shocking that Adobe's latest software wouldn't be optimized for anything more than a dual core CPU, wasn't quad core launched in 2006?
Roland.
P.S. for any Adobe Tech's reading - I submitted this under case number 184020852 and there's an attached PDF in the ticket including several screenshots.

There have been many discussions in Photoshop forum about processor speed and multicores. I know Bridge is not Photoshop but it may give you some insight as what is going on. Photoshop has supported multithreading since CS3. Here is a quote from Adobe Tech Note:
Photoshop generally runs faster with more processor cores, although some features take greater advantage of the additional cores than others. There is a law of diminishing returns with multiple processor cores: The more cores you use, the less you get from each additional core. Therefore, Photoshop doesn’t run four times as fast on a computer with 16 processor cores as on a computer with four cores. For most users, the increase in performance that more than six cores provides doesn't justify the increased cost.
I run embedded thumbnails (therefore 100% previews are off) as they take up less space and are the fastest to load. I ran a simple test with Bridge CS5 (32 bit) and CS6 (64 bit) on one folder of 200 video images totaling 16 gigs, or 80 meg per file. With folder loaded I clicked Tools/Cache/purge cache for xxx folder. I then timed the rebuild until the arrow stopped spinning in lower left hand corner. For CS5 the time was 35 seconds. For CS6 the time was 72 seconds.
I then took a folder of 1147 jpg images of 660 meg (427k/image). In CS5 it took 12 seconds to build the cache, and the same for CS6. However, the interesting part of this is when I loaded this folder in CS6 I had never been there before so it had to build it. THis took 80 seconds. When I purged it an it rebuilt it took 12 seconds. I have noticed this phenomemum before where the initial build takes 5-7 times longer than a rebuild of the cache.
I then ran the same test with the still images with 100% preview and Always High Quality. With CS5 it took 3 min 30 seconds and with CS6 it took 5 min. 20 seconds.
So with these very SIMPLE tests I conclude that CS6 has quite a bit slower cache process than CS5. As we have all learned with buying new products, new and improved does not always mean it is better.

CPU Processing Distribution Question. Will 4 core VM use all physical cores on physical processor(s)?

Sorry if the title is vague, I am unsure how to properly word my question down to a single line. Anyways, on to my question, if I have two 16 core processors in a server, but I have 1 virtual machine that is setup with 4 cores, will the vmware only use 4 of the physical cores, or will the processing be distributed among all the cores? If searched the documentation but was unable to find much information about this specific situation. The reason I have it set to 4 cores instead of more is because the application I am trying to run only uses up to 4 core and if I can use vSphere to distribute out that processing it would greatly improve the performance. Thank you in advance.

Welcome to the Community - a VCPU can only run on a single core at a time - so your 4 VCPU vm will run only 4 of the 32 cores that are available in you ESXi host but each - the ESXi host is also smart enough not let the any of the 4 VCPUs share core either. By default the VM's VCPUs can be scheduled on any of the 332 physical cores
I am also moving your question to a more appropriate forum.

Optimizing: Use all 8 cores

Hi, I have an early 2008 Mac Pro with 2 quad core 2.8GHz. When ever I run simulations(around 10,000) in Excel 2004 or when I'm running a program in Matlab it takes a long time, (longer than an old Dell with a Pentium 3 1.8GHz). When I open up the activity monitor it shows that it is only using 12% of the CPU and the other 88% is just sitting idle. I was wondering if there is a way to tell the computer to use all of the CPU for a specific task or if it needs to be done in the program.
Thanks in advance for your help.(I'm not sure if this is in the correct place in the forum. Sorry if it is.)

Intel brings thread optimisation tool to OpenSolaris
By James Niccolai, IDG News Service
Developers who use C++ and Sun's OpenSolaris OS are to be offered a new tool. Intel said that Threading Building Blocks was aimed at reducing the amount of coding that C++ developers have to do to take advantage of the extra computing power in multicore chips.
C++ isn't designed in a way that takes advantage of multiple cores naturally, so application performance won't scale proportionally as additional cores are added. Threading Building Blocks aims to address that.
It is already offered for Windows, Linux, the Mac OS and FreeBSD and it's now available for OpenSolaris, said Doug Fisher, general manager of Intel's Systems Software Division
http://www.techworld.com/applications/news/index.cfm?newsID=101454
Intel released new compilers last fall with the advent of the Penryn to help generate better optimizations for multi-core chips for use on OS X and other platforms.
Still early on in the multi-core systems, though I think Apple has been on top of the ball, applications do need to be recomiled or even moved to new code base.
CS4 is suppose to come out in 64-bit version for Vista while the OS X version will take longer and wait for CS5.
And the OS can do some of the work at times to help scheduling. But there are times when moving code and data between cores can be ineffecient and lead to "core" or "thread" thrashing which is why you see much larger L3 caches in some systems to take up the latency penalty.
Taming the front side bus, moving to direct connect, embedded memory controller, and also, "Penryn" is two dual-core cpus in a package, while the next generation will be a true native quad-core, the Penryn chip is still more efficient clock for clock over its predecessor Xeon used in 2007 Mac Pro.

Using Motu DP and Logic Together - More use of all cores on the PPC Quad

Since there's been some talk about how DP uses four cores on the PPC quad lately I thought I might add what I've been doing to take advantage of untapped processing power. If you have DP (I am running 4.5) you can run it alongside Logic Pro and use interapplication midi (built into Logic and DP) to play Logic's instruments from midi tracks in DP. This is fairly easy to set up in the environment.
With all of my audio recorded in DP I can use all my nice AU plugs there and benefit from DP's use of 4 cores - something I can't do with just the "node trick" in Logic. Logic is then just playing the role of audio instrument slave.
I tend not to like or use most of Logic's processing plugs for audio, but they are fine to process Logic's instruments with so this works well.
The exceptions are Space designer and the tape delay which I still use on recorded audio. To use these with audio recorded in DP I use Jack and/or Soundflower to virtually "patch" the audio through Logic and back to DP. I have no idea what this does to latency but who the heck cares with reverb and tape delay?
Of course I have and like DP so this is worth doing in my case.

Jack is more flexible than Soundflower. The latter sets up less output channels that afford you less possibilities. But, both have worked for me.
True that, in the beginning Jack was a little funky to use but that ended when I set up an agregate device driver for core audio.
As a new feature in one of the Tiger updates (I can't remember which one) you can now set up such a so called agregate core audio device and select that as your device driver in both Logic and DP. So for example I use a MOTU 828 as one of my tried-and-true firewire in/out boxes. So I setup an agregate device in core audio with this Motu unit and Jack (called it Motu 828/Jack OS)and then I selected it in Logic and DP. Otherwise I just had to select Jack (and not the MOTU) as my only output device in Logic and then route ALL audio through it just to get it in and out of the MOTU which was a pain since I couldn't have direct acces to my Motu ins and outs in Logic anymore. Jack became the go- between for everything. That was enough to make me give up.
But using the agregate device saved the day. I now see all of my old MOTU ins and outs in Logic and DP plus Jack's virtual ins and outs which I can then use to patch between the programs. This has worked perfectly fine.
Soundflower can be used similarly but you will just have less virtual outs and ins to deal with and you lose the intermediate step that you have in Jack where you connect the virtual ins to the virtual outs at will. It's done automatically. So this can be easier of course. Or, it can allow for less flexibility. Hope this helps.

Cc2014 not using all CPU cores or GPU

I'm using the new CC2014, and I exported a project straight out of Premiere and it utilized all 8 of my CPU and my GPU. When I export using Adobe Media Encoder, it only uses one core and doesn't seem to use the GPU at all. I tried changing the setting to from GPU to software only, and it didn't seem to make a difference.

Just found out, that drag and drop PPro Sequences into AME seems to be a work-around.Plus unchecking the "Import Sequences Natively" in AME.
Well, ..indeed it worked. Not very convenient though and it's a bug that's been around for a while (7 month!! according to some users).
Please fix this, cannot be too hard, can it?
What bothers me even more is a still low CPU usage of around 35% over all when exporting....
My system:
i7-5930K @ 4.40GHz (overclocked)
Gigabyte GTX 770 GB
SSD cache drive
HDD-RAID0 assets drive
Windows 8.1

Only using 1 of 4 cores ?

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