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10
votes
4answers
9k views

Compiz using 8% - 25% cpu continually

Any tips? Running Intel Core 2 Quad x64 ubuntu precise 12.04 Dell OptiPlex 760 nvidia graphics driver UPDATE: Unfortunately I uninstalled Ubuntu... Just couldn't deal with the incompatibilities and ...
2
votes
0answers
202 views

Why aren't all of my CPU cores always detected in ubuntu 14.04 with an Intel Core Duo 2 CPU?

I'm using Ubuntu 14.04.2 LTS with kernel 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux. Computer model: iMac Late 2009 ( ...
1
vote
0answers
38 views

How to forcefully run two thread on two cores

I have a C Code in linux, in which I have two Pthreads. What I have to do is that, I want every thread running on different Cores. For Example, I have two cores, so one thread should execute on core1 ...
2
votes
1answer
120 views

Not all cores registered, Ubuntu 14.04 i7-2630QM

I'm not sure when this happened, but for some reason my processor is only using two out of 4 physical/8 logical cores. I've tried to remove acpi=off from /etc/default/grub with no luck. I've changed ...
1
vote
1answer
72 views

How can I get the number of hardware level threads in my computer?

How can I get the number of hardware level threads in my computer using the ubuntu terminal?
0
votes
0answers
176 views

My Hp laptop( 64 bit, Core i5, 4 GB RAM) is too much slow in ubuntu 14.04.1

My HP laptop is very slow after few days from complete installation. System details as follows. Core i5 processor, 4 GB RAM, 500 GB HDD, 64 bit processor. Now I installed ubuntu in 100 GB disk space. ...
3
votes
1answer
142 views

Gimp uses only one CPU when applying a Gaussian Blur

If I use "Selective Gaussian Blur" in Gimp, only one CPU gets used. My PC has four. Is there a way to tell Gimp to use all available CPUs? Some operations take quite long, and this would reduce the ...
0
votes
0answers
161 views

Ubuntu 14.04 : Core 2 Duo : System wont boot when Multi Core processing is enabled

I belive you guys are having good time. Well i am not!! I got an annoying problem with my Laptop(Thoshiba L310). She wont boot if Multi Core processing is enabled. On booting, just before i enter the ...
1
vote
0answers
732 views

Support for cores revisions 0x17 and 0x18 disabled by module param allhwsupport=0

I was wondering if there is a fix for this problem, as every time I boot my laptop this message comes up. Is there any way to get rid if it? Thanks.
7
votes
2answers
16k views

How do I enable multiple cores in my virtual enviroment?

I've installed Ubuntu in a virtual enviroment using Oracle VM VirtualBox Manager and it works great. However I'd like to enable multiple cores - as seen in the image below my Windows machine has 2 ...
2
votes
0answers
35 views

Reserving a core for system processes to prevent wedging

I am working on a multi-core machine (running Ubuntu 14.04 server), where some programs seem to use up all resources causing wedging. Is there a way I can reserve one core for the os processes to ...
20
votes
5answers
15k views

Multi-Core Compression tools

What compression tools are available in Ubuntu that can benefit from a multi-core CPU.
4
votes
2answers
2k views

avconv on multiple threads

Is it possible to run jobs on multiple processor or threads to speed up avconv? Is there a feature in progress, if not I wonder why?
3
votes
0answers
95 views

One of my two cores suddenly flatlines at zero percent

I've been using Ubuntu for about three months, and twice now the first core of my dual-core laptop suddenly flatlined at zero percent for no apparent reason, while the second one seemed unaffected. ...
5
votes
1answer
2k views

Ubuntu server 11.04 recognize only 1 core instead of 4

I searched for other questions and googled a lot but I didn't find a solution for solving this problem. I have Ubuntu Server 11.04 64bit installed on my Dell Poweredge with Intel Xeon X5450. The ...
12
votes
7answers
15k views

For better performance should I install 32-bit or 64-bit?

I don't know much about 32 bit and 64 bit. I had been using 32 bit and it's crashed (not working properly and i don't know how to recover) question here..... and i don't have backup and i run on 3.2 ...
4
votes
2answers
10k views

No ACPI support for my PC, what can I do?

On my new PC something is wrong with ACPI support under Linux. I have to boot it with acpi=off and nolapic. Also it detects only one CPU core (this annoys me the most) and won't shut down completely, ...
1
vote
2answers
185 views

How to limit users to N cores?

I have an SSH server where users login to do various tasks. The problem is I have 4 cores, and one user is running tasks on 4. How can I limit the number of cores any given user can use? This is not ...
0
votes
1answer
180 views

Force to use specific number of cores

I am using Ubuntu 13.10 on laptop that has Intel i5 (4 logical cores). Question: Can I force Ubuntu to use only one or two cores? Explanation: I want to test how my application performance scales ...
2
votes
1answer
370 views

Why does /proc/cpuinfo say “cpu cores: 2” on an AMD FX-4100 Quad-Core Processor

I'm trying to figure out how to interpret my /proc/cpuinfo. I've got an AMD FX-4100 quad-core and cpuinfo gives, as it should, 1 'physical id', 4 'core id's and 4 'siblings', but why does 'cpu cores' ...
-1
votes
1answer
4k views

Ubuntu 12.04 LTS iso for 64-bit intel i7-4700MQ quad core laptop [duplicate]

I have a Lenovo Ideapad with Intel i7-4700MQ processor. Which Ubuntu iso should I download for installation?
1
vote
1answer
362 views

How disable one core from dual core machine

I have a Toshiba Satellite L300 dual core laptop. Due to some problem I need to disable one core. How to do this in Ubuntu 12.10?
0
votes
1answer
5k views

How to enable VT-X to adjust the processor of a vm

I am using Oracle VM VirtualBox. I've been trying to adjust the process of my Virtual Machine but the slider of the Processor on the Processor tab is disabled. As far as I know, VT-x should be enabled ...
1
vote
1answer
4k views

Display clock frequency per core using Conky [duplicate]

I am using Conky to display a lot of information of my system. I managed to display the load percentage per core. But I do not know how to display the clock frequency of each core. What I have now is: ...
1
vote
1answer
363 views

How can I create ISOs quickly using all 16 cores of a Parallella board?

I have a large video collection (over 900 disks). Using Handbrake to rip to .mp4 is painfully slow, especially when ripping BRD. I found another solution that will play back ISOs, but I want to be ...
4
votes
1answer
3k views

How do I enable all four cores on my Toshiba P70-A notebook? (only one enabled now)

I recently noticed my computer is highly sluggish (recent install of Kubuntu 13.04 by the way). I have a Toshiba Satellite P70-A PSPLPC-01Y007 laptop with an Intel i7 quad-core, 16 GB of ram. It ...
0
votes
1answer
430 views

Logical / Physical processors supported [duplicate]

Can anyone tell me the maximum number of logical as well as the maximum number of physical processors supported in the latest release of Ubuntu? In the documentation online, I've found the 8 ...
1
vote
2answers
830 views

Any way for ubuntu to use more than one core of i7 cpu on my Asus laptop?

Newly installed ubuntu 11.10 on a new Asus U46E laptop. /proc/cpuinfo correctly identified the cpu but shows only one core: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : ...
2
votes
2answers
1k views

CPU high temperature 12.10 while high CPU usage

I have a problem with high temperature of processor while running applications that use all 8 cores of processor with load of close to 100% during the all running time. And the running time for those ...
1
vote
1answer
2k views

How to enable concurrency in grub2?

While reading about speeding up Linux, particularly the boot process I found that concurrency is suggested for multiple core PC's. It appears that this setting was easily achieved in legacy GRUB, ...
1
vote
1answer
375 views

Firefox multi-core when opening a list of bookmarks?

Is there a way to configure Firefox to use all available cores when opening a list of bookmarks? For example, if I open a list of 10 bookmarks in one go, I would like Firefox to use all 4 cores ...
0
votes
2answers
380 views

my internet is suddenly slow

im running Ubuntu 12.10 and it works like a charm... but one problem, when i updated my software everything seemed OK until i noticed that my internet speed very slow. i had about 5-6 MBPS but it ...
6
votes
1answer
2k views

Assign more than 1 CPU/core to a process

I lost the password to open a PDF file I need to access, so I installed pdfcrack with the hope to recover my password. Actually it's one month that pdfcrack is running but I still am waiting for the ...
6
votes
1answer
4k views

How to fix that only one out of four cores of my CPU is detected?

I have an Acer Aspire M5640/M3640 PC, featuring a Intel Core 2 Q8200 (Quad-core) processor running Ubuntu 12.04. Now it seems to only recognize just one CPU core. lscpu outputs: Architecture: ...
3
votes
1answer
6k views

How well does Ubuntu work with a dual CPU computer?

I am thinking of getting a dual Intel Xeon machine, each CPU is a quad core. Will Ubuntu utilize both processors, especially with both being quad core, optimally? Wanting to do Video editing and ...
3
votes
1answer
2k views

Why is Ubuntu detecting only one processor core?

My processor is Intel P6100 which is a Dual Core processor. When I do cat /proc/cpuinfo this is what get varun@varun-K52F:~$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu ...
0
votes
2answers
1k views

Why I get non-symmetric usage of CPU on multicore PC

CPU: AMD Phenom II X4 955 Ubuntu 11.10 amd64 I launch some application that use only one core and when I look at cpu-load graphic in gnome-system-monitor I found that all of my four CPU's loaded not ...
7
votes
1answer
1k views

Why does Ubuntu 12.10 only see 8 cores?

In our lab we just bought a new machine with two 8-cores Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz processors which also support Hyper-Threading. I would expect Ubuntu to see 32 processing units, ...
0
votes
0answers
23 views

Why only 1 cpu is used instead of 2 on ubuntu 11.10 [duplicate]

Possible Duplicate: Why does Ubuntu 12.10 only see 8 cores? I recently install Ubuntu 11.10 64 bit on a workstation with 2 Xeon E5620 but only 1 cpu, with 4 core and can be hyperthreading ...
30
votes
4answers
19k views

Is Ubuntu optimized for multicore CPUs?

Does Ubuntu make use of multicore CPUs (as Windows 7 is said to do)? In other words, is it multitasking optimized so that users will take benefit of 4+ core processors?
11
votes
2answers
3k views

Does Ubuntu support Core Parking?

Core parking is a new feature that introduced in Windows 7 to get better Battery performance . Depending on the resource use of the operating system it may park one or multiple cores of a multi-core ...
2
votes
1answer
834 views

Is there an application indicator for CPU usage by core?

I love System Load Indicator (indicator-multiload), but it doesn't reflect the usage of the individual CPU cores, just the overall CPU usage. Sometimes I'll have an application max out a single core ...
0
votes
1answer
347 views

How can I enable second core of my Intel Atom in my Dell mini 910?

I did the following trick: http://junkypc.com/enable-dual-core-processors-ubuntu/ But after that when I was trying to shutdown the system it seemed like shutting down forever so I had to use forced ...
5
votes
1answer
5k views

Using quad core, but only 1 CPU entry in `/proc/cpuinfo`? Is SMP running on my computer?

I just upgraded my system and did a clean install of Ubuntu when I did (Installed Oneiric Ocelot from the CD last week but yesterday upgraded to 12.04 LTS). I have an i7 920 (quad core with ...
2
votes
1answer
1k views

New Ubuntu install, only see's 1 core of my dual core CPU

Brand new install of 11.10 64-bit Ubuntu. While getting my conky script up and running I kept seeing the error Conky: attempting to use more CPUs than you have! and that was weird because Ive never ...
6
votes
2answers
4k views

How do I assign different CPU cores to different processes?

I'm using Ubuntu Server Edition 11.10 and I have two extremely CPU intensive programs running on the same core. Neither of these processes were programmed for multi-core processing. Is there a way I ...
1
vote
1answer
708 views

MacBookPro 7,1 can only see one cpu

On a MacBookPro 7,1 running ubuntu 11.10, System monitor only sees 1 core (instead of 2). cat /proc/cpuinfo | grep 'cpu cores' also gives: cpu cores : 1 I followed this guide and added ...
1
vote
1answer
1k views

How to disable processor drivers

I have a Toshiba laptop that freezes when I plug in the AC Power cord. But I remedy this in Windows 7 by going into Safe Mode then Control Panel > Device Manager > Processors and disable both of ...
2
votes
3answers
4k views

Is mplayer multi-threaded?

There's a post in mplayer's site from 2011-03-26, i.e. March 26, saying that mplayer is multi-threaded. So this is several months before Oneiric was released. Does this mean that the stock mplayer I ...
8
votes
2answers
5k views

What should I rely on lbzip2 or pbzip2?

As bzip2 claims to compress best (in size), I decided to use it. The working server can offer 24 (virtuals) CPUs (4 real X5650 @ 2.67GHz) - and thus I decided to look for parallel variants. Using ...