The multi-core tag has no wiki summary.
5
votes
3answers
3k 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 ...
0
votes
1answer
47 views
Running one OS per core [closed]
I'm interested in using a COTS board like the Wandboard for a project. On one hand I'd like to use something like Ubuntu for user interaction, sounds, TCP/IP stuff, etc. But I also need an RTOS like ...
0
votes
2answers
74 views
Ubuntu X86 or X64 with laptop specs? [closed]
Hi there i just wondering wich one would i choose? this are mi laptop specs:
Toshiba Satellite L305-S5937
Intel Pentium Processor T3400 (Dual Core)
4GB PC6400 DDR2 800MHz SDRAM
320GB HDD (5400rpm, ...
1
vote
2answers
375 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
902 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
75 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
72 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
0answers
115 views
Ubuntu thinks my laptop only has one core!
I recently moved /boot to a different partition (first partition on my disk, sda1), no problems booting or anything.
But now I noticed gnome-system-monitor only shows one CPU bar. It used to show two ...
3
votes
2answers
209 views
Multi-Core Compression tools
What compression tools are available in Ubuntu that can benefit from a multi-core CPU.
0
votes
2answers
101 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
542 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 ...
3
votes
1answer
385 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: ...
0
votes
0answers
130 views
cpufreq indicator multi-core
My PC has a 6 core CPU (AMD FX-6300), and I want to keep all cores at maximum speed.
Earlier in Ubuntu 10.04 LTS I had a CPU scaling (indicator) which offered the possibility to change the frequency ...
0
votes
0answers
219 views
Ubuntu 12.04 uses single cpu on Intel Core 2 Duo MacBook
I have Intel Core 2 Duo MacBook5,2 with 64bit Ubuntu 12.04 installed. The problem is it uses only one cpu. gnome-system-monitor and /proc/cpuinfo display only one cpu running.
$ /proc/cpuinfo
...
2
votes
1answer
458 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 ...
0
votes
0answers
124 views
C or assembly code to find current cpu core speed
How can my application efficiently determine the following information peroidically while it executes:
1: current speed of each of the 8 CPU cores.
2: which core the code is currently executing on.
...
3
votes
1answer
997 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
457 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 ...
1
vote
2answers
4k 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, ...
3
votes
1answer
1k views
How to change maximum number of cores?
It says in How many maximum CPUs does Ubuntu support by default?
that there is a maximum number of 8 cores supported by default in Ubuntu 12.04 Desktop/Server 32-Bit. What is the way to increase the ...
7
votes
1answer
843 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 ...
0
votes
0answers
138 views
Sempron 145 core unlocking
Call me a cheapskate looking for performance, but I have a Sempron 145 processor that has been unlocked to an Athlon II X2 4450e with a GIGABYTE GA-990FXA-UD3 motherboard, but only one of the two ...
28
votes
4answers
8k 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
720 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 ...
1
vote
1answer
412 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
159 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 ...
9
votes
6answers
7k 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 ...
3
votes
1answer
2k 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 ...
3
votes
1answer
1k 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 ...
2
votes
1answer
764 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
1k 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
603 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
439 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 ...
1
vote
3answers
1k 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 ...
2
votes
2answers
2k 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 ...
3
votes
2answers
440 views
Understanding machine config, multiprocessor or multi-core or both?
I want to know how many processors my ubuntu box has and if they are multicore. I did
cat /proc/cpuinfo
and I see something like this
processor : 0
vendor_id : GenuineIntel
cpu family : ...
7
votes
1answer
1k views
Do newer Ubuntu releases benefit from multicore processors at boot time?
I've read the Upstart features and it says nothing about concurrency.
I also read old advices to set CONCURRENCY value in the /etc/init.d/rc
But there is a comment:
Specify method used to enable ...
5
votes
3answers
4k views
Can mencoder use multiple cores, or is there another aud-vid encoder which can?
I'm looking for a good audio-video encoder which can utilize all cores of a multi-core CPU.
I've tried mencoder, but I can't see a "multi-core" option, and it appears to be using only one core at ...
3
votes
2answers
276 views
Old kernel and recent CPU
this is my question, I'd like to install Ubuntu 10.04 LTS on a laptop equipped with Intel Core i7 processor: does Lucid kernel support the features of this cpu?
Many thanks.
2
votes
2answers
610 views
My processor is not detected intel core 2 duo
My processor is not detected intel core 2 duo
When I type
$uname -m -p
I get this
i686 unknown
I have Ubuntu 10.10 netbook remix
but the cat /proc/cpuinfo gives right identification of ...
