Hardware :: I5-650 Cpu Only Showing One Core?
Oct 23, 2010
This is weird. New box, intel i5-650 cpu w/ 8 gb ram. Installed 10.04, did updates from a local mirror, and box is *fast*.
But /proc/cpuinfo only reports one core.
The output of free indicates that all 8gb are recognized, uname reports SMP.
Using Ubuntu 10.04.
Code:
root@sj-desktop:~# dpkg -l | grep linux-image
ii linux-image-2.6.32-25-generic-pae 2.6.32-25.45 Linux kernel image for version 2.6.32 on x86
ii linux-image-generic-pae 2.6.32.25.27 Generic Linux kernel image
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Nov 3, 2010
I just loaded F14 on an old Dell Dimension 3000 with a dual core processor but only one is showing. Here's the output from top:
processor: 0
vendor_id: GenuineIntel
cpu family: 15
model: 4
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Apr 1, 2011
i am running gigabyte GA-M68M-S2P and AMD sempron 2.7. the problem is when i try to run dual core. it will boot and run for 2mins then it crashes. single core runs perfect.
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Mar 27, 2011
I have a command line OCR program called OCR Shop XTR (Vividata corp) that I am using on a system with a 6-core AMD chip. I changed the bios so that the 6-cores were activated, but htop shows me that while the program is running, I am only getting activity on one core (the program maxes out the one core with consistent usage between 97% and 100%).
I have read that many programs are not written to take advantage of multiple core cpu's. However, I am just hoping that there is some way to get this program to take advantage of the extra cores. Does anyone know of a way to invoke programs from the command line which would spread the workload out among additional cores?
Here is the output of uname -a:Linux linux 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 i686 athlon i386 GNU/LinuxAnd here is the output for one of the cores from cat /proc/cpuinfo:processor : 5
vendor_id : AuthenticAMD
cpu family : 16
model : 10
model name : AMD Phenom(tm) II X6 1100T Processor
stepping : 0
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Feb 14, 2010
Just a quick question. Does Kubuntu Karmic support core 2 E8500 out of the box or do you need the SMP kernel?
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Oct 31, 2010
Is there any Linux API that will let me control on what core will a thread run? If not, do I have to use assembly language?
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Sep 7, 2011
I have now installed Wheezy on two different hard drives and in each case it seems only one CPU of my dual core CPU computer is recognized. System Monitor, Gkrellm and lscpu show just one when prior to the new install the old Wheezy showed both CPU's. I have put the hard drive into two other computers with dual core CPU's and all show just one CPU.
Interestingly System Profiler and Benchmark (hardinfo?) > Devices > Processors now show a large amount of processor infomation when with the old Wheezy I would only see both CPU's listed and nothing else.
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May 15, 2010
I've a Compaq CQ61 laptop, and i noticed that one of the cores is always at 100%.
I didn't check the duration of the battery but surely it will "eat" my battery in a hurry
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Mar 14, 2011
I recently read in a forum that by default the Linux kernel only activates one of two cores in a dual core processor. Searching online gave one option to find out and that was the mpstat command. I therefore ran the command and got the following output.As the result says, it shows only 1 cpu. I was wondering what I could do to activate both cores in my machine, and whether doing so was going to cause me any problems.
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Apr 27, 2010
Assume someone bind a particular process to a particular CPU core(In multi core machine) by using sched_setaffinity() like functions. Then how we can get that process running core id and CPU core utilisation of that process on that running CPU core(Pragmatically or by a Linux command)?.
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May 20, 2009
I have created a virtual machine of a system running Fedora Core 4 and I need to upgrade it to Fedora Core 10. Based on what I have read, it iis possible so I started theupgrade process. I get an error message saying that /dev/hda6 (my root paritition does not exist) even though it does.
Does the installer need to read a label from /etc/fstab? I executed tune2fs -L / /dev/hda6 amd ,and added LABEL=/ for the corresponding entry for fstab. but the FEDORA CORE 10 is still giving the same problems for the installation process. Should I upgrade to an intermediate verson like Fedora Core 7 first?
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Mar 26, 2011
I've a program that launches new processes, and wait for them to die before it exits. So, for example, my program is a process, and it launches 3 more processes, and when the 3 child processes end, it will exit.
As you see, at end of the example, the program used a total number of 4 processes.
1 - Now, I'm running this program in a CPU with 4 cores. This means that the program used each core for each process?
2 - How can I know which core the program used?
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Oct 7, 2009
I want to generate core dump files from my program when it crashes. Its a pretty big process and has about 10-11 threads in it.I have followed the documentation to enable core dump by setting ulimit to unlimited etc. I quickly tried "A demo program creating a core dump" from the following webpage, which succeeds in Segfault and dumping a core file in the directory that I configured.However, I tried running my original program and caused it to crash. I did this by making calls to kill(), raise() or the same null pointer access as shown in the webpage above. In each case, my program crashed but did not generate a core dump file. Am I missing something?My program is in C++ and my environment is Redhat 9.0 (kernel 2.4.20)
Going through the "Why do I NOT get a core dump?" section on the same webpage as above, I can see two potential problems. One - there are issues with the suid/sgid (bullet # 6). I am not able to change any settings with suid because my system does not contain either /proc/sys/fs/suid_dumpable or /proc/sys/kernel/suid_dumpableTwo, my program has threads in it and the bullet # 8 is the problem.
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Jan 27, 2010
We have a small cluster of 20 HP systems, all running CentOS 5.3 in an NFS-root environment. Half are quad-socket, quad-core Xeon E7340 @ 2.40GHz (total 16 cores), the other half are 8-socket, quad-core Opteron 8354 (total 32 cores). All systems have a Mellanox Infiniband adapter ("Mellanox Technologies MT25418 [ConnectX VPI PCIe 2.0 2.5GT/s - IB DDR / 10GigE] (rev a0)")
With kernel 2.6.18-128.1.6.el5, infiniband works fine on all systems.
With the update to kernel 2.6.18-164.11.1.el5 (and both types of node running the same NFS-root image), the 16-core Xeons still work fine. Infiniband no longer works on the 32-core Opterons. Specifically, either the ib0 interface fails to appear, or it does appear but when configured with an IP address, doesn't actually work. In either case, loading the IB kernel modules takes a long time, but I haven't instrumented the load script yet to see which module, if any, is at fault. More errors listed below.
However, if I tweak the BIOS of the 32-core systems to reduce the per-socket core count to 2 (so effectively 8-socket, dual-core, down to a total of 16 available cores), Infiniband starts working again. Putting it back to 32-cores makes it fail. Booting the older kernel makes it work again. In summary: old kernel, IB works on all systems. Newer kernel, IB only works on 16-core systems.
Updating the IB firmware from 2.5.0 to 2.7.0 (latest available) doesn't help. I also did a full 'yum update' to make sure that libmlx4, openibd all other associated packages were up-to-date. Doesn't help either.
Some errors that appear on 32-core nodes:
ib_query_port failed (-16) for mlx4_0
ib_query_port failed (-16) for mlx4_0
mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16)
mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16)
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Jun 8, 2011
Only Single core active on quad core AMD when acpi is active.with acpi=offuname -aLinux dvip4 2.6.32-30-server #59-Ubuntu SMP Tue Mar 1 22:46:09 UTC 2011 x86_64 GNU/Linux
Code:
cat /proc/cpuinfo
processor : 0
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Mar 14, 2010
i download the rpm package of gcc .
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Aug 7, 2011
Having one issue with evolution not showing html websites showing up in email like verizon sending a promo. I have gone to edit, preferences, mail preferences, html messages and have always load images from the internet chosen. I have also added sender to contacts. Even if I right click message and tell it to dload images it doesn't.
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Dec 12, 2008
I would like to know when usb inserted, its showing cant mount when i clicked details its showing bad blocks in beginning , and smething in /dev/sd6. Can i knw why usb drive cant be mounted automatically , even if its set to do so, and to cope the error mentioned above
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Apr 18, 2011
When I try to connect a projector to my laptop (already running) and hit the fn+f7 (the designated button for switching screen), nothing happens. I see "no source found" on projector screen and my laptop screen works perfectly. Now if I restart the laptop with the projector connected, I see all the intial booting messages on the projector screen (not on my laptop), then the gnome login screen appears on both the projector screen and laptop (when the login screen appears on laptop it looks like it has lower resolution than my usual laptop resolution). But immediately after I log in, my laptop screen goes blank, and projector screen becomes the only active screen.
If I restart without the projector, again all normal operation on laptop screen is restored.
I feel like I am missing some very silly options. Any help is appreciated.
Here is the output of xrandr when the laptop is connected:
Code:
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Jan 12, 2011
I am in school for my CIS degree and the book I am using this session covers Windows XP and Fedora Core 4. I am having trouble finding & downloading Fedora Core 4. My question is: Is there a big enough difference between Fedora Core 4 and Fedora Core 14 that I would not be able to use 14 instead of 4?
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Nov 3, 2009
Is it possible to back port the centos5 USB HID core driver version 2.6 back to centos4 USB HID core driver version 2.0?
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Jul 28, 2015
I have a debian system with the following version, see below. My problem is that one one single core of 4 it's running 100% all the time and i cant seem to find out why. The load is also high(load average: 0.91, 0.75, 0.40) because of this. This keeps happening even after reboots.
root@Cyberdyne:~# hostnamectl
Static hostname: Cyberdyne
Icon name: computer-desktop
Chassis: desktop
Machine ID: af90d9838fc14929818d8d52719fc2ae
Boot ID: a3ef416a7fb4404ca4b9c122bdb1145a
Operating System: Debian GNU/Linux 8 (jessie)
Kernel: Linux 3.16.0-4-amd64
Architecture: x86-64
Distributor ID: Debian
Description: Debian GNU/Linux 8.0 (jessie)
Release: 8.0
Codename: jessie
IMAGE : [URL] ....
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Jul 14, 2009
Is there a fix for Firefox crashing with core 11?
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May 5, 2011
I own an Athlon II X4, with 4 physical cores, and opensuse 11.4 x86_64 is only recognizing 1 of them. Although, when i disable ACPI from the BIOS, i get all 4 cores showing on cpuinfo.
Code:
Linux version 2.6.38.4-2-desktop (geeko@buildhost) (gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux) ) #1 SMP PREEMPT 2011-04-26 17:30:28 +0200
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May 2, 2010
I have a dual-core computer that I just upgraded to lucid lynx. when looking at the system monitor, one of the cpu's is always running at 100% and its not always the same one. Is this normal or do I have an issue? I would really like some info.
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May 27, 2010
I have just installed Ubuntu 10.04 on a new Dell. I have an Intel Core 2 Quad processor and I have noticed that one of the cores, sometimes 2, is almost always running at 100%. It is not always the same core and it switches between cores if I use the computer for a while.I searched the forums and came up with some similar problems and tried typing in the command "top" into terminal, but as a relatively new user I don't know what to do with that information.The only one that jumps out at me is that Root says it is using 100% CPU, which I didn't notice on other peoples posts.Also, is it bad for my computer if one of the cores runs so high?
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Apr 27, 2011
Why does ubuntu only see a single core on my quad-core cpu? All cores are enabled in the bios.
Here are some details about my hardware...
$ dmesg | grep Phenom
[ 0.812775] powernow-k8: Found 1 AMD Phenom(tm) II X4 810 Processor processors (1 cpu cores) (version 2.20.00)
$ uname -a
Linux xyz 2.6.32-31-generic-pae #61-Ubuntu SMP Fri Apr 8 20:00:13 UTC 2011 i686 GNU/Linux
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Jan 4, 2009
I'm running ubuntu 8.10. Most stuff seems to run smoothly and with no breaking problem but use of grub with ubuntu is different than with Core 9.
whereis grub produces /usr/sbin/grub and /usr/lib/grub and /etc/grub.d/grub
(this as su or just ordinary user) files that do exist are owned by root and in group root (why I tried as su and ordinary me). I seem to be blind to menu.1st.
Last distro was core 9 with which I did nor have this problem.
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Apr 20, 2010
I know this is probably a totally ludicrous question, but is there a way to have Linux run on one processor and half the RAM in the background while Windows is in the foreground... and switch between them at will?
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Jan 11, 2010
I've got a few simple questions that have been bugging me for days:
What do we need slack64 for? What are the differences and advantages?
Is it true that EVERY core 2 duo processor is both 32 and 64 bit?
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