I have intel celeron d 3.06ghz processor . Now I am using 32 bit Ubuntu and I wish to upgrade to 64 bit Ubuntu if my processor allow. My doubt is how to identify 64 bit processor with cat /proc/cpuinfo command. it shows
clflush size : 64
Does my processor support 64 bit OS ?
I'm using Intel i5-2430M processor which is a dual core processor, but the output of /proc/cpuinfo shows four cores. Why? Is is because of hyper-threading?
If yes, is there any way I can see the actual number of cores?
Also, how can I see the sizes of L1 and L2 caches?
Output of /proc/cpuinfo: http://pastebin.ubuntu.com/1206427/
When I bought my Lenovo Thinkpad 520, it had Windows installed. I promptly cleaned that out and installed Fedora 16. I recently visited the /proc/cpuinfo and, much to my surprise, discovered that it has four CPUs listed (0-3). I do not remember asking for extra CPUs when I got it, believeing I was getting only a single processor. Could this be a mistake in the cpuinfo file?
For some reason /proc/cpuinfo is only displaying one core from a 16 core processor. However hwinfo --cpu shows the 16 cores. I have ACPI enable in the bios and I have cleared the noacpi tags out of the grub.cfg file.
I've tried to decide processor affinity rule for my applications according to /proc/cpuinfo , My redhat Linux showes
processor : 0 to 47 , means server has 48 processor unit
physical id : 0 to 3 , means server has 4 cpu sockets
cpu cores : 6 , means each socket has 6 cores
siblings : 12 , means each core has 2 hyperthreads
So totally , this server has 4 * 6 * 2 = 4
I have a server with an Intel Core i7 processor (4 cores). If I view processor activity in Task Manager I see that there are 8 cores.
I am extracting two pieces of information from the following file: /proc/cpuinfo, that I need to merge into one report.
The first command:
grep -i processor /proc/cpuinfo | awk '{print $1$2,$3}'
yields:
processor: 0
processor: 1
processor: 2
processor: 3
The second command:
grep -i "model name" /proc/cpuinfo | awk '{print $4, $5, $6, $7, " ", $8, $9, $10, $11}'
yields:
Intel(
can any one please clarify the difference between actual no of processors and CPU cores.
in my case i am having Intel Xeon® Processor E5620 as per intels product page: its having
# of Cores 4
# of Threads 8
and cat /proc/cpuinfo |grep processor|wc -l is showing 16
so what is this 16 showing here?.
I am planning to virtualize this machine with xen to 4 vms,each with 4 cpu.So
My box is using intel i7 with hyperthreading enabled. So it has 8 logical processors. I am confused about their numbering.
I checked the /proc/cpuinfo file, the processor id, core id, and siblings do not AT ALL give any information about the REAL topology of the processors (e.g., the processor ids range from 0 to 7, and all the core ids are 0).
Can anybody explain this to me?
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