Getting a per thread CPU statistics
For a quick answer use SysInternal’s Process Explorer. Double click on a process to open the details dialogue. the threads tab gives a sortable list of all threads including context switch delta and CPU time.
central-processing-unit
What creates CPU I/O wait but no disk operations?
NFS can do this, and it wouldn’t surprise me if other network filesystems (and even FUSE-based devices) had similar effects.
High CPU load but top processes in top all around 0%
I think this bug is your case. From what I see from the output, you have enough memory (note the cached 14 GB or so), no I/O issues, but you have xen-related processes running. This make me think it is a bug.
KVM and virtual to physical CPU mapping
A virtual CPU equates to 1 physical core, but when your VM attempts to process something, it can potentially run on any of the cores that happen to be available at that moment. The scheduler handles this, and the VM is not aware of it. You can assign multiple vCPUs to a VM which allows … Read more
Disable CPU cores in bios?
With the HP ProLiant G5 and newer (G6, G7, Gen8) servers (e.g. DL380, ML370, etc. – Anything after the Intel 5400-series CPU’s), it is possible to disable half of the cores available to the server. This is a BIOS switch labeled “Processor Core Disable” with options “All Processors Enabled” and “Disable One-Half of cores per … Read more
Balancing RAM when using multiple CPUs
The HP ProLiant DL360 G7 server (and other Nehalem-and-newer CPU systems) have a set of memory DIMM population guidelines. Can you share what’s currently populated and what your final RAM amount/goal is? This is documented primarily in the Quickspecs for the system, but I’ll try to give some specific guidelines. HP also has an interactive … Read more
Hyper-V Processor Limitations
A vCPU can only be mapped to a single physical CPU. You can’t take 4 physical CPUs and make a single vCPU that’s 4x faster; it’s just not how it works. Hyper-V is limited to assigning 4 vCPUs to a VM (last I checked). If you need significant CPU power, go physical, there’s no sense … Read more
Getting CPU information from command line in Mac OS X [server]
Lots of people have already mentioned system_profiler, so I’ll just list some other commands I’d recommend for “looking around” a Mac OS X system: top -u -s5 My favorite command for seeing what’s going on. Shows processes sorted by CPU usage, updated every 5 seconds (I find the default of 1 second to be too … Read more
x86, i386, i686, amd64, i5, i7, archtecture, processor confusion [closed]
The term architecture covers a lot more than just the processor. There is a lot of other hardware components that are crucial to an OS kernel. The first example that comes to my mind is the interrupt controller, which is separate from the processor, but depending on actual model may be put inside the same … Read more
Proper way of interpreting system load on a 4 core 8 thread processor
Not surely, but mostly on 1.00*n_cpu. The load means the following: if there are multiple processes on a single-cpu system, they are running seemingly parallel. But it is not true. What practically happens: the kernel gives 1/100th second to a process, and then breaks its running with an interrupt. And gives the next 1/100th second … Read more