03-07-2012
Question on /proc/cpuinfo
Hi,
I wanted to understand what exactly /proc/cpuinfo shows?
We have a machine with following specification...
(2x) Intel Xeon 6-core processors
So, ideally it shouls have 12processors, but the output on /proc/cpuinfo shows 24 processors.
Can someone please explain how this is calculated.
Thanks!
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Here is a chance for Linux users to easily compare Linux CPU info and some meaningless BOGOMIPS. Everyone who is running Linux is welcome to:
cat /proc/cpuinfo
and post the results.
Here is the results for www.unix.com:
processor : 0
vendor_id : AuthenticAMD
cpu family... (182 Replies)
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LEARN ABOUT CENTOS
hwlocality_intel_mic
Intel Xeon Phi (MIC) Specific Functions(3) Hardware Locality (hwloc) Intel Xeon Phi (MIC) Specific Functions(3)
NAME
Intel Xeon Phi (MIC) Specific Functions -
Functions
static inline int hwloc_intel_mic_get_device_cpuset (hwloc_topology_t topology , int idx , hwloc_cpuset_t set)
static inline hwloc_obj_t hwloc_intel_mic_get_device_osdev_by_index (hwloc_topology_t topology, unsigned idx)
Detailed Description
Function Documentation
static inline int hwloc_intel_mic_get_device_cpuset (hwloc_topology_t topology, int idx, hwloc_cpuset_tset) [static]
Get the CPU set of logical processors that are physically close to MIC device whose index is idx. Return the CPU set describing the
locality of the MIC device whose index is idx.
Topology topology and device index idx must match the local machine. I/O devices detection is not needed in the topology.
The function only returns the locality of the device. If more information about the device is needed, OS objects should be used instead,
see hwloc_intel_mic_get_device_osdev_by_index().
This function is currently only implemented in a meaningful way for Linux; other systems will simply get a full cpuset.
static inline hwloc_obj_t hwloc_intel_mic_get_device_osdev_by_index (hwloc_topology_ttopology, unsignedidx) [static]
Get the hwloc OS device object corresponding to the MIC device for the given index. Return the OS device object describing the MIC device
whose index is idx. Return NULL if there is none.
The topology topology does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote
host. I/O devices detection must be enabled in the topology.
Note:
The corresponding PCI device object can be obtained by looking at the OS device parent object.
Author
Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code.
Version 1.7 Sun Apr 7 2013 Intel Xeon Phi (MIC) Specific Functions(3)