![]() import reįor line in open('/proc/cpuinfo'). Here's a python based approach - it also suggests ways to disable it if needed. Each different item in every column has an unique ID # The following is the parsable format, which can be fed to other grep -m 1 cpu cores /proc/cpuinfo cpu cores : 4 To specifically answer your question you tell how many cores you have by multiplying the number of cores you have per socket by the number of sockets you have. Lscpu -p gives a csv format output for easy program parsing. We can verify the hyperthread like so: $ cat /sys/devices/system/cpu/cpu0/topology/thread_siblings_list Each CORE has a sibling hyperthread (For example CORE=0 contains CPU 0,16. grep -m 1 'cpu cores' /proc/cpuinfo cpu cores : 4 To specifically answer your question you tell how many cores you have by multiplying the number of cores you have per socket by the number of sockets you have. However, this file does not exist on ESXi hosts. This Perl version deals with those correctly: perl -F: -alpe 's/./'F 0' : 'F 1'/' /proc/cpuinfo This will split the line on : into the F array ( -F sets the character to split on and -a turns on automatic splitting into F) and print each side quoted. We have 16 physical cores (CORE=0 through 15). On an ESX host, you can check cpuinfo by looking at the flags line in the / proc/cpuinfo file. ![]() In the above example, we have 2 NUMA sockets (SOCKET=1 or 2). I tested with centos XENSERVER vm, Ubuntu, and Openfiler (rpath)ĬPU NODE SOCKET CORE L1d:L1i:L2:元 ONLINE May be a little messy, I'm a beginner at scripting though. Returns a list containing objects of type Linux::Cpuinfo::Cpu corresponding to the CPUs discovered in this system. I believe this will work on all platforms, and will tell you if its CPU is capable, and if it is enabled. If Įcho "Does not look like you have HT Enabled"Įcho "HT is also not Possible on this server"Įcho "This server is HT Capable, However it is Disabled"Įcho "testing # " Physical/g | grep -v ^$ | sort | uniq | wc -l) Phycore=$(cat /proc/cpuinfo | egrep "core id|physical id" | tr -d "\n" | sed s/physical/ CPUs with hyperthreading generally have multiple ALUs and can dispatch multiple instructions per cycle. Nproc=$(grep -i "processor" /proc/cpuinfo | sort -u | wc -l) I found this to be the easiest and less code way, which also worked on all my test environments. The last method works but not dual socket servers and VMs tested on Xenserver where it doesn’t display Physical CPU, since there are none. The above examples show if the CPU is capable of HT, but not if it is being used. To install Linux::Proc::Cpuinfo, copy and paste the appropriate command in to your terminal.
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