It will regard 'anything' that can take care of one process at a time as a processor. For an x86-based processor or an 圆4-based processor, the F. The cpuinfo report abstracts out the fact that each physical processor (one of several cpu's on a die) can expand its computing powers by tech feats such as multithreading. The MHz or Speed column specifies the speed, in MHz, of the processor, if it is available. The Manufacturer column specifies the processor manufacturer.
The CP column indicates the processor number. So, what this will end up doing is just increase the number of context switches, possibly also adding a performance degradation. The cpuinfo extension command can be used when performing local kernel debugging. You also get the wrong answer, as you do by grepping /proc/cpuinfo.
In this case, if you base your number of threads off grepping lscpu you take another dependency (on the util-linux package), which isn’t needed.
#Osx proc cpuinfo software
$ docker run -cpuset-cpus=0-2 -rm=true -it amazonlinux:2Īs you can see, nproc here gets the right bit of information, so if you’re wanting to do a calculation such as “Please use up to the maximum available CPUs” as a parameter to the configuration of a piece of software (such as how many threads to run), you get the right number.īut what if you use some of the other common methods? $ /usr/bin/lscpu -p | grep -c "^"īash-4.2# /usr/bin/lscpu -p | grep -c "^"īash-4.2# grep -c 'processor' /proc/cpuinfo $ docker run -cpuset-cpus=0-1 -rm=true -it amazonlinux:2 What’s a simple example? Containers! Did you know that when you invoke docker to run a container, you can easily limit how much CPU the container can use? In this case, we’re looking at the -cpuset-cpus parameter, as the -cpus one works differently.
#Osx proc cpuinfo code
So, what does that actually mean? Well, just because the computer some code is running on has a certain number of CPUs (and here I mean “number of hardware threads”) doesn’t necessarily mean that you can spawn a process that uses that many. Print the number of processing units available to the current process, which may be less than the number of online processors. dmidecode Command There are a number of ways you can get information about the processor on your Linux system. If you look at the man page, it’s even the very first sentence: lscpu command output explanation Other commands to check CPU information in Linux 1. There’s something really quite subtle about how the nproc utility from GNU coreutils works.
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