Linux view machine CPU core number

CPUTotal core = physical CPU number * the number of cores per physical CPU.
Total logical CPU = physical CPU number * the number of cores per physical CPU * the number of super threads.

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<pre>View CPU information (model)[root@AAA ~] cat /proc/cpuinfo grep name cut cut -f2 -d: uniq -c24 InteL (R) Xeon (R) CPU E5-2630 0 @ 2.30GHzLook at the number of physical CPU[root@AAA ~] cat /proc/cpuinfo| grep

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<p>Let’s look at what CPU stands for.</p>
<p>Many physical CPU, CPU communicate through the bus, the efficiency is relatively low, as follows:</p>
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Multi-core CPU, different cores communicate through L2 cache, storage and peripherals communicate with CPU via bus, as follows:

Multi-core hyperthreading, each core has two logical processing units, two cores share a core of resources, as follows:

From what I’ve done above, it turns out that I’m using a CPU with 2 * 6 = 12 cores, each with two hyperthreads, so I have 24 logical CPUs.

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