CPU (Central Processing Unit)

A CPU (Central Processing Unit) is the processor chip that fetches, decodes and executes the instructions of programs. It performs arithmetic, logic and control operations and directs data between memory, storage and other hardware.

Why it matters

CPU speed and design determine how quickly a machine runs general-purpose work such as compiling code, serving web requests or handling many tasks at once. Servers that sit at constant high CPU load respond more slowly, which shows up as higher latency and eventually timeouts.

Performance depends on more than raw frequency: core count, cache size, architecture and power limits all matter.

Example

On Linux you can inspect the processor with:

$ lscpu | grep -E 'Model name|^CPU\(s\)|Thread'
Model name:          Example CPU 3.0GHz
CPU(s):              8
Thread(s) per core:  2

This machine reports 8 logical CPUs, which could be 4 physical cores with 2 threads each.

Common misconceptions

• A higher GHz number always means a faster CPU. Architecture and core count often matter more.
• The CPU and the GPU do the same job. A CPU handles general tasks, while a GPU is built for massive parallel work.
• More cores speed up every program. Software must be written to use them.

Related

• CPU core
• Clock speed
• GPU
• Thermal throttling

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.