the core of a computer’s operating system is called the

the core of a computer's operating system is called

the core of a computer’s operating system is called the

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The …………….. is the computer program that is the core of a computers operating system.​


The Core of an Operating System is the Kernel


Every computer has a CPU, or a central processing unit. This processes the information in your computer and is the main component of your computer. Any instruction that you give to your computer gets processed by this and it executes the command.

Now, the CPU is made up of cores, which is what processes the information. When the CPU is given a instruction, it divides up the work and gives it to the cores so the CPU can process the information more faster and easily, which is why some CPU’s have up to 22 cores.

Basically, cores are what make up the CPU and process the information

Every CPU, inside of a computer has atleast one core.


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The cores are responsible for doing all of the calculations.

The more cores you have, the more heat is produced, but also the more calculations are done.

As an example, most computers 10 years ago had 2 cores. The were slow.

Most modern computers have 4, 6 or 8 cores. allowing for much faster calculations.

Servers found in businesses can even have up to 32 cores in 1 single CPU, allowing for crazy taste calculations, in a small small space.


The usage of core

The term “core” has two usages. The historical usage refers to magnetic random access memory. Small ferrite beads were strong on wires and their magnetic polarization recorded 0 or 1. It was called “core memory.” Even after magnetic cores were replaced by electronic RAM, a copy of a computer’s memory (typically used for debugging) was called a “core dump.”

In modern usage, a “core” is a processing unit on a multi-processor computer chip.

The term core is used for multi-core processors.

Let’s understand it.

Every computer has a circuit which keeps on switching between 0 and 1 alternatively as long as the computer is running. Mostly this circuit is built inside CPU and we know it as system clock.

The system clock is used by Control Unit (CU) which synchronizes all devices and their operations inside a computer. The speed of system clock is measured in GHz these days and is also known as the speed of a processor.

Now the fastest system clock used in microprocessors these days is somewhere near 5GHz. While it’s possible to build more fast system clocks (to improve speed of processor operations), it is not practical due to many physical limitations.

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Here comes the idea of having more processors in one CPU where each core is a separate processor inside a CPU. We know such CPU as multi-core processors like Intel i3, i5 and i7 or Intel Quad-core etc.

A multi-core processor allows us multi-tasking which gives us the effect of as if we have a very fast processor installed on our computer.

Core in a modern computer system

It depends on what ‘core’ you’re talking about. In a modern processor a core represents an implementation of a microarchitecture. and its ISA (like x86, ARM, POWER etc) at the hardware level through billions of transistors. What it does is process information. Instructions go through the pipeline which consists of a ‘front end’ which involve processes and stages such as branch prediction, instruction prefetching and decode/allocation queues.

The second part is the ‘execution engine’ which usually consists of an out-of-order execution unit which has multiple execution ports. Those ports contain all the integer and vector ALUs, AGUs, FPUs, FMAs and load/store units. Depending on the microarchitecture, a number of those ports can work together in a ‘fused’ state to perform intensive calculations which involve the use of vector or SIMD instructions (AVX2/512 and SSE). Outside of that pipeline you also have some cache (usually sram) which comes in two flavours, L1 and L2 on most single-core processors.


In a modern processor configuration you will find multiple cores and L3 and L4 caches along with memory. display or PCIe controllers. Those extra caches are generally last level caches (LLC) which are significantly larger (up to 128MB for L4) but have slower read/write rates and higher latencies. All cores get their respective slices or portion of the L3 cache and communicate through a high bandwidth interconnect (eg, Intel’s ring bus or AMD’s infinity fabric). The L3 cache usually also includes a copy of both the core’s L1 and L2 caches while the L4. (a separate die) acts like a buffer for the integrated graphics and can also store copies of L3, L2 and L1 caches if desired.

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But you also have other dedicated ‘cores’, some of which are programmable, others fixed-function. For a modern GPU, cores (stream processors or execution units) are very different and usually densely packed into larger modular units called shader modules. which also feature texture mapping and render output units. Those cores are geared towards raw compute power through a large number of integer. and floating point ALUs which are optimised for single or double-precision workloads.

Outside of the CPU/GPU, there are also fixed function cores which are specifically designed to handle other dedicated tasks. like video encoding and decoding, hardware accelerated cryptography, digital audio, image signal processing, telephony/modem, wireless comms (WiFi or BT) and neural networks/AI. Those cores are much simpler and operate independently. they come with their own memory, caches and sometimes run a tiny embedded real-time OS.


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