cpu - Read For Learn

Difference between core and processor

A core is usually the basic computation unit of the CPU – it can run a single program context (or multiple ones if it supports hardware threads such as hyperthreading on Intel CPUs), maintaining the correct program state, registers, and correct execution order, and performing the operations through ALUs. For optimization purposes, a core can also … Read more

Write-back vs Write-Through caching?

The benefit of write-through to main memory is that it simplifies the design of the computer system. With write-through, the main memory always has an up-to-date copy of the line. So when a read is done, main memory can always reply with the requested data. If write-back is used, sometimes the up-to-date data is in … Read more

What is a clock cycle and clock speed?

The speed of a computer processor, or CPU, is determined by the Clock Cycle, which is the amount of time between two pulses of an oscillator. Generally speaking, the higher number of pulses per second, the faster the computer processor will be able to process information. The clock speed is measured in Hz, typically either megahertz … Read more

What does CPU usage mean?

What does it mean, when a CPU usage of a core is 100 percent? Does it mean that a process has peaked the maximum possible performance of a core (with vectorization) or does it mean that the CPU is doing as many cycles as the core clock is? Also, if it is 100 percent, can … Read more

Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX AVX2

What is this warning about? Modern CPUs provide a lot of low-level instructions, besides the usual arithmetic and logic, known as extensions, e.g. SSE2, SSE4, AVX, etc. From the Wikipedia: Advanced Vector Extensions (AVX) are extensions to the x86 instruction set architecture for microprocessors from Intel and AMD proposed by Intel in March 2008 and … Read more