Definition
Advanced RISC Machine (ARM) processors are a set of low-power, optimum-performance microprocessors developed by ARM Ltd.
The processors are built on a reduced instruction set computing (RISC) design, allowing them to perform tasks with fewer instructions than complex instruction set computing (CISC) processors such as x86 CPUs.
Because of their compact size and power effectiveness, they are typically utilized in Internet of Things (IoT) devices, mobile devices, and integrated systems.
Examples of ARM Processors
- Apple M1: Apple’s tailored ARM-built processor powers its MacBook Pro, Mac mini, and MacBook Air models.
- NVIDIA Tegra: An ARM-based System-on-a-Chip (SoC) used in IoT devices, automotive systems, and gaming gadgets.
- Qualcomm Snapdragon: A sequence of ARM-based processors utilized in several tablets and smartphones.
ARM Processors vs. x86 Processors
ARM processors are popular for their small size and power efficacy, making them ideal for mobile-integrated apps. On the other hand, x86 processors offer higher performance while consuming more power, making them suitable for servers and desktops.
ARM Processors Pros & Cons
Pros
- Small form factor
- Power-efficient
- Scalable performance
Cons
- Has reduced performance than legacy x86 processors
- Limited compatibility with high-end x86 processors
Tips for Using ARM Processors
Select ARM processors for devices with minimal power consumption, including IoT devices, tablets, and smartphones. Moreover, you can consider utilizing x86-based processors for resource-intensive activities like video editing or gaming.
ARM Processor Features
- Multiprocessing system: ARM processors are developed for multiprocessing designs, where multiple processors work together to process data. The initial AMP processor, ARMv6K, could accommodate four CPUs with its hardware.
- Thumb-2 technology: It was launched in 2003 and utilized to create variable-length instruction suites. This system extends the 16-bit instructions of the original Thumb technology to 32-bit instructions. Additionally, it performs better compared to the preceding Thumb technology.
- Firmly coupled memory: The ARM processor’s memory is strongly coupled, resulting in fast response times. Furthermore, low latency might be used when cache memory is unpredictable.
- Pipelining: Instruction is processed in parallel using pipelines. The instructions are broken down and deciphered in a single pipeline stage. The channel evolves gradually to escalate the rate of processing (throughput).
- Memory management: The ARM processor has a control segment, including a Memory Protection Unit and a Memory Management Unit. These management systems are essential for effective memory management.
- One-Cycle Execution time: The ARM processor is enhanced for every instruction on the CPU. Every instruction has a predetermined length, which permits time to retrieve future instructions before executing the current ones. ARM has a Clock Per Instruction (CPI) of one cycle.
- A large number of registers: ARM processors use many registers to prevent numerous quantities of memory interactions. The records include addresses and local memory storage data for all tasks.