ARM first announced big.LITTLE processing on 2011, and since then we’ve seem several mobile processors providing two CPU clusters with “big” cores such as Cortex A15 or A57 and “LITTLE” core such as Cortex A7 and A53 to optimize performance and power consumption. With its latest Helio X20 (MT6797), Mediatek brings TINY.medium.huge processing with the first mobile processor using three CPU clusters, although a 3-level architecture has also been used before in Dhanush wearables SoC.
The three clusters are divided as follows:
- TINY – Four ARM Cortex A53 core @ up to 1.4 GHz for best power efficiency
- medium – Four ARM Cortex A53 cores @ up to 2.0 GHz for a good performance / power balance
- huge – Two ARM Cortex A72 cores @ up to 2.5 GHz for maximum performance
All three clusters are linked together and the memory bus via Mediatek Coherence System Interconnect (MCSI). Mediatek claims their tri-cluster processor consumes less than big.LITTLE processing across all performance demand conditions, and compared their solutions to 2-gear and 3-gear cars with the latter leading to better fuel efficiency.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.