Gracemont (microarchitecture)

Gracemont is a microarchitecture for low-power processors used in systems on a chip made by Intel, and is the successor to Tremont. Like its predecessor, it is also implemented as low-power cores in a hybrid design of the Alder Lake, Raptor Lake and Raptor Lake Refresh processors.

Design

Gracemont is the fourth generation out-of-order low-power Atom microarchitecture, built on the Intel 7 manufacturing process.
The Gracemont microarchitecture has the following enhancements over Tremont:

Level 1 cache per core:
* eight-way-associative 64KB instruction cache
* eight-way-associative 32KB data cache
New On-Demand Instruction Length Decoder
Instruction issue increased to five per clock
Instruction retire increased to eight per clock
Execution ports there are now 17
Reorder buffer increased to 256 entries
Improved branch prediction
Support for AVX, AVX2, FMA3 and AVX-VNNI instructions
2 or 4MB shared L2 cache per 4-core cluster. Alder Lake family has 2MB. Higher-end Raptor Lake family with Raptor Cove has 4MB, while Lower-end Raptor Lake family with Golden Cove has 2MB.

Technology

System on a chip architecture
3D tri-gate transistors
Thermal design power
* 10W desktop processors
* 6W mobile processors

List of Gracemont processors

The microarchitecture is used as the efficient cores of the 12th generation of Intel Core hybrid processors, the 13th generation of Intel Core hybrid processors and the 14th generation of Intel Core hybrid processors. It's also used in the Alder Lake-N line-up as the only core cluster, intended for low-power applications.