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Difference between revisions of "samsung/microarchitectures/m2"
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| − | {{samsung title| | + | {{samsung title|Exynos M2|arch}} |
{{microarchitecture | {{microarchitecture | ||
|atype=CPU | |atype=CPU | ||
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|speculative=Yes | |speculative=Yes | ||
|renaming=Yes | |renaming=Yes | ||
| + | |stages=14 | ||
|decode=4-way | |decode=4-way | ||
|isa=ARMv8 | |isa=ARMv8 | ||
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|successor link=samsung/microarchitectures/m3 | |successor link=samsung/microarchitectures/m3 | ||
}} | }} | ||
| − | '''Mongoose 2''' ('''M2''') is | + | '''Exynos Mongoose 2''' ('''M2''') is the successor to the {{\\|Mongoose 1}}, a [[10 nm]] [[ARM]] microarchitecture designed by [[Samsung]] for their consumer electronics. |
== Process Technology == | == Process Technology == | ||
| Line 38: | Line 39: | ||
! Compiler !! Arch-Specific || Arch-Favorable | ! Compiler !! Arch-Specific || Arch-Favorable | ||
|- | |- | ||
| − | | [[GCC]] || <code>-mcpu=exynos- | + | | [[GCC]] || <code>-mcpu=exynos-m1</code> || <code>-mtune=exynos-m1</code> |
|- | |- | ||
| [[LLVM]] || <code>-mcpu=exynos-m2</code> || <code>-mtune=exynos-m2</code> | | [[LLVM]] || <code>-mcpu=exynos-m2</code> || <code>-mtune=exynos-m2</code> | ||
| Line 45: | Line 46: | ||
== Architecture == | == Architecture == | ||
=== Key changes from {{\\|Mongoose 1}} === | === Key changes from {{\\|Mongoose 1}} === | ||
| − | * [[10 nm|10nm 10LPE process]] (from [[14 nm]]) | + | * [[10 nm|10nm (10LPE) process]] (from [[14 nm]]) |
| + | * Larger [[ROB]] (100, up from 96) | ||
{{expand list}} | {{expand list}} | ||
| Line 78: | Line 80: | ||
*** 16 B/cycle/CPU bandwidth | *** 16 B/cycle/CPU bandwidth | ||
| − | + | The M2 TLB consists of dedicated L1 TLB for instruction cache (ITLB) and another one for data cache (DTLB). Additionally there is a unified L2 TLB (STLB). | |
* TLBs | * TLBs | ||
| Line 93: | Line 95: | ||
** 64-entry µBTB | ** 64-entry µBTB | ||
** 64-entry return stack | ** 64-entry return stack | ||
| + | ** 8K-entry L2 BTB | ||
== Core == | == Core == | ||
| − | The M2 core | + | The M2 core is almost identical to the {{\\|M1}}. |
== All M2 Processors == | == All M2 Processors == | ||
Latest revision as of 13:50, 21 February 2019
| Edit Values | |
| Mongoose 2 µarch | |
| General Info | |
| Arch Type | CPU |
| Designer | Samsung |
| Manufacturer | Samsung |
| Introduction | February 23, 2017 |
| Phase-out | 2018 |
| Process | 10 nm |
| Core Configs | 4 |
| Pipeline | |
| OoOE | Yes |
| Speculative | Yes |
| Reg Renaming | Yes |
| Stages | 14 |
| Decode | 4-way |
| Instructions | |
| ISA | ARMv8 |
| Cache | |
| L1I Cache | 64 KiB/core 4-way set associative |
| L1D Cache | 32 KiB/core 8-way set associative |
| L2 Cache | 2 MiB/cluster 16-way set associative |
| Succession | |
Exynos Mongoose 2 (M2) is the successor to the Mongoose 1, a 10 nm ARM microarchitecture designed by Samsung for their consumer electronics.
Contents
Process Technology[edit]
M2 was fabricated on Samsung's first generation 10LPE (Low Power Early) process.
Compiler support[edit]
| Compiler | Arch-Specific | Arch-Favorable |
|---|---|---|
| GCC | -mcpu=exynos-m1 |
-mtune=exynos-m1
|
| LLVM | -mcpu=exynos-m2 |
-mtune=exynos-m2
|
Architecture[edit]
Key changes from Mongoose 1[edit]
- 10nm (10LPE) process (from 14 nm)
- Larger ROB (100, up from 96)
This list is incomplete; you can help by expanding it.
Block Diagram[edit]
Core Cluster Overview[edit]
(Cluster identical to Mongoose 1)
Individual Core[edit]
Memory Hierarchy[edit]
- Cache
- L1I Cache
- 64 KiB, 4-way set associative
- 128 B line size
- per core
- Parity-protected
- 64 KiB, 4-way set associative
- L1D Cache
- 32 KiB, 8-way set associative
- 64 B line size
- per core
- 4 cycles for fastest load-to-use
- 16 B/cycle load bandwidth
- 16 B/cycle store bandwidth
- 32 KiB, 8-way set associative
- L2 Cache
- 2 MiB, 16-way set associative
- 4x banks (512 KiB each)
- Inclusive of L1
- 22 cycles latency
- 16 B/cycle/CPU bandwidth
- 2 MiB, 16-way set associative
- L1I Cache
The M2 TLB consists of dedicated L1 TLB for instruction cache (ITLB) and another one for data cache (DTLB). Additionally there is a unified L2 TLB (STLB).
- TLBs
- ITLB
- 256-entry
- DTLB
- 32-entry
- STLB
- 1,024-entry
- Per core
- ITLB
- BPU
- 4K-entry main BTB
- 64-entry µBTB
- 64-entry return stack
- 8K-entry L2 BTB
Core[edit]
The M2 core is almost identical to the M1.
All M2 Processors[edit]
| List of M2-based Processors | ||||||||
|---|---|---|---|---|---|---|---|---|
| Main processor | Integrated Graphics | |||||||
| Model | Family | Launched | Arch | Cores | Frequency | Turbo | GPU | Frequency |
| Count: 0 | ||||||||
Facts about "Exynos M2 - Microarchitectures - Samsung"
| codename | Mongoose 2 + |
| core count | 4 + |
| designer | Samsung + |
| first launched | February 23, 2017 + |
| full page name | samsung/microarchitectures/m2 + |
| instance of | microarchitecture + |
| instruction set architecture | ARMv8 + |
| manufacturer | Samsung + |
| microarchitecture type | CPU + |
| name | Mongoose 2 + |
| phase-out | 2018 + |
| pipeline stages | 14 + |
| process | 10 nm (0.01 μm, 1.0e-5 mm) + |