Standards for NoC: What can we gain?

Transcription

1 Standards for NoC: What can we gain? Axel Jantsch Royal Institute of Technology, Stockholm March 2006

2 March 2006 Standards for NoC 1 What Kind of Standards Informal Standards are a set of assumptions shared and agreed upon in a community Industrial standards are set by companies that guess right Formal standards (IEEE, ISO,...) are usually preceded by an informal consensus

3 March 2006 Standards for NoC 2 Standards vs. Creativity

4 March 2006 Standards for NoC 2 Standards vs. Creativity

5 March 2006 Standards for NoC 2 Standards vs. Creativity +

6 March 2006 Standards for NoC 2 Standards vs. Creativity + =

7 March 2006 Standards for NoC 3 Standardizing Interfaces and Protocols Pins Data link Transactions End-to-end communication services Functionality + performance contracts

8 March 2006 Standards for NoC 3 Standardizing Interfaces and Protocols We gain: Pins Data link Transactions End-to-end communication services Functionality + performance contracts Reuse of IPs Reuse or verification Outsourcing and specialization Separation of Physical design issues Communication design Component design Verification System design

9 March 2006 Standards for NoC 4 Standardization of Design Methodologies Reuse of concepts Methodologies Methods Design languages Tools Reuse, separation of concerns and specialization are driving forces

10 March 2006 Standards for NoC 5 We can build on top of standards Assuming we have standard communication services, we build on top of them:

11 March 2006 Standards for NoC 5 We can build on top of standards Assuming we have standard communication services, we build on top of them: Design tools: System performance analysis Formal communication verification Allocation, mapping, and scheduling etc.

12 March 2006 Standards for NoC 5 We can build on top of standards Assuming we have standard communication services, we build on top of them: Design tools: System performance analysis Formal communication verification Allocation, mapping, and scheduling etc. New services: Dynamic resource allocation and management Dynamic power management On-line testing and diagnostics Off-chip communication services etc.

13 March 2006 Standards for NoC 6 Standardization of Performance Metrics

14 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks

15 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks Packet level and Transaction level

16 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks Packet level and Transaction level Unloaded and Loaded case

17 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks Packet level and Transaction level Unloaded and Loaded case Various temporal and Spatial distributions of traffic

18 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks Packet level and Transaction level Unloaded and Loaded case Various temporal and Spatial distributions of traffic Best effort and Guaranty services

19 March 2006 Standards for NoC 6 Standardization of Performance Metrics Benchmark applications and Stochastic micro-benchmarks Packet level and Transaction level Unloaded and Loaded case Various temporal and Spatial distributions of traffic Best effort and Guaranty services Sizes between 16 and 200 nodes

20 March 2006 Standards for NoC 7 Unloaded Case Packet Transaction Read 16/32/64b Write 16/32/64b Open Stream Close Stream Message 1/4/16/32B Delay Bandwidth Energy Area

21 March 2006 Standards for NoC 8 Loaded Case Packet Transaction Read 16/32/64b Write 16/32/64b Open Stream Close Stream Message 1/4/16/32B D 1 D 2 D 3 D n Sustained bandwidth Energy /byte 1 10 i of all packets p: delay(p) mindelay(p) D i D 1 : 90%, D 2 : 99%, D 3 : 99.9%, D n : 100%

22 March 2006 Standards for NoC 9 Temporal Distributions Uniform Bursty traffic according to the B-Model: B 0.2, B 0.3, B traffic Packet number/total packet number cycle cycle

23 March 2006 Standards for NoC 10 Spatial Patterns Uniform Uniform with locality Bit Rotate Bit Complement Hot Spot Fork-Join Pipeline Uniform

24 March 2006 Standards for NoC 11 Spatial Patterns Uniform Uniform with locality Bit Rotate Bit Complement Hot Spot Fork-Join Pipeline Bit Rotate

25 March 2006 Standards for NoC 12 Spatial Patterns Uniform Uniform with locality Bit Rotate Bit Complement Hot Spot Fork-Join Pipeline Bit Complement

26 March 2006 Standards for NoC 13 Spatial Patterns Uniform Uniform with locality Bit Rotate Bit Complement Hot Spot Fork-Join Pipeline Hot Spot

27 March 2006 Standards for NoC 14 Spatial Patterns Uniform Uniform with locality Bit Rotate Bit Complement Hot Spot Fork-Join Pipeline Fork Join Pipeline

28 March 2006 Standards for NoC 15 Size Number of nodes: 8, 16, 25, 40, 60, 80, 100, 150, 200

29 March 2006 Standards for NoC 16 Data Points for Stochastic Micro Benchmarks Temporal distribution: 4 Spatial patterns: 12 Unloaded case: ((14 4)+ Loaded case: ((14 6)) Size: 9 = 60480

30 March 2006 Standards for NoC 17 D 1 versus network size in Nostrum D1,uniform 5% D1,uniform 10% D1,uniform 15% D1,uniform 20% normalized delay number of nodes

31 March 2006 Standards for NoC 18 D 2 versus network size in Nostrum D2,uniform 5% D2,uniform 10% D2,uniform 15% D2,uniform 20% 2.1 normalized delay number of nodes

32 March 2006 Standards for NoC 19 D 3 versus network size in Nostrum D3,uniform 5% D3,uniform 10% D3,uniform 15% D3,uniform 20% 2.8 normalized delay number of nodes

33 March 2006 Standards for NoC 20 D n versus network size in Nostrum Dn,uniform 5% Dn,uniform 10% Dn,uniform 15% Dn,uniform 20% 4 normalized delay number of nodes

34 March 2006 Standards for NoC 21 Summary Standards are crucial and complementary to innovative research Let s standardize performance metrics