IP Library › Granted Patent US 12,217,147
Granted Patent B2
US 12,217,147 · App. 17/764,453 · Granted Feb 4, 2025

Advanced wavelet filtering for accelerated deep learning

Inventors: Michael Morrison (Sunnyvale, CA); Michael Edwin James (San Carlos, CA); Sean Lie (Los Altos, CA); Srikanth Arekapudi (Los Altos Hills, CA); Gary R. Lauterbach (Los Altos, CA)
Assignee: Cerebras Systems Inc.
G06N3/04G06F9/3887G06F9/3888G06F13/42G06F17/148G06N3/063G06N3/08
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Quick Facts
Patent No.
US 12,217,147
App. No.
17/764,453
Filed
Apr 11, 2022
Granted
Feb 4, 2025
Kind
B2
Art Unit
2184
USPC
706/15
Abstract

Techniques in wavelet filtering for advanced deep learning provide improvements in one or more of accuracy, performance, and energy efficiency. An array of processing elements comprising a portion of a neural network accelerator performs flow-based computations on wavelets of data. Each processing element comprises a compute element to execute programmed instructions using the data and a router to route the wavelets in accordance with virtual channel specifiers. Each processing element is enabled to perform local filtering of wavelets received at the processing element, selectively, conditionally, and/or optionally discarding zero or more of the received wavelets, thereby preventing further processing of the discarded wavelets. The wavelet filtering is performed by one or more configurable wavelet filters operable in various modes, such as counter, sparse, and range modes.

Claims (53)

1. A method comprising:

communicating packets between a plurality of processing elements coupled via a fabric, wherein each of the communicated packets comprises a respective color field and a respective type field;

receiving, from the fabric, a particular one of the communicated packets in a particular one of the processing elements, wherein the color field of the particular packet is a particular color value and the type field of the particular packet is a particular type value indicating a mutually exclusive one of a plurality of types;

managing a wavelet filter of the particular processing element, wherein the wavelet filter is enabled to retain state comprising a filtered color; and

queueing information of the particular packet to enable execution, by the particular processing element, of an instruction that uses the queued information, wherein the queueing is conditional based on one or more queueing criteria, a first one of the queueing criteria is that the particular color value and the filtered color are different, and a second one of the queueing criteria is that the particular type value indicates a particular one of the types.

2. A method comprising:

communicating packets between a plurality of processing elements coupled via a fabric, wherein each of the communicated packets comprises a respective color field and a respective type field;

receiving, from the fabric, a particular one of the communicated packets in a particular one of the processing elements, wherein the color field of the particular packet is a particular color value and the type field of the particular packet is a particular type value indicating a mutually exclusive one of a plurality of types;

managing a wavelet filter of the particular processing element, wherein the wavelet filter is enabled to retain state comprising a filtered color; and

updating a counter, wherein;

the updating is conditional based on one or more updating criteria, a first one of the updating criteria is that the particular color value and the filtered color are identical, and a second one of the updating criteria is that the particular type value indicates a particular one of the types,

the updating is responsive to the receiving, and

the state further comprises the counter.

3. A method comprising:

communicating packets between a plurality of processing elements coupled via a fabric, wherein each of the communicated packets comprises a respective color field and a respective type field;

receiving, from the fabric, a particular one of the communicated packets in a particular one of the processing elements, wherein the color field of the particular packet is a particular color value and the type field of the particular packet is a particular type value indicating a mutually exclusive one of a plurality of types;

managing a wavelet filter of the particular processing element, wherein the wavelet filter is enabled to retain state comprising a filtered color;

queueing information of the particular packet to enable execution, by the particular processing element, of an instruction that uses the queued information, wherein the queueing is conditional based on one or more queueing criteria and a first one of the queueing criteria is that the particular color value and the filtered color are different, and a second one of the queueing criteria is that the particular type value indicates a particular one of the types; and

updating a counter, wherein:

the updating is conditional based on one or more updating criteria and a first one of the updating criteria is that the particular color value and the filtered color are identical, and a second one of the updating criteria is that the particular type value indicates the particular type,

the updating is responsive to the receiving, and

the state further comprises the counter.

4. The method of claim 3 , wherein the state further comprises a filter mode indicator enabled to indicate a mutually exclusive one of a plurality of filter operating modes and a third one of the queueing criteria is that the filter mode indicator indicates a particular one of the filter operating modes.

5. The method of claim 3 , wherein the state further comprises a filter mode indicator enabled to indicate a mutually exclusive one of a plurality of filter operating modes and a third one of the updating criteria is that the filter mode indicator indicates a particular one of the filter operating modes.

6. The method of claim 3 , wherein the state further comprises a filter mode indicator enabled to indicate a mutually exclusive one of a plurality of filter operating modes, a third one of the queueing criteria is that the filter mode indicator indicates a particular one of the filter operating modes, and a third one of the updating criteria is that the filter mode indicator indicates the particular filter operating mode.

7. The method of claim 4, claim 5, or claim 6 , wherein the filter operating modes comprise a counter mode, a sparse mode, and a range mode.

8. The method of claim 3 , wherein the state further comprises a limit and a third one of the queueing criteria is that the counter is one of less than the limit and equal to the limit.

9. The method of claim 1 or claim 3 wherein the particular packet comprises a particular index value, the state further comprises a range specifier, and a third one of the queueing criteria is that the particular index value is in accordance with a range specified by the range specifier.

10. The method of claim 9 , wherein the types comprise a control type and a data type.

11. The method of claim 2 or claim 3 , wherein the types comprise a control type and a data type.

12. The method of claim 2 or claim 3 , wherein the wavelet filter is a first wavelet filter, the state is first state, the filtered color is a first filtered color, and a second wavelet filter of the particular processing element is enabled to retain second state comprising a second filtered color.

13. The method of claim 12 , wherein the managing is a first managing and further comprising a second managing the second wavelet filter.

14. The method of claim 13 , wherein the updating is a first updating, the counter is a first counter, and the updating criteria is a first updating criteria; and further comprising a second updating a second counter, wherein the second updating is conditional based on one or more second updating criteria and a first one of the second updating criteria is that the particular color value, and the second filtered color are identical, and further wherein the second updating is responsive to the receiving.

15. The method of claim 2 or claim 3 , wherein the managing is a first managing, the wavelet filter is a first wavelet filter, the state is first state, the filtered color is a first filtered color, the updating is a first updating, the counter is a first counter, and the updating criteria is a first updating criteria; and further comprising:

a second managing a second wavelet filter of the particular processing element, wherein the second wavelet filter is enabled to retain second state comprising a second filtered color; and

a second updating a second counter, wherein the second updating is conditional based on one or more second updating criteria and a first one of the second updating criteria is that the particular color value and the second filtered color are identical, and the second updating is responsive to the receiving.

16. The method of claim 1 or claim 3 , wherein the particular packet comprises a particular index value, the state further comprises a range specifier, and a third one of the queueing criteria is that the particular index value is in accordance with a range specified by the range specifier.

17. The method of claim 1, claim 2, or claim 3 , wherein one or more configuration registers of the particular processing element comprise one or more portions of the state.

18. The method of claim 17 , wherein at least one of the configuration registers is modifiable by a load control register instruction that is executable by the particular processing element.

19. The method of claim 17 , wherein at least one of the configuration registers is memory-mapped and modifiable by at least one memory store instruction that is executable by the particular processing element.

20. The method of claim 17 , wherein at least one of the configuration registers is modifiable via a system interface of the particular processing element.

21. The method of claim 1 or claim 3 , wherein the execution by the particular processing element is implemented at least in part by a compute element that the particular processing element comprises.

22. The method of claim 3 , further comprising, transmitting to the fabric a copy of the particular packet, as one of the communicated packets, to another one of the processing elements, wherein the transmitting is irrespective of the queueing criteria and irrespective of the updating criteria.

23. The method of claim 1 or claim 3 , wherein the queued information comprises an integer data value and the instruction comprises an integer arithmetic instruction.

24. The method of claim 1 or claim 3 , wherein the queued information comprises a floating-point data value and the instruction comprises a floating-point arithmetic instruction.

25. The method of claim 1 or claim 3 , wherein the queued information comprises a plurality of values and the instruction comprises a single instruction multiple data instruction.

26. The method of claim 1, claim 2, or claim 3 , wherein the particular color value identifies one communication pathway of a plurality of communication pathways.

27. The method of claim 26 , wherein a plurality of fabric ports couples the particular processing element to the fabric and the identified communication pathway is implemented at least in part by transport via a particular fabric port of the plurality of fabric ports.

28. The method of claim 1, claim 2, or claim 3 , wherein the particular processing element comprises a compute element enabled to perform the execution and the compute element comprises at least a portion of the wavelet filter.

29. The method of claim 1, claim 2, or claim 3 , wherein the particular processing element comprises a router enabled to forward the particular packet to another of the processing elements and the router comprises at least a portion of the wavelet filter.

30. The method of claim 1, claim 2, or claim 3 , wherein the particular processing element comprises a compute element and a router, the compute element is enabled to perform the execution, and the router is enabled to forward the particular packet to the compute element.

31. The method of claim 1, claim 2, or claim 3 , wherein the particular packet comprises a data portion indicating one or more of an activation of a neural network, a partial sum of activations of a neural network, an error of a neural network, a gradient estimate of a neural network, and a weight of a neural network.

32. The method of claim 1, claim 2, or claim 3 , wherein a single wafer comprises the processing elements and the fabric.

Assignments (2)
SECURITY INTEREST Recorded Jun 18, 2026
From: CEREBRAS SYSTEMS INC.
To: MORGAN STANLEY SENIOR FUNDING, INC., AS THE COLLATERAL AGENT
Reel/Frame 075845/0844 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 29, 2022
From: MORRISON, MICHAEL; JAMES, MICHAEL EDWIN; LIE, SEAN; AREKAPUDI, SRIKANTH; LAUTERBACH, GARY R.
To: CEREBRAS SYSTEMS INC.
Reel/Frame 060932/0272 →
Continuity (2)
Provisional Application 62915745 · Oct 16, 2019
Related Publication 20220343136A1 · Oct 27, 2022
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