Synchronization of DMA transfers for large number of queues
US11221979B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2020 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Nov 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06N3/063
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Synchronization of a plurality of aggregate DMA transfers on large number of DMA queues can be achieved using a small number of semaphores. One or more semaphores from M semaphores can be assigned to each aggregate DMA transfer based on round-robin or another suitable method. Each aggregate DMA transfer can comprise N DMA transfers, where M is smaller than N. Each DMA transfer can be assigned to one of the assigned one or more semaphores from the M semaphores. Each DMA engine of N DMA engines can increment the assigned semaphore after performing a respective DMA transfer of the N DMA transfers. A computational engine waiting on completion of a certain aggregate DMA transfer can perform an operation based upon the one or more assigned semaphores reaching respective threshold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.