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Discussion Groups | TMS320C55x | data_transfer in omap,which is best bettween dsp-dma-mmu and arm-mpui
Technical discussions about the TI C55x DSPs (including the c5501, c5502, c5503, c5507, c5509, c5510 and OMAP5910).
data_transfer in omap,which is best bettween dsp-dma-mmu and arm-mpui - garlordembed - Jan 24 0:27:00 2005
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hi,all when we transfer data from system memory to dsp sram. which is the best choice for largest througout (1)dsp initiate transfer, it use dma and its mmu to access system memory. (2)arm initiate transfer, it use dma and its mpui to access dsp sram. thank you! |
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Re: data_transfer in omap,which is best bettween dsp-dma-mmu and arm-mpui - Jeff Brower - Jan 24 11:15:00 2005
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Garlor Dembed > when we transfer data from system memory to dsp sram. > which is the best choice for largest througout > (1)dsp initiate transfer, it use dma and its mmu to access system > memory. > (2)arm initiate transfer, it use dma and its mpui to access dsp > sram. Which core is busier? DMA cycles normally "steal" from CPU cycles -- or even block CPU mem cycles in some cases -- so I might guess whichever core has lower workload should handle DMA. -Jeff |
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