4 ms·
DMAing as opposed to what?
by yusyusyus 9mo ago
DMAing as opposed to what?
- loeg 9mo agoIssuing extremely slow PCIe reads? GP probably meant “all” rather than “most.”
- yusyusyus 9mo agoyep that makes more sense.
- saidnooneever 9mo agoi think he means simply the cpu speed bottleneck doesnt apply as it related to dma which doesnt 'transfer data' via the cpu directly. its phrased a bit weird.
- imtringued 9mo agoLetting the CPU burn cycles by accessing memory mapped device memory instead of using DMA like in the good old days? What even is this question?
- wtallis 9mo ago> accessing memory mapped device memory instead of using DMA like in the good old days That's not actually an option for NVMe devices, is it? The actual NAND storage isn't available for direct memory mapping, and the only way to access it is to set up DMA transfers.