3 ms·
reading directly from a PCIe device, such as an NVMe flash, can actually be faster than caching things in RAM first. That's not true though, because the PCIe d
by wmf 1y ago
reading directly from a PCIe device, such as an NVMe flash, can actually be faster than caching things in RAM first.
That's not true though, because the PCIe device DMAs into RAM anyway.
- nine_k 1y agoNo, it can DMA straight into L3 cache, as mentioned in the article. See https://www.intel.com/content/www/us/en/io/data-direct-i-o-technology.html https://www.intel.com/content/www/us/en/io/data-direct-i-o-t...