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We are using the smallest padding boundary (8 bytes), which isn't smaller than the Memory Controller Read/Write Size We get best performance in 100G when the Packing Boundary is a multiple of the Maximum Payload Size. Its related to inefficient chopping of DMA packets by PCIe, that causes more overhead on bus. So driver is helping by making the starting address alignment to be MPS size. We will try to determine PCIE MaxPayloadSize capabiltiy and set IngPackBoundary based on this value. If cache line size is greater than MPS or determinig MPS fails, we will use cache line size to determine IngPackBoundary(as before). Signed-off-by: Arjun Vynipadath <arjun@chelsio.com> Signed-off-by: Casey Leedom <leedom@chelsio.com> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.