Comment by iscoelho
9 hours ago
That is not true unfortunately. io_uring only avoids the userspace copy/switch. There are many other copies in the Linux userspace network stack.
9 hours ago
That is not true unfortunately. io_uring only avoids the userspace copy/switch. There are many other copies in the Linux userspace network stack.
What do you mean by “userspace network stack” when we’re talking about io_uring? That’s a contradiction. Unless you mean extra memcpy’s within the kernel network stack, but when talking about the buffer you supply I don’t believe that’s true - your data generally gets directly DMA’ed into the device because the buffer you supplied is pinned and can’t be released until the second CQE is delivered. It would be helpful if you clarified.