A: http://en.wikipedia.org/wiki/Top_post Q: Were do I find info about this thing called top-posting? A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? A: No. Q: Should I include quotations after my reply? http://daringfireball.net/2007/07/on_top On Thu, Jul 12, 2018 at 10:27:37PM +0800, bing zhu wrote: > as for memcpy ,kernel is faster than user ,might because schedule ,can i try to > make user as fast as kernel ? You can bind a specific CPU to your userspace task, and have it only run that program and not get interupted at all for anything. That would make it as fast as the kernel runs. Lots of people do that in high frequency trading as they don't want the CPU to get in the way of their work or response times to the network. But without doing fancy tricks like that, no. Think about what an operating system does. It's job is to schedule things that need to be done behind the back of your program. Otherwise there's no need for it, right? good luck! greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
