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Re: [GSoC 2013] Interested in "Light weight precision user level time reading"

cc: tech-kern since it also touches kerneland

On Mon, Apr 15, 2013 at 12:17 AM, zhixiang yu <> wrote:
Hi List,

I'm a graduate student from China. I'm interested in the NetBSD's "Light weight precision user level time reading" project. I'd like to take it as my GSoC 2013 project.

But before sending the detailed proposal, I'd like listen to your advices/comments since my solution is a bit different: Allocate one special page on which the kernel and user-space process can share data such as bintime,etc. The kernel will update the shared data at some event point, the kernel will also need to tell which timecounter it's using. The userspace just reads out the bintime and read the timecounter to adjust the final result. Sure the concurrency between kernel and userspace should be resolved properly.

What do you think about this solution? Is it acceptable?  

Thanks in advance

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