Re: Improving the kernel/i386 timecounter performance (GSoC proposal)

From: David Xu <davidxu_at_freebsd.org>
Date: Mon, 30 Mar 2009 12:58:53 +0800
Julian Elischer wrote:
> David Xu wrote:
>> David Xu wrote:
>>> Julian Elischer wrote:
>>>
>>>> depends on the hardware.
>>>> anyhow I was only saying it was possible, not necessarily
>>>> good or even useful.
>>>>
>>>>
>>>
>>> I had done some works for thread private page shared by kernel
>>> and userland when I was doing userland spinlock, if userland asks
>>> a page, kernel will allocate it and put some interesting thing in
>>> it by scheduler etcs, these code may be useful.
>>>
>> FYI:
>> http://people.freebsd.org/~davidxu/schedctl/
> 
> reading this quickly, you allocate a separately addressed page for
> each thread, but,  how do you use it?
> 
> 
I store the address in userland TLS area, then get it when I want to
check some scheduling informations.
Received on Mon Mar 30 2009 - 02:58:58 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:45 UTC