Improving the kernel/i386 timecounter performance (GSoC
scottl at samsco.org
Fri Mar 27 11:30:28 PDT 2009
Robert Watson wrote:
> On Fri, 27 Mar 2009, Scott Long wrote:
>> I've been talking about this for years. All I need is help with the
>> VM magic to create the page on fork. I also want two pages, one
>> global for gettimeofday (and any other global data we can think of)
>> and one per-process for static data like getpid/getgid.
> FWIW, there are some variations in schemes across OS's -- one extreme is
> the Linux approach, which actually exports a mini shared library in ELF
> format on the shared page, providing implementations of various services
> (such as entering system calls), time stuff, etc. Less extreme are the
> shared pages offered on Mac OS X, etc.
Yes, but I'd like to start somewhere, and considering that it's been
impossible in _5_ years to get the 30 minutes of Peter or JeffR or JHB
time to get the basic VM magic done, I'm keeping my expectations as
modest as possible.
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