Timers and timing, was: MySQL Performance 6.0rc1

[Poul-Henning Kamp]

In message <4362BA38.1090603 at portaone.com>, Maxim Sobolev writes:

>You can solve most of those issues by exporting from kernel to userland 
>not only page(s) with actual data, but also page(s) with code to handle 
>that data. Then you can turn syscalls implementation in libc into plain 
>function calls to addresses in that code page(s). This approach can 
>potentially have other interesting applications, for example it will be 
>possible to use processor-specific syscalls instructions without 
>recompiling userland, move some of the ABI code into userland (i.e. 
>freebsd32 layer on amd64) etc.

I'm not sure I see much difference between a shared library and this
solution, but I'm equally sure we'd love to se a prototype before
we judge it :-)

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.