svn commit: r208494 - in head/sys: amd64/amd64 amd64/include i386/i386 i386/include kern pc98/cbus sys x86/isa x86/x86

[Alexander Motin]

Andriy Gapon wrote:
> on 24/05/2010 14:40 Alexander Motin said the following:
>> Author: mav
>> Date: Mon May 24 11:40:49 2010
>> New Revision: 208494
>> URL: http://svn.freebsd.org/changeset/base/208494
>>
>> Log:
>>   - Implement MI helper functions, dividing one or two timer interrupts with
>>   arbitrary frequencies into hardclock(), statclock() and profclock() calls.
>>   Same code with minor variations duplicated several times over the tree for
>>   different timer drivers and architectures.
>>   - Switch all x86 archs to new functions, simplifying the code and removing
>>   extra logic from timer drivers. Other archs are also welcome.
> 
> could you please describe the new code/KPI in greater detail, perhaps on a more
> appropriate mailing list?

Sent some summary to arch at .

> For me it is not immediately obvious why IPI_PROFCLOCK is gone now.  I haven't
> spent much time reverse engineering this change and perhaps it's easier for you
> to describe the change.

IPI_PROFCLOCK is not used any more. Separation between statclock() and
profclock() now handled in common machine-independent code. Timer driver
generates interrupts, MD code manages timers configuration and events
redistribution to every CPU, using up to two IPIs if needed, MI code do
the rest of things.

-- 
Alexander Motin