on 24/05/2010 19:06 Alexander Motin said the following: > 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 a...@.
Thanks! >> 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. Thank you for the explanation. BTW, with e.g. HPET we may consider using a separate clock for profiling, but I am not sure. -- Andriy Gapon _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
