Date: Wed, 2 Apr 2008 11:20:30 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys callout.h src/sys/kern kern_clock.c kern_intr.c kern_timeout.c Message-ID: <200804021120.m32BKUYX089976@repoman.freebsd.org>
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jeff 2008-04-02 11:20:30 UTC
FreeBSD src repository
Modified files:
sys/sys callout.h
sys/kern kern_clock.c kern_intr.c kern_timeout.c
Log:
Implement per-cpu callout threads, wheels, and locks.
- Move callout thread creation from kern_intr.c to kern_timeout.c
- Call callout_tick() on every processor via hardclock_cpu() rather than
inspecting callout internal details in kern_clock.c.
- Remove callout implementation details from callout.h
- Package up all of the global variables into a per-cpu callout structure.
- Start one thread per-cpu. Threads are not strictly bound. They prefer
to execute on the native cpu but may migrate temporarily if interrupts
are starving callout processing.
- Run all callouts by default in the thread for cpu0 to maintain current
ordering and concurrency guarantees. Many consumers may not properly
handle concurrent execution.
- The new callout_reset_on() api allows specifying a particular cpu to
execute the callout on. This may migrate a callout to a new cpu.
callout_reset() schedules on the last assigned cpu while
callout_reset_curcpu() schedules on the current cpu.
Reviewed by: phk
Sponsored by: Nokia
Revision Changes Path
1.209 +2 -23 src/sys/kern/kern_clock.c
1.158 +14 -11 src/sys/kern/kern_intr.c
1.112 +246 -124 src/sys/kern/kern_timeout.c
1.33 +9 -7 src/sys/sys/callout.h
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