Date: Mon, 24 Nov 1997 10:16:26 -0800 (PST) From: Bruce Evans <bde@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/i386/isa prof_machdep.c Message-ID: <199711241816.KAA22049@freefall.freebsd.org>
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bde 1997/11/24 10:16:26 PST
Modified files:
sys/i386/isa prof_machdep.c
Log:
Added a sysctl (machdep.cputime_clock) to select the clock used by
"high resolution" profiling. The available clocks are:
- the i8254 clock
- on non-SMP i586's and i686's: the TSC
- on systems with I586_PMC_GUPROF configured, and PERFMON configured
and available: all the performance counters.
This is unfinshed (there are problems with locking out the PERFMON
device driver, and with losing calibration after switching the clock),
but better than static configuration or writing to kmem.
Changed ifdefs to avoid generating code for non-working option
combinations.
Revision Changes Path
1.7 +55 -11 src/sys/i386/isa/prof_machdep.c
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