Implemented non-statistical kernel profiling. This is based on

looking at a high resolution clock for each of the following events:
function call, function return, interrupt entry, interrupt exit,
and interesting branches.  The differences between the times of
these events are added at appropriate places in a ordinary histogram
(as if very fast statistical profiling sampled the pc at those
places) so that ordinary gprof can be used to analyze the times.

gmon.h:
Histogram counters need to be 4 bytes for microsecond resolutions.
They will need to be larger for the 586 clock.
The comments were vax-centric and wrong even on vaxes.  Does anyone
disagree?

gprof4.c:
The standard gprof should support counters of all integral sizes
and the size of the counter should be in the gmon header.  This
hack will do until then.  (Use gprof4 -u to examine the results
of non-statistical profiling.)

config/*:
Non-statistical profiling is configured with `config -pp'.
`config -p' still gives ordinary profiling.

kgmon/*:
Non-statistical profiling is enabled with `kgmon -B'.  `kgmon -b'
still enables ordinary profiling (and distables non-statistical
profiling) if non-statistical profiling is configured.

1 files changed, 2 insertions, 1 deletions

diff --git a/usr.bin/Makefile b/usr.bin/Makefile
index 4f2edb9..37844eb 100644
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -1,5 +1,5 @@
 #	From: @(#)Makefile	8.3 (Berkeley) 1/7/94
-#	$Id: Makefile,v 1.62 1995/10/03 12:29:28 bde Exp $
+#	$Id: Makefile,v 1.63 1995/10/23 16:44:22 peter Exp $
 
 # XXX MISSING:		deroff diction graph learn plot
 #			spell spline struct units xsend
@@ -25,6 +25,7 @@ SUBDIR=	apply ar at banner basename biff cal calendar \
 	unexpand unifdef uniq unvis users uudecode uuencode vacation \
 	vgrind vi vis w wall wc what whereis which who whois window \
 	write xargs xinstall xstr yacc yes ypcat ypmatch ypwhich
+SUBDIR+=gprof4
 
 .if !exists(../secure) || defined(NOSECURE)
 SUBDIR+=telnet