Commit Graph

74 Commits

Author SHA1 Message Date
bde
586cc683d8 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.
1995-12-29 15:30:05 +00:00
bde
49ed6a09d1 Removed almost all traces of libkern.a. The objects that were in
libkern.a are now specified by listing their source files in
files.${MACHINE}.  The list is machine-dependent to save space.
All the necessary object for each machine must be linked into the
kernel in case an lkm wants one.
1995-12-26 13:58:31 +00:00
bde
6a0ace8bd0 Added prototypes. 1995-12-26 13:25:13 +00:00
nate
b885d679c0 Add-back strlen.c to the library in case a kernel is compiled without
optimization.  Gcc only in-lines calls to strlen with optimization
turned on.
1995-12-19 19:47:05 +00:00
phk
022ad6e833 Add qsort() to libkern, taken from libc. 1995-11-08 08:40:11 +00:00
phk
a2463c6630 Comment out, but don't delete stuff we don't use.
Classify in "gcc stuff" and "legitimate stuff".
1995-10-05 14:46:07 +00:00
bde
8c00ee9d2c Rearrange the inner loop of scanc() to get better code on i*86's
(on an i486, 10 cycles (+ cache misses) instead of 15).  The
change should be a no-op if the compiler is any good.  The best
possible i*86 code for the same algorithm is only 1 more cycle
faster on i486's so I don't want to bother implementing an
assembler version.

scanc() is a bottleneck for OPOST processing.  It is naturally
about 4 times as slow as bcopy() on 32-bit systems.
1995-07-11 18:50:47 +00:00
rgrimes
c86f0c7a71 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
rgrimes
f05428e4cd Remove trailing whitespace. 1995-05-30 05:51:47 +00:00
rgrimes
9baf4c9564 Do not install libkern into /usr/lib, blank target install: added. 1995-03-23 07:02:14 +00:00
phk
ab48163ad2 <libkern/libkern.h> has moved to <sys/libkern.h> (repository copy).
Since /usr/include/libkern doesn't and shouldn't exist, this is the
least evil way to handle this.
1995-03-17 06:15:40 +00:00
bde
289f11acb4 Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00
wollman
8882d76eda Add inet_ntoa() and replace ARP's private routine with same. 1995-03-16 17:32:27 +00:00
ugen
496d600d6b Add strncmp() function..I need it and
hope nobody will eat me alive for this..:)
1995-02-27 09:16:04 +00:00
bde
daea081157 Always build libkern_p.a. `NOPROFILE' should only control user libraries. 1995-01-10 01:57:56 +00:00
bde
8332f818bd Hide the declaration of ffs() if an inline ffs() is implemented.
I couldn't find a better way to avoid compiler warnings about
redundant and/or inconsistent declaration of ffs().  I'd like to
be able to declare prototypes in general headers without committing
to implementing them as `static inline' or `extern', but there
seems to be no way to do this with gcc-2.6.1.  E.g.,

	int foo(void);
	static __inline int foo(void) { return 1; }

causes a warning about the linkage mismatch, while the opposite
order causes a warning about the redundant declaration.
1994-11-14 14:56:46 +00:00
jkh
29a9c7eaa7 I'm going to nuke strtol() for now. Now I need strncmp() and rather
that add it too, and end up fighting an unwanted battle right now,
I'm just going to back away from both and start including my own private
copies of everything.  I'm not going to use _anything_ from libkern
until we decide its fate.
1994-10-26 11:14:21 +00:00
jkh
0b13b0b13d Add strtol() to libkern in support of some other work I'm doing.
I just know I'm going to get flamed for adding for the miserable
abortion that is libkern, but what am I supposed to do?  At least I
didn't drag in the ctype stuff! :-)
1994-10-25 14:57:57 +00:00
bde
a15bf9b145 Use new-style declarations for min/max functions so that
"gcc -Wstrict-prototypes" doesn't emit warnings about them.

Write each min/max functions on a single line so that the similarity and
triviality of the functions is more obvious.

Put the quad min/max functions in the correct place (aphabetical order).

The u_quad min/max functions are missing.  Only 3 or 4 of the min/max
functions are actually used.  sys/socketvar.h ``should use "lmin" but
it doesn't exist now''.  lmin does exist now, but isn't used.  Since we
depend on gcc for `inline', perhaps we should depend on it for __typeof
and function-expressions and use only macros min() and max() that work
for any types (I'm not sure how to handle mixed types).
1994-09-18 23:04:25 +00:00
paul
8b7943ca6b Added -DKERNEL and added support for kernel profiling.
Reviewed by:	Bruce
1994-09-15 15:41:48 +00:00
dg
33e88fdce9 Added qmin and qmax functions to deal with quad_t's. 1994-08-30 18:19:47 +00:00
dg
8d205697aa Added $Id$ 1994-08-02 07:55:43 +00:00
rgrimes
cb2f2e712b BSD 4.4 Lite Lib Sources 1994-05-27 05:00:24 +00:00
rgrimes
8fb65ce818 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00