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Commit Graph

59 Commits

Author SHA1 Message Date
John Dyson
95e5e988e0 Make our v_usecount vnode reference count work identically to the
original BSD code.  The association between the vnode and the vm_object
no longer includes reference counts.  The major difference is that
vm_object's are no longer freed gratuitiously from the vnode, and so
once an object is created for the vnode, it will last as long as the
vnode does.

When a vnode object reference count is incremented, then the underlying
vnode reference count is incremented also.  The two "objects" are now
more intimately related, and so the interactions are now much less
complex.

When vnodes are now normally placed onto the free queue with an object still
attached.  The rundown of the object happens at vnode rundown time, and
happens with exactly the same filesystem semantics of the original VFS
code.  There is absolutely no need for vnode_pager_uncache and other
travesties like that anymore.

A side-effect of these changes is that SMP locking should be much simpler,
the I/O copyin/copyout optimizations work, NFS should be more ponderable,
and further work on layered filesystems should be less frustrating, because
of the totally coherent management of the vnode objects and vnodes.

Please be careful with your system while running this code, but I would
greatly appreciate feedback as soon a reasonably possible.
1998-01-06 05:26:17 +00:00
Poul-Henning Kamp
0abc78a697 Rename some local variables to avoid shadowing other local variables.
Found by: -Wshadow
1997-11-07 09:21:01 +00:00
Bruce Evans
1fd0b0588f Removed unused #includes. 1997-08-02 14:33:27 +00:00
Andrey A. Chernov
e728d480d2 Style optimization in newly added POSIX range []] conformance, redo
'for' loop as do...while and remove variable unneded now
1997-06-07 01:33:10 +00:00
Andrey A. Chernov
05a068e60e Add missing FNM_PERIOD check for '[' range
Don't treat !^ as first characters in the range, just as negate sign
[/] never match if FNM_PATHNAME
1997-06-06 22:33:28 +00:00
Andrey A. Chernov
e2dbbd9eea 1) Now conforms POSIX.2 2.8.3.2 requirements about []] pattern
2) Treat unclosed [ range in pattern as regular characters (bash style)
1997-06-06 21:48:55 +00:00
John Polstra
298c8e3d6b Fix a bug that caused some false mismatches when both FNM_PATHNAME
and FNM_LEADING_DIR were specified and the pattern ended with "*".
Example: pattern="src/usr.sbin/w*", string="src/usr.sbin/watch/watch.8,v".
This should match, but did not.
1997-04-29 03:24:57 +00:00
Andrey A. Chernov
6a575f6e24 Eliminate some function calls when locale not used 1997-04-04 19:08:19 +00:00
Andrey A. Chernov
5058254947 Speedup in case locale not used 1997-04-04 18:44:19 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Andrey A. Chernov
edcfa07284 collate_range_cmp -> __collate_range_cmp 1996-10-31 04:32:27 +00:00
Bruce Evans
1471a79514 Unremoved used #include of <sys/systm.h> for the !GUPROF case. 1996-10-25 06:58:53 +00:00
Andrey A. Chernov
3deeb59da9 GNU-style changes:
1) Rename FNM_ICASE to FNM_CASEFOLD
2) Add FNM_LEADING_DIR
Add proper (unsigned char) casts to tolower().
Use 'char' function argument for proper sign extension
1996-10-23 16:40:20 +00:00
Wolfram Schneider
95e4966c47 add flag FNM_ICASE for case insensitve search
Reviewed by: ache
1996-10-20 15:15:59 +00:00
Bruce Evans
d6b9e17eb5 Improved non-statistical (GUPROF) profiling:
- use a more accurate and more efficient method of compensating for
  overheads.  The old method counted too much time against leaf
  functions.
- normally use the Pentium timestamp counter if available.
  On Pentiums, the times are now accurate to within a couple of cpu
  clock cycles per function call in the (unlikely) event that there
  are no cache misses in or caused by the profiling code.
- optionally use an arbitrary Pentium event counter if available.
- optionally regress to using the i8254 counter.
- scaled the i8254 counter by a factor of 128.  Now the i8254 counters
  overflow slightly faster than the TSC counters for a 150MHz Pentium :-)
  (after about 16 seconds).  This is to avoid fractional overheads.

files.i386:
permon.c temporarily has to be classified as a profiling-routine
because a couple of functions in it may be called from profiling code.

options.i386:
- I586_CTR_GUPROF is currently unused (oops).
- I586_PMC_GUPROF should be something like 0x70000 to enable (but not
  use unless prof_machdep.c is changed) support for Pentium event
  counters.  7 is a control mode and the counter number 0 is somewhere
  in the 0000 bits (see perfmon.h for the encoding).

profile.h:
- added declarations.
- cleaned up separation of user mode declarations.

prof_machdep.c:
Mostly clock-select changes.  The default clock can be changed by
editing kmem.  There should be a sysctl for this.

subr_prof.c:
- added copyright.
- calibrate overheads for the new method.
- documented new method.
- fixed races and and machine dependencies in start/stop code.

mcount.c:
Use the new overhead compensation method.

gmon.h:
- changed GPROF4 counter type from unsigned to int.  Oops, this should
  be machine-dependent and/or int32_t.
- reorganized overhead counters.

Submitted by:	Pentium event counter changes mostly by wollman
1996-10-17 19:32:31 +00:00
Peter Wemm
840a0352e9 add simple srandom() and prototype 1996-09-23 04:31:43 +00:00
Bruce Evans
f313170d3c Updated #includes to 4.4Lite style. 1996-09-10 08:32:01 +00:00
Bruce Evans
e0c95ed947 Fixed the easy cases of const poisoning in the kernel. Cosmetic. 1996-08-31 16:52:44 +00:00
Bruce Evans
09a8dfa260 Don't depend in the kernel on the gcc feature of doing arithmetic on
pointers of type `void *'.  Warn about this in future.
1996-08-31 14:48:13 +00:00
Bruce Evans
9dfde365a2 Removed sccsids and rcsids and added Id$ to save space like everything
else in libkern.
1996-08-28 20:32:21 +00:00
Bruce Evans
1f403fcfbf Cleaned up interrupt masking by declaring the state variable in a
machine-dependent macro and passing it to all machine-dependent
macros.

Eliminated the state variable for the GUPROF case.
1996-08-28 20:15:32 +00:00
Andrey A. Chernov
79deb12410 Convert to newly aded collate compare function 1996-08-12 18:49:54 +00:00
Andrey A. Chernov
36a00a4b79 Use collate for alpha character ranges 1996-08-12 04:03:50 +00:00
Jordan K. Hubbard
51295a4d3e General -Wall warning cleanup, part I.
Submitted-By: Kent Vander Velden <graphix@iastate.edu>
1996-07-12 18:57:58 +00:00
Nate Williams
24dc6cfd7e Added index() which will be used shortly in some fixes to the ibcs2
emulation code.
1996-06-07 22:21:31 +00:00
Poul-Henning Kamp
e911eafcba removed:
CLBYTES PD_SHIFT PGSHIFT NBPG PGOFSET CLSIZELOG2 CLSIZE pdei()
        ptei() kvtopte() ptetov() ispt() ptetoav() &c &c
new:
        NPDEPG

Major macro cleanup.
1996-05-02 14:21:14 +00:00
Bruce Evans
8a4599117b Don't include <sys/types.h> when it isn't used.
This commit covers most of the ANSI library functions. Many others only
need <sys/types.h> because they use u_xxx.
1996-04-19 18:40:25 +00:00
Bruce Evans
87b620baa9 Don't depend on <sys/types.h> including <sys/cdefs.h>. 1996-04-19 17:39:57 +00:00
Poul-Henning Kamp
f0fb9bf18f Extend to handle all radix < 37 1996-01-24 20:51:26 +00:00
Bruce Evans
6b3f80661e Moved BCD declarations to the correct header (libkern.h).
Fixed BCD declarations.  They didn't match their definitions...

libkern.h, bcd.c:
KNFised.  `indent' worked 99% perfectly on bcd.c.  It worked 99%
_imperfectly_ on subr_prf.c.
1996-01-16 10:23:22 +00:00
Poul-Henning Kamp
3eb50b2edd My wife is busy making me a new conical hat, so you don't need to
send any to me this time.  Commited an old copy of this files where
the tables were swapped.  Duh!.
1996-01-15 21:26:43 +00:00
Poul-Henning Kamp
77c17f5c65 Add the bcd <-> bin and hex -> ascii tables. 1996-01-15 10:03:49 +00:00
Peter Wemm
a5b996a7ec recording cvs-1.6 file death 1995-12-30 19:02:48 +00:00
Bruce Evans
1ae38af2be Copied mcount.c from the library again. #include'ing it via a relative
path to a possibly-nonexistent place didn't work well enough.  Sigh.
1995-12-30 07:24:13 +00:00
Bruce Evans
912e603778 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
Bruce Evans
62394a63c8 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
Bruce Evans
432889653c Added prototypes. 1995-12-26 13:25:13 +00:00
Nate Williams
637442dc62 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
Poul-Henning Kamp
d89a1b600f Add qsort() to libkern, taken from libc. 1995-11-08 08:40:11 +00:00
Poul-Henning Kamp
16657f0ba9 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
Bruce Evans
5182dcbec2 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
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Rodney W. Grimes
6c06b4e2aa Remove trailing whitespace. 1995-05-30 05:51:47 +00:00
Rodney W. Grimes
63bc0cc148 Do not install libkern into /usr/lib, blank target install: added. 1995-03-23 07:02:14 +00:00
Poul-Henning Kamp
5edd0e154f <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
Bruce Evans
b5e8ce9f12 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
Garrett Wollman
ef0cdf3329 Add inet_ntoa() and replace ARP's private routine with same. 1995-03-16 17:32:27 +00:00
Ugen J.S. Antsilevich
be96c4f445 Add strncmp() function..I need it and
hope nobody will eat me alive for this..:)
1995-02-27 09:16:04 +00:00
Bruce Evans
fa724216f5 Always build libkern_p.a. `NOPROFILE' should only control user libraries. 1995-01-10 01:57:56 +00:00