Commit Graph

110 Commits

Author SHA1 Message Date
Poul-Henning Kamp
227ee8a188 Eradicate the variable "time" from the kernel, using various measures.
"time" wasn't a atomic variable, so splfoo() protection were needed
around any access to it, unless you just wanted the seconds part.

Most uses of time.tv_sec now uses the new variable time_second instead.

gettime() changed to getmicrotime(0.

Remove a couple of unneeded splfoo() protections, the new getmicrotime()
is atomic, (until Bruce sets a breakpoint in it).

A couple of places needed random data, so use read_random() instead
of mucking about with time which isn't random.

Add a new nfs_curusec() function.

Mark a couple of bogosities involving the now disappeard time variable.

Update ffs_update() to avoid the weird "== &time" checks, by fixing the
one remaining call that passwd &time as args.

Change profiling in ncr.c to use ticks instead of time.  Resolution is
the same.

Add new function "tvtohz()" to avoid the bogus "splfoo(), add time, call
hzto() which subtracts time" sequences.

Reviewed by:	bde
1998-03-30 09:56:58 +00:00
Poul-Henning Kamp
a0502b19d4 Add two new functions, get{micro|nano}time.
They are atomic, but return in essence what is in the "time" variable.
gettime() is now a macro front for getmicrotime().

Various patches to use the two new functions instead of the various
hacks used in their absence.

Some puntuation and grammer patches from Bruce.

A couple of XXX comments.
1998-03-26 20:54:05 +00:00
Poul-Henning Kamp
b05dcf3c2f A bunch of BNN (Bruce Normal Nits) from bde:
Bring back the softclock inlining
	save a couple of <<32's
	many white-space shuffles.
1998-03-16 10:19:12 +00:00
Poul-Henning Kamp
7ec73f6417 Replace TOD clock code with more systematic approach.
Highlights:
    * Simple model for underlying hardware.
    * Hardware basis for timekeeping can be changed on the fly.
    * Only one hardware clock responsible for TOD keeping.
    * Provides a real nanotime() function.
    * Time granularity: .232E-18 seconds.
    * Frequency granularity:  .238E-12 s/s
    * Frequency adjustment is continuous in time.
    * Less overhead for frequency adjustment.
    * Improves xntpd performance.

Reviewed by:    bde, bde, bde
1998-02-20 16:36:17 +00:00
Poul-Henning Kamp
c7c9a816a1 Add a nanotime() function so that we can start to use this call. 1998-02-15 13:55:06 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Poul-Henning Kamp
6f70df1587 Move almost all the ntp related stuff from kern_clock.c to
kern_ntptime.c.  The only bit left over is that which is executed
in all calls to hardclock().  Various cleanups and staticizing
along the road.
1998-01-14 20:48:16 +00:00
Poul-Henning Kamp
bb303fe246 Try to solve timeout race by not touching softtics here. 1998-01-11 19:07:58 +00:00
Poul-Henning Kamp
55c449bc0f Fix softclock calling so we don't loose timeouts (I broke this ~10h ago) 1998-01-11 00:44:31 +00:00
Poul-Henning Kamp
eeb355f73f Whoops. softclock is called from doreti_swi as well. Abandon call from
hardclock().

Forgot this:

Pointed hat sent by:	bd
1998-01-10 14:55:14 +00:00
Poul-Henning Kamp
a50ec50568 Effect the divorce of kern_clock.c and kern_timeout.c (which was
repository copied from kern_clock.c)
1998-01-10 13:16:26 +00:00
Poul-Henning Kamp
9cf25fbec7 Improve hardpps readability a bit:
* Rename usec to p_usec so you can search for it.
* Macroize the huge median_of_3_samples if statement.
1998-01-07 12:29:17 +00:00
Nate Williams
e1d6dc656d This patch causes the "calltodo" timer list to be decremented by the amount
of time that the laptop was suspending.  Thus, select() calls that might have
suspended rather than firing  at 1hr + "time suspended" since the timer was
posted.

Adding:

    options  APM_FIXUP_CALLTODO

to the kernel config enables the patch.

[
This patch was slightly modified to use a consistant indent style and
I removed some unused local variables.  After this has been tested a
few weeks we'll make the options the default, so for now I'm now
documenting it in LINT.  Mike can later if he wants.
]

Reviewed by:	Mike Smith <msmith@freebsd.org>
Submitted by:	Ken Key  <key@cs.utk.edu>
1997-12-23 16:32:35 +00:00
Steve Passe
eae8fc2c8a The improvements to clock statistics by Tor Egge
Wrappered and enabled by the define BETTER_CLOCK (on by default in smpyests.h)

Reviewed by:	smp@csn.net
Submitted by:	Tor Egge <Tor.Egge@idi.ntnu.no>
1997-12-08 23:00:24 +00:00
Bruce Evans
b672aa4ba6 Removed all traces of P_IDLEPROC. It was tested but never set. 1997-11-24 15:15:33 +00:00
Bruce Evans
99af8d4e43 Removed unused #include. 1997-11-18 12:24:22 +00:00
Poul-Henning Kamp
4a11ca4e29 Remove a bunch of variables which were unused both in GENERIC and LINT.
Found by:	-Wunused
1997-11-07 08:53:44 +00:00
Justin T. Gibbs
453276111e Store an absolute tick value in callout entries so that a subtraction on
hash chain traversal isn't needed.  This also allows untimeout to recompute
the hash to find the bucket that the entry to remove is stored in so
that each callout entry no longer needs to store that information.

Reviewed by:	 Nate Williams <nate@mt.sri.com>
1997-09-24 16:39:27 +00:00
Justin T. Gibbs
ab36c06737 init_main.c subr_autoconf.c:
Add support for "interrupt driven configuration hooks".
	A component of the kernel can register a hook, most likely
	during auto-configuration, and receive a callback once
	interrupt services are available.  This callback will occur before
	the root and dump devices are configured, so the configuration
	task can affect the selection of those two devices or complete
	any tasks that need to be performed prior to launching init.
	System boot is posponed so long as a hook is registered.  The
	hook owner is responsible for removing the hook once their task
	is complete or the system boot can continue.

kern_acct.c kern_clock.c kern_exit.c kern_synch.c kern_time.c:
	Change the interface and implementation for the kernel callout
	service.  The new implemntaion is based on the work of
	Adam M. Costello and George Varghese, published in a technical
	report entitled "Redesigning the BSD Callout and Timer Facilities".
	The interface used in FreeBSD is a little different than the one
	outlined in the paper.  The new function prototypes are:

	struct callout_handle timeout(void (*func)(void *),
				      void *arg, int ticks);

	void untimeout(void (*func)(void *), void *arg,
		       struct callout_handle handle);

	If a client wishes to remove a timeout, it must store the
	callout_handle returned by timeout and pass it to untimeout.

	The new implementation gives 0(1) insert and removal of callouts
	making this interface scale well even for applications that
	keep 100s of callouts outstanding.

	See the updated timeout.9 man page for more details.
1997-09-21 22:00:25 +00:00
Bruce Evans
bea0f0be7b Some staticized variables were still declared to be extern. 1997-09-07 05:27:26 +00:00
Bruce Evans
e4ba6a82b0 Removed unused #includes. 1997-09-02 20:06:59 +00:00
Bruce Evans
b1037dcd53 #include <machine/limits.h> explicitly in the few places that it is required. 1997-08-21 20:33:42 +00:00
John Hay
5faa3121a9 Add tickadj to struct clockinfo, like NetBSD and OpenBSD.
NOTE: libc, time, kgmon and rpc.rstatd will have to be recompiled.
1997-06-24 18:21:09 +00:00
Peter Wemm
477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00
Mike Pritchard
9a8f4a4c93 Restore Bruce's original comment. It seems that "iff" = if and only if,
and is not a typo.  It is used other places in the kernel, too.
1997-03-22 20:34:21 +00:00
Mike Pritchard
269ebc8621 Fix a typo in a comment of a recent commit. 1997-03-22 16:52:19 +00:00
Bruce Evans
3c81694426 Fixed some invalid (non-atomic) accesses to `time', mostly ones of the
form `tv = time'.  Use a new function gettime().  The current version
just forces atomicicity without fixing precision or efficiency bugs.
Simplified some related valid accesses by using the central function.
1997-03-22 06:53:45 +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
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +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
John Hay
885bd8e459 Update our kernel ntp code to the latest from David Mills. The main change
is the addition of the FLL code, which is used by the latest versions of
xntpd. The kernel PPS code is also updated, although I can't test that yet.
1996-12-30 18:26:28 +00:00
Bruce Evans
835bd1ce62 Improved biasing of i586 clock by adjusting for hardclock() latency.
I decided to do this for every hardclock() call instead of lazily
in microtime().  The lazy method is simpler but has more overhead
if microtime() is called a lot.

CPU_THISTICKLEN() is now a no-op and should probably go away.
Previously it did nothing directly but had the side effect of
setting i586_last_tick for CPU_CLOCKUPDATE() and i586_avg_tick for
debugging.  CPU_CLOCKUPDATE() now uses a better method and
i586_avg_tick is too much trouble to maintain.

Reduced nesting of #includes in the usual case.

Increased nesting of #includes when CLOCK_HAIR is defined.  This
is a kludge to get typedefs for inline functions only when the
inline functions are used.  Normally only kern_clock.c defines
this.  kern_clock.c can't include the i386 headers directly.

Removed unused LOCORE support.
1996-10-25 13:01:56 +00:00
Bruce Evans
a0ea75ecbd Don't include "opt_cpu.h" in <machine/clock.h>, since this breaks lkm's.
The change breaks kern_clock.c; fix that temporarily by including
"opt_cpu.h" there.
1996-10-10 10:25:26 +00:00
Bruce Evans
f5e9e8ec43 Fixed resource usage integrals. They were too large by a factor of
of profhz/stathz when profiling was enabled.
1996-07-30 16:59:22 +00:00
Bruce Evans
cc3d522683 Unstaticize psratio and staticize profprocs. psratio needs to be exported
to trap.c to fix user profiling.
1996-06-23 17:40:47 +00:00
Poul-Henning Kamp
27a0b398a7 Staticize.
Unstaticize a function in scsi/scsi_base that was used, with an undocumented
option.
My last count on the LINT kernel shows:
Total symbols:  3647
unref symbols:   463
undef symbols:     4
1 ref symbols:  1751
2 ref symbols:   485
Approaching the pain threshold now.
1995-12-17 21:23:44 +00:00
David Greenman
efeaf95a41 Untangled the vm.h include file spaghetti. 1995-12-07 12:48:31 +00:00
Poul-Henning Kamp
65d0bc1387 A couple of minor tweaks to the sysctl stuff. 1995-12-06 13:27:39 +00:00
Poul-Henning Kamp
946bb7a268 A major sweep over the sysctl stuff.
Move a lot of variables home to their own code (In good time before xmas :-)

Introduce the string descrition of format.

Add a couple more functions to poke into these marvels, while I try to
decide what the correct interface should look like.

Next is adding vars on the fly, and sysctl looking at them too.

Removed a tine bit of defunct and #ifdefed notused code in swapgeneric.
1995-12-04 16:48:58 +00:00
Bruce Evans
d841aaa740 Finished (?) cleaning up sysinit stuff. 1995-12-02 17:11:20 +00:00
Poul-Henning Kamp
ae0eb976c5 The entire sysctl callback to read/write version. I havn't tested this as
much as I'd like to, but the malloc stunt I tried for an interim for
sure does worse.
Now we can read and write from any kind of address-space, not only
user and kernel, using callbacks.
This may be over-generalization for now, but it's actually simpler.
1995-11-12 19:52:09 +00:00
Poul-Henning Kamp
787d58f201 Fix some of the sysctl broke, and add a lot more to it. 1995-11-08 08:48:36 +00:00
Garrett Wollman
07e3b0c25b Improve clock accuracy by accounting for late/missed clock interrupts
if the hardware supports it.
1995-10-12 20:35:01 +00:00
David Greenman
4590fd3a2a Fixed init functions argument type - caddr_t -> void *. Fixed a couple of
compiler warnings.
1995-09-09 18:10:37 +00:00
Julian Elischer
2b14f991e6 Reviewed by: julian with quick glances by bruce and others
Submitted by:	terry (terry lambert)
This is  a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports loadbal modules better
some cleanups in the namei code to help terry in 16-bit character support
some changes to the mount-root code to make it a little more
modular..

NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able
to test those cases..

certainly mounting root of disk still works just fine..
mfs should work but is untested. (tomorrows task)

The low level init stuff includes a total rewrite of init_main.c
to make it possible for new modules to have an init phase by simply
adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can
be added to the kernel without editing any other files other than the
'files' file.
1995-08-28 09:19:25 +00:00
Bruce Evans
28f8db1403 Eliminate sloppy common-style declarations. There should be none left for
the LINT configuation.
1995-07-29 11:44:31 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +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
Bruce Evans
6976af69e8 Obtained from: my old fix for 1.1.5
Improve hzto():

Round up instead of down and then add 1 tick.  This fixes sleep(1)
sometimes sleeping for < 1 second and usleep(10000) sometimes sleeping
for as little as 1 usec + syscall time.

Don't do all the calculations at splhigh().

Don't depend on `tick' being a multiple of 1000.

Don't lose accuracy for `sec' between 0x7fffffff / 1000 - 1000 and
0x7fffffff / hz.

Don't assume that longs are 32 bits or that ints have the same size as
longs.
1994-12-12 11:58:46 +00:00
Garrett Wollman
8478cabaea kern_clock.c: define dk_names[][].
kern_sysctl.c: call dev_sysctl for hw.devconf mib subtree
kern_devconf.c: sysctl-accessible device-configuration and -management
	interface
1994-10-16 03:52:14 +00:00
Poul-Henning Kamp
797f2d22f0 All of this is cosmetic. prototypes, #includes, printfs and so on. Makes
GCC a lot more silent.
1994-10-02 17:35:40 +00:00
Garrett Wollman
93e010b0fd Fixed bug in hardclock() that caused adjtime() to fail when given
a negative offset.  This would be seen in xntpd as a rash of
``Previous time adjustment didn't complete'' messages on startup.
1994-09-29 00:52:06 +00:00
Poul-Henning Kamp
bb56ec4a05 While in the real world, I had a bad case of being swapped out for a lot of
cycles.  While waiting there I added a lot of the extra ()'s I have, (I have
never used LISP to any extent).  So I compiled the kernel with -Wall and
shut up a lot of "suggest you add ()'s", removed a bunch of unused var's
and added a couple of declarations here and there.  Having a lap-top is
highly recommended.  My kernel still runs, yell at me if you kernel breaks.
1994-09-25 19:34:02 +00:00
Garrett Wollman
3f31c649d1 Redo Kernel NTP PLL support, kernel side.
This code is mostly taken from the 1.1 port (which was in turn taken from
Dave Mills's kern.tar.Z example).  A few significant differences:

1) ntp_gettime() is now a MIB variable rather than a system call.  A few
fiddles are done in libc to make it behave the same.

2) mono_time does not participate in the PLL adjustments.

3) A new interface has been defined (in <machine/clock.h>) for doing
possibly machine-dependent things around the time of the clock update.
This is used in Pentium kernels to disable interrupts, set `time', and
reset the CPU cycle counter as quickly as possible to avoid jitter in
microtime().  Measurements show an apparent resolution of a bit more than
8.14usec, which is reasonable given system-call overhead.
1994-09-18 20:40:01 +00:00
David Greenman
8a129caed5 1) Changed ddb into a option rather than a pseudo-device (use options DDB
in your kernel config now).
2) Added ps ddb function from 1.1.5. Cleaned it up a bit and moved into its
   own file.
3) Added \r handing in db_printf.
4) Added missing memory usage stats to statclock().
5) Added dummy function to pseudo_set so it will be emitted if there
   are no other pseudo declarations.
1994-08-27 16:14:39 +00:00
Garrett Wollman
f23b4c91c4 Fix up some sloppy coding practices:
- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitialized data in
  header files.
- Add a few prototypes.
- Clean up warnings resulting from the above.

NB: ioconf.c will still generate a redundant-declaration warning, which
is unavoidable unless somebody volunteers to make `config' smarter.
1994-08-18 22:36:09 +00:00
David Greenman
3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
Rodney W. Grimes
26f9a76710 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
Rodney W. Grimes
df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00