Commit Graph

70 Commits

Author SHA1 Message Date
Matthew Dillon
a1d6c3ec87 Add asleep() and await() support. Currently highly experimental. A
small support structure had to be added to the proc structure, and
    a few minor conditional panics no longer apply.
1998-12-21 07:41:51 +00:00
David Greenman
f2b678d4cb Compare p_cpulimit with RLIM_INFINITY before comparing it with the process
runtime. p_runtime is unsigned while p_cpulimit is not, so this avoids the
nasty side effect of the process getting killed when the runtime comes up
"negative" due to other bugs.
1998-11-27 11:44:22 +00:00
Bruce Evans
e7414d1bfa Fixed the previous fix - stathz doesn't give the statclock frequency
when it is 0.

Submitted by:	mostly by Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
1998-11-26 16:49:55 +00:00
Bruce Evans
44f05f9c92 Oops, yet again back out some local changes that shouldn't have been
in the previous commit.
1998-11-26 14:05:58 +00:00
Bruce Evans
e4d0e37b33 Fixed scaling of p_pctcpu. It was wrong by a factor of stathz/hz.
Until recently, this was half compensated for in at least ps and top
by multiplying by 100/stathz to get a better wrong factor of 100/hz.
1998-11-26 14:00:08 +00:00
Bruce Evans
b64f28be2d Oops, back out some local changes that shouldn't have been in the
previous commit.
1998-10-25 20:11:36 +00:00
Bruce Evans
c8a1bed2ab Fixed breakage of the !SMP case of roundrobin() in the previous commit. 1998-10-25 19:57:23 +00:00
Poul-Henning Kamp
f5ef029e92 Nitpicking and dusting performed on a train. Removes trivial warnings
about unused variables, labels and other lint.
1998-10-25 17:44:59 +00:00
Matthew Dillon
8e519d1f35 priority comparison in maybe_resched() didn't work properly if current
and chk process were on different scheduler queues.  Fixed.
1998-08-26 05:27:42 +00:00
Bruce Evans
a23d65bfc8 Cast pointers to uintptr_t/intptr_t instead of to u_long/long,
respectively.  Most of the longs should probably have been
u_longs, but this changes is just to prevent warnings about
casts between pointers and integers of different sizes, not
to fix poorly chosen types.
1998-07-15 02:32:35 +00:00
Bruce Evans
bef7db2e66 Moved definition of fscale from param.c to kern_synch.c where it
should always have been (it has no user-servicable parts even at
compile time) and staticized it.
1998-07-11 13:06:41 +00:00
Poul-Henning Kamp
8cb5266728 Add 3 sysctl variables for future use by ps)1_ 1998-06-30 21:25:58 +00:00
Bruce Evans
be160d60ab Removed unused includes. 1998-06-21 18:02:50 +00:00
Poul-Henning Kamp
e796e00de3 Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.
Clean up (or if antipodic: down) some of the msgbuf stuff.

Use an inline function rather than a macro for timecounter delta.

Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.

Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()

This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.

WARNING:  Programs which muck about with struct proc in userland
will have to be fixed.

Reviewed, but found imperfect by:       bde
1998-05-28 09:30:28 +00:00
Tor Egge
2f1e70693d Add forwarding of roundrobin to other cpus. This gives a more regular
update of cpu usage as shown by top when one process is cpu bound
(no system calls) while the system is otherwise idle (except for top).

Don't attempt to switch to the BSP in boot().  If the system was idle when
an interrupt caused a panic, this won't work.  Instead, switch to the BSP
in cpu_reset.

Remove some spurious forward_statclock/forward_hardclock warnings.
1998-05-17 22:12:14 +00:00
Poul-Henning Kamp
c21410e119 s/nanoruntime/nanouptime/g
s/microruntime/microuptime/g

Reviewed by:	bde
1998-05-17 11:53:46 +00:00
Poul-Henning Kamp
00af9731c9 Time changes mark 2:
* Figure out UTC relative to boottime.  Four new functions provide
      time relative to boottime.

    * move "runtime" into struct proc.  This helps fix the calcru()
      problem in SMP.

    * kill mono_time.

    * add timespec{add|sub|cmp} macros to time.h.  (XXX: These may change!)

    * nanosleep, select & poll takes long sleeps one day at a time

Reviewed by:    bde
Tested by:      ache and others
1998-04-04 13:26:20 +00:00
Peter Dufault
7c9f6f8f8b Remove duplicate comment 1998-03-28 18:16:29 +00:00
Peter Dufault
8a6472b723 Finish _POSIX_PRIORITY_SCHEDULING. Needs P1003_1B and
_KPOSIX_PRIORITY_SCHEDULING options to work.  Changes:

Change all "posix4" to "p1003_1b".  Misnamed files are left
as "posix4" until I'm told if I can simply delete them and add
new ones;

Add _POSIX_PRIORITY_SCHEDULING system calls for FreeBSD and Linux;

Add man pages for _POSIX_PRIORITY_SCHEDULING system calls;

Add options to LINT;

Minor fixes to P1003_1B code during testing.
1998-03-28 11:51:01 +00:00
Bruce Evans
08637435f2 Moved some #includes from <sys/param.h> nearer to where they are actually
used.
1998-03-28 10:33:27 +00:00
Peter Dufault
917827427e idprio processes must be preempted as soon as anything is runnable. 1998-03-11 20:50:42 +00:00
Julian Elischer
b1897c197c Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman)
Submitted by:	Kirk McKusick (mcKusick@mckusick.com)
Obtained from:  WHistle development tree
1998-03-08 09:59:44 +00:00
Peter Dufault
644d85f4ca Reviewed by: msmith, bde long ago
Fix for RTPRIO scheduler to eliminate invalid context switches.

POSIX.4 headers and sysctl variables.  Nothing should change
unless POSIX4 is defined or _POSIX_VERSION is set to 199309.
1998-03-04 10:25:55 +00:00
Bruce Evans
a0d38b495a Fixed a missing newline in a debugging printf.
Fixed punctuation in some comments.
1998-02-25 06:04:46 +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
Bruce Evans
b2ef07b7a2 Fixed style bugs in previous commit. 1997-12-29 08:54:52 +00:00
John Dyson
2be70f79f6 Lots of improvements, including restructring the caching and management
of vnodes and objects.  There are some metadata performance improvements
that come along with this.  There are also a few prototypes added when
the need is noticed.  Changes include:

1) Cleaning up vref, vget.
2) Removal of the object cache.
3) Nuke vnode_pager_uncache and friends, because they aren't needed anymore.
4) Correct some missing LK_RETRY's in vn_lock.
5) Correct the page range in the code for msync.

Be gentle, and please give me feedback asap.
1997-12-29 00:25:11 +00:00
Julian Elischer
95802bf803 Shift a few SYSINT() calls around.
this results in a few functions becoming static, and
the SYSINITs being close to the code they are related to.
setting up the dump device is with dumpsys() and
kicking off the scheduler is with the scheduler.
Mounting root is with the code that does it.

Reviewed by: phk
1997-11-25 07:07:48 +00:00
Bruce Evans
cb451ebdbd Staticized. 1997-11-22 08:35:46 +00:00
Bruce Evans
6881d20fbb Const poisoning from ks_shortdesc. 1997-11-21 11:37:03 +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
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
Julian Elischer
ff36905c57 Take verbal beating by wollman into account and fix DIAGNOSTIC test.
This version.
1/ avoids garret's introduced  potential page fault. (I got one)
2/ removes compiler warnings

Also fix the tunable scheduling quantum to return a better error code when
fed a bad argument.
1997-08-18 01:34:38 +00:00
Garrett Wollman
62f74f2f72 Dejulianize DIAGNOSTIC panic code. The types are wrong; probably there's
a missing dereference.
1997-08-16 19:07:20 +00:00
Julian Elischer
3d0a7bc3b8 add a diagnostic to catch some common cases of tsleep being
called from the wrong place.
1997-08-13 19:29:33 +00:00
Julian Elischer
90405c80e1 Make the scheduler quantum a tunable parameter
Reviewd by: John Dyson  dyson@freebsd.org
1997-08-08 22:48:57 +00:00
Peter Wemm
b3196e4b9f Preliminary support for per-cpu data pages.
This eliminates a lot of #ifdef SMP type code.  Things like _curproc reside
in a data page that is unique on each cpu, eliminating the expensive macros
like:    #define curproc (SMPcurproc[cpunumber()])

There are some unresolved bootstrap and address space sharing issues at
present, but Steve is waiting on this for other work.  There is still some
strictly temporary code present that isn't exactly pretty.

This is part of a larger change that has run into some bumps, this part is
standalone so it should be safe.  The temporary code goes away when the
full idle cpu support is finished.

Reviewed by: fsmp, dyson
1997-06-22 16:04:22 +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
Bruce Evans
a1ab34e3d0 Wrapped mi_switch() with splstatclock()/splx(). This fixes excessive
interrupt latency for certain cases involving for restarting stopped
processes.
1997-02-27 18:03:48 +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 Dyson
a669a6e9a9 Make processes waken up eligible for immediate swap-in. 1996-10-17 02:58:20 +00:00
Gary Palmer
9986e07e1f Remove the code that renices +4 a process that has had 10 minutes of
CPU time. I find it slightly annoying on one of our servers here.

Also disliked by: David Greenman
1996-09-22 06:35:24 +00:00
David Greenman
09c75661de Change an splstatclock that should be an splhigh into an splhigh.
Reviewed by:	bde
1996-09-01 10:30:33 +00:00
Bruce Evans
b7ccad0af0 Fixed a stale comment. 1996-08-28 18:36:30 +00:00
David Greenman
4f898e1524 Changed wakeup_one() to continue looping, possibly waking up additional
processes, until it finds one that is not swapped out.

Submitted by:	dyson
1996-07-31 10:35:47 +00:00
David Greenman
b1508c72f4 Converted timer/run queues to 4.4BSD queue style. Removed old and unused
sleep(). Implemented wakeup_one() which may be used in the future to combat
the "thundering herd" problem for some special cases.

Reviewed by:	dyson
1996-07-31 09:26:54 +00:00