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* Catch up to moving headers:jhb2000-10-201-2/+2
| | | | | - machine/ipl.h -> sys/ipl.h - machine/mutex.h -> sys/mutex.h
* - Change fast interrupts on x86 to push a full interrupt frame and tojhb2000-10-061-18/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | return through doreti to handle ast's. This is necessary for the clock interrupts to work properly. - Change the clock interrupts on the x86 to be fast instead of threaded. This is needed because both hardclock() and statclock() need to run in the context of the current process, not in a separate thread context. - Kill the prevproc hack as it is no longer needed. - We really need Giant when we call psignal(), but we don't want to block during the clock interrupt. Instead, use two p_flag's in the proc struct to mark the current process as having a pending SIGVTALRM or a SIGPROF and let them be delivered during ast() when hardclock() has finished running. - Remove CLKF_BASEPRI, which was #ifdef'd out on the x86 anyways. It was broken on the x86 if it was turned on since cpl is gone. It's only use was to bogusly run softclock() directly during hardclock() rather than scheduling an SWI. - Remove the COM_LOCK simplelock and replace it with a clock_lock spin mutex. Since the spin mutex already handles disabling/restoring interrupts appropriately, this also lets us axe all the *_intr() fu. - Back out the hacks in the APIC_IO x86 cpu_initclocks() code to use temporary fast interrupts for the APIC trial. - Add two new process flags P_ALRMPEND and P_PROFPEND to mark the pending signals in hardclock() that are to be delivered in ast(). Submitted by: jakeb (making statclock safe in a fast interrupt) Submitted by: cp (concept of delaying signals until ast())
* Clean up process accounting some more. Unfortunately, it is still notjhb2000-09-121-14/+12
| | | | | quite right on i386 as the CPU who runs statclock() doesn't have a valid clockframe to calculate statistics with.
* Major update to the way synchronization is done in the kernel. Highlightsjasone2000-09-071-16/+13
| | | | | | | | | | | | | | | include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
* Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.phk2000-07-041-1/+1
| | | | Pointed out by: bde
* Style police catches up with rev 1.26 of src/sys/sys/sysctl.h:phk2000-07-031-1/+1
| | | | | | | | Sanitize SYSCTL_HANDLER_ARGS so that simplistic tools can grog our sources: -sysctl_vm_zone SYSCTL_HANDLER_ARGS +sysctl_vm_zone (SYSCTL_HANDLER_ARGS)
* Remove ~25 unneeded #include <sys/conf.h>phk2000-04-191-1/+0
| | | | Remove ~60 unneeded #include <sys/malloc.h>
* The SMP cleanup commit broke UP compiles. Make UP compiles work again.dillon2000-03-281-3/+1
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* Isolate the Timecounter internals in their own two files.phk2000-03-201-572/+2
| | | | | | | | | | | | | | | Make the public interface more systematically named. Remove the alternate method, it doesn't do any good, only ruins performance. Add counters to profile the usage of the 8 access functions. Apply the beer-ware to my code. The weird +/- counts are caused by two repocopies behind the scenes: kern/kern_clock.c -> kern/kern_tc.c sys/time.h -> sys/timetc.h (thanks peter!)
* Fix sign reversal in adjtime(2).phk2000-02-131-1/+1
| | | | Approved by: jkh
* Make adjtime(2) adjust boottime so it doesn't cause non-monotonousphk1999-12-081-2/+11
| | | | uptime.
* Fixed some comments in statclock(). The previous commit made it clearerbde1999-11-271-8/+8
| | | | that one comment was attached to null code.
* Moved scheduling-related code to kern_synch.c so that it is easier to fixbde1999-11-271-21/+1
| | | | | | | | and extend. The new function containing the code is named schedclock() as in NetBSD, but it has slightly different semantics (it already handles incrementation of p->p_cpticks, and it should handle any calling frequency). Agreed with in principle by: dufault
* #ifdef PPS_SYNC around "kapi" declaration to fix a -Wunused warning.peter1999-10-101-0/+2
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* Update the PPSAPI to draft-mogul-pps-api-05.txt which is the latest.jhay1999-10-091-42/+54
| | | | | | NOTE: This will break building ntpd until ntpd has been upgraded to also support draft 05. People that want to build ntpd in the meantime can get patches from me.
* Moved the definition of `boottime' and its sysctl to the correct file.bde1999-09-131-0/+4
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* $Id$ -> $FreeBSD$peter1999-08-281-1/+1
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* Oops, the previous commit only worked in the one case it was tested for.bde1999-07-241-2/+3
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* Added a sysctl "kern.timecounter.hardware" for selecting the hardwarebde1999-07-181-6/+41
| | | | | | | | | used for timecounting. The possible values are the names of the physically present harware timecounters ("i8254" and "TSC" on i386's). Fixed some nearby bitrot in comments in <sys/time.h>. Reviewed by: phk
* Remove four no-op casts.jdp1999-07-181-5/+5
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* Make the machdep.i8254_freq and machdep.tsc_freq sysctls modify thephk1999-04-251-3/+9
| | | | | | timecounter as well Asked for by: bde, jhay
* Don't open window for race condition.phk1999-04-021-4/+1
| | | | Detected by: Reg Clemens <reg@dwf.com>
* Fix an old cut&paste bogon.phk1999-03-121-2/+2
| | | | Noticed by: bde
* Remove duplicate include.phk1999-03-121-4/+1
| | | | Noticed by: bde
* Make even more of the PPSAPI implementations generic.phk1999-03-111-52/+147
| | | | | | | | FLL support in hardpps() Various magic shuffles and improved comments Style fixes from Bruce.
* Integrate the new "nanokernel" PLL from Dave Mills.phk1999-03-081-5/+2
| | | | | | | This code is backwards compatible with the older "microkernel" PLL, but allows ntpd v4 to use nanosecond resolution. Many other improvements. PPS_SYNC and hardpps() are NOT supported yet.
* Introduce machine-dependent macro pgtok() to convert page count to numberluoqi1999-02-191-5/+5
| | | | | of kilobytes. Its definition for each architecture could be optimized to avoid potential numerical overflows.
* Hide access to vmspace:vm_pmap with inline function vmspace_pmap(). Thisluoqi1999-02-191-3/+2
| | | | | | | is the preparation step for moving pmap storage out of vmspace proper. Reviewed by: Alan Cox <alc@cs.rice.edu> Matthew Dillion <dillon@apollo.backplane.com>
* Make the previous behaviour the default, add a sysctl which youphk1998-11-291-12/+42
| | | | | | | | | | | | | | can set if your hw/sw produces the "calcru negative..." message. Setting the alternate method (sysctl -w kern.timecounter.method=1) makes the the get{nano|micro}*() functions call the real thing at resulting in a measurable but minor overhead. I decided to NOT have the "calcru" change the method automatically because you should be aware of this problem if you have it. The problems currently seen, related to usleep and a few other corners are fixed for both methods.
* Make timecounters more resistant to badly behaved SW/HW which locksphk1998-11-231-10/+18
| | | | | | | | | | | out interrupts for too long. If you still see the "calcru: negative time..." message you can increase NTIMECOUNTER (see LINT). Sideeffect is that a timecounter is required to not wrap around in less than (1 + delta) seconds instead of the (1/hz + delta) required until now. Many thanks to: msmith, wpaul, wosch & bde
* Add a kludge to prevent panicing when using VM86 and hitting heresos1998-11-231-2/+2
| | | | | | with a NULL curproc. Originally by: Tor Egge (IIRC)
* Fixed breakage of the GPROF case of statclock() in the previous commit.bde1998-10-261-1/+2
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* Nitpicking and dusting performed on a train. Removes trivial warningsphk1998-10-251-3/+2
| | | | about unused variables, labels and other lint.
* Change the way we simulate stable storage for timecounters.phk1998-10-231-57/+52
| | | | | | If you have problems with the "calcru" messages and processes being killed for excessive cpu time, try to increase the NTIMECOUNTER #define and report your findings.
* Cast the return value of tvtohz() from a long to an int to satisfy thealex1998-10-061-2/+2
| | | | | | | compiler that we know what we're doing (the value returned has already been restricted to int ranges). Reviewed by: bde
* kern_clock.c:gibbs1998-09-151-18/+2
| | | | | | | Remove old disk statistics variables. vfs_bio.c: Enable bowrite now that B_ORDERED works for all buffer devices.
* Removed unused function hzto().bde1998-08-051-18/+1
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* Fixed printf format errors.bde1998-07-111-2/+2
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* Hmm, braino in last commit.phk1998-07-041-4/+5
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* Change the sign on a race-condition, so that instead of ending up severalphk1998-07-041-8/+18
| | | | | tens of milliseconds out in the future we end up the right place with a subweeniesecond error.
* When we transfer time from one timecounter to the next, use nanouptime(),phk1998-07-021-4/+4
| | | | | | not nanotime(); Otherwise we end up in 2026... Fix the arg to dummy_get_timecount()
* Add a tc_ prefix to struct timecounter members.phk1998-06-091-88/+92
| | | | Urged by: bde
* Add a member function more to the timecounters, this one is for usephk1998-06-071-6/+32
| | | | | with latch based PPS implementations. The client that uses it will be committed after more testing.
* Add a "this" style argument and a "void *private" so timecounters canphk1998-06-071-7/+7
| | | | figure out which instance to wount with.
* Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.phk1998-05-281-11/+16
| | | | | | | | | | | | | | | | | | | | 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
* Change a data type internal to the timecounters, and remove the "delta"phk1998-05-191-27/+14
| | | | | | function. Reviewed, but not entirely approved by: bde
* s/nanoruntime/nanouptime/gphk1998-05-171-6/+6
| | | | | | s/microruntime/microuptime/g Reviewed by: bde
* Minor adjustments to the timecounting and proc0.phk1998-04-081-3/+3
| | | | Mostly Submitted by: bde
* Make a kernel version of the timer* functions called timerval* to bephk1998-04-061-3/+3
| | | | | | more consistent. OK'ed by: bde
* Make the dummy timecounter run at 1 MHz rather than 100kHz (noticed by bde)phk1998-04-051-2/+2
| | | | fix the itimer(REAL) handling.
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