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* Fix an old bug related to BETTER_CLOCK. Call forward_*clock if SMPjhb2001-04-171-3/+3
| | | | | | | | | and __i386__ are defined rather than if SMP and BETTER_CLOCK are defined. The removal of BETTER_CLOCK would have broken this except that kern_clock.c doesn't include <machine/smptests.h>, so it doesn't see the definition of BETTER_CLOCK, and forward_*clock aren't called, even on 4.x. This seems to fix the problem where a n-way SMP system would see 100 * n clk interrupts and 128 * n rtc interrupts.
* Catch up to header include changes:jhb2001-03-281-1/+1
| | | | | - <sys/mutex.h> now requires <sys/systm.h> - <sys/mutex.h> and <sys/sx.h> now require <sys/lock.h>
* Changed the aston() family to operate on a specified process instead ofbde2001-02-191-2/+2
| | | | | | | | | | | | | | always on curproc. This is needed to implement signal delivery properly (see a future log message for kern_sig.c). Debogotified the definition of aston(). aston() was defined in terms of signotify() (perhaps because only the latter already operated on a specified process), but aston() is the primitive. Similar changes are needed in the ia64 versions of cpu.h and trap.c. I didn't make them because the ia64 is missing the prerequisite changes to make astpending and need_resched per-process and those changes are too large to make without testing.
* - Catch up to the new swi API changes:jhb2001-02-091-2/+2
| | | | | | | - Use swi_* function names. - Use void * to hold cookies to handlers instead of struct intrhand *. - In sio.c, use 'driver_name' instead of "sio" as the name of the driver lock to minimize diffs with cy(4).
* Change and clean the mutex lock interface.bmilekic2001-02-091-14/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order)
* - Proc locking.jhb2001-01-241-7/+20
| | | | - P_FOO -> PS_FOO.
* Use PCPU_GET, PCPU_PTR and PCPU_SET to access all per-cpu variablesjake2001-01-101-2/+2
| | | | other then curproc.
* o Export cp_time ("CPU time statistics") using SYSCTL_OPAQUE.rwatson2000-11-201-0/+3
| | | | | This removes a reason that systat requires setgid kmem. More to come.
* - Protect the callout wheel with a separate spin mutex, callout_lock.jake2000-11-191-2/+12
| | | | | | | | | | | - Use the mutex in hardclock to ensure no races between it and softclock. - Make softclock be INTR_MPSAFE and provide a flag, CALLOUT_MPSAFE, which specifies that a callout handler does not need giant. There is still no way to set this flag when regstering a callout. Reviewed by: -smp@, jlemon
* - Overhaul the software interrupt code to use interrupt threads for eachjhb2000-10-251-1/+3
| | | | | | | | | | | | | | | | | | | type of software interrupt. Roughly, what used to be a bit in spending now maps to a swi thread. Each thread can have multiple handlers, just like a hardware interrupt thread. - Instead of using a bitmask of pending interrupts, we schedule the specific software interrupt thread to run, so spending, NSWI, and the shandlers array are no longer needed. We can now have an arbitrary number of software interrupt threads. When you register a software interrupt thread via sinthand_add(), you get back a struct intrhand that you pass to sched_swi() when you wish to schedule your swi thread to run. - Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit more intuitive. Also, prefix all the members of struct intrhand with 'ih_'. - Make swi_net() a MI function since there is now no point in it being MD. Submitted by: cp
* 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.
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