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* Don't #error if we are lint.Poul-Henning Kamp2002-10-011-0/+2
| | | | Notes: svn path=/head/; revision=104285
* more caddr_t removal.Alfred Perlstein2002-06-291-2/+2
| | | | Notes: svn path=/head/; revision=99012
* Remove __P.Alfred Perlstein2002-03-191-1/+1
| | | | Notes: svn path=/head/; revision=92723
* - Change all callers of addupc_task() to check PS_PROFIL explicitly andJohn Baldwin2001-12-181-2/+1
| | | | | | | | | | | remove the check from addupc_task(). It would need sched_lock while testing the flag anyways. - Always read sticks while holding sched_lock using a temporary variable where needed. - Always init prticks to 0 in ast() to quiet a warning. Notes: svn path=/head/; revision=88119
* Modify the critical section API as follows:John Baldwin2001-12-181-6/+4
| | | | | | | | | | | | | | | | | | | | | | - The MD functions critical_enter/exit are renamed to start with a cpu_ prefix. - MI wrapper functions critical_enter/exit maintain a per-thread nesting count and a per-thread critical section saved state set when entering a critical section while at nesting level 0 and restored when exiting to nesting level 0. This moves the saved state out of spin mutexes so that interlocking spin mutexes works properly. - Most low-level MD code that used critical_enter/exit now use cpu_critical_enter/exit. MI code such as device drivers and spin mutexes use the MI wrappers. Note that since the MI wrappers store the state in the current thread, they do not have any return values or arguments. - mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is assigned to curthread->td_savecrit during fork_exit(). Tested on: i386, alpha Notes: svn path=/head/; revision=88088
* Add kmupetext(), a function that expands the range of memory coveredBrian Feldman2001-10-301-5/+64
| | | | | | | | | | | | by the profiler on a running system. This is not done sparsely, as memory is cheaper than processor speed and each gprof mcount() and mexitcount() operation is already very expensive. Obtained from: NAI Labs CBOSS project Funded by: DARPA Notes: svn path=/head/; revision=85733
* KSE Milestone 2Julian Elischer2001-09-121-11/+12
| | | | | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha Notes: svn path=/head/; revision=83366
* Pushdown Giant for: profil(), ntp_adjtime(), ogethostname(),Matthew Dillon2001-09-011-4/+14
| | | | | | | osethostname(), ogethostid(), osethostid() Notes: svn path=/head/; revision=82717
* - Close races with signals and other AST's being triggered while we are inJohn Baldwin2001-08-101-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | the process of exiting the kernel. The ast() function now loops as long as the PS_ASTPENDING or PS_NEEDRESCHED flags are set. It returns with preemption disabled so that any further AST's that arrive via an interrupt will be delayed until the low-level MD code returns to user mode. - Use u_int's to store the tick counts for profiling purposes so that we do not need sched_lock just to read p_sticks. This also closes a problem where the call to addupc_task() could screw up the arithmetic due to non-atomic reads of p_sticks. - Axe need_proftick(), aston(), astoff(), astpending(), need_resched(), clear_resched(), and resched_wanted() in favor of direct bit operations on p_sflag. - Fix up locking with sched_lock some. In addupc_intr(), use sched_lock to ensure pr_addr and pr_ticks are updated atomically with setting PS_OWEUPC. In ast() we clear pr_ticks atomically with clearing PS_OWEUPC. We also do not grab the lock just to test a flag. - Simplify the handling of Giant in ast() slightly. Reviewed by: bde (mostly) Notes: svn path=/head/; revision=81493
* We don't need to hold a lock just to test a flag.John Baldwin2001-06-061-5/+1
| | | | Notes: svn path=/head/; revision=77840
* Remove unneeded includes of sys/ipl.h and machine/ipl.h.John Baldwin2001-05-151-1/+0
| | | | Notes: svn path=/head/; revision=76650
* Undo part of the tangle of having sys/lock.h and sys/mutex.h included inMark Murray2001-05-011-0/+2
| | | | | | | | | | | | | | other "system" header files. Also help the deprecation of lockmgr.h by making it a sub-include of sys/lock.h and removing sys/lockmgr.h form kernel .c files. Sort sys/*.h includes where possible in affected files. OK'ed by: bde (with reservations) Notes: svn path=/head/; revision=76166
* Switch from save/disable/restore_intr() to critical_enter/exit().John Baldwin2001-03-281-4/+3
| | | | Notes: svn path=/head/; revision=74903
* Since the PC is a pointer to a code address, change the second parameter ofJohn Baldwin2001-02-221-2/+2
| | | | | | | addupc_task() and addupc_intr() to be a uintptr_t instead of a u_long. Notes: svn path=/head/; revision=72912
* Change and clean the mutex lock interface.Bosko Milekic2001-02-091-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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) Notes: svn path=/head/; revision=72200
* - Catch up to proc flag changes.John Baldwin2001-01-241-2/+6
| | | | Notes: svn path=/head/; revision=71565
* Convert more malloc+bzero to malloc+M_ZERO.David Malone2000-12-081-2/+1
| | | | | | | | Submitted by: josh@zipperup.org Submitted by: Robert Drehmel <robd@gmx.net> Notes: svn path=/head/; revision=69781
* Hide intrstate in the #ifdef where it belongs.Poul-Henning Kamp2000-12-071-1/+1
| | | | Notes: svn path=/head/; revision=69731
* Catch up to moving headers:John Baldwin2000-10-201-1/+1
| | | | | | | | - machine/ipl.h -> sys/ipl.h - machine/mutex.h -> sys/mutex.h Notes: svn path=/head/; revision=67365
* Major update to the way synchronization is done in the kernel. HighlightsJason Evans2000-09-071-1/+3
| | | | | | | | | | | | | | | | | | 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 Notes: svn path=/head/; revision=65557
* Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.Poul-Henning Kamp2000-07-041-1/+1
| | | | | | | Pointed out by: bde Notes: svn path=/head/; revision=62573
* Style police catches up with rev 1.26 of src/sys/sys/sysctl.h:Poul-Henning Kamp2000-07-031-1/+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) Notes: svn path=/head/; revision=62454
* Commit major SMP cleanups and move the BGL (big giant lock) in theMatthew Dillon2000-03-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | syscall path inward. A system call may select whether it needs the MP lock or not (the default being that it does need it). A great deal of conditional SMP code for various deadended experiments has been removed. 'cil' and 'cml' have been removed entirely, and the locking around the cpl has been removed. The conditional separately-locked fast-interrupt code has been removed, meaning that interrupts must hold the CPL now (but they pretty much had to anyway). Another reason for doing this is that the original separate-lock for interrupts just doesn't apply to the interrupt thread mechanism being contemplated. Modifications to the cpl may now ONLY occur while holding the MP lock. For example, if an otherwise MP safe syscall needs to mess with the cpl, it must hold the MP lock for the duration and must (as usual) save/restore the cpl in a nested fashion. This is precursor work for the real meat coming later: avoiding having to hold the MP lock for common syscalls and I/O's and interrupt threads. It is expected that the spl mechanisms and new interrupt threading mechanisms will be able to run in tandem, allowing a slow piecemeal transition to occur. This patch should result in a moderate performance improvement due to the considerable amount of code that has been removed from the critical path, especially the simplification of the spl*() calls. The real performance gains will come later. Approved by: jkh Reviewed by: current, bde (exception.s) Some work taken from: luoqi's patch Notes: svn path=/head/; revision=58717
* Unremove used includes.Bruce Evans1999-10-121-0/+2
| | | | | | | | Bugs in test coverage should be fixed before removing any includes. LINT should be configured for full profiling support. Notes: svn path=/head/; revision=52147
* Trim unused options (or #ifdef for undoc options).Peter Wemm1999-10-111-2/+0
| | | | | | | Submitted by: phk Notes: svn path=/head/; revision=52128
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Fixed profiling of elf kernels. Made high resolution profiling compileBruce Evans1999-05-061-2/+5
| | | | | | | | | | | | | | | for elf kernels (it is broken for all kernels due to lack of egcs support). Renaming of many assembler labels is avoided by declaring by declaring the labels that need to be visible to gprof as having type "function" and depending on the elf version of gprof being zealous about discarding the others. A few type declarations are still missing, mainly for SMP. PR: 9413 Submitted by: Assar Westerlund <assar@sics.se> (initial parts) Notes: svn path=/head/; revision=46548
* Fixed bogotification of pseudocode for syscall args by rev.1.53 ofBruce Evans1998-09-051-3/+3
| | | | | | | syscalls.master. Notes: svn path=/head/; revision=38864
* Changed to the C9x draft spelling of the (unsigned) integral typeBruce Evans1998-07-141-4/+4
| | | | | | | | | | | suitable for holding object pointers (ptrint_t -> uintptr_t). Added corresponding signed type (intptr_t). Changed/added corresponding non-C9x types for function pointers to match. Don't use nonstandard types to implement these types, and don't comment on them in <machine/types.h>. Notes: svn path=/head/; revision=37629
* Oops, the previous commit should have changed `i386' to `__i386__',Bruce Evans1998-05-011-3/+3
| | | | | | | not `__i386'. Notes: svn path=/head/; revision=35596
* Support compiling with `gcc -ansi'.Bruce Evans1998-04-151-10/+10
| | | | Notes: svn path=/head/; revision=35210
* Move the "retval" (3rd) parameter from all syscall functions and putPoul-Henning Kamp1997-11-061-3/+2
| | | | | | | | | | | | | | | it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled. Notes: svn path=/head/; revision=30994
* Moved declaration of etext from <machine/md_var.h> to <machine/cpu.h>Bruce Evans1997-10-271-4/+1
| | | | | | | | | | | and fixed everything that dependended on it being declared in the old place. It is used in "machine-independent" code in subr_prof.c. Moved declaration of btext from subr_prof.c to <machine/cpu.h>. It is machine-dependent. Notes: svn path=/head/; revision=30789
* Last major round (Unless Bruce thinks of somthing :-) of malloc changes.Poul-Henning Kamp1997-10-121-2/+2
| | | | | | | | | | | Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde Notes: svn path=/head/; revision=30354
* Distribute and statizice a lot of the malloc M_* types.Poul-Henning Kamp1997-10-111-1/+3
| | | | | | | Substantial input from: bde Notes: svn path=/head/; revision=30309
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notPeter Wemm1997-02-221-1/+1
| | | | | | | ready for it yet. Notes: svn path=/head/; revision=22975
* Make the long-awaited change from $Id$ to $FreeBSD$Jordan K. Hubbard1997-01-141-1/+1
| | | | | | | | | | | 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. Notes: svn path=/head/; revision=21673
* Fixed magic and wrong numbers in calibration of nullfunc_loop_profiled()Bruce Evans1996-12-131-13/+10
| | | | | | | | and removed related debugging code. Now this part of the calibration is almost as machine-independent as gprof generally. Notes: svn path=/head/; revision=20396
* Improved non-statistical (GUPROF) profiling:Bruce Evans1996-10-171-37/+149
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - 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 Notes: svn path=/head/; revision=19000
* Implemented non-statistical kernel profiling. This is based onBruce Evans1995-12-291-5/+90
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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. Notes: svn path=/head/; revision=13107
* Unstaticized addupc_task(). It is supposed to be called from trap().Bruce Evans1995-12-261-2/+2
| | | | | | | | | | | | | See the comments for addupc_intr() and the NetBSD implementation. We use dummy versions of fuswintr() and susiwintr(), so addupc_intr() always pushes the work to trap() (this is inefficient), and trap() calls the special i386 function addupc() instead of addupc_task(). addupc() is more efficient than addupc_intr(), so some of the lost efficiency is recovered. However, addupc() may be broken on plain i386's since it doesn't check for write permission like copyout(). Notes: svn path=/head/; revision=13017
* A Major staticize sweep. Generates a couple of warnings that I'll dealPoul-Henning Kamp1995-12-141-2/+2
| | | | | | | | | with later. A number of unused vars removed. A number of unused procs removed or #ifdefed. Notes: svn path=/head/; revision=12819
* Removed unnecessary #includes of vm stuff. Most of them were onceBruce Evans1995-12-061-3/+2
| | | | | | | | | | prerequisites for <sys/sysctl.h>. subr_prof.c: Also replaced #include of <sys/user.h> by #include of <sys/resourcevar.h>. Notes: svn path=/head/; revision=12657
* Finished (?) cleaning up sysinit stuff.Bruce Evans1995-12-021-3/+3
| | | | Notes: svn path=/head/; revision=12569
* Mega commit for sysctl.Poul-Henning Kamp1995-11-201-17/+15
| | | | | | | | | Convert the remaining sysctl stuff to the new way of doing things. the devconf stuff is the reason for the large number of files. Cleaned up some compiler warnings while I were there. Notes: svn path=/head/; revision=12429
* Included <sys/sysproto.h> to get central declarations for syscall argsBruce Evans1995-11-121-1/+4
| | | | | | | | | | | | | structs and prototypes for syscalls. Ifdefed duplicated decentralized declarations of args structs. It's convenient to have this visible but they are hard to maintain. Some are already different from the central declarations. 4.4lite2 puts them in comments in the function headers but I wanted to avoid the large changes for that. Notes: svn path=/head/; revision=12221
* Fixed init functions argument type - caddr_t -> void *. Fixed a couple ofDavid Greenman1995-09-091-3/+3
| | | | | | | compiler warnings. Notes: svn path=/head/; revision=10653
* kmstartup had the wrong type and unnecessarily external linkage for aBruce Evans1995-08-291-9/+5
| | | | | | | | | | sysinit function. subr_prof.c: Remove useless comment. Notes: svn path=/head/; revision=10407
* Reviewed by: julian with quick glances by bruce and othersJulian Elischer1995-08-281-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | 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. Notes: svn path=/head/; revision=10358
* Add and move declarations to fix all of the warnings from `gcc -Wimplicit'Bruce Evans1995-03-161-1/+4
| | | | | | | | | (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. Notes: svn path=/head/; revision=7090
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