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* Partially revert revision 1.66, which contained a change that did notKris Kennaway2005-10-141-4/+4
| | | | | | | | | | | | | | | | | | | | | correspond to the commit log. It changed the maxswzone and maxbcache parameters from int to long, without changing the extern definitions in <sys/buf.h>. In fact it's a good thing it did not, because other parts of the system are not yet ready for this, and on large-memory sparc machines it causes severe filesystem damage if you try. The worst effect of the change was that the tunables controlling the above variables stopped working. These were necessary to allow such large sparc64 machines (with >12GB RAM) to boot, since sparc64 did not set a hard-coded upper limit on these parameters and they ended up overflowing an int, causing an infinite loop at boot in bufinit(). Reviewed by: mlaier Notes: svn path=/head/; revision=151342
* Increase default HZ for sparc64 to 1000.Marius Strobl2005-04-161-1/+1
| | | | Notes: svn path=/head/; revision=145154
* /* -> /*- for copyright notices, minor format tweaks as necessaryWarner Losh2005-01-061-1/+1
| | | | Notes: svn path=/head/; revision=139804
* Fix the build.Bruce M Simpson2004-11-301-2/+2
| | | | Notes: svn path=/head/; revision=138214
* Switch from 1024hz to 1000hz on amd64 to match i386. 1024 is a badPeter Wemm2004-11-301-3/+1
| | | | | | | choice because it is so in sync with stathz (128hz or 4096hz etc). Notes: svn path=/head/; revision=138211
* #include <vm/vm_param.h> instead of <machine/vmparam.h> (the formerDag-Erling Smørgrav2004-11-081-17/+17
| | | | | | | | | | | | | | | includes the latter, but also declares variables which are defined in kern/subr_param.c). Change som VM parameters from quad_t to unsigned long. They refer to quantities (size limits for text, heap and stack segments) which must necessarily be smaller than the size of the address space, so long is adequate on all platforms. MFC after: 1 week Notes: svn path=/head/; revision=137393
* Increase default HZ for ia64 to 1000.Marcel Moolenaar2004-11-081-1/+1
| | | | Notes: svn path=/head/; revision=137374
* Increase default HZ for i386 to 1000Poul-Henning Kamp2004-11-061-4/+6
| | | | Notes: svn path=/head/; revision=137307
* Remove advertising clause from University of California Regent's license,Warner Losh2004-04-051-4/+0
| | | | | | | | | per letter dated July 22, 1999. Approved by: core Notes: svn path=/head/; revision=127911
* White space and wording changes to init_param3().Alan Cox2004-03-301-5/+3
| | | | | | | Mostly submitted by: bde Notes: svn path=/head/; revision=127612
* Revise the direct or optimized case to use uiomove_fromphys() by the readerAlan Cox2004-03-271-6/+1
| | | | | | | | | | | | | | | | | | | | instead of ephemeral mappings using pmap_qenter() by the writer. The writer is still, however, responsible for wiring the pages, just not mapping them. Consequently, the allocation of KVA for the direct case is unnecessary. Remove it and the sysctls limiting it, i.e., kern.ipc.maxpipekvawired and kern.ipc.amountpipekvawired. The number of temporarily wired pages is still, however, limited by kern.ipc.maxpipekva. Note: On platforms lacking a direct virtual-to-physical mapping, uiomove_fromphys() uses sf_bufs to cache ephemeral mappings. Thus, the number of available sf_bufs can influence the performance of pipes on platforms such i386. Surprisingly, I saw the greatest gain from this change on such a machine: lmbench's pipe bandwidth result increased from ~1050MB/s to ~1850MB/s on my 2.4GHz, 400MHz FSB P4 Xeon. Notes: svn path=/head/; revision=127501
* Set default HZ to 1024 for amd64. The comment in kern/tty.c doesn'tPeter Wemm2004-03-141-0/+4
| | | | | | | | apply here because we have 64 bit longs and don't suffer the hz > 169 overflows. Notes: svn path=/head/; revision=126959
* More pipe changes:Mike Silbersack2003-08-111-10/+8
| | | | | | | | | | | | | | | | | From alc: Move pageable pipe memory to a seperate kernel submap to avoid awkward vm map interlocking issues. (Bad explanation provided by me.) From me: Rework pipespace accounting code to handle this new layout, and adjust our default values to account for the fact that we now have a solid limit on allocations. Also, remove the "maxpipes" limit, as it no longer has a purpose. (The limit on kva usage solves the problem of having two many pipes.) Notes: svn path=/head/; revision=118764
* Add init_param3() to subr_param. This function is calledMike Silbersack2003-07-111-26/+16
| | | | | | | | | | | immediately after the kernel map has been sized, and is the optimal place for the autosizing of memory allocations which occur within the kernel map to occur. Suggested by: bde Notes: svn path=/head/; revision=117391
* Pull in the entire kmem_map size calculation from kern_malloc, ratherMike Silbersack2003-07-081-3/+11
| | | | | | | | | | | | | than the shortcircuited version I had been using, which only worked properly on i386 & amd64. Also, change an autoscale constant to account for the more correct kmem_map size. Problem noticed by: mux Notes: svn path=/head/; revision=117338
* Put some concrete limits on pipe memory consumption:Mike Silbersack2003-07-081-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Limit the total number of pipes so that we do not exhaust all vm objects in the kernel map. When this limit is reached, a ratelimited message will be printed to the console. - Put a soft limit on the amount of memory consumable by pipes. Once the limit has been reached, all new pipes will be limited to 4K in size, rather than the default of 16K. - Put a limit on the number of pages that may be used for high speed page flipping in order to reduce the amount of wired memory. Pipe writes that occur while this limit is exceeded will fall back to non-page flipping mode. The above values are auto-tuned in subr_param.c and are scaled to take into account both the size of physical memory and the size of the kernel map. These limits help to reduce the "kernel resources exhausted" panics that could be caused by opening a large number of pipes. (Pipes alone are no longer able to exhaust all resources, but other kernel memory hogs in league with pipes may still be able to do so.) PR: 53627 Ideas / comments from: hsu, tjr, dillon@apollo.backplane.com MFC after: 1 week Notes: svn path=/head/; revision=117325
* Use __FBSDID().David E. O'Brien2003-06-111-1/+3
| | | | Notes: svn path=/head/; revision=116182
* Change hw.physmem and hw.usermem to unsigned long like they used to bePeter Wemm2002-08-301-1/+1
| | | | | | | | | | | | | | | | in the original hardwired sysctl implementation. The buf size calculator still overflows an integer on machines with large KVA (eg: ia64) where the number of pages does not fit into an int. Use 'long' there. Change Maxmem and physmem and related variables to 'long', mostly for completeness. Machines are not likely to overflow 'int' pages in the near term, but then again, 640K ought to be enough for anybody. This comes for free on 32 bit machines, so why not? Notes: svn path=/head/; revision=102600
* Improve the implementation of adjtime(2).Poul-Henning Kamp2002-04-151-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Apply the change as a continuous slew rather than as a series of discrete steps and make it possible to adjust arbitraryly huge amounts of time in either direction. In practice this is done by hooking into the same once-per-second loop as the NTP PLL and setting a suitable frequency offset deducting the amount slewed from the remainder. If the remaining delta is larger than 1 second we slew at 5000PPM (5msec/sec), for a delta less than a second we slew at 500PPM (500usec/sec) and for the last one second period we will slew at whatever rate (less than 500PPM) it takes to eliminate the delta entirely. The old implementation stepped the clock a number of microseconds every HZ to acheive the same effect, using the same rates of change. Eliminate the global variables tickadj, tickdelta and timedelta and their various use and initializations. This removes the most significant obstacle to running timecounter and NTP housekeeping from a timeout rather than hardclock. Notes: svn path=/head/; revision=94754
* Unconditionally limit maxproc so that it is not possibleMike Silbersack2002-03-071-0/+6
| | | | | | | | | | | to exhaust all kmaps. The only reward for setting maxproc to a value which will cause kmap exhaustion is a panic during a forkbomb attack. MFC after: 3 days Notes: svn path=/head/; revision=91780
* Allow the kern.maxusers boot tuneable to be set to 0 (previously onlyMatthew Dillon2002-02-061-2/+3
| | | | | | | | | the kernel config's maxusers could be set to 0 for autosizing to work). Reviewed by: rwatson, imp MFC after: 3 days Notes: svn path=/head/; revision=90274
* Make the 'maxusers 0' auto-sizing code slightly more conservative. ChangeMatthew Dillon2002-01-251-3/+3
| | | | | | | | | | | | | from 1 megabyte of ram per user to 2 megabytes of ram per user, and reduce the cap from 512 to 384. 512 leaves around 240 MB of KVM available while 384 leaves 270 MB of KVM available. Available KVM is important in order to deal with zalloc and kernel malloc area growth. Reviewed by: mckusick MFC: either before 4.5 if re's agree, or after 4.5 Notes: svn path=/head/; revision=89769
* Proper fix for old config setting maxusers to 8.Peter Wemm2001-12-141-1/+1
| | | | Notes: svn path=/head/; revision=87860
* Too many people are compiling kernels with maxusers set to 0 without the newMatthew Dillon2001-12-141-1/+1
| | | | | | | config. Hack the kernel to force auto-sizing if the old config is used. Notes: svn path=/head/; revision=87839
* Limit maxprocperuid to 9/10 maxproc, and limit maxfilesperproc to 9/10Mike Silbersack2001-12-131-2/+2
| | | | | | | | | | maxfiles. This should make local resource exhaustion attacks easier to handle with a non-tweaked setup. MFC after: 3 days Notes: svn path=/head/; revision=87817
* Allow maxusers to be specified as 0 in the kernel config, which willMatthew Dillon2001-12-091-18/+40
| | | | | | | | | | cause the system to auto-size to between 32 and 512 depending on the amount of memory. MFC after: 1 week Notes: svn path=/head/; revision=87546
* Create a mutex pool API for short term leaf mutexes.Matthew Dillon2001-11-131-8/+0
| | | | | | | | Replace the manual mutex pool in kern_lock.c (lockmgr locks) with the new API. Replace the mutexes embedded in sxlocks with the new API. Notes: svn path=/head/; revision=86333
* Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loaderPaul Saab2001-10-101-0/+21
| | | | | | | | | | tunable. Reviewed by: peter MFC after: 2 weeks Notes: svn path=/head/; revision=84783
* Conditionalize VM_SWZONE_SIZE_MAX and VM_BCACHE_SIZE_MAX so MD sectionsMatthew Dillon2001-08-201-0/+4
| | | | | | | that don't define these constants don't break. Notes: svn path=/head/; revision=81986
* Limit the amount of KVM reserved for the buffer cache and for swap-metaMatthew Dillon2001-08-201-0/+6
| | | | | | | | | | | | | | | | | | information. The default limits only effect machines with > 1GB of ram and can be overriden with two new kernel conf variables VM_SWZONE_SIZE_MAX and VM_BCACHE_SIZE_MAX, or with loader variables kern.maxswzone and kern.maxbcache. This has the effect of leaving more KVM available for sizing NMBCLUSTERS and 'maxusers' and should avoid tripups where a sysad adds memory to a machine and then sees the kernel panic on boot due to running out of KVM. Also change the default swap-meta auto-sizing calculation to allocate half of what it was previously allocating. The prior defaults were way too high. Note that we cannot afford to run out of swap-meta structures so we still stay somewhat conservative here. Notes: svn path=/head/; revision=81933
* Move param.c out of the conf directory and make it fully dynamic.Peter Wemm2001-07-261-27/+49
| | | | | | | | | Tunables are now derived at boot time from maxusers. ie: change maxusers via a tunable and all the derivative settings change. You can change the other tunables individually as well. Even hz etc is tunable. Notes: svn path=/head/; revision=80418
* Introduce numerous SMP friendly changes to the mbuf allocator. Namely,Bosko Milekic2001-06-221-10/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | introduce a modified allocation mechanism for mbufs and mbuf clusters; one which can scale under SMP and which offers the possibility of resource reclamation to be implemented in the future. Notable advantages: o Reduce contention for SMP by offering per-CPU pools and locks. o Better use of data cache due to per-CPU pools. o Much less code cache pollution due to excessively large allocation macros. o Framework for `grouping' objects from same page together so as to be able to possibly free wired-down pages back to the system if they are no longer needed by the network stacks. Additional things changed with this addition: - Moved some mbuf specific declarations and initializations from sys/conf/param.c into mbuf-specific code where they belong. - m_getclr() has been renamed to m_get_clrd() because the old name is really confusing. m_getclr() HAS been preserved though and is defined to the new name. No tree sweep has been done "to change the interface," as the old name will continue to be supported and is not depracated. The change was merely done because m_getclr() sounds too much like "m_get a cluster." - TEMPORARILY disabled mbtypes statistics displaying in netstat(1) and systat(1) (see TODO below). - Fixed systat(1) to display number of "free mbufs" based on new per-CPU stat structures. - Fixed netstat(1) to display new per-CPU stats based on sysctl-exported per-CPU stat structures. All infos are fetched via sysctl. TODO (in order of priority): - Re-enable mbtypes statistics in both netstat(1) and systat(1) after introducing an SMP friendly way to collect the mbtypes stats under the already introduced per-CPU locks (i.e. hopefully don't use atomic() - it seems too costly for a mere stat update, especially when other locks are already present). - Optionally have systat(1) display not only "total free mbufs" but also "total free mbufs per CPU pool." - Fix minor length-fetching issues in netstat(1) related to recently re-enabled option to read mbuf stats from a core file. - Move reference counters at least for mbuf clusters into an unused portion of the cluster itself, to save space and need to allocate a counter. - Look into introducing resource freeing possibly from a kproc. Reviewed by (in parts): jlemon, jake, silby, terry Tested by: jlemon (Intel & Alpha), mjacob (Intel & Alpha) Preliminary performance measurements: jlemon (and me, obviously) URL: http://people.freebsd.org/~bmilekic/mb_alloc/ Notes: svn path=/head/; revision=78592
* Remove unneeded <stddef.h> #includes.Poul-Henning Kamp2000-10-291-2/+0
| | | | Notes: svn path=/head/; revision=67899
* For lockmgr mutex protection, use an array of mutexes that are allocatedJason Evans2000-10-121-0/+8
| | | | | | | | | | | | and initialized during boot. This avoids bloating sizeof(struct lock). As a side effect, it is no longer necessary to enforce the assumtion that lockinit()/lockdestroy() calls are paired, so the LK_VALID flag has been removed. Idea taken from: BSD/OS. Notes: svn path=/head/; revision=67046
* Move the MSG* and SEM* options to opt_sysvipc.hPeter Wemm2000-05-011-45/+0
| | | | | | | | | | | | | | | | | | Remove evil allocation macros from machdep.c (why was that there???) and use malloc() instead. Move paramters out of param.h and into the code itself. Move a bunch of internal definitions from public sys/*.h headers (without #ifdef _KERNEL even) into the code itself. I had hoped to make some of this more dynamic, but the cost of doing wakeups on all sleeping processes on old arrays was too frightening. The other possibility is to initialize on the first use, and allow dynamic sysctl changes to parameters right until that point. That would allow /etc/rc.sysctl to change SEM* and MSG* defaults as we presently do with SHM*, but without the nightmare of changing a running system. Notes: svn path=/head/; revision=59839
* Make sysv-style shared memory tuneable params fully runtime adjustablePeter Wemm2000-03-301-33/+0
| | | | | | | | | | | via sysctl. It's done pretty simply but it should be quite adequate. Also move SHMMAXPGS from $machine/include/vmparam.h as the comments that went with it were wrong... we don't allocate KVM space for the pages so that comment is bogus.. The only practical limit is how much physical ram you want to lock up as this stuff isn't paged out or swap backed. Notes: svn path=/head/; revision=58820
* This is Bosko Milekic's mbuf allocation waiting code. Basically, thisBrian Feldman1999-12-121-0/+1
| | | | | | | | | | | means that running out of mbuf space isn't a panic anymore, and code which runs out of network memory will sleep to wait for it. Submitted by: Bosko Milekic <bmilekic@dsuper.net> Reviewed by: green, wollman Notes: svn path=/head/; revision=54478
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Move the initialisation/tuning of nmbclusters from param.c/machdep.cMike Smith1999-07-051-17/+1
| | | | | | | | | | | | | | | | | | into uipc_mbuf.c. This reduces three sets of identical tunable code to one set, and puts the initialisation with the mbuf code proper. Make NMBUFs tunable as well. Move the nmbclusters sysctl here as well. Move the initialisation of maxsockets from param.c to uipc_socket2.c, next to its corresponding sysctl. Use the new tunable macros for the kern.vm.kmem.size tunable (this should have been in a separate commit, whoops). Notes: svn path=/head/; revision=48579
* Allow setting MAXFILES in the kernel config.Dag-Erling Smørgrav1999-04-091-1/+3
| | | | Notes: svn path=/head/; revision=45515
* Fixed problems with kernel config file overrides of sysv semaphoreMatthew Dillon1998-12-141-1/+3
| | | | | | | | | | parameters. Prior to this fix a kernel config override would effect only some of the kernel files, resulting in panics. PR: kern/9068 Notes: svn path=/head/; revision=41774
* Implemented zero-copy TCP/IP extensions via sendfile(2) - send aDavid Greenman1998-11-051-1/+7
| | | | | | | | | | | | | | file to a stream socket. sendfile(2) is similar to implementations in HP-UX, Linux, and other systems, but the API is more extensive and addresses many of the complaints that the Apache Group and others have had with those other implementations. Thanks to Marc Slemko of the Apache Group for helping me work out the best API for this. Anyway, this has the "net" result of speeding up sends of files over TCP/IP sockets by about 10X (that is to say, uses 1/10th of the CPU cycles) when compared to a traditional read/write loop. Notes: svn path=/head/; revision=40931
* Moved definition of fscale from param.c to kern_synch.c where itBruce Evans1998-07-111-6/+1
| | | | | | | | should always have been (it has no user-servicable parts even at compile time) and staticized it. Notes: svn path=/head/; revision=37565
* Add 3 sysctl variables for future use by ps)1_Poul-Henning Kamp1998-06-301-1/+4
| | | | Notes: svn path=/head/; revision=37315
* Round tickadj up. This prevents tickadj from being 0 when HZ > 500,Bruce Evans1998-06-211-2/+2
| | | | | | | | | | | | which makes adjtime(2) useless and confuses xntpd(8) into refusing to start even when it would use the kernel PLL instead of adjtime(). The result is the same as recommended by tickadj(8), at least when HZ divides 10^6. Of course, you wouldn't want to actually use adjtime() when HZ is large. In the silly boundary case of HZ == 10^6, tickadj == tick == 1 so the clock stops while adjtime() is active. Notes: svn path=/head/; revision=37087
* Convert socket structures to be type-stable and add a version number.Garrett Wollman1998-05-151-1/+8
| | | | | | | | | | | | | | | | | | | | | | Define a parameter which indicates the maximum number of sockets in a system, and use this to size the zone allocators used for sockets and for certain PCBs. Convert PF_LOCAL PCB structures to be type-stable and add a version number. Define an external format for infomation about socket structures and use it in several places. Define a mechanism to get all PF_LOCAL and PF_INET PCB lists through sysctl(3) without blocking network interrupts for an unreasonable length of time. This probably still has some bugs and/or race conditions, but it seems to work well enough on my machines. It is now possible for `netstat' to get almost all of its information via the sysctl(3) interface rather than reading kmem (changes to follow). Notes: svn path=/head/; revision=36079
* Raise ncallout from NPROC + 16 to NPROC + 16 + MAXFILES. This sholdGuido van Rooij1998-02-271-4/+5
| | | | | | | | | prevent a possible DOS attack. The proper fix (to dynamically grow the callout list) is in the make. Submitted by: Paul Traina Notes: svn path=/head/; revision=33882
* Removed unused #includes.Bruce Evans1997-06-141-12/+1
| | | | Notes: svn path=/head/; revision=26638
* 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
* Removed option EXTRAVNODES. All versions of FreeBSD-2.x have a sysctlBruce Evans1997-01-161-5/+0
| | | | | | | | | variable `kern.maxvnodes' which gives much better control over vnode allocation than EXTRAVNODES (except in -current between 1995/10/28 and 1996/11/12, kern.maxvnodes was read-only and thus useless). Notes: svn path=/head/; revision=21770
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