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* Update to D25266, bin/ps: Make the rtprio option actually showKirk McKusick2020-07-141-0/+1
| | | | | | | | | | | | | | | | | realtime priorities The current `ps -axO rtprio' show threads running at interrupt priority such as the [intr] thread as '1:48' and threads running at kernel priority such as [pagedaemon] as normal:4294967260. This change shows [intr] as intr:48 and [pagedaemon] as kernel:4. Reviewed by: kib MFC after: 1 week (together with -r362369) Differential Revision: https://reviews.freebsd.org/D25660 Notes: svn path=/head/; revision=363192
* sys/sys: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-271-0/+2
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326256
* Replace (name) with Henric Vestergaard Draboel since it was clear thatWarner Losh2007-01-081-1/+1
| | | | | | | | this was just cut N paste and '(name)' doesn't make any sense. If someone knows how to contact Mr. Draboel, please let me know. Notes: svn path=/head/; revision=165898
* Threading cleanup.. part 2 of several.Julian Elischer2006-12-061-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | Make part of John Birrell's KSE patch permanent.. Specifically, remove: Any reference of the ksegrp structure. This feature was never fully utilised and made things overly complicated. All code in the scheduler that tried to make threaded programs fair to unthreaded programs. Libpthread processes will already do this to some extent and libthr processes already disable it. Also: Since this makes such a big change to the scheduler(s), take the opportunity to rename some structures and elements that had to be moved anyhow. This makes the code a lot more readable. The ULE scheduler compiles again but I have no idea if it works. The 4bsd scheduler still reqires a little cleaning and some functions that now do ALMOST nothing will go away, but I thought I'd do that as a separate commit. Tested by David Xu, and Dan Eischen using libthr and libpthread. Notes: svn path=/head/; revision=164936
* Make KSE a kernel option, turned on by default in all GENERICJohn Birrell2006-10-261-0/+6
| | | | | | | | | | kernel configs except sun4v (which doesn't process signals properly with KSE). Reviewed by: davidxu@ Notes: svn path=/head/; revision=163709
* Replace system call thr_getscheduler, thr_setscheduler, thr_setschedparamDavid Xu2006-09-211-0/+1
| | | | | | | | with rtprio_thread, while rtprio system call is for process only, the new system call rtprio_thread is responsible for LWP. Notes: svn path=/head/; revision=162497
* /* -> /*- for license, minor formatting changesWarner Losh2005-01-071-1/+1
| | | | Notes: svn path=/head/; revision=139825
* Remove __PAlfred Perlstein2002-03-191-1/+1
| | | | Notes: svn path=/head/; revision=92719
* In a threaded world, differnt priorirites become properties ofJulian Elischer2002-02-111-2/+3
| | | | | | | | | different entities. Make it so. Reviewed by: jhb@freebsd.org (john baldwin) Notes: svn path=/head/; revision=90538
* Implement a unified run queue and adjust priority levels accordingly.Jake Burkholder2001-02-121-29/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - All processes go into the same array of queues, with different scheduling classes using different portions of the array. This allows user processes to have their priorities propogated up into interrupt thread range if need be. - I chose 64 run queues as an arbitrary number that is greater than 32. We used to have 4 separate arrays of 32 queues each, so this may not be optimal. The new run queue code was written with this in mind; changing the number of run queues only requires changing constants in runq.h and adjusting the priority levels. - The new run queue code takes the run queue as a parameter. This is intended to be used to create per-cpu run queues. Implement wrappers for compatibility with the old interface which pass in the global run queue structure. - Group the priority level, user priority, native priority (before propogation) and the scheduling class into a struct priority. - Change any hard coded priority levels that I found to use symbolic constants (TTIPRI and TTOPRI). - Remove the curpriority global variable and use that of curproc. This was used to detect when a process' priority had lowered and it should yield. We now effectively yield on every interrupt. - Activate propogate_priority(). It should now have the desired effect without needing to also propogate the scheduling class. - Temporarily comment out the call to vm_page_zero_idle() in the idle loop. It interfered with propogate_priority() because the idle process needed to do a non-blocking acquire of Giant and then other processes would try to propogate their priority onto it. The idle process should not do anything except idle. vm_page_zero_idle() will return in the form of an idle priority kernel thread which is woken up at apprioriate times by the vm system. - Update struct kinfo_proc to the new priority interface. Deliberately change its size by adjusting the spare fields. It remained the same size, but the layout has changed, so userland processes that use it would parse the data incorrectly. The size constraint should really be changed to an arbitrary version number. Also add a debug.sizeof sysctl node for struct kinfo_proc. Notes: svn path=/head/; revision=72376
* Major update to the way synchronization is done in the kernel. HighlightsJason Evans2000-09-071-5/+28
| | | | | | | | | | | | | | | | | | 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
* Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"Peter Wemm1999-12-291-2/+2
| | | | | | | | | is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. Notes: svn path=/head/; revision=55205
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Finish _POSIX_PRIORITY_SCHEDULING. Needs P1003_1B andPeter Dufault1998-03-281-2/+2
| | | | | | | | | | | | | | | | | | | _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. Notes: svn path=/head/; revision=34925
* Reviewed by: bdePeter Dufault1998-03-081-11/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Changes to support building with _POSIX_SOURCE set to 199309L: 1. Add sys/_posix.h to handle those preprocessor defs that POSIX says have effects when defined before including any header files; 2. Change POSIX4_VISIBLE back to _POSIX4_VISIBLE 3. Add _POSIX4_VISIBLE_HISTORICALLY for pre-existing BSD features now defined in POSIX. These show up when: _POSIX_SOURCE and _POSIX_C_SOURCE are not set or _POSIX_C_SOURCE is set >= 199309L and vanish when: _POSIX_SOURCE is set or _POSIX_C_SOURCE is < 199309L. 4. Explain these in man 9 posix4; 5. Include _posix.h and conditionalize on new feature test. Notes: svn path=/head/; revision=34319
* Reviewed by: msmith, bde long agoPeter Dufault1998-03-041-1/+20
| | | | | | | | POSIX.4 headers and sysctl variables. Nothing should change unless POSIX4 is defined or _POSIX_VERSION is set to 199309. Notes: svn path=/head/; revision=34030
* 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
* "idle priority" support. Based on code from Henrik Vestergaard Draboel,David Greenman1994-10-021-6/+24
| | | | | | | but substantially rewritten by me. Notes: svn path=/head/; revision=3291
* Realtime priority scheduling support.David Greenman1994-09-011-0/+52
Submitted by: Henrik Vestergaard Draboel Notes: svn path=/head/; revision=2441