104:
998:
167:
version 5, but it was disabled by default for a time in favor of the traditional BSD scheduler until it reached maturity. The original BSD scheduler does not make full use of
1039:
208:
191:
environments, as well as interactive response under heavy load. The user may switch between the BSD scheduler and ULE using a kernel compile-time tunable.
634:
1063:
390:
691:
1032:
807:
679:
822:
422:
973:
1068:
953:
1025:
570:
968:
963:
454:
323:
75:
180:
172:
56:
349:
175:, which is important in modern computing environments. The primary goal of the ULE project is to make better use of
844:
176:
168:
616:
117:
265:
514:
469:
797:
737:
649:
491:
153:
1058:
542:
415:
923:
831:
575:
606:
802:
474:
459:
229:
782:
777:
449:
386:
380:
1009:
1005:
997:
792:
626:
594:
408:
160:
136:
124:
644:
565:
103:
908:
772:
767:
188:
163:(versions 7.1 and forward) for the i386 and AMD64 architectures. It was introduced in
1052:
856:
674:
582:
464:
301:
250:
903:
747:
599:
527:
184:
141:
876:
812:
669:
958:
851:
787:
659:
555:
327:
27:
913:
886:
881:
871:
866:
727:
664:
654:
948:
891:
861:
722:
717:
611:
441:
432:
164:
157:
129:
84:
400:
898:
742:
732:
712:
707:
684:
522:
936:
931:
587:
532:
944:
639:
560:
550:
499:
404:
940:
839:
382:
1013:
63:
183:
environments. ULE should improve performance in both
288:
922:
830:
821:
760:
700:
625:
541:
513:
490:
483:
440:
135:
123:
113:
74:
55:
36:
26:
1033:
416:
379:McKusick, M. K.; Neville-Neil, G. V. (2004).
8:
21:
1040:
1026:
827:
487:
423:
409:
401:
251:"FreeBSD 7.1-RELEASE Release Announcement"
102:
20:
354:Chapter 8 Configuring the FreeBSD Kernel
200:
16:Scheduler for FreeBSD operating system
266:"ULE: A Modern Scheduler for FreeBSD"
7:
994:
992:
302:"FreeBSD 7.0-RELEASE Release Notes"
1012:. You can help Knowledge (XXG) by
385:. Pearson Education. p. 153.
14:
996:
289:McKusick & Neville-Neil 2004
1064:Processor scheduling algorithms
1:
455:FreeBSD Documentation License
255:retrieved on 5 January 2009
61:3.0 (27 February 2008)
1085:
991:
291:, 4.4. Thread Scheduling.
70:
51:
40:26 January 2003
617:Highly Available STorage
209:"sched_ule(4) man page"
1069:Operating system stubs
1008:-related article is a
798:Marshall Kirk McKusick
974:PlayStation Vita OS
23:
954:Nintendo Switch OS
803:Diomidis Spinellis
475:Kernel Normal Form
460:FreeBSD Foundation
350:"FreeBSD Handbook"
28:Original author(s)
1021:
1020:
986:
985:
982:
981:
778:Poul-Henning Kamp
756:
755:
450:FreeBSD Core Team
392:978-0-321-68003-7
230:"FreeBSD CVS log"
147:
146:
1076:
1042:
1035:
1028:
1006:operating-system
1000:
993:
969:PlayStation 4 OS
964:PlayStation 3 OS
828:
488:
425:
418:
411:
402:
396:
365:
364:
362:
360:
346:
340:
339:
337:
335:
326:. Archived from
322:Roberson, Jeff.
319:
313:
312:
310:
308:
298:
292:
286:
280:
279:
277:
275:
270:
262:
256:
254:
247:
241:
240:
238:
236:
226:
220:
219:
217:
215:
205:
161:operating system
125:Operating system
106:
101:
98:
96:
94:
92:
90:
88:
86:
66:
47:
45:
24:
1084:
1083:
1079:
1078:
1077:
1075:
1074:
1073:
1049:
1048:
1047:
1046:
989:
987:
978:
918:
817:
752:
696:
621:
537:
509:
479:
470:Version History
436:
429:
399:
393:
378:
374:
369:
368:
358:
356:
348:
347:
343:
333:
331:
321:
320:
316:
306:
304:
300:
299:
295:
287:
283:
273:
271:
268:
264:
263:
259:
249:
248:
244:
234:
232:
228:
227:
223:
213:
211:
207:
206:
202:
197:
152:is the default
109:
83:
62:
43:
41:
37:Initial release
17:
12:
11:
5:
1082:
1080:
1072:
1071:
1066:
1061:
1051:
1050:
1045:
1044:
1037:
1030:
1022:
1019:
1018:
1001:
984:
983:
980:
979:
977:
976:
971:
966:
961:
956:
951:
934:
928:
926:
920:
919:
917:
916:
911:
909:Gentoo/FreeBSD
906:
901:
896:
895:
894:
889:
879:
874:
869:
864:
859:
854:
849:
848:
847:
836:
834:
825:
819:
818:
816:
815:
810:
805:
800:
795:
790:
785:
780:
775:
773:Jordan Hubbard
770:
768:Matthew Dillon
764:
762:
758:
757:
754:
753:
751:
750:
745:
740:
735:
730:
725:
720:
715:
710:
704:
702:
698:
697:
695:
694:
689:
688:
687:
682:
672:
667:
662:
657:
652:
647:
642:
637:
635:802.11 drivers
631:
629:
623:
622:
620:
619:
614:
609:
604:
603:
602:
592:
591:
590:
580:
579:
578:
573:
568:
563:
558:
547:
545:
539:
538:
536:
535:
530:
525:
519:
517:
515:Virtualisation
511:
510:
508:
507:
502:
496:
494:
485:
481:
480:
478:
477:
472:
467:
462:
457:
452:
446:
444:
438:
437:
430:
428:
427:
420:
413:
405:
398:
397:
391:
375:
373:
370:
367:
366:
341:
330:on 17 May 2008
314:
293:
281:
257:
242:
221:
199:
198:
196:
193:
189:multiprocessor
145:
144:
139:
133:
132:
127:
121:
120:
115:
111:
110:
108:
107:
80:
78:
72:
71:
68:
67:
59:
57:Stable release
53:
52:
49:
48:
38:
34:
33:
30:
15:
13:
10:
9:
6:
4:
3:
2:
1081:
1070:
1067:
1065:
1062:
1060:
1057:
1056:
1054:
1043:
1038:
1036:
1031:
1029:
1024:
1023:
1017:
1015:
1011:
1007:
1002:
999:
995:
990:
975:
972:
970:
967:
965:
962:
960:
959:OpenServer 10
957:
955:
952:
950:
946:
942:
938:
935:
933:
930:
929:
927:
925:
921:
915:
912:
910:
907:
905:
902:
900:
897:
893:
890:
888:
885:
884:
883:
880:
878:
875:
873:
870:
868:
865:
863:
860:
858:
857:DragonFly BSD
855:
853:
850:
846:
843:
842:
841:
838:
837:
835:
833:
829:
826:
824:
820:
814:
811:
809:
808:Robert Watson
806:
804:
801:
799:
796:
794:
791:
789:
786:
784:
781:
779:
776:
774:
771:
769:
766:
765:
763:
759:
749:
746:
744:
741:
739:
736:
734:
731:
729:
726:
724:
721:
719:
716:
714:
711:
709:
706:
705:
703:
699:
693:
690:
686:
683:
681:
678:
677:
676:
673:
671:
668:
666:
663:
661:
658:
656:
653:
651:
648:
646:
643:
641:
638:
636:
633:
632:
630:
628:
624:
618:
615:
613:
610:
608:
605:
601:
598:
597:
596:
593:
589:
586:
585:
584:
581:
577:
574:
572:
569:
567:
564:
562:
559:
557:
554:
553:
552:
549:
548:
546:
544:
540:
534:
531:
529:
526:
524:
521:
520:
518:
516:
512:
506:
505:ULE scheduler
503:
501:
498:
497:
495:
493:
489:
486:
482:
476:
473:
471:
468:
466:
465:FreeBSD Ports
463:
461:
458:
456:
453:
451:
448:
447:
445:
443:
439:
434:
426:
421:
419:
414:
412:
407:
406:
403:
394:
388:
384:
383:
377:
376:
371:
355:
351:
345:
342:
329:
325:
318:
315:
303:
297:
294:
290:
285:
282:
267:
261:
258:
252:
246:
243:
231:
225:
222:
210:
204:
201:
194:
192:
190:
186:
182:
178:
174:
170:
166:
162:
159:
155:
151:
143:
140:
138:
134:
131:
128:
126:
122:
119:
116:
112:
105:
100:
82:
81:
79:
77:
73:
69:
65:
60:
58:
54:
50:
39:
35:
32:Jeff Roberson
31:
29:
25:
22:ULE scheduler
19:
1059:BSD software
1014:expanding it
1003:
988:
904:GNU/kFreeBSD
600:Soft updates
504:
381:
357:. Retrieved
353:
344:
332:. Retrieved
328:the original
317:
305:. Retrieved
296:
284:
272:. Retrieved
260:
245:
233:. Retrieved
224:
212:. Retrieved
203:
185:uniprocessor
149:
148:
142:BSD 2-clause
18:
924:proprietary
877:MidnightBSD
832:open-source
823:Derivatives
813:Dru Lavigne
793:Sam Leffler
783:Mike Karels
334:2 September
214:2 September
64:[±]
1053:Categories
852:DesktopBSD
788:Ben Laurie
627:Networking
492:Scheduling
484:Subsystems
195:References
114:Written in
76:Repository
44:2003-01-26
645:Bluetooth
583:disklabel
324:"ULE 2.0"
235:27 August
154:scheduler
914:XigmaNAS
887:OPNsense
882:m0n0wall
872:GhostBSD
867:FreeSBIE
728:portsnap
665:Netgraph
655:IPFilter
359:18 March
156:for the
949:watchOS
892:pfSense
862:FreeNAS
723:OpenBSM
718:OpenPAM
543:Storage
442:FreeBSD
435:Project
433:FreeBSD
372:Sources
307:23 June
274:23 June
165:FreeBSD
158:FreeBSD
137:License
130:FreeBSD
42: (
947:, and
899:TrueOS
845:Darwin
761:People
748:systat
743:moused
733:kqueue
713:DTrace
708:busdma
685:pfsync
523:chroot
389:
95:/sched
1004:This
937:macOS
932:Junos
701:Other
588:fdisk
576:vinum
556:raid5
533:bhyve
269:(PDF)
93:/kern
1010:stub
945:tvOS
692:SCTP
680:CARP
670:NDIS
660:ipfw
640:ALTQ
571:LVM2
566:geli
561:GBDE
551:GEOM
528:jail
500:ALTQ
431:The
387:ISBN
361:2009
336:2008
309:2008
276:2008
237:2008
216:2008
187:and
179:and
97:_ule
91:/sys
941:iOS
840:XNU
738:KLD
650:BPF
612:ZFS
607:VFS
595:UFS
181:SMT
177:SMP
173:SMT
171:or
169:SMP
150:ULE
87:.su
85:bxr
1055::
943:,
939:,
675:pf
352:.
99:.c
89:/f
1041:e
1034:t
1027:v
1016:.
424:e
417:t
410:v
395:.
363:.
338:.
311:.
278:.
253:.
239:.
218:.
118:C
46:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
