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2026-05-15 - 04:03
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack0slot2.osadl.org (updated Fri May 15, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40738032960,1sleep40-21swapper/400:13:004
339123325949,7sleep40-21swapper/419:06:344
339102525746,7sleep50-21swapper/519:03:385
3391647995249,2cyclictest3629766-21kworker/u16:0+flush-8:021:08:275
3391647994240,2cyclictest3710773-21kworker/u16:0+events_unbound21:48:295
33911612416,30sleep70-21swapper/719:05:327
3391647994037,2cyclictest3481816-21kworker/u16:2+events_unbound20:13:145
3391654993933,5cyclictest3433706-21latency_hist19:28:017
3391647993735,2cyclictest3855841-21kworker/u16:2+events_unbound22:51:465
3391647993735,2cyclictest3650200-21kworker/u16:3+events_unbound22:04:505
3391647993634,2cyclictest3928451-21kworker/u16:4+events_unbound23:36:215
3391647993634,2cyclictest3855841-21kworker/u16:2+events_unbound00:11:535
3391647993634,2cyclictest3820702-21kworker/u16:0+events_unbound23:49:215
3391647993634,2cyclictest3820702-21kworker/u16:0+events_unbound22:34:425
3391647993634,2cyclictest3820702-21kworker/u16:0+events_unbound22:34:425
3391647993634,2cyclictest3646893-21kworker/u16:2+events_unbound21:20:265
3391647993634,2cyclictest3629766-21kworker/u16:0+flush-8:021:16:185
3391647993634,2cyclictest3521774-21kworker/u16:4+flush-8:021:32:415
3391647993533,2cyclictest3820702-21kworker/u16:0+events_unbound23:32:215
3391647993533,2cyclictest3806515-21kworker/u16:1+flush-8:022:22:215
3391647993533,2cyclictest3806515-21kworker/u16:1+events_unbound22:56:415
3391647993533,2cyclictest3650200-21kworker/u16:3+events_unbound21:42:545
3391647993432,2cyclictest4025013-21kworker/u16:1+events_unbound00:06:505
3391647993432,2cyclictest3855841-21kworker/u16:2+events_unbound23:16:495
3391647993432,2cyclictest3820702-21kworker/u16:0+events_unbound23:40:495
3391647993432,2cyclictest3710773-21kworker/u16:0+events_unbound21:53:495
3391647993432,2cyclictest3710773-21kworker/u16:0+events_unbound21:53:495
3391647993432,2cyclictest3521774-21kworker/u16:4+events_unbound22:01:465
3391647993432,2cyclictest3344322-21kworker/u16:4+flush-8:019:33:545
3391647993431,2cyclictest3820702-21kworker/u16:0+flush-8:022:28:505
3391647993331,2cyclictest4025013-21kworker/u16:1+events_unbound00:15:175
3391647993331,2cyclictest3855841-21kworker/u16:2+events_unbound23:02:295
3391647993331,2cyclictest3855841-21kworker/u16:2+events_unbound00:01:185
3391647993331,2cyclictest3820702-21kworker/u16:0+flush-8:022:39:455
3391647993331,2cyclictest3820702-21kworker/u16:0+events_unbound23:09:455
3391647993331,2cyclictest3806515-21kworker/u16:1+events_unbound23:04:185
3391647993331,2cyclictest3650200-21kworker/u16:3+events_unbound22:24:465
3391647993331,2cyclictest3646893-21kworker/u16:2+events_unbound21:34:175
3391647993331,2cyclictest3521774-21kworker/u16:4+events_unbound21:27:185
3391647993230,2cyclictest3928451-21kworker/u16:4+events_unbound23:45:135
3391647993230,2cyclictest3928451-21kworker/u16:4+events_unbound23:25:135
3391647993230,2cyclictest3855842-21kworker/u16:4+events_unbound22:45:385
3391647993230,2cyclictest3855841-21kworker/u16:2+flush-8:000:31:175
3391647993230,2cyclictest3710773-21kworker/u16:0+events_unbound22:15:255
3391647993230,2cyclictest3521774-21kworker/u16:4+events_unbound22:09:415
3391647993129,2cyclictest3928451-21kworker/u16:4+events_unbound23:55:265
3391647993129,2cyclictest3650200-21kworker/u16:3+events_unbound21:44:225
3391647993129,2cyclictest3521774-21kworker/u16:4+events_unbound20:57:095
3391647993129,2cyclictest3401246-21kworker/u16:2+events_unbound19:32:105
3391649993028,2cyclictest3127692-21kworker/u16:1+flush-8:019:33:266
3391649993026,3cyclictest3855841-21kworker/u16:2+flush-8:022:48:056
3391649993026,3cyclictest3710773-21kworker/u16:0+flush-8:022:03:006
3391647993028,2cyclictest4097643-21kworker/u16:0+events_unbound00:25:015
3391647993028,2cyclictest3928451-21kworker/u16:4+events_unbound23:21:185
3391647993028,2cyclictest3855841-21kworker/u16:2+events_unbound00:37:495
3391647993028,2cyclictest3471180-21kworker/u16:3+events_unbound20:06:555
339165499290,27cyclictest1234-21snmpd20:33:157
3391647992927,2cyclictest4061442-21kworker/u16:3+events_unbound00:20:295
3391647992927,2cyclictest3453179-21kworker/u16:0+flush-8:019:55:355
3391654992824,3cyclictest124-21kswapd000:12:597
3391647992826,2cyclictest3471180-21kworker/u16:3+events_unbound20:00:545
3391643992826,2cyclictest4025013-21kworker/u16:1+events_unbound00:13:154
3391654992722,4cyclictest3637918-21latency_hist21:13:007
3391647992725,2cyclictest3521774-21kworker/u16:4+events_unbound21:04:545
3391647992725,2cyclictest3127692-21kworker/u16:1+events_unbound19:27:545
3391647992724,2cyclictest3481816-21kworker/u16:2+events_unbound20:23:105
41334472260,1chrt4133445-21ssh00:37:157
3391649992624,2cyclictest3453179-21kworker/u16:0+flush-8:019:53:156
3391647992624,2cyclictest3401246-21kworker/u16:2+events_unbound19:19:105
3391654992524,0cyclictest0-21swapper/722:53:207
339165499250,23cyclictest827-21dbus-daemon19:23:017
3391647992523,2cyclictest3521774-21kworker/u16:4+flush-8:020:33:235
339109222515,7sleep60-21swapper/619:04:356
3391654992423,0cyclictest0-21swapper/723:08:217
3391654992422,1cyclictest0-21swapper/721:53:177
3391654992422,1cyclictest0-21swapper/721:53:177
3391654992418,5cyclictest3452950-21latency_hist19:38:007
3391643992421,2cyclictest3481816-21kworker/u16:2+flush-8:020:28:254
3391643992421,2cyclictest3481816-21kworker/u16:2+flush-8:020:28:254
3391654992318,3cyclictest3860500-21kthreadcore22:43:227
339165499230,21cyclictest3854594-21taskset22:40:577
3391647992321,2cyclictest3521774-21kworker/u16:4+flush-8:020:22:535
3391654992217,4cyclictest3819466-21latency_hist22:27:597
3391654992217,4cyclictest3686382-21latency_hist21:33:007
339165499221,20cyclictest857-21udisksd22:17:387
3391649992220,2cyclictest3928451-21kworker/u16:4+flush-8:023:18:256
3391649992220,2cyclictest3855841-21kworker/u16:2+flush-8:000:03:306
3391649992220,2cyclictest3521774-21kworker/u16:4+flush-8:021:58:006
3391649992220,2cyclictest3521774-21kworker/u16:4+flush-8:021:58:006
3391647992220,2cyclictest3453179-21kworker/u16:0+events_unbound20:12:535
3391654992119,1cyclictest3781032-21ssh22:09:027
3391654992119,1cyclictest0-21swapper/721:03:167
3391654992118,2cyclictest3832861-21iostat22:33:167
3391654992118,2cyclictest3832861-21iostat22:33:167
3391654992115,5cyclictest635-21systemd-journal20:03:007
3391647992119,2cyclictest3471180-21kworker/u16:3+flush-8:020:39:575
339165499200,18cyclictest3513799-21cut20:08:177
3391647992018,2cyclictest3481816-21kworker/u16:2+flush-8:020:32:575
3391647992018,2cyclictest3481816-21kworker/u16:2+flush-8:020:32:575
3391654991916,2cyclictest0-21swapper/720:53:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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