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2026-06-06 - 13:09
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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
Characteristics of the 100 highest latencies:
System rackdslot1.osadl.org (updated Sat Jun 06, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1364721570,5sleep2500599cyclictest20:35:242
193721360,4sleep2500599cyclictest20:10:242
500499740,70cyclictest1114-21/usr/sbin/munin20:10:151
500499730,41cyclictest3140-21chrt23:42:281
500499730,2cyclictest4700-21ntpq23:45:211
500499700,30cyclictest31262-21date22:25:001
27792660,6sleep20-21swapper/219:05:132
500499652,27cyclictest0-21swapper/123:15:141
64242640,4sleep30-21swapper/323:50:183
500499640,24cyclictest23689-21latency_hist19:50:001
5003996431,5cyclictest9-21ksoftirqd/023:35:000
500499631,27cyclictest10756-21df22:50:131
500499631,21cyclictest2318-21gnome-shell21:50:251
5003996328,5cyclictest9-21ksoftirqd/019:15:000
281422630,4sleep00-21swapper/021:05:260
500499620,25cyclictest28904-21apt-get21:10:111
500499610,29cyclictest24539-21taskset00:28:121
500499610,28cyclictest7601-21seq23:50:461
5003996125,4cyclictest9-21ksoftirqd/000:28:580
500599608,7cyclictest0-21swapper/221:00:162
500499600,30cyclictest12262-21taskset21:42:431
134491600,5ptp4l15561-21iostat_ios21:50:170
500499591,29cyclictest28435-21seq23:25:511
500499591,29cyclictest16934-21seq20:44:561
500499591,29cyclictest16934-21seq20:44:561
500499590,30cyclictest22203-21taskset00:22:411
500499590,29cyclictest18636-21taskset19:37:111
134491590,4ptp4l0-21swapper/023:21:140
500599586,7cyclictest0-21swapper/219:15:232
500599586,7cyclictest0-21swapper/219:15:232
500499581,43cyclictest2318-21gnome-shell19:19:591
500499581,43cyclictest2318-21gnome-shell19:19:581
500499580,29cyclictest32709-21seq20:07:451
500499580,29cyclictest21631-21seq23:12:071
500499580,28cyclictest17194-21taskset23:04:071
500499580,28cyclictest14331-21seq20:36:581
500499580,23cyclictest137891phc2sys00:00:261
134491580,3ptp4l0-21swapper/122:25:241
134491580,3ptp4l0-21swapper/023:41:210
134491580,12ptp4l0-21swapper/321:45:133
500599575,7cyclictest0-21swapper/223:00:202
500499571,28cyclictest29215-21seq00:39:131
500499571,22cyclictest8665-21meminfo20:25:201
500499570,30cyclictest5481-21seq22:37:241
500499570,29cyclictest3223-21taskset21:24:571
500499570,29cyclictest28270-21seq19:59:591
500499570,29cyclictest25838-21seq19:53:131
500499570,29cyclictest16209-21seq19:31:111
5003995725,4cyclictest9-21ksoftirqd/021:03:140
134491570,4ptp4l0-21swapper/022:20:040
500499561,29cyclictest23671-21taskset22:05:511
500499561,27cyclictest19647-21seq00:17:221
500499560,30cyclictest26441-21seq23:24:391
500499560,29cyclictest26688-21seq00:31:191
5003995626,6cyclictest9-21ksoftirqd/020:50:270
5003995623,4cyclictest9-21ksoftirqd/023:51:260
5003995623,4cyclictest9-21ksoftirqd/021:42:280
5003995618,6cyclictest9-21ksoftirqd/019:40:190
134491560,4ptp4l0-21swapper/120:31:511
134491560,3ptp4l0-21swapper/223:40:242
134491560,3ptp4l0-21swapper/019:25:280
500599556,11cyclictest0-21swapper/220:20:132
500499553,28cyclictest15002-21seq00:06:471
500499550,29cyclictest4839-21seq20:16:111
500499550,29cyclictest19223-21seq23:05:461
500499550,28cyclictest23507-21taskset20:55:541
5003995525,4cyclictest9-21ksoftirqd/023:18:400
5003995524,5cyclictest9-21ksoftirqd/019:49:590
5003995524,3cyclictest9-21ksoftirqd/021:19:180
5003995522,6cyclictest9-21ksoftirqd/000:20:170
5003995522,3cyclictest9-21ksoftirqd/021:00:010
5003995519,6cyclictest9-21ksoftirqd/020:10:010
5003995519,4cyclictest9-21ksoftirqd/022:10:000
500599545,6cyclictest0-21swapper/221:25:132
500499540,30cyclictest26002-21seq21:00:321
500499540,28cyclictest28661-21taskset22:18:061
5003995425,5cyclictest9-21ksoftirqd/021:30:280
5003995424,6cyclictest9-21ksoftirqd/019:50:190
5003995424,5cyclictest9-21ksoftirqd/019:30:190
5003995424,4cyclictest9-21ksoftirqd/021:37:320
5003995424,4cyclictest9-21ksoftirqd/000:35:270
5003995423,4cyclictest9-21ksoftirqd/023:29:400
5003995422,4cyclictest9-21ksoftirqd/019:20:130
5003995421,6cyclictest9-21ksoftirqd/022:00:250
5003995421,6cyclictest9-21ksoftirqd/020:00:000
5003995419,6cyclictest9-21ksoftirqd/023:55:150
500599535,11cyclictest0-21swapper/219:36:452
500499530,3cyclictest134491ptp4l19:10:291
500499530,27cyclictest14131-21taskset19:29:011
5003995325,3cyclictest9-21ksoftirqd/023:06:210
5003995324,5cyclictest9-21ksoftirqd/022:40:280
5003995324,4cyclictest9-21ksoftirqd/023:04:000
5003995323,4cyclictest9-21ksoftirqd/000:05:230
5003995321,6cyclictest9-21ksoftirqd/022:50:140
5003995320,6cyclictest9-21ksoftirqd/019:15:180
5003995320,6cyclictest9-21ksoftirqd/019:15:180
5003995320,5cyclictest9-21ksoftirqd/022:55:180
5003995319,10cyclictest9-21ksoftirqd/000:20:010
134491530,4ptp4l0-21swapper/300:33:303
134491530,4ptp4l0-21swapper/019:36:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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