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2026-05-09 - 08:02
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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 May 09, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
123221360,6sleep11470799cyclictest23:20:001
14709996611,11cyclictest23910-21taskset21:46:043
14709996610,12cyclictest25862-21chrt19:33:203
134491660,22ptp4l21797-21apt-get20:35:122
298492650,5sleep1448-21dbus-daemon19:40:241
14709996511,11cyclictest21720-21chrt00:00:343
134491650,4ptp4l0-21swapper/223:25:072
14709996411,11cyclictest1249-21chrt00:25:533
14709996410,12cyclictest14959-21taskset21:29:163
14709996410,10cyclictest5777-21taskset22:17:453
134491640,4ptp4l0-21swapper/222:24:072
228482630,4sleep00-21swapper/022:55:160
1470999635,15cyclictest32688-21phc2sys23:15:223
1470699635,15cyclictest0-21swapper/023:20:120
268532600,4sleep10-21swapper/121:55:111
250772600,4sleep30-21swapper/320:40:193
1470699606,7cyclictest624-21apt-get21:00:000
1470699604,15cyclictest29646-21interrupts22:00:170
134491600,4ptp4l0-21swapper/123:35:241
1470999596,17cyclictest22315-21/usr/sbin/munin00:05:233
14709995910,9cyclictest8230-21runrttasks23:34:513
134491580,5ptp4l0-21swapper/223:50:262
134491580,4ptp4l0-21swapper/019:25:250
134491570,3ptp4l0-21swapper/021:15:230
134491570,3ptp4l0-21swapper/020:50:170
134491560,4ptp4l0-21swapper/223:39:552
134491560,4ptp4l0-21swapper/222:34:552
134491560,4ptp4l0-21swapper/200:37:542
134491560,4ptp4l0-21swapper/100:33:141
134491560,3ptp4l0-21swapper/219:30:202
1470699556,5cyclictest13389-21fschecks_time21:25:150
1470699552,11cyclictest18568-21cat19:15:250
134491550,4ptp4l13380-21sed19:05:203
134491550,4ptp4l0-21swapper/121:36:071
134491550,3ptp4l0-21swapper/223:15:252
1470999543,16cyclictest17549-21/usr/sbin/munin21:35:163
1470999543,16cyclictest0-21swapper/300:35:163
1470699547,6cyclictest0-21swapper/019:20:230
1470699545,10cyclictest0-21swapper/020:10:120
134491540,4ptp4l0-21swapper/222:54:282
134491540,4ptp4l0-21swapper/221:01:052
134491540,4ptp4l0-21swapper/121:48:541
134491540,3ptp4l0-21swapper/121:13:141
134491540,3ptp4l0-21swapper/121:13:141
1470999537,9cyclictest20058-21interrupts20:30:173
14709995313,18cyclictest31106-21taskset23:12:463
134491530,3ptp4l0-21swapper/222:25:072
134491530,3ptp4l0-21swapper/119:31:371
1470999524,11cyclictest0-21swapper/320:15:263
1470699522,6cyclictest0-21swapper/023:50:180
1470699522,17cyclictest31747-21sed19:45:200
1470699521,10cyclictest28002-21expr00:15:200
134491520,4ptp4l0-21swapper/122:56:591
1470999519,8cyclictest12039-21taskset20:14:013
1470699513,6cyclictest26852-21cpuspeed21:55:110
134491510,5ptp4l0-21swapper/200:13:002
134491510,5ptp4l0-21swapper/100:22:211
134491510,4ptp4l0-21swapper/223:48:102
134491510,4ptp4l0-21swapper/221:41:122
134491510,3ptp4l0-21swapper/222:40:172
219062500,4sleep125-21ksoftirqd/120:35:121
14709995013,17cyclictest16537-21taskset19:11:563
14709995011,10cyclictest12195-21taskset21:21:113
1470699506,9cyclictest0-21swapper/020:20:170
1470699506,6cyclictest25008-21expr00:10:120
1470699502,4cyclictest0-21swapper/022:05:160
1470699500,17cyclictest15204-21ls19:10:150
134491500,4ptp4l0-21swapper/223:23:342
134491500,4ptp4l0-21swapper/221:46:562
134491500,4ptp4l0-21swapper/220:10:072
134491500,4ptp4l0-21swapper/020:17:020
134491500,3ptp4l0-21swapper/221:15:172
14709994912,11cyclictest1301-21snmpd23:46:063
14709994911,17cyclictest3362-21taskset22:14:013
14709994911,17cyclictest3362-21taskset22:14:013
14709994910,6cyclictest137891phc2sys23:27:183
14709994910,10cyclictest2607-21chrt19:51:533
1470699497,6cyclictest0-21swapper/022:15:170
1470699496,5cyclictest25449-21timerwakeupswit19:30:270
1470699492,9cyclictest19434-21cat20:30:020
134491490,4ptp4l0-21swapper/223:06:162
134491490,4ptp4l0-21swapper/221:08:232
134491490,4ptp4l0-21swapper/220:24:012
134491490,3ptp4l19697-1kworker/2:1H21:53:002
134491490,12ptp4l0-21swapper/219:05:212
134491490,10ptp4l13323-21meminfo19:05:191
1470999486,6cyclictest0-21swapper/319:37:313
14709994811,19cyclictest30464-21taskset20:51:263
1470699486,12cyclictest26747-21cut23:05:000
1470699484,6cyclictest21636-21awk22:50:250
1470699480,10cyclictest30862-21awk23:10:260
1470999477,9cyclictest30519-21ssh22:00:263
1470999477,7cyclictest1082-21appstreamcli21:00:023
1470999476,6cyclictest0-21swapper/319:43:493
1470999476,5cyclictest0-21swapper/322:29:063
1470999476,5cyclictest0-21swapper/300:32:343
14707994712,4cyclictest25-21ksoftirqd/123:05:011
1470699472,5cyclictest0-21swapper/019:55:260
1470699470,11cyclictest16516-21processes21:30:230
134491470,4ptp4l0-21swapper/220:26:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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