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2026-06-24 - 00:10
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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 Tue Jun 23, 2026 12:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2929721460,5sleep22520999cyclictest11:55:172
2520899810,69cyclictest31439-21sed12:00:181
3522670,5sleep2344-21awk10:55:002
2520899671,22cyclictest31995-21sed07:25:001
2520899668,18cyclictest2182-21date08:40:001
2520899660,24cyclictest26134-21ls10:40:111
134491660,2ptp4l0-21swapper/207:05:232
2520899650,25cyclictest12473-21missed_timers07:50:211
2520899650,23cyclictest5500-21cstates11:05:121
2520899630,60cyclictest19322-21memory09:15:211
2520899621,29cyclictest2512-21chrt12:07:521
2520899620,24cyclictest10163-21df_abs11:15:131
2520899611,56cyclictest17341-21/usr/sbin/munin11:30:161
2520899610,58cyclictest20940-21df08:10:141
2520899610,58cyclictest20940-21df08:10:141
2520899590,55cyclictest21107-21tune2fs09:20:151
2520899581,53cyclictest12409-21iostat_ios10:10:191
2520899580,31cyclictest5280-21date11:05:001
2520899580,23cyclictest4470-21cat07:35:121
2520899580,20cyclictest4328-21latency_hist08:45:001
134491580,3ptp4l0-21swapper/110:50:221
2520899572,18cyclictest0-21swapper/111:50:001
2520899570,28cyclictest20307-21chrt08:07:541
134491570,4ptp4l0-21swapper/007:38:100
134491570,3ptp4l0-21swapper/208:15:372
134491570,3ptp4l0-21swapper/207:55:132
2520899562,19cyclictest0-21swapper/111:53:521
2520899562,15cyclictest0-21swapper/107:15:161
2520899560,53cyclictest2678-21df_abs09:50:141
2520899560,24cyclictest3878-21latency12:10:181
2520899560,24cyclictest3878-21latency12:10:181
2520899550,26cyclictest29713-21seq08:29:351
134491550,4ptp4l2415-21apt-get09:50:122
134491550,3ptp4l0-21swapper/208:45:122
134491550,3ptp4l0-21swapper/009:17:350
2520899542,22cyclictest0-21swapper/112:19:411
2520899542,21cyclictest0-21swapper/109:56:021
2520899541,31cyclictest29799-21ssh11:55:241
2520899541,20cyclictest14205-21hddtemp_smartct09:05:131
2520899540,27cyclictest18110-21seq09:14:561
2520899540,25cyclictest11419-21chrt10:07:571
2520899540,24cyclictest30144-21taskset09:40:031
25207995426,4cyclictest9-21ksoftirqd/007:50:000
25207995423,3cyclictest9-21ksoftirqd/007:33:150
25207995417,8cyclictest9-21ksoftirqd/010:30:280
134491540,9ptp4l0-21swapper/310:52:293
134491540,4ptp4l22368-21meminfo11:40:192
134491540,4ptp4l0-21swapper/008:06:540
2520899532,21cyclictest0-21swapper/112:39:591
2520899531,21cyclictest16120-21/usr/sbin/munin08:00:221
2520899531,19cyclictest4993-21perl08:45:161
2520899530,25cyclictest15730-21seq07:58:261
25207995322,3cyclictest9-21ksoftirqd/011:27:030
25207995317,5cyclictest9-21ksoftirqd/009:35:000
134491530,4ptp4l0-21swapper/207:35:292
134491530,4ptp4l0-21swapper/011:00:360
134491530,4ptp4l0-21swapper/008:00:030
134491530,4ptp4l0-21swapper/007:24:270
134491530,3ptp4l0-21swapper/209:13:302
134491530,3ptp4l0-21swapper/012:10:280
134491530,3ptp4l0-21swapper/012:10:280
2520899521,18cyclictest1750-21ntp_states10:55:231
2520899520,27cyclictest9588-21seq11:14:191
2520899520,25cyclictest24864-21seq08:16:431
2520899520,23cyclictest13362-21runrttasks09:03:011
25207995221,3cyclictest9-21ksoftirqd/007:40:180
25207995218,8cyclictest9-21ksoftirqd/010:13:060
134491520,4ptp4l0-21swapper/011:05:560
2520899511,24cyclictest27262-21seq07:14:451
2520899510,18cyclictest22678-21ps11:40:231
25207995117,8cyclictest9-21ksoftirqd/012:15:260
25207995116,6cyclictest9-21ksoftirqd/008:30:130
134491510,3ptp4l0-21swapper/008:38:160
134491510,11ptp4l1301-21snmpd09:27:183
2520899501,26cyclictest27830-21taskset09:35:051
2520899500,25cyclictest11802-21seq12:28:481
2520799509,7cyclictest9-21ksoftirqd/011:45:000
25207995021,3cyclictest9-21ksoftirqd/011:55:110
25207995020,4cyclictest9-21ksoftirqd/009:05:020
25207995019,3cyclictest9-21ksoftirqd/011:50:060
25207995018,4cyclictest9-21ksoftirqd/009:55:180
134491500,4ptp4l0-21swapper/208:44:052
134491500,4ptp4l0-21swapper/010:39:540
134491500,4ptp4l0-21swapper/009:13:420
134491500,4ptp4l0-21swapper/008:23:190
134491500,3ptp4l0-21swapper/010:29:180
134491500,3ptp4l0-21swapper/010:02:450
2520899492,45cyclictest0-21swapper/108:55:131
25208994911,26cyclictest14251-21seq12:33:021
2520899490,26cyclictest15845-21seq10:15:501
2520899490,24cyclictest31816-21chrt08:32:091
2520899490,22cyclictest26453-21cut08:20:211
25207994921,7cyclictest9-21ksoftirqd/010:45:290
25207994919,4cyclictest9-21ksoftirqd/011:30:130
25207994918,3cyclictest9-21ksoftirqd/012:21:430
25207994917,4cyclictest9-21ksoftirqd/009:40:270
25207994915,4cyclictest9-21ksoftirqd/012:00:180
134491490,4ptp4l0-21swapper/107:09:151
134491490,4ptp4l0-21swapper/009:27:140
134491490,4ptp4l0-21swapper/008:46:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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