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2025-12-19 - 11:32
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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 highest latencies:
System rackdslot1.osadl.org (updated Fri Dec 19, 2025 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
79262870,3sleep07929-21processes19:10:230
667999801,77cyclictest0-21swapper/223:40:282
667999781,75cyclictest0-21swapper/220:40:282
134491730,32ptp4l25-21ksoftirqd/121:35:171
667999715,24cyclictest13498-21irqrtprio00:00:212
6679997110,18cyclictest18444-21df_abs19:35:142
667999690,29cyclictest11219-21date19:19:582
667999682,24cyclictest0-21swapper/220:25:162
134491670,4ptp4l9058-21/usr/sbin/munin22:40:281
667999661,26cyclictest19196-21taskset23:00:562
667999660,27cyclictest29281-21chrt19:57:402
667999660,26cyclictest24144-21chrt00:23:222
667999660,25cyclictest32387-21chrt21:14:412
667999660,25cyclictest28090-21cat21:05:132
667999660,20cyclictest134491ptp4l20:55:152
667999651,26cyclictest4911-21chrt21:25:002
667999651,21cyclictest15211-21timerandwakeup20:35:282
667999640,26cyclictest9192-21chrt21:33:482
667999640,24cyclictest24290-21timerandwakeup19:45:262
667999630,28cyclictest20332-21cat21:55:262
667999630,28cyclictest20332-21cat21:55:262
667999630,27cyclictest12288-21chrt23:56:452
667999630,26cyclictest7667-21chrt23:46:272
667999630,26cyclictest4679-21chrt22:32:572
667999630,26cyclictest4641-21chrt21:24:242
667999630,26cyclictest30985-21chrt23:28:452
667999620,29cyclictest2111-21taskset21:17:222
667999620,27cyclictest9350-21chrt22:40:552
667999620,27cyclictest25307-21chrt22:06:052
667999612,24cyclictest0-21swapper/223:15:522
667999610,38cyclictest8832-21cat19:14:582
667999610,27cyclictest22539-21chrt20:52:402
667999610,26cyclictest27283-21chrt21:01:412
667999610,25cyclictest3091-21chrt23:36:592
667999610,25cyclictest22356-21chrt19:42:152
667999600,27cyclictest19493-21taskset00:13:012
667999600,26cyclictest28695-21taskset23:24:322
667999600,26cyclictest2511-21chrt22:29:402
667999600,26cyclictest21865-21taskset00:18:512
667999600,26cyclictest1643-21chrt20:08:512
667999600,26cyclictest14554-21taskset22:53:112
667999600,25cyclictest31658-21taskset20:02:452
667999592,32cyclictest0-21swapper/220:15:132
667999591,29cyclictest15900-21taskset19:30:072
667999591,19cyclictest25645-21ntp_states00:25:242
667999590,26cyclictest27598-21chrt22:11:022
667999590,26cyclictest11450-21chrt21:38:172
667999590,25cyclictest11994-21chrt22:47:372
134491580,4ptp4l0-21swapper/100:15:261
667999570,26cyclictest28565-21taskset00:31:162
134491570,4ptp4l23094-21chrt22:02:111
134491570,3ptp4l0-21swapper/123:04:021
667999560,24cyclictest7298-21taskset22:39:152
134491560,4ptp4l0-21swapper/020:01:400
134491560,3ptp4l0-21swapper/120:32:241
134491560,3ptp4l0-21swapper/119:45:201
667999550,52cyclictest11477-21apt-get20:30:122
134491550,4ptp4l0-21swapper/119:59:141
134491550,3ptp4l0-21swapper/119:15:171
667999540,27cyclictest12081-21grep21:40:142
134491540,4ptp4l20152-21fschecks_time23:05:163
134491540,4ptp4l0-21swapper/320:44:313
134491540,4ptp4l0-21swapper/023:24:260
134491540,4ptp4l0-21swapper/000:10:040
134491530,4ptp4l0-21swapper/121:15:511
134491530,3ptp4l0-21swapper/121:00:271
134491530,3ptp4l0-21swapper/119:41:251
134491530,2ptp4l6706-21latency_hist20:19:590
667999520,49cyclictest18945-21interrupts20:45:172
134491520,6ptp4l0-21swapper/319:05:473
134491520,4ptp4l0-21swapper/123:34:241
134491520,4ptp4l0-21swapper/120:23:481
134491520,4ptp4l0-21swapper/120:12:451
134491520,4ptp4l0-21swapper/020:26:340
134491520,3ptp4l0-21swapper/123:40:181
134491520,3ptp4l0-21swapper/120:51:091
134491520,3ptp4l0-21swapper/019:44:050
134491510,4ptp4l0-21swapper/323:16:483
134491510,3ptp4l0-21swapper/119:21:071
134491500,5ptp4l0-21swapper/219:05:322
134491500,4ptp4l0-21swapper/319:38:513
134491500,4ptp4l0-21swapper/122:32:421
134491500,3ptp4l0-21swapper/320:55:053
134491500,3ptp4l0-21swapper/122:53:241
134491500,3ptp4l0-21swapper/022:05:140
134491500,12ptp4l0-21swapper/122:12:431
134491490,5ptp4l0-21swapper/019:08:330
134491490,4ptp4l0-21swapper/323:49:163
134491490,4ptp4l0-21swapper/121:25:381
134491490,4ptp4l0-21swapper/120:02:001
134491480,4ptp4l0-21swapper/322:45:323
134491480,4ptp4l0-21swapper/319:18:393
134491480,4ptp4l0-21swapper/300:38:243
134491480,4ptp4l0-21swapper/023:44:260
134491480,3ptp4l0-21swapper/119:52:121
134491470,4ptp4l0-21swapper/122:29:111
134491470,3ptp4l0-21swapper/319:33:463
134491470,3ptp4l0-21swapper/019:20:400
6680994614,4cyclictest41-21ksoftirqd/300:10:013
134491460,4ptp4l0-21swapper/123:11:281
134491460,4ptp4l0-21swapper/119:11:041
134491460,4ptp4l0-21swapper/020:53:450
6680994540,3cyclictest41-21ksoftirqd/320:29:593
134491450,4ptp4l0-21swapper/019:48:060
134491450,3ptp4l19324-21ls20:45:193
134491450,3ptp4l0-21swapper/120:48:221
668099449,7cyclictest41-21ksoftirqd/323:59:423
6680994439,3cyclictest41-21ksoftirqd/320:14:583
668099442,2cyclictest121rcu_preempt23:40:453
667999442,22cyclictest0-21swapper/200:09:392
134491440,5ptp4l24140-21memory20:55:210
134491440,4ptp4l0-21swapper/122:36:501
134491440,3ptp4l0-21swapper/122:09:361
134491440,3ptp4l0-21swapper/023:55:200
134491440,3ptp4l0-21swapper/021:33:150
668099439,4cyclictest41-21ksoftirqd/323:30:183
6680994313,3cyclictest41-21ksoftirqd/319:55:243
6680994311,7cyclictest41-21ksoftirqd/322:55:003
667999432,21cyclictest0-21swapper/200:37:272
667999430,26cyclictest21498-21taskset23:05:582
134491430,9ptp4l0-21swapper/220:14:402
134491430,9ptp4l0-21swapper/022:56:000
134491430,8ptp4l0-21swapper/023:28:590
134491430,7ptp4l4524-21grep19:05:141
134491430,5ptp4l32159-21/usr/sbin/munin22:20:280
134491430,5ptp4l0-21swapper/222:55:132
134491430,4ptp4l1387-21memory22:25:210
134491430,4ptp4l0-21swapper/123:35:171
134491430,4ptp4l0-21swapper/019:19:580
134491430,3ptp4l8208-21apt-get23:50:120
134491430,3ptp4l15163-21apt-get22:55:143
134491430,3ptp4l0-21swapper/123:55:151
668099425,7cyclictest41-21ksoftirqd/319:49:583
6680994238,3cyclictest41-21ksoftirqd/321:14:593
6680994211,4cyclictest41-21ksoftirqd/323:20:303
134491420,9ptp4l0-21swapper/223:11:062
134491420,9ptp4l0-21swapper/219:29:342
134491420,9ptp4l0-21swapper/021:18:060
134491420,9ptp4l0-21swapper/020:37:370
134491420,7ptp4l0-21swapper/000:26:390
134491420,5ptp4l28371-21meminfo19:55:210
134491420,5ptp4l25322-21memory23:15:221
134491420,5ptp4l18061-21ps23:00:190
134491420,5ptp4l0-21swapper/122:45:281
134491420,5ptp4l0-21swapper/022:35:020
134491420,4ptp4l25693-21iostat19:50:190
134491420,4ptp4l13746-21users21:40:301
134491420,4ptp4l0-21swapper/321:41:023
134491420,4ptp4l0-21swapper/100:35:231
134491420,4ptp4l0-21swapper/023:45:140
134491420,3ptp4l26443-21ls21:00:190
134491420,3ptp4l24369-21apt-get23:15:120
668099419,8cyclictest41-21ksoftirqd/320:30:203
668099416,3cyclictest41-21ksoftirqd/319:25:253
6680994137,2cyclictest41-21ksoftirqd/300:25:003
6680994128,10cyclictest41-21ksoftirqd/300:25:253
668099411,5cyclictest121rcu_preempt22:40:253
668099411,12cyclictest41-21ksoftirqd/320:39:353
6680994110,4cyclictest41-21ksoftirqd/321:10:003
134491410,9ptp4l0-21swapper/221:49:002
134491410,6ptp4l0-21swapper/100:25:141
134491410,5ptp4l0-21swapper/122:20:131
134491410,4ptp4l9489-21diskstats20:25:131
134491410,4ptp4l2953-21diskstats21:20:150
134491410,4ptp4l28322-21df_inode21:05:150
134491410,4ptp4l27552-21apt-get21:05:021
134491410,4ptp4l21448-21users23:05:300
134491410,4ptp4l15332-21df00:05:180
134491410,4ptp4l14796-21hddtemp_smartct21:45:171
134491410,4ptp4l0-21swapper/321:28:163
134491410,4ptp4l0-21swapper/319:54:183
134491410,4ptp4l0-21swapper/221:54:342
134491410,4ptp4l0-21swapper/219:23:352
134491410,4ptp4l0-21swapper/122:19:461
134491410,4ptp4l0-21swapper/023:10:200
134491410,4ptp4l0-21swapper/021:53:190
134491410,3ptp4l28986-21apt-get23:25:121
134491410,3ptp4l28170-21apt-get22:15:123
134491410,3ptp4l13626-21apt-get19:25:131
134491410,3ptp4l11906-21hddtemp_smartct20:30:180
668099408,4cyclictest41-21ksoftirqd/322:20:193
668099408,3cyclictest41-21ksoftirqd/320:00:123
6680994035,3cyclictest41-21ksoftirqd/322:35:003
6680994035,3cyclictest41-21ksoftirqd/300:15:003
668099402,2cyclictest121rcu_preempt22:26:463
668099400,11cyclictest41-21ksoftirqd/321:33:483
134491400,5ptp4l2452-21phc2sys23:35:263
134491400,4ptp4l3759-21ntp_states21:20:233
134491400,4ptp4l20081-21tr00:15:140
134491400,4ptp4l16395-21df_inode20:40:151
134491400,4ptp4l0-21swapper/322:39:403
134491400,4ptp4l0-21swapper/321:39:563
134491400,4ptp4l0-21swapper/300:30:583
134491400,4ptp4l0-21swapper/222:21:282
134491400,4ptp4l0-21swapper/222:02:182
134491400,4ptp4l0-21swapper/220:22:142
134491400,4ptp4l0-21swapper/122:55:181
134491400,4ptp4l0-21swapper/121:30:131
134491400,4ptp4l0-21swapper/121:14:591
134491400,4ptp4l0-21swapper/119:30:171
134491400,4ptp4l0-21swapper/023:35:220
134491400,4ptp4l0-21swapper/022:54:490
134491400,4ptp4l0-21swapper/022:30:200
134491400,4ptp4l0-21swapper/022:17:100
134491400,4ptp4l0-21swapper/022:10:240
134491400,4ptp4l0-21swapper/022:01:460
134491400,4ptp4l0-21swapper/021:39:570
134491400,4ptp4l0-21swapper/021:10:140
134491400,4ptp4l0-21swapper/020:40:050
134491400,4ptp4l0-21swapper/000:20:100
134491400,4ptp4l0-21swapper/000:03:050
134491400,3ptp4l9682-21apt-get22:45:020
134491400,3ptp4l7386-21/usr/sbin/munin20:20:190
134491400,3ptp4l32286-21meminfo23:30:202
134491400,3ptp4l32204-21/usr/sbin/munin20:05:130
134491400,3ptp4l22531-21df_inode00:20:151
134491400,3ptp4l19532-21iostat_ios21:55:181
134491400,3ptp4l19532-21iostat_ios21:55:181
134491400,3ptp4l18812-21hddtemp_smartct20:45:160
134491400,3ptp4l17827-21df00:10:161
134491400,3ptp4l14370-21apt-get21:45:133
134491400,3ptp4l1171-21ls20:05:261
134491400,3ptp4l0-21swapper/123:54:241
134491400,11ptp4l0-21swapper/120:16:501
668099399,3cyclictest41-21ksoftirqd/300:15:193
668099394,6cyclictest41-21ksoftirqd/322:10:003
6680993935,2cyclictest41-21ksoftirqd/300:00:163
6680993934,3cyclictest41-21ksoftirqd/322:14:593
6680993934,3cyclictest41-21ksoftirqd/321:55:273
6680993934,3cyclictest41-21ksoftirqd/321:55:273
6680993927,10cyclictest41-21ksoftirqd/320:15:243
134491390,5ptp4l0-21swapper/219:50:152
134491390,4ptp4l22290-21unixbench_multi20:50:313
134491390,4ptp4l0-21swapper/323:28:043
134491390,4ptp4l0-21swapper/322:04:383
134491390,4ptp4l0-21swapper/319:40:413
134491390,4ptp4l0-21swapper/223:51:322
134491390,4ptp4l0-21swapper/222:17:142
134491390,4ptp4l0-21swapper/123:45:151
134491390,4ptp4l0-21swapper/120:55:131
134491390,4ptp4l0-21swapper/120:35:171
134491390,4ptp4l0-21swapper/100:30:161
134491390,4ptp4l0-21swapper/100:00:041
134491390,4ptp4l0-21swapper/023:30:260
134491390,4ptp4l0-21swapper/021:45:200
134491390,4ptp4l0-21swapper/021:40:440
134491390,4ptp4l0-21swapper/019:37:120
134491390,4ptp4l0-21swapper/000:35:290
134491390,4ptp4l0-21swapper/000:34:100
134491390,3ptp4l22074-21apt-get23:10:143
134491390,3ptp4l19165-21meminfo19:35:201
134491390,3ptp4l0-21swapper/021:57:120
134491390,3ptp4l0-21swapper/021:57:120
134491390,3ptp4l0-21swapper/021:26:170
134491390,3ptp4l0-21swapper/019:30:460
134491390,2ptp4l21199-21ls23:05:281
6680993834,2cyclictest41-21ksoftirqd/320:05:173
6680993833,3cyclictest41-21ksoftirqd/321:15:063
6680993833,3cyclictest41-21ksoftirqd/319:10:143
6680993827,2cyclictest41-21ksoftirqd/321:50:283
134491380,4ptp4l15539-21fschecks_time00:05:201
134491380,4ptp4l0-21swapper/323:50:263
134491380,4ptp4l0-21swapper/123:23:581
134491380,4ptp4l0-21swapper/121:50:401
134491380,4ptp4l0-21swapper/121:20:071
134491380,4ptp4l0-21swapper/022:40:200
134491380,4ptp4l0-21swapper/019:25:120
134491380,3ptp4l25591-21ls21:00:133
668099376,8cyclictest41-21ksoftirqd/319:25:003
134491370,4ptp4l0-21swapper/323:01:183
134491370,4ptp4l0-21swapper/020:10:010
134491370,3ptp4l0-21swapper/320:20:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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