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2026-07-21 - 13:30
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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 Tue Jul 21, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2811321230,7sleep12456199cyclictest23:55:171
24560996428,7cyclictest9-21ksoftirqd/022:40:250
59062620,4sleep20-21swapper/219:40:002
59062620,4sleep20-21swapper/219:40:002
134491610,3ptp4l29468-21/usr/sbin/munin22:50:262
24560996029,6cyclictest9-21ksoftirqd/021:10:230
24560995932,7cyclictest9-21ksoftirqd/023:45:230
24560995931,9cyclictest9-21ksoftirqd/021:00:150
24560995928,7cyclictest9-21ksoftirqd/020:55:270
24560995927,3cyclictest9-21ksoftirqd/000:00:170
24560995924,11cyclictest9-21ksoftirqd/023:20:150
24560995923,7cyclictest9-21ksoftirqd/023:55:180
24560995920,8cyclictest9-21ksoftirqd/020:00:160
154962590,3sleep1231rcuc/100:35:241
134491590,5ptp4l0-21swapper/222:28:442
24560995826,4cyclictest9-21ksoftirqd/023:15:140
24560995820,3cyclictest9-21ksoftirqd/023:35:000
134491580,4ptp4l0-21swapper/121:31:491
134491580,4ptp4l0-21swapper/019:40:440
134491580,4ptp4l0-21swapper/019:32:500
24560995725,6cyclictest9-21ksoftirqd/000:15:140
24560995710,2cyclictest9-21ksoftirqd/000:05:190
134491570,3ptp4l0-21swapper/120:05:281
24560995626,4cyclictest9-21ksoftirqd/022:20:250
134491560,5ptp4l0-21swapper/321:12:113
134491560,4ptp4l0-21swapper/120:56:271
134491560,3ptp4l0-21swapper/300:25:303
134491560,3ptp4l0-21swapper/200:05:402
24560995524,7cyclictest9-21ksoftirqd/000:35:150
134491550,3ptp4l0-21swapper/321:46:143
134491550,3ptp4l0-21swapper/221:35:302
28972540,3sleep30-21swapper/321:50:273
2456099544,7cyclictest9-21ksoftirqd/022:40:000
2456099544,4cyclictest31415-21awk20:35:000
2456099543,6cyclictest9-21ksoftirqd/020:40:160
24560995424,7cyclictest9-21ksoftirqd/022:25:190
134491540,5ptp4l0-21swapper/219:09:562
134491540,4ptp4l0-21swapper/322:37:473
134491540,4ptp4l0-21swapper/019:22:540
134491540,3ptp4l0-21swapper/119:50:191
2456199535,3cyclictest134491ptp4l20:40:231
24561995329,21cyclictest25-21ksoftirqd/120:50:111
2456099538,4cyclictest8639-21df_abs19:45:150
2456099538,3cyclictest9-21ksoftirqd/020:15:170
24560995324,6cyclictest9-21ksoftirqd/019:10:230
24560995323,3cyclictest9-21ksoftirqd/000:10:200
134491530,4ptp4l0-21swapper/320:21:163
134491530,4ptp4l0-21swapper/023:31:210
134491530,3ptp4l0-21swapper/020:23:490
24560995214,5cyclictest9-21ksoftirqd/022:30:000
134491520,4ptp4l0-21swapper/300:14:043
134491520,4ptp4l0-21swapper/220:32:512
2456199514,45cyclictest3599-21kworker/1:223:33:091
2456099515,4cyclictest9-21ksoftirqd/023:00:150
2456099514,6cyclictest9-21ksoftirqd/022:45:280
24560995140,3cyclictest9-21ksoftirqd/021:39:590
2456099513,7cyclictest9-21ksoftirqd/020:40:000
2456099513,4cyclictest9-21ksoftirqd/021:40:250
2456099513,3cyclictest0-21swapper/019:55:160
134491510,9ptp4l22793-21/usr/sbin/munin19:05:181
134491510,3ptp4l0-21swapper/222:49:382
134491510,3ptp4l0-21swapper/020:08:120
24563995021,4cyclictest41-21ksoftirqd/323:20:203
2456299501,3cyclictest6775-21iostat20:50:192
2456099505,3cyclictest9-21ksoftirqd/020:30:000
2456099502,6cyclictest25541-21irqrtprio21:30:190
2456099502,2cyclictest29036-21latency_hist19:20:010
2456099501,6cyclictest9-21ksoftirqd/019:50:290
134491500,3ptp4l311rcuc/223:40:222
134491500,3ptp4l0-21swapper/323:53:563
134491500,3ptp4l0-21swapper/200:04:092
134491500,13ptp4l24362-21sort19:10:003
134491500,10ptp4l21770-21apt-get19:05:020
2456099494,5cyclictest9-21ksoftirqd/022:50:210
2456099493,6cyclictest9-21ksoftirqd/000:25:140
2456099493,3cyclictest0-21swapper/021:55:290
2456099492,3cyclictest0-21swapper/000:20:290
24560994917,5cyclictest9-21ksoftirqd/021:29:590
24560994915,4cyclictest9-21ksoftirqd/023:00:000
134491490,4ptp4l0-21swapper/121:10:511
24563994826,9cyclictest41-21ksoftirqd/320:15:193
2456099483,5cyclictest9-21ksoftirqd/020:50:260
24560994821,5cyclictest9-21ksoftirqd/023:25:160
2456099481,6cyclictest9-21ksoftirqd/023:40:260
134491480,3ptp4l0-21swapper/322:17:573
134491480,3ptp4l0-21swapper/223:37:462
134491480,14ptp4l33-21ksoftirqd/220:01:492
24563994721,7cyclictest41-21ksoftirqd/319:50:193
24563994718,4cyclictest41-21ksoftirqd/300:18:113
24563994715,4cyclictest41-21ksoftirqd/322:09:193
24563994715,4cyclictest41-21ksoftirqd/300:21:413
2456099475,2cyclictest0-21swapper/023:10:190
2456099474,5cyclictest9-21ksoftirqd/022:04:590
2456099474,4cyclictest13784-21irqrtprio21:05:190
2456099473,5cyclictest9-21ksoftirqd/021:45:130
2456099473,3cyclictest121rcu_preempt20:10:210
2456099473,2cyclictest0-21swapper/022:15:150
2456099472,9cyclictest0-21swapper/021:50:170
2456099472,5cyclictest9-21ksoftirqd/019:25:290
2456099472,2cyclictest0-21swapper/000:30:160
134491470,8ptp4l0-21swapper/222:40:162
134491470,4ptp4l0-21swapper/123:18:571
134491470,4ptp4l0-21swapper/019:37:080
134491470,4ptp4l0-21swapper/019:37:080
134491470,3ptp4l321ktimersoftd/222:10:222
24563994617,6cyclictest41-21ksoftirqd/320:35:143
24563994615,8cyclictest41-21ksoftirqd/319:45:273
24563994614,3cyclictest41-21ksoftirqd/321:34:413
24563994613,7cyclictest41-21ksoftirqd/320:47:473
24561994629,14cyclictest25-21ksoftirqd/100:01:021
2456099466,2cyclictest11104-21df_inode22:10:160
2456099464,3cyclictest9-21ksoftirqd/022:05:130
2456099463,3cyclictest9-21ksoftirqd/021:20:190
2456099463,2cyclictest0-21swapper/023:05:150
2456099463,2cyclictest0-21swapper/023:05:150
2456099462,7cyclictest0-21swapper/021:20:000
2456099460,8cyclictest9-21ksoftirqd/020:45:120
134491460,4ptp4l0-21swapper/200:36:232
134491460,4ptp4l0-21swapper/121:26:001
2456399455,3cyclictest41-21ksoftirqd/323:05:193
2456399455,3cyclictest41-21ksoftirqd/323:05:193
24563994534,9cyclictest41-21ksoftirqd/321:40:013
24563994530,4cyclictest41-21ksoftirqd/319:36:463
24563994530,4cyclictest41-21ksoftirqd/319:36:463
24563994515,8cyclictest41-21ksoftirqd/320:25:143
24563994515,7cyclictest41-21ksoftirqd/321:06:173
24563994515,7cyclictest41-21ksoftirqd/300:30:153
24563994514,4cyclictest41-21ksoftirqd/323:10:383
2456099453,3cyclictest9-21ksoftirqd/023:50:140
134491450,9ptp4l31853-21df20:35:162
134491450,9ptp4l0-21swapper/222:37:522
134491450,4ptp4l0-21swapper/322:58:563
134491450,3ptp4l0-21swapper/121:09:031
2456399443,2cyclictest121rcu_preempt23:37:413
24563994415,7cyclictest41-21ksoftirqd/322:20:143
24563994413,4cyclictest41-21ksoftirqd/323:03:433
24563994410,7cyclictest41-21ksoftirqd/321:17:553
134491440,9ptp4l0-21swapper/222:55:122
134491440,9ptp4l0-21swapper/221:05:082
134491440,9ptp4l0-21swapper/220:07:222
134491440,4ptp4l4056-21apt-get23:05:151
134491440,4ptp4l4056-21apt-get23:05:151
134491440,4ptp4l0-21swapper/123:29:211
134491440,10ptp4l0-21swapper/322:34:553
24563994338,3cyclictest41-21ksoftirqd/321:30:003
24563994337,3cyclictest41-21ksoftirqd/321:25:013
24563994314,6cyclictest41-21ksoftirqd/323:45:173
134491430,9ptp4l0-21swapper/220:24:422
134491430,5ptp4l30329-21irqstats22:50:201
134491430,4ptp4l6206-21apt-get22:00:131
134491430,4ptp4l0-21swapper/323:56:303
134491430,4ptp4l0-21swapper/222:15:312
134491430,3ptp4l0-21swapper/223:34:002
134491430,3ptp4l0-21swapper/100:18:491
24563994238,2cyclictest41-21ksoftirqd/323:20:013
24563994237,3cyclictest41-21ksoftirqd/321:00:003
24563994237,3cyclictest41-21ksoftirqd/319:29:593
24563994236,3cyclictest41-21ksoftirqd/322:13:593
24563994213,8cyclictest41-21ksoftirqd/320:50:183
24563994213,7cyclictest41-21ksoftirqd/322:50:013
24563994213,4cyclictest41-21ksoftirqd/323:25:373
134491420,9ptp4l0-21swapper/223:04:582
134491420,9ptp4l0-21swapper/221:32:312
134491420,9ptp4l0-21swapper/221:23:212
134491420,8ptp4l0-21swapper/221:29:452
134491420,8ptp4l0-21swapper/219:26:402
134491420,8ptp4l0-21swapper/219:12:272
134491420,6ptp4l0-21swapper/122:15:291
134491420,5ptp4l0-21swapper/300:35:123
134491420,4ptp4l2735-21apt-get00:10:132
134491420,4ptp4l19761-21apt-get22:30:031
134491420,4ptp4l15415-21apt-get22:20:131
134491420,4ptp4l15270-21apt-get20:00:111
24563994136,3cyclictest41-21ksoftirqd/323:40:273
24563994136,3cyclictest41-21ksoftirqd/320:45:003
24563994114,6cyclictest41-21ksoftirqd/320:10:133
24563994113,7cyclictest41-21ksoftirqd/300:00:243
24563994112,7cyclictest41-21ksoftirqd/322:50:153
24563994110,7cyclictest41-21ksoftirqd/319:40:253
24563994110,4cyclictest41-21ksoftirqd/300:05:193
24561994134,4cyclictest25-21ksoftirqd/119:59:591
134491410,9ptp4l0-21swapper/200:31:262
134491410,8ptp4l0-21swapper/219:53:442
134491410,5ptp4l0-21swapper/319:10:123
134491410,5ptp4l0-21swapper/121:50:251
134491410,5ptp4l0-21swapper/121:20:311
134491410,4ptp4l30462-21ntp_states21:40:251
134491410,4ptp4l17713-21apt-get21:15:131
134491410,4ptp4l15987-21iostat_ios22:20:182
134491410,4ptp4l0-21swapper/220:45:192
134491410,4ptp4l0-21swapper/200:20:222
134491410,3ptp4l20218-21apt-get22:30:122
134491410,3ptp4l11175-21apt-get23:20:131
134491410,3ptp4l0-21swapper/221:51:292
2456399408,4cyclictest41-21ksoftirqd/322:25:273
2456399405,6cyclictest121rcu_preempt19:15:243
2456399404,2cyclictest121rcu_preempt20:03:573
2456399403,4cyclictest41-21ksoftirqd/321:00:233
24563994034,3cyclictest41-21ksoftirqd/322:40:293
24563994034,3cyclictest41-21ksoftirqd/321:41:593
2456199402,5cyclictest0-21swapper/120:32:351
134491400,5ptp4l0-21swapper/321:55:263
134491400,5ptp4l0-21swapper/122:35:151
134491400,5ptp4l0-21swapper/121:55:161
134491400,4ptp4l20708-21irqstats20:10:181
134491400,4ptp4l11072-21ls00:25:262
134491400,4ptp4l0-21swapper/322:00:233
134491400,4ptp4l0-21swapper/221:43:352
134491400,4ptp4l0-21swapper/220:59:592
134491400,4ptp4l0-21swapper/219:19:352
134491400,4ptp4l0-21swapper/200:16:302
134491400,4ptp4l0-21swapper/121:45:231
134491400,4ptp4l0-21swapper/121:35:231
134491400,3ptp4l22939-21apt-get23:45:132
134491400,3ptp4l19290-21ls23:35:221
134491400,3ptp4l1555-21apt-get20:40:122
134491400,3ptp4l0-21swapper/120:25:221
24563993934,3cyclictest41-21ksoftirqd/323:30:273
24563993933,3cyclictest41-21ksoftirqd/319:30:223
2456399392,3cyclictest121rcu_preempt20:05:193
2456399392,2cyclictest121rcu_preempt20:30:153
24561993933,4cyclictest25-21ksoftirqd/100:08:141
2456199390,4cyclictest27539-21/usr/sbin/munin22:45:171
134491390,4ptp4l32766-21sed22:55:241
134491390,4ptp4l32456-21meminfo19:25:221
134491390,4ptp4l32212-21iostat20:35:191
134491390,4ptp4l0-21swapper/223:50:362
134491390,4ptp4l0-21swapper/223:15:242
134491390,4ptp4l0-21swapper/223:05:342
134491390,4ptp4l0-21swapper/223:05:342
134491390,4ptp4l0-21swapper/222:05:422
134491390,4ptp4l0-21swapper/221:58:482
134491390,4ptp4l0-21swapper/221:47:492
134491390,4ptp4l0-21swapper/221:10:452
134491390,4ptp4l0-21swapper/220:15:442
134491390,4ptp4l0-21swapper/220:12:142
134491390,4ptp4l0-21swapper/219:45:372
134491390,4ptp4l0-21swapper/219:40:292
134491390,4ptp4l0-21swapper/219:22:312
134491390,4ptp4l0-21swapper/200:00:002
134491390,4ptp4l0-21swapper/122:25:251
134491390,4ptp4l0-21swapper/122:10:201
134491390,4ptp4l0-21swapper/120:46:261
134491390,4ptp4l0-21swapper/120:22:351
134491390,4ptp4l0-21swapper/120:15:261
134491390,4ptp4l0-21swapper/119:45:131
134491390,4ptp4l0-21swapper/119:40:121
134491390,4ptp4l0-21swapper/100:10:561
134491390,3ptp4l27839-21meminfo19:15:211
134491390,3ptp4l0-21swapper/222:03:482
134491390,3ptp4l0-21swapper/221:16:282
134491390,3ptp4l0-21swapper/221:01:452
134491390,3ptp4l0-21swapper/219:31:112
134491390,3ptp4l0-21swapper/123:00:221
134491390,3ptp4l0-21swapper/122:05:231
134491390,3ptp4l0-21swapper/121:00:191
24563993834,2cyclictest41-21ksoftirqd/319:20:273
24563993820,10cyclictest41-21ksoftirqd/319:55:123
2456199380,3cyclictest23248-21diskstats23:45:171
134491380,5ptp4l26255-21cat22:40:271
134491380,4ptp4l0-21swapper/223:25:142
134491380,4ptp4l0-21swapper/223:22:212
134491380,4ptp4l0-21swapper/223:10:282
134491380,4ptp4l0-21swapper/220:26:192
134491380,4ptp4l0-21swapper/119:30:121
134491380,4ptp4l0-21swapper/119:11:191
134491380,3ptp4l0-21swapper/219:58:112
134491380,3ptp4l0-21swapper/119:35:141
134491380,3ptp4l0-21swapper/119:35:141
24561993731,4cyclictest25-21ksoftirqd/123:53:401
134491370,4ptp4l0-21swapper/123:12:371
134491370,4ptp4l0-21swapper/100:25:191
134491370,3ptp4l0-21swapper/123:40:141
24561993630,4cyclictest25-21ksoftirqd/100:24:091
134491360,3ptp4l0-21swapper/119:20:251
134491360,3ptp4l0-21swapper/100:30:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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