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2026-08-17 - 14:07
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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 all highest latencies:
System rackdslot4.osadl.org (updated Mon Aug 17, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591212150,50phc2sys0-21swapper/319:09:443
289132204172,21sleep10-21swapper/119:09:051
289142202170,21sleep20-21swapper/219:09:052
286942201166,23sleep00-21swapper/019:06:140
2172821460,2sleep10-21swapper/122:10:121
1234221380,3sleep12927999cyclictest21:50:191
2928199701,11cyclictest15789-21apache200:07:093
239682690,4sleep10-21swapper/100:25:121
2928099654,23cyclictest12043-21fschecks_count22:55:172
2928099651,29cyclictest26048-21users21:10:292
2928099651,29cyclictest26048-21users21:10:282
2928099651,24cyclictest19182-21cut00:15:132
2928099641,24cyclictest8911-21cron21:45:012
2928099641,24cyclictest8911-21cron21:45:002
2928099640,30cyclictest15482-21mailstats23:00:262
2928099630,27cyclictest2942-21cut20:25:202
2928099621,23cyclictest17132-21expr20:55:152
2928099620,24cyclictest19108-21sort22:05:132
2928099610,23cyclictest11061-21awk19:35:252
2928099600,26cyclictest6011-21vmstat22:40:272
2928099600,25cyclictest10644-21cut20:40:212
2928099590,26cyclictest5817-21grep21:35:272
2928099590,25cyclictest15890-21awk20:50:252
2928099590,24cyclictest1025-21awk21:25:302
2928099590,22cyclictest6153-21latency_hist23:50:002
2928099580,24cyclictest1515-21latency_hist20:25:012
2928199560,15cyclictest1319-21snmpd19:35:253
2928099564,23cyclictest5377-21kernelversion19:25:212
2928099562,23cyclictest27505-21sed20:10:192
106442560,2sleep00-21swapper/021:45:240
2928099550,23cyclictest27501-21grep23:25:252
2928099550,22cyclictest18283-21awk23:05:242
2928099541,23cyclictest19596-21if_enp4s023:10:192
2928099540,23cyclictest13419-21sensors20:45:252
2928099540,22cyclictest29537-21sed21:20:142
146122540,2sleep10-21swapper/120:50:141
2928099531,23cyclictest28051-21ptp4l21:15:232
2928099530,25cyclictest10474-21grep22:50:242
2928099530,24cyclictest7983-21sed20:35:202
2928099530,24cyclictest21580-21cat23:15:152
2928099521,23cyclictest1319-21snmpd21:59:402
2928099520,23cyclictest2499-21sed23:40:212
2928099520,22cyclictest1319-21snmpd21:34:442
130302510,2sleep013031-21grep00:00:280
2928199507,7cyclictest31615-21latency_hist19:14:593
2928199500,16cyclictest2361-21ps22:35:193
2928199500,16cyclictest1656-21cat19:19:593
2928099503,20cyclictest991-21cat19:15:262
2928099501,21cyclictest24887-21hddtemp_smartct20:05:162
2928099500,25cyclictest20579-21awk21:00:242
2928099500,24cyclictest25195-21processes23:20:222
2928099490,22cyclictest32539-21phc2sys-jitter23:35:242
2928199481,12cyclictest30669-21tail00:35:273
2928099481,22cyclictest12038-21expr19:40:132
2927899481,9cyclictest21188-21sshd21:00:530
2928099470,25cyclictest28195-21grep22:20:262
2928099470,22cyclictest29760-21cut00:35:202
2928099470,22cyclictest17666-21cut19:50:192
29279994733,3cyclictest25-21ksoftirqd/122:15:161
29278994712,4cyclictest9-21ksoftirqd/023:20:250
135191470,7getstats2928199cyclictest22:18:213
2928199460,14cyclictest12075-21df_inode21:50:163
2928099461,21cyclictest17577-21latency22:00:202
2928099460,22cyclictest29158-21df_abs23:30:162
2928199450,15cyclictest5363-21sed20:30:193
2928099451,24cyclictest1319-21snmpd19:35:002
2928099450,23cyclictest16490-21cpuspeed_turbos00:10:142
2928099450,22cyclictest2225-21df19:20:162
2928099450,21cyclictest7320-21cut23:50:202
2927999455,7cyclictest25-21ksoftirqd/123:00:001
29278994510,5cyclictest9-21ksoftirqd/022:40:190
2928099440,23cyclictest12201-21irqrtprio00:00:202
2927999445,3cyclictest121rcu_preempt19:24:591
29279994413,3cyclictest25-21ksoftirqd/123:50:171
2927899440,7cyclictest9-21ksoftirqd/022:15:000
138491440,0ptp4l401ktimersoftd/323:06:323
2928199430,13cyclictest24795-21perl21:10:173
2928199430,13cyclictest24795-21perl21:10:173
2928099430,22cyclictest25213-21latency22:15:212
2927899435,3cyclictest121rcu_preempt19:45:310
29278994333,3cyclictest9-21ksoftirqd/023:20:000
135191430,2getstats0-21swapper/322:08:213
2928099423,28cyclictest30274-21latency20:15:192
2928099420,23cyclictest23384-21cat22:10:272
2928099420,22cyclictest22534-21cut20:00:212
2928099420,22cyclictest22534-21cut20:00:202
2928099420,20cyclictest15196-21sendmail_mailtr00:05:262
2927999425,3cyclictest25-21ksoftirqd/120:40:191
2927999423,10cyclictest25-21ksoftirqd/100:15:241
29278994237,3cyclictest9-21ksoftirqd/020:40:010
29278994228,3cyclictest9-21ksoftirqd/020:45:130
138491420,1ptp4l401ktimersoftd/300:33:543
138491420,0ptp4l401ktimersoftd/320:25:533
138491420,0ptp4l401ktimersoftd/320:10:013
138491420,0ptp4l401ktimersoftd/319:40:233
138491420,0ptp4l401ktimersoftd/300:19:183
2928199410,16cyclictest5533-21processes22:40:223
2928099410,22cyclictest6701-21cpuspeed22:45:132
2928099410,22cyclictest30947-21timerandwakeup19:10:262
2928099410,21cyclictest12384-21irqrtprio21:50:192
29279994136,3cyclictest25-21ksoftirqd/121:25:171
29279994127,3cyclictest25-21ksoftirqd/120:45:211
29279994126,4cyclictest25-21ksoftirqd/123:30:191
2927899417,3cyclictest9-21ksoftirqd/023:25:280
2927899415,10cyclictest9-21ksoftirqd/000:10:000
2927899413,3cyclictest121rcu_preempt21:20:130
2927899412,2cyclictest121rcu_preempt21:10:130
2927899412,2cyclictest121rcu_preempt21:10:130
29278994113,9cyclictest9-21ksoftirqd/023:00:170
138491410,0ptp4l401ktimersoftd/320:05:043
138491410,0ptp4l401ktimersoftd/319:21:063
2928099400,24cyclictest6215-21sed20:30:282
2928099400,21cyclictest20059-21irqrtprio19:55:202
29279994036,2cyclictest25-21ksoftirqd/100:40:001
29279994026,4cyclictest25-21ksoftirqd/100:00:261
29279994026,3cyclictest25-21ksoftirqd/123:45:241
29279994026,3cyclictest25-21ksoftirqd/121:55:271
29279994026,3cyclictest25-21ksoftirqd/119:35:251
29279994025,6cyclictest25-21ksoftirqd/119:15:161
29279994025,4cyclictest25-21ksoftirqd/123:20:121
29279994025,4cyclictest25-21ksoftirqd/123:15:291
29279994025,4cyclictest25-21ksoftirqd/121:30:261
29279994025,4cyclictest25-21ksoftirqd/121:00:271
29279994025,4cyclictest25-21ksoftirqd/120:15:201
29279994025,3cyclictest25-21ksoftirqd/122:35:151
29279994025,3cyclictest25-21ksoftirqd/100:10:231
29279994024,4cyclictest25-21ksoftirqd/123:35:161
29279994024,3cyclictest25-21ksoftirqd/123:40:121
2927899403,9cyclictest9-21ksoftirqd/020:00:200
2927899403,9cyclictest9-21ksoftirqd/020:00:200
29278994034,3cyclictest9-21ksoftirqd/021:55:000
29278994031,3cyclictest9-21ksoftirqd/000:15:000
2927899402,3cyclictest121rcu_preempt21:15:190
2927899401,8cyclictest121rcu_preempt22:45:200
29278994010,10cyclictest9-21ksoftirqd/020:55:000
138491400,0ptp4l401ktimersoftd/319:27:243
29280993931,5cyclictest33-21ksoftirqd/200:30:012
2928099390,27cyclictest10824-21timerwakeupswit21:45:262
29279993933,3cyclictest25-21ksoftirqd/119:25:141
29279993926,3cyclictest25-21ksoftirqd/119:50:261
29279993925,4cyclictest25-21ksoftirqd/123:00:291
29279993925,4cyclictest25-21ksoftirqd/120:55:161
29279993925,4cyclictest25-21ksoftirqd/120:30:201
29279993925,4cyclictest25-21ksoftirqd/119:40:281
29279993925,3cyclictest25-21ksoftirqd/123:10:291
29279993925,3cyclictest25-21ksoftirqd/122:20:241
29279993925,3cyclictest25-21ksoftirqd/120:10:171
29279993925,3cyclictest25-21ksoftirqd/120:05:011
29279993925,3cyclictest25-21ksoftirqd/120:00:151
29279993925,3cyclictest25-21ksoftirqd/120:00:151
29279993925,3cyclictest25-21ksoftirqd/100:20:261
29279993925,3cyclictest25-21ksoftirqd/100:05:181
29279993924,4cyclictest25-21ksoftirqd/122:50:141
29279993924,4cyclictest25-21ksoftirqd/122:45:251
29279993924,4cyclictest25-21ksoftirqd/119:55:181
29279993924,3cyclictest25-21ksoftirqd/122:00:161
29279993924,3cyclictest25-21ksoftirqd/121:40:241
29279993924,3cyclictest25-21ksoftirqd/121:40:241
29279993924,3cyclictest25-21ksoftirqd/121:35:231
29279993924,3cyclictest25-21ksoftirqd/121:05:181
2927899398,3cyclictest9-21ksoftirqd/019:20:150
2927899396,9cyclictest9-21ksoftirqd/023:40:120
2927899396,4cyclictest9-21ksoftirqd/019:40:000
2927899396,3cyclictest121rcu_preempt00:35:000
2927899395,3cyclictest9-21ksoftirqd/000:20:170
2927899394,3cyclictest121rcu_preempt22:20:190
2927899394,3cyclictest121rcu_preempt21:30:260
29278993934,3cyclictest9-21ksoftirqd/019:20:000
2927899393,3cyclictest121rcu_preempt19:25:260
29278993924,4cyclictest9-21ksoftirqd/022:50:250
29278993924,3cyclictest9-21ksoftirqd/023:50:180
29278993913,9cyclictest9-21ksoftirqd/020:15:270
2927899390,2cyclictest121rcu_preempt19:50:180
138491390,0ptp4l401ktimersoftd/323:10:183
29281993833,3cyclictest41-21ksoftirqd/321:04:593
29279993833,3cyclictest25-21ksoftirqd/122:35:011
29279993825,3cyclictest25-21ksoftirqd/122:40:271
29279993825,3cyclictest25-21ksoftirqd/119:30:211
29279993824,5cyclictest25-21ksoftirqd/123:55:151
29279993824,3cyclictest25-21ksoftirqd/123:05:091
29279993824,3cyclictest25-21ksoftirqd/122:05:141
29279993824,3cyclictest25-21ksoftirqd/121:45:171
29279993824,3cyclictest25-21ksoftirqd/120:25:241
29279993824,3cyclictest25-21ksoftirqd/100:30:211
29279993823,4cyclictest25-21ksoftirqd/123:25:271
29279993823,3cyclictest25-21ksoftirqd/122:25:181
2927899388,3cyclictest9-21ksoftirqd/021:35:150
2927899384,8cyclictest9-21ksoftirqd/020:20:140
29278993834,2cyclictest9-21ksoftirqd/000:30:010
29278993833,3cyclictest9-21ksoftirqd/020:05:190
29278993829,3cyclictest9-21ksoftirqd/023:40:000
29278993824,3cyclictest9-21ksoftirqd/019:55:170
2927899381,3cyclictest121rcu_preempt20:25:200
2928199375,6cyclictest17153-21cat22:00:173
29281993730,4cyclictest41-21ksoftirqd/322:20:543
2928199370,5cyclictest0-21swapper/322:59:513
2928099370,22cyclictest21752-21/usr/sbin/munin21:05:192
29278993733,2cyclictest9-21ksoftirqd/021:25:150
29278993732,3cyclictest9-21ksoftirqd/023:00:000
29278993731,3cyclictest9-21ksoftirqd/021:10:000
29278993731,3cyclictest9-21ksoftirqd/020:10:130
29278993731,3cyclictest9-21ksoftirqd/000:40:000
29278993725,3cyclictest9-21ksoftirqd/023:10:150
29278993722,4cyclictest9-21ksoftirqd/019:40:190
2927899371,3cyclictest121rcu_preempt22:35:160
2927899370,3cyclictest121rcu_preempt22:15:170
2927899370,3cyclictest121rcu_preempt21:55:230
29281993630,4cyclictest41-21ksoftirqd/321:35:123
29281993630,3cyclictest41-21ksoftirqd/320:15:113
2928099360,21cyclictest3322-21cat22:35:262
2928099360,1cyclictest0-21swapper/222:26:442
2928099360,17cyclictest0-21swapper/222:30:202
29279993630,4cyclictest25-21ksoftirqd/121:18:011
29279993611,7cyclictest25-21ksoftirqd/120:35:191
2927899367,3cyclictest9-21ksoftirqd/020:40:140
2927899366,4cyclictest9-21ksoftirqd/022:00:160
2927899364,8cyclictest9-21ksoftirqd/022:30:150
2927899364,7cyclictest9-21ksoftirqd/023:45:120
29278993633,2cyclictest9-21ksoftirqd/022:25:150
29278993632,2cyclictest9-21ksoftirqd/020:30:150
29278993632,2cyclictest9-21ksoftirqd/019:30:130
29278993631,3cyclictest9-21ksoftirqd/023:55:200
29278993631,3cyclictest9-21ksoftirqd/019:10:130
29278993630,3cyclictest9-21ksoftirqd/020:55:010
29278993621,3cyclictest9-21ksoftirqd/000:15:130
2927899360,5cyclictest9-21ksoftirqd/022:05:130
29281993524,9cyclictest41-21ksoftirqd/300:26:103
2927999355,2cyclictest25-21ksoftirqd/121:10:201
2927999355,2cyclictest25-21ksoftirqd/121:10:201
29279993530,3cyclictest25-21ksoftirqd/121:20:131
29279993530,3cyclictest25-21ksoftirqd/120:20:271
2927899353,3cyclictest121rcu_preempt23:30:290
29278993530,3cyclictest9-21ksoftirqd/021:45:010
29278993530,3cyclictest9-21ksoftirqd/021:45:010
29281993429,3cyclictest41-21ksoftirqd/322:53:443
29281993428,4cyclictest41-21ksoftirqd/321:44:513
29281993428,4cyclictest41-21ksoftirqd/321:44:513
29281993428,4cyclictest41-21ksoftirqd/320:45:553
29281993428,4cyclictest41-21ksoftirqd/319:52:583
29281993428,4cyclictest41-21ksoftirqd/300:04:043
2928099340,17cyclictest0-21swapper/219:45:182
2927999342,10cyclictest25-21ksoftirqd/119:50:001
29278993429,3cyclictest9-21ksoftirqd/023:05:110
29281993328,3cyclictest41-21ksoftirqd/323:04:283
29281993327,4cyclictest41-21ksoftirqd/323:21:433
29281993327,4cyclictest41-21ksoftirqd/321:29:433
29281993327,3cyclictest41-21ksoftirqd/300:10:113
29281993326,4cyclictest41-21ksoftirqd/323:43:223
29280993328,3cyclictest33-21ksoftirqd/200:34:482
29280993327,4cyclictest33-21ksoftirqd/223:55:122
29279993327,4cyclictest25-21ksoftirqd/119:13:131
29281993227,3cyclictest41-21ksoftirqd/321:07:523
29281993226,4cyclictest41-21ksoftirqd/322:32:423
138491320,27ptp4l41-21ksoftirqd/320:35:283
29281993125,4cyclictest41-21ksoftirqd/322:26:393
29281993125,4cyclictest41-21ksoftirqd/320:57:303
29281993124,4cyclictest41-21ksoftirqd/323:39:003
29280993127,3cyclictest33-21ksoftirqd/200:20:382
135191310,1getstats0-21swapper/323:28:213
2928199304,8cyclictest41-21ksoftirqd/322:12:233
29281993025,3cyclictest41-21ksoftirqd/319:59:283
29281992924,3cyclictest41-21ksoftirqd/320:40:333
29281992924,3cyclictest41-21ksoftirqd/300:21:253
29281992923,4cyclictest41-21ksoftirqd/323:45:383
29281992923,4cyclictest41-21ksoftirqd/320:02:093
29281992923,4cyclictest41-21ksoftirqd/320:02:093
2928199286,6cyclictest41-21ksoftirqd/323:30:273
29281992824,2cyclictest41-21ksoftirqd/321:58:083
29281992823,3cyclictest41-21ksoftirqd/323:56:103
29281992822,4cyclictest41-21ksoftirqd/321:18:273
29281992722,3cyclictest41-21ksoftirqd/323:52:393
29281992722,3cyclictest41-21ksoftirqd/321:20:213
29281992722,3cyclictest41-21ksoftirqd/320:24:323
29281992721,4cyclictest41-21ksoftirqd/319:32:533
138491270,0ptp4l401ktimersoftd/323:15:303
29281992520,3cyclictest41-21ksoftirqd/319:48:183
29281992518,4cyclictest41-21ksoftirqd/320:55:013
138491250,0ptp4l401ktimersoftd/322:45:273
138491230,0ptp4l401ktimersoftd/321:30:143
138491220,0ptp4l401ktimersoftd/321:45:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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