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2026-08-25 - 03:32
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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 376 highest latencies:
System rackdslot3.osadl.org (updated Tue Aug 25, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491212164,36phc2sys0-21swapper/319:07:143
91932205171,23sleep20-21swapper/219:08:272
91052205172,22sleep10-21swapper/119:07:181
90012201168,22sleep00-21swapper/019:06:050
9606996912,9cyclictest26221-21apt-get00:25:002
139391680,1ptp4l401ktimersoftd/320:15:013
960699668,16cyclictest22458-21/usr/sbin/munin21:50:152
139391620,1ptp4l401ktimersoftd/322:20:243
931226050,3sleep30-21swapper/319:10:023
131772590,3sleep0111rcuc/019:15:220
960699587,12cyclictest0-21swapper/200:14:562
960699587,11cyclictest8346-21latency_hist22:30:002
9605995833,3cyclictest25-21ksoftirqd/121:45:301
960699579,17cyclictest13932-21cpuspeed_turbos23:55:092
960699579,11cyclictest11337-21awk23:40:242
960699577,12cyclictest15838-21sed21:35:212
960699567,15cyclictest27871-21/usr/sbin/munin20:55:112
960699566,12cyclictest21414-21latency_hist19:35:012
139391560,1ptp4l401ktimersoftd/321:18:173
110182560,5sleep1231rcuc/121:25:171
960699547,16cyclictest23863-21/usr/sbin/munin23:00:232
960699547,11cyclictest27858-21cat19:45:262
960699536,13cyclictest26221-21apt-get00:25:032
960699528,14cyclictest26793-21ssh20:50:262
9605995218,4cyclictest25-21ksoftirqd/123:44:291
960699506,14cyclictest32330-21apt-get23:20:032
960699505,8cyclictest845-21ls00:35:262
9607994943,3cyclictest22429-21latency_hist20:45:003
57898480,2rtkit-daemon0-21swapper/119:48:121
960699476,7cyclictest29925-21apt-config23:15:012
9606994717,28cyclictest1325-21kworker/2:220:15:232
960699456,8cyclictest13048-21iostat_ios21:30:192
960699456,16cyclictest3674-21apt-get20:05:132
960699448,8cyclictest15924-21diskstats20:30:162
960699446,7cyclictest17794-21meminfo19:25:252
9604994439,3cyclictest22558-21cron23:00:000
960699436,15cyclictest9685-21munin-node21:20:112
960599438,9cyclictest25-21ksoftirqd/122:25:001
960599438,7cyclictest25-21ksoftirqd/100:00:201
960599436,5cyclictest25-21ksoftirqd/100:40:001
960699427,15cyclictest13458-21df20:25:152
960699426,7cyclictest31430-21diskstats19:55:172
960699426,17cyclictest2363-21apt-get21:10:012
960699426,16cyclictest31413-21/usr/sbin/munin22:10:152
960599425,8cyclictest25-21ksoftirqd/123:00:241
9605994211,8cyclictest25-21ksoftirqd/119:15:251
960499427,7cyclictest9-21ksoftirqd/021:35:260
139391420,0ptp4l401ktimersoftd/319:20:013
134491420,1getstats0-21swapper/323:45:003
134491420,1getstats0-21swapper/322:30:013
9607994135,4cyclictest28809-21cron22:05:003
960699416,7cyclictest5854-21iostat_ios23:30:182
960599419,10cyclictest25-21ksoftirqd/120:45:011
960599415,8cyclictest25-21ksoftirqd/119:20:241
9605994136,3cyclictest25-21ksoftirqd/121:00:001
960599412,8cyclictest25-21ksoftirqd/122:05:231
9605994125,5cyclictest25-21ksoftirqd/100:10:001
960599410,5cyclictest25-21ksoftirqd/120:20:261
134491410,1getstats0-21swapper/323:05:003
960699408,7cyclictest2900-21sshd20:01:092
960699406,7cyclictest18184-21meminfo21:40:232
960599408,7cyclictest25-21ksoftirqd/122:30:261
960599405,3cyclictest121rcu_preempt22:25:271
960599404,3cyclictest121rcu_preempt19:35:221
960599404,10cyclictest25-21ksoftirqd/119:55:191
9605994036,2cyclictest25-21ksoftirqd/120:20:011
9605994035,3cyclictest25-21ksoftirqd/100:30:001
9605994034,3cyclictest25-21ksoftirqd/121:10:261
960599403,3cyclictest121rcu_preempt19:40:251
9605994011,4cyclictest25-21ksoftirqd/100:15:011
960599400,7cyclictest121rcu_preempt00:30:281
139391400,0ptp4l401ktimersoftd/321:55:273
9606993934,3cyclictest21902-21fschecks_count19:35:152
960699391,35cyclictest15723-21wc22:45:122
960599398,9cyclictest25-21ksoftirqd/120:45:241
960599398,8cyclictest25-21ksoftirqd/123:10:241
960599397,8cyclictest25-21ksoftirqd/123:05:191
960599397,8cyclictest25-21ksoftirqd/121:20:141
960599397,8cyclictest25-21ksoftirqd/100:21:411
960599397,4cyclictest25-21ksoftirqd/120:05:241
960599395,2cyclictest121rcu_preempt21:05:191
960599394,4cyclictest25-21ksoftirqd/122:50:231
960599394,3cyclictest121rcu_preempt22:10:171
960599394,2cyclictest121rcu_preempt21:40:251
960599393,8cyclictest25-21ksoftirqd/123:25:191
9605993910,4cyclictest25-21ksoftirqd/120:30:151
9604993934,3cyclictest9-21ksoftirqd/023:15:010
9604993912,5cyclictest9-21ksoftirqd/019:35:010
134491390,1getstats0-21swapper/300:20:013
9606993830,7cyclictest33-21ksoftirqd/221:17:102
960599389,7cyclictest25-21ksoftirqd/120:50:191
960599388,5cyclictest25-21ksoftirqd/123:50:191
960599387,3cyclictest25-21ksoftirqd/121:30:211
960599384,3cyclictest121rcu_preempt22:00:181
960599384,3cyclictest121rcu_preempt19:50:201
960599384,3cyclictest121rcu_preempt19:50:201
960599384,2cyclictest121rcu_preempt23:55:091
960599383,3cyclictest121rcu_preempt23:30:231
9605993833,3cyclictest25-21ksoftirqd/123:25:001
9605993833,3cyclictest25-21ksoftirqd/122:00:011
9605993833,2cyclictest25-21ksoftirqd/123:00:001
960599383,2cyclictest121rcu_preempt20:35:191
960599383,2cyclictest121rcu_preempt20:25:261
9605993832,3cyclictest25-21ksoftirqd/122:20:011
9604993834,2cyclictest9-21ksoftirqd/023:10:000
960599377,8cyclictest25-21ksoftirqd/123:15:251
960599376,9cyclictest25-21ksoftirqd/119:10:181
960599375,8cyclictest25-21ksoftirqd/121:15:151
960599375,3cyclictest121rcu_preempt20:10:141
960599373,3cyclictest25-21ksoftirqd/119:25:181
9605993732,3cyclictest25-21ksoftirqd/121:35:121
9605993731,3cyclictest25-21ksoftirqd/121:50:201
9605993731,3cyclictest25-21ksoftirqd/120:00:131
960599372,3cyclictest121rcu_preempt23:35:301
960599372,3cyclictest121rcu_preempt23:35:301
960599371,3cyclictest121rcu_preempt19:35:001
9604993732,3cyclictest9-21ksoftirqd/022:20:000
9604993732,3cyclictest9-21ksoftirqd/021:30:000
9604993732,3cyclictest9-21ksoftirqd/021:10:000
9604993732,3cyclictest9-21ksoftirqd/000:20:010
9604993732,3cyclictest14472-21kworker/0:022:45:240
9607993630,4cyclictest41-21ksoftirqd/300:34:513
960699366,8cyclictest18720-21iostat22:50:172
9606993632,3cyclictest33-21ksoftirqd/223:05:162
9605993632,3cyclictest25-21ksoftirqd/122:35:121
9605993631,3cyclictest25-21ksoftirqd/121:00:151
960599362,2cyclictest121rcu_preempt22:45:191
9604993632,2cyclictest9-21ksoftirqd/019:45:200
9604993631,3cyclictest9-21ksoftirqd/022:40:140
9604993631,2cyclictest9-21ksoftirqd/022:10:000
9604993613,4cyclictest9-21ksoftirqd/000:30:280
57898360,4rtkit-daemon13475-21grep22:40:131
57898360,2rtkit-daemon0-21swapper/000:25:070
9607993529,4cyclictest41-21ksoftirqd/321:37:233
9607993529,4cyclictest41-21ksoftirqd/321:05:013
9607993529,4cyclictest41-21ksoftirqd/320:03:553
9607993529,4cyclictest41-21ksoftirqd/319:37:333
9607993529,4cyclictest41-21ksoftirqd/319:27:133
9607993528,4cyclictest41-21ksoftirqd/320:45:133
960699359,10cyclictest1300-21snmpd19:15:142
9606993530,3cyclictest33-21ksoftirqd/200:35:002
9606993529,4cyclictest33-21ksoftirqd/223:45:072
9606993529,4cyclictest33-21ksoftirqd/200:08:502
9605993531,3cyclictest25-21ksoftirqd/100:20:011
9604993531,3cyclictest9-21ksoftirqd/023:05:000
9604993530,3cyclictest9-21ksoftirqd/023:59:050
9604993530,3cyclictest9-21ksoftirqd/022:50:170
9604993530,3cyclictest9-21ksoftirqd/022:25:000
9604993530,3cyclictest9-21ksoftirqd/021:40:200
9604993530,3cyclictest9-21ksoftirqd/020:15:280
9604993530,3cyclictest9-21ksoftirqd/020:05:140
9604993530,3cyclictest9-21ksoftirqd/019:55:200
9604993530,3cyclictest9-21ksoftirqd/019:35:140
9604993529,4cyclictest9-21ksoftirqd/023:49:380
9604993529,4cyclictest9-21ksoftirqd/023:44:410
9604993529,4cyclictest9-21ksoftirqd/020:33:290
9604993529,4cyclictest9-21ksoftirqd/019:51:540
9604993529,4cyclictest9-21ksoftirqd/019:51:530
9604993529,3cyclictest9-21ksoftirqd/021:55:190
57898350,2rtkit-daemon0-21swapper/023:18:220
9607993429,3cyclictest41-21ksoftirqd/323:57:503
9607993429,3cyclictest41-21ksoftirqd/300:03:213
9607993428,4cyclictest41-21ksoftirqd/321:45:003
9607993428,4cyclictest41-21ksoftirqd/321:33:133
960699347,10cyclictest0-21swapper/219:20:192
960699346,16cyclictest22086-21ls22:55:272
960699346,14cyclictest23964-21ls20:45:222
9606993428,4cyclictest33-21ksoftirqd/219:11:552
9604993429,3cyclictest9-21ksoftirqd/021:00:190
9604993429,3cyclictest9-21ksoftirqd/020:10:190
9604993429,3cyclictest9-21ksoftirqd/000:05:000
9604993428,4cyclictest9-21ksoftirqd/022:37:010
9604993428,4cyclictest9-21ksoftirqd/022:10:130
9604993428,4cyclictest9-21ksoftirqd/021:32:260
9604993428,4cyclictest9-21ksoftirqd/021:21:000
9604993428,4cyclictest9-21ksoftirqd/021:15:490
9604993421,4cyclictest9-21ksoftirqd/023:30:260
9607993328,3cyclictest41-21ksoftirqd/323:47:343
9607993328,3cyclictest41-21ksoftirqd/322:34:093
9607993327,4cyclictest41-21ksoftirqd/320:37:593
9607993327,4cyclictest41-21ksoftirqd/320:17:513
9607993327,4cyclictest41-21ksoftirqd/320:06:413
960799330,2cyclictest121rcu_preempt22:47:223
960699338,11cyclictest0-21swapper/220:20:172
9606993329,2cyclictest33-21ksoftirqd/222:35:092
9606993327,4cyclictest33-21ksoftirqd/223:39:292
9606993327,4cyclictest33-21ksoftirqd/223:39:292
9606993327,4cyclictest33-21ksoftirqd/223:16:432
9606993327,4cyclictest33-21ksoftirqd/222:33:102
9605993328,3cyclictest25-21ksoftirqd/123:50:011
9604993329,3cyclictest9-21ksoftirqd/022:05:000
9604993329,3cyclictest9-21ksoftirqd/000:25:000
9604993328,3cyclictest9-21ksoftirqd/021:15:000
9604993328,3cyclictest9-21ksoftirqd/020:55:130
9604993328,3cyclictest9-21ksoftirqd/000:05:210
9604993327,4cyclictest9-21ksoftirqd/023:35:140
9604993327,4cyclictest9-21ksoftirqd/023:35:140
9604993327,4cyclictest9-21ksoftirqd/022:33:160
9604993327,4cyclictest9-21ksoftirqd/020:45:280
9604993327,3cyclictest9-21ksoftirqd/020:20:130
9604993327,3cyclictest9-21ksoftirqd/019:20:190
9604993319,3cyclictest9-21ksoftirqd/021:54:590
139391330,0ptp4l401ktimersoftd/319:30:253
9607993227,3cyclictest41-21ksoftirqd/300:07:493
9607993226,4cyclictest41-21ksoftirqd/321:12:513
9607993226,4cyclictest41-21ksoftirqd/300:39:323
960699326,10cyclictest1300-21snmpd23:25:512
9606993227,3cyclictest33-21ksoftirqd/222:24:442
9606993226,4cyclictest33-21ksoftirqd/221:00:032
9604993229,2cyclictest9-21ksoftirqd/019:40:140
9604993228,2cyclictest9-21ksoftirqd/020:45:000
9604993228,2cyclictest9-21ksoftirqd/000:35:180
9604993227,3cyclictest9-21ksoftirqd/020:35:090
9604993226,4cyclictest9-21ksoftirqd/020:52:360
9604993225,4cyclictest9-21ksoftirqd/020:27:200
9604993222,3cyclictest9-21ksoftirqd/023:25:260
36892320,4sleep33693-21irqrtprio23:25:183
139391320,9ptp4l401ktimersoftd/319:56:563
9607993126,3cyclictest41-21ksoftirqd/323:31:323
9607993126,3cyclictest41-21ksoftirqd/322:44:443
9607993126,3cyclictest41-21ksoftirqd/322:15:253
9607993126,3cyclictest41-21ksoftirqd/320:57:433
9607993125,4cyclictest41-21ksoftirqd/323:21:013
9607993125,4cyclictest41-21ksoftirqd/323:17:163
9607993125,4cyclictest41-21ksoftirqd/322:35:563
9607993125,4cyclictest41-21ksoftirqd/322:12:373
9607993125,4cyclictest41-21ksoftirqd/319:53:363
9607993125,4cyclictest41-21ksoftirqd/319:53:363
9607993125,4cyclictest41-21ksoftirqd/319:47:403
9607993125,4cyclictest41-21ksoftirqd/300:23:073
9607993124,4cyclictest16509-21cron19:24:593
960699317,10cyclictest24357-21cat21:55:132
9606993127,3cyclictest33-21ksoftirqd/222:19:092
9606993126,3cyclictest33-21ksoftirqd/221:49:492
9606993125,4cyclictest33-21ksoftirqd/223:53:292
9606993125,4cyclictest33-21ksoftirqd/221:29:472
9604993126,3cyclictest9-21ksoftirqd/019:26:320
9604993125,4cyclictest9-21ksoftirqd/019:13:090
9607993025,3cyclictest41-21ksoftirqd/323:53:353
9607993025,3cyclictest41-21ksoftirqd/322:07:523
9607993025,3cyclictest41-21ksoftirqd/321:47:273
9606993024,4cyclictest33-21ksoftirqd/222:05:112
9604993026,3cyclictest9-21ksoftirqd/000:10:200
9604993025,3cyclictest9-21ksoftirqd/023:53:070
139391300,9ptp4l401ktimersoftd/300:28:343
139391300,0ptp4l401ktimersoftd/322:58:053
139391300,0ptp4l401ktimersoftd/321:53:143
960699295,10cyclictest0-21swapper/221:05:122
9606992924,3cyclictest33-21ksoftirqd/220:36:342
9604992924,3cyclictest9-21ksoftirqd/022:25:140
9604992918,3cyclictest9-21ksoftirqd/021:45:310
9604992917,3cyclictest9-21ksoftirqd/020:00:250
9604992916,3cyclictest9-21ksoftirqd/023:20:010
139391290,0ptp4l401ktimersoftd/321:06:243
139391290,0ptp4l401ktimersoftd/320:50:203
9607992823,3cyclictest41-21ksoftirqd/322:50:043
9607992823,3cyclictest41-21ksoftirqd/320:20:533
960699284,10cyclictest0-21swapper/222:40:172
9606992823,3cyclictest33-21ksoftirqd/220:42:382
9606992823,3cyclictest33-21ksoftirqd/200:03:582
9606992822,4cyclictest33-21ksoftirqd/219:50:112
9606992822,4cyclictest33-21ksoftirqd/219:50:112
9606992822,4cyclictest33-21ksoftirqd/200:18:492
139391280,0ptp4l401ktimersoftd/323:35:333
139391280,0ptp4l401ktimersoftd/323:35:333
9607992722,3cyclictest41-21ksoftirqd/320:30:133
139391270,0ptp4l401ktimersoftd/321:26:173
9607992621,3cyclictest41-21ksoftirqd/320:27:063
9607992620,4cyclictest41-21ksoftirqd/323:11:023
9607992620,4cyclictest41-21ksoftirqd/321:20:343
9606992621,3cyclictest33-21ksoftirqd/219:41:482
9606992620,4cyclictest33-21ksoftirqd/222:02:332
139391260,0ptp4l401ktimersoftd/319:40:133
9607992519,4cyclictest41-21ksoftirqd/300:11:363
139391250,0ptp4l401ktimersoftd/323:05:203
9606992420,3cyclictest33-21ksoftirqd/220:10:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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