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2026-09-20 - 10:58
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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 Sun Sep 20, 2026 00:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
807121350,5sleep0715699cyclictest21:30:210
7157998314,65cyclictest20775-21taskset19:39:511
7157998213,66cyclictest13665-21taskset19:22:381
7157997414,57cyclictest4833-21runrttasks22:31:501
293642700,4sleep00-21swapper/019:55:290
715799638,15cyclictest12556-21wc21:40:171
7157996312,6cyclictest28118-21sed00:30:291
134491630,4ptp4l21017-21sshd21:56:193
7157996110,10cyclictest30475-21df20:00:141
7157995915,40cyclictest20995-21grep20:50:121
134491580,3ptp4l0-21swapper/319:25:323
134491580,3ptp4l0-21swapper/100:25:161
7157995712,14cyclictest7756-21iostat19:10:211
134491570,5ptp4l0-21swapper/320:15:273
134491570,4ptp4l0-21swapper/321:01:203
134491570,4ptp4l0-21swapper/320:25:183
134491570,4ptp4l0-21swapper/300:39:093
134491570,3ptp4l0-21swapper/123:35:121
134491560,4ptp4l0-21swapper/223:01:292
134491560,3ptp4l0-21swapper/320:10:223
134491560,3ptp4l0-21swapper/320:00:243
134491550,4ptp4l0-21swapper/321:19:383
134491550,3ptp4l0-21swapper/320:06:323
134491550,3ptp4l0-21swapper/123:58:541
7157995411,7cyclictest4021-21mailstats21:20:271
134491540,4ptp4l715699cyclictest22:43:300
134491540,4ptp4l0-21swapper/323:51:273
134491540,4ptp4l0-21swapper/220:21:582
134491540,4ptp4l0-21swapper/220:09:082
134491540,4ptp4l0-21swapper/019:21:460
134491540,3ptp4l0-21swapper/322:55:083
134491540,3ptp4l0-21swapper/320:23:213
134491540,14ptp4l0-21swapper/019:50:170
7157995310,7cyclictest28114-21apt-get21:05:121
134491530,4ptp4l0-21swapper/320:41:253
134491530,3ptp4l0-21swapper/323:04:063
715799529,8cyclictest14553-21apt-get22:55:141
715799528,7cyclictest16759-21apt-get21:50:131
715799528,12cyclictest14760-21apt-get00:05:131
715799527,10cyclictest21987-21grep00:20:131
7157995214,7cyclictest31525-21ntp_states21:10:231
134491520,5ptp4l0-21swapper/219:06:442
134491520,4ptp4l0-21swapper/323:59:103
134491520,4ptp4l0-21swapper/300:07:593
134491520,4ptp4l0-21swapper/222:30:532
134491520,3ptp4l0-21swapper/320:31:003
134491520,3ptp4l0-21swapper/219:49:242
715799519,7cyclictest7138-21apt-get20:20:151
7157995115,7cyclictest16607-21df20:40:131
7157995114,7cyclictest20115-21irqstats21:55:191
7157995114,6cyclictest7844-21df23:50:141
7157995114,6cyclictest16877-21hddtemp_smartct19:30:161
7157995113,7cyclictest3608-21iostat_ios23:40:181
7157995113,7cyclictest22530-21meminfo22:00:181
7157995110,7cyclictest24668-21mailstats19:45:271
7157995110,6cyclictest27291-21ntp_states23:20:241
134491510,5ptp4l0-21swapper/119:09:211
134491510,4ptp4l0-21swapper/319:31:523
134491510,4ptp4l0-21swapper/221:08:592
134491510,3ptp4l0-21swapper/321:05:253
134491510,2ptp4l20975-21/usr/sbin/munin20:50:123
7157995014,6cyclictest10808-21irqstats22:45:191
7157995013,7cyclictest8229-21iostat22:40:181
7157995013,7cyclictest28775-21df_inode23:25:151
7157995013,6cyclictest12580-21irqstats20:30:191
7157995012,35cyclictest17815-21sed23:00:201
7157995010,7cyclictest30792-21apt-get22:20:121
134491500,9ptp4l0-21swapper/321:39:403
134491500,4ptp4l0-21swapper/322:04:013
134491500,4ptp4l0-21swapper/300:04:133
715799497,6cyclictest0-21swapper/120:15:161
7157994914,6cyclictest12529-21df_abs22:50:161
7157994914,6cyclictest12529-21df_abs22:50:161
7157994913,6cyclictest5642-21df_inode23:45:161
7157994911,8cyclictest13417-21memory00:00:231
7157994911,7cyclictest10328-21irqstats19:15:201
134491490,4ptp4l0-21swapper/319:50:393
134491490,4ptp4l0-21swapper/300:25:333
134491490,4ptp4l0-21swapper/223:47:132
134491490,3ptp4l0-21swapper/322:30:343
7157994813,6cyclictest23596-21diskstats20:55:151
7157994813,6cyclictest15052-21meminfo19:25:221
7157994812,7cyclictest10276-21irqstats20:25:161
7157994811,13cyclictest24368-21awk23:15:171
7157994810,7cyclictest6295-21memory22:35:211
134491480,7ptp4l5666-21irqstats19:05:190
134491480,4ptp4l0-21swapper/321:49:553
134491480,4ptp4l0-21swapper/122:18:421
134491480,3ptp4l0-21swapper/219:20:162
134491480,3ptp4l0-21swapper/200:13:112
134491480,11ptp4l0-21swapper/319:24:563
7158994737,7cyclictest33-21ksoftirqd/222:00:002
715899470,3cyclictest121rcu_preempt21:27:002
715799479,8cyclictest14461-21hddtemp_smartct20:35:171
715799479,15cyclictest30977-21df23:30:151
134491470,4ptp4l0-21swapper/322:51:093
134491470,4ptp4l0-21swapper/322:51:093
134491470,4ptp4l0-21swapper/023:37:300
7157994612,7cyclictest19651-21memory20:45:211
7157994610,7cyclictest20174-21meminfo23:05:211
134491460,5ptp4l2318-21gnome-shell19:36:580
134491460,3ptp4l0-21swapper/321:25:513
7158994532,9cyclictest33-21ksoftirqd/221:20:242
7157994512,15cyclictest22863-21python23:10:271
7157994511,15cyclictest25914-21diskstats21:00:171
7157994510,13cyclictest1092-21hddtemp_smartct22:25:161
134491450,9ptp4l0-21swapper/220:15:592
134491450,4ptp4l9794-21apt-get21:35:142
134491450,4ptp4l0-21swapper/222:37:002
134491450,3ptp4l0-21swapper/323:40:053
134491450,3ptp4l0-21swapper/321:33:123
7158994438,3cyclictest33-21ksoftirqd/221:45:012
7158994430,11cyclictest33-21ksoftirqd/221:05:012
7157994411,12cyclictest10098-21df_inode21:35:151
134491440,9ptp4l0-21swapper/222:11:072
134491440,9ptp4l0-21swapper/222:08:392
134491440,9ptp4l0-21swapper/021:42:050
134491440,4ptp4l9933-21apt-get23:55:132
134491440,4ptp4l23885-21apt-get22:05:131
134491440,4ptp4l23289-21apt-get20:55:132
134491440,4ptp4l19222-21apt-get23:05:130
134491440,4ptp4l1708-21ls22:25:220
134491440,4ptp4l0-21swapper/323:47:383
134491440,10ptp4l0-21swapper/223:25:592
134491440,10ptp4l0-21swapper/222:49:052
134491440,10ptp4l0-21swapper/219:40:362
7158994338,3cyclictest33-21ksoftirqd/223:20:002
134491430,9ptp4l0-21swapper/222:59:342
134491430,9ptp4l0-21swapper/200:05:102
134491430,9ptp4l0-21swapper/200:02:402
134491430,9ptp4l0-21swapper/023:33:410
134491430,5ptp4l3989-21meminfo22:30:200
134491430,5ptp4l14709-21df_inode21:45:150
134491430,5ptp4l0-21swapper/000:15:220
134491430,4ptp4l5342-21apt-get22:35:130
134491430,4ptp4l5336-21apt-get23:45:130
134491430,4ptp4l0-21swapper/322:06:273
134491430,4ptp4l0-21swapper/023:50:130
134491430,3ptp4l0-21swapper/221:46:422
134491430,10ptp4l0-21swapper/323:35:173
134491430,10ptp4l0-21swapper/219:35:002
715899424,9cyclictest33-21ksoftirqd/221:10:202
715799429,13cyclictest18171-21irqstats00:10:201
134491420,9ptp4l0-21swapper/223:09:172
134491420,9ptp4l0-21swapper/219:50:442
134491420,9ptp4l0-21swapper/200:31:582
134491420,8ptp4l212-21systemd-journal22:20:010
134491420,8ptp4l0-21swapper/222:50:042
134491420,8ptp4l0-21swapper/222:50:042
134491420,5ptp4l9785-21/usr/sbin/munin19:15:152
134491420,5ptp4l0-21swapper/100:35:231
134491420,5ptp4l0-21swapper/020:50:200
134491420,5ptp4l0-21swapper/000:25:210
134491420,4ptp4l29419-21meminfo23:25:200
134491420,4ptp4l28522-21iostat_ios19:55:212
134491420,4ptp4l25910-21df_inode21:00:170
134491420,4ptp4l19475-21df21:55:140
134491420,4ptp4l11082-21ntp_states22:45:240
134491420,4ptp4l0-21swapper/323:19:423
134491420,4ptp4l0-21swapper/322:35:213
134491420,4ptp4l0-21swapper/320:56:143
134491420,3ptp4l2318-21gnome-shell19:28:580
134491420,3ptp4l0-21swapper/319:37:243
134491420,3ptp4l0-21swapper/220:30:402
715899415,9cyclictest33-21ksoftirqd/220:40:012
7158994136,3cyclictest33-21ksoftirqd/223:45:002
134491410,9ptp4l0-21swapper/223:24:032
134491410,5ptp4l4732-21apt-get21:25:030
134491410,5ptp4l0-21swapper/023:00:210
134491410,5ptp4l0-21swapper/022:55:130
134491410,5ptp4l0-21swapper/020:30:190
134491410,5ptp4l0-21swapper/019:45:170
134491410,4ptp4l5114-21df_inode20:15:150
134491410,4ptp4l30264-21apt-get20:00:132
134491410,4ptp4l25553-21users22:05:300
134491410,4ptp4l25523-21users23:15:280
134491410,4ptp4l20742-21ntp_states00:15:251
134491410,4ptp4l18432-21users21:50:292
134491410,4ptp4l1413-21ntp_states21:15:250
134491410,4ptp4l10505-21iostat_ios23:55:190
134491410,4ptp4l0-21swapper/323:34:563
134491410,4ptp4l0-21swapper/323:05:173
134491410,4ptp4l0-21swapper/322:46:053
134491410,4ptp4l0-21swapper/319:48:043
134491410,4ptp4l0-21swapper/300:18:033
134491410,4ptp4l0-21swapper/223:30:422
134491410,4ptp4l0-21swapper/223:10:222
134491410,4ptp4l0-21swapper/222:00:202
134491410,4ptp4l0-21swapper/221:30:152
134491410,4ptp4l0-21swapper/220:25:072
134491410,4ptp4l0-21swapper/022:12:020
134491410,4ptp4l0-21swapper/020:35:130
134491410,4ptp4l0-21swapper/019:31:080
134491410,4ptp4l0-21swapper/019:11:040
134491410,4ptp4l0-21swapper/000:00:220
134491410,3ptp4l21582-21apt-get22:00:100
134491410,3ptp4l12110-21apt-get21:40:123
134491410,3ptp4l0-21swapper/321:11:573
715899409,6cyclictest33-21ksoftirqd/222:20:262
7158994035,3cyclictest33-21ksoftirqd/220:50:012
715899402,9cyclictest33-21ksoftirqd/219:25:202
134491400,5ptp4l0-21swapper/220:41:592
134491400,5ptp4l0-21swapper/121:25:201
134491400,5ptp4l0-21swapper/120:13:261
134491400,5ptp4l0-21swapper/020:40:250
134491400,5ptp4l0-21swapper/019:40:140
134491400,4ptp4l649-21apt-get22:25:113
134491400,4ptp4l4157-21ntp_states23:40:230
134491400,4ptp4l2877-21/usr/sbin/munin21:20:170
134491400,4ptp4l26749-21iostat_ios23:20:193
134491400,4ptp4l23715-21hddtemp_smartct20:55:180
134491400,4ptp4l0-21swapper/323:25:283
134491400,4ptp4l0-21swapper/323:10:253
134491400,4ptp4l0-21swapper/322:40:533
134491400,4ptp4l0-21swapper/321:21:323
134491400,4ptp4l0-21swapper/300:10:273
134491400,4ptp4l0-21swapper/223:39:572
134491400,4ptp4l0-21swapper/222:25:182
134491400,4ptp4l0-21swapper/219:14:232
134491400,4ptp4l0-21swapper/200:27:362
134491400,4ptp4l0-21swapper/200:20:152
134491400,4ptp4l0-21swapper/022:50:160
134491400,4ptp4l0-21swapper/022:50:160
134491400,4ptp4l0-21swapper/021:54:120
134491400,4ptp4l0-21swapper/021:05:160
134491400,4ptp4l0-21swapper/020:48:570
134491400,4ptp4l0-21swapper/020:25:230
134491400,4ptp4l0-21swapper/020:10:530
134491400,4ptp4l0-21swapper/000:37:030
134491400,4ptp4l0-21swapper/000:22:590
134491400,4ptp4l0-21swapper/000:11:520
134491400,3ptp4l8708-21strings22:40:232
134491400,3ptp4l31359-21meminfo21:10:220
134491400,3ptp4l22469-21meminfo23:10:210
134491400,3ptp4l10421-21ls19:15:200
134491400,3ptp4l0-21swapper/020:20:490
715699399,16cyclictest26487-21entropy23:20:160
134491390,6ptp4l0-21swapper/319:06:463
134491390,5ptp4l0-21swapper/022:20:120
134491390,4ptp4l28186-21unixbench_singl00:30:290
134491390,4ptp4l0-21swapper/322:11:193
134491390,4ptp4l0-21swapper/321:50:123
134491390,4ptp4l0-21swapper/320:45:163
134491390,4ptp4l0-21swapper/320:35:583
134491390,4ptp4l0-21swapper/319:40:263
134491390,4ptp4l0-21swapper/300:20:233
134491390,4ptp4l0-21swapper/223:50:272
134491390,4ptp4l0-21swapper/200:36:332
134491390,4ptp4l0-21swapper/200:15:032
134491390,4ptp4l0-21swapper/121:45:191
134491390,4ptp4l0-21swapper/121:15:171
134491390,4ptp4l0-21swapper/119:50:141
134491390,4ptp4l0-21swapper/119:40:241
134491390,4ptp4l0-21swapper/021:35:250
134491390,4ptp4l0-21swapper/020:05:190
134491390,4ptp4l0-21swapper/020:01:350
134491390,4ptp4l0-21swapper/000:05:150
134491390,3ptp4l28375-21hddtemp_smartct19:55:181
134491390,3ptp4l21558-21iostat20:50:182
134491390,3ptp4l0-21swapper/322:23:013
134491390,3ptp4l0-21swapper/319:55:583
134491390,3ptp4l0-21swapper/222:15:142
134491390,3ptp4l0-21swapper/221:15:132
134491390,3ptp4l0-21swapper/220:11:592
7158993833,3cyclictest33-21ksoftirqd/219:30:362
134491380,4ptp4l0-21swapper/319:10:553
134491380,4ptp4l0-21swapper/122:10:131
134491380,3ptp4l0-21swapper/319:18:083
134491370,4ptp4l0-21swapper/120:05:101
134491370,3ptp4l0-21swapper/322:15:173
134491370,3ptp4l0-21swapper/121:30:041
134491360,3ptp4l0-21swapper/300:33:343
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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