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2026-07-31 - 03:35
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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 792 highest latencies:
System rackdslot1.osadl.org (updated Fri Jul 31, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210621810,5sleep10-21swapper/119:05:121
1780521390,2sleep1437299cyclictest00:15:191
137872800,24sleep233-21ksoftirqd/221:50:132
4374996711,53cyclictest27940-21chrt00:35:503
437499668,11cyclictest28001-21df_abs20:00:143
437499668,11cyclictest27992-21apt-config23:30:003
4374996412,49cyclictest11214-21chrt21:44:493
437499637,11cyclictest20917-21cpuspeed_turbos20:55:143
437499637,11cyclictest2088-21latency_hist20:15:003
4374996311,15cyclictest3307-21iostat_ios23:45:173
437499626,16cyclictest0-21swapper/321:45:143
4374996210,50cyclictest0-21swapper/320:20:193
134491620,4ptp4l27609-21sendmail-msp22:20:021
134491620,4ptp4l0-21swapper/222:55:282
437499619,9cyclictest23895-21latency_hist00:29:593
437499617,11cyclictest31583-21cat22:25:283
4374996111,9cyclictest28547-21sed22:20:193
134491610,21ptp4l29192-21needreboot23:30:221
437499609,11cyclictest21204-21cut19:45:193
437499606,12cyclictest13828-21/usr/sbin/munin20:40:193
134491600,4ptp4l31778-21mailstats23:35:261
134491600,4ptp4l0-21swapper/323:15:083
134491600,4ptp4l0-21swapper/221:55:132
134491600,4ptp4l0-21swapper/100:30:181
134491600,3ptp4l0-21swapper/120:20:251
437499599,17cyclictest14995-21irqrtprio23:00:233
437499598,16cyclictest18188-21latency_hist20:50:003
437499589,11cyclictest26222-21wc21:05:183
437499588,9cyclictest436-21if_enp1s022:30:183
437499588,9cyclictest0-21swapper/320:20:003
437499586,15cyclictest0-21swapper/300:20:003
437499586,11cyclictest7226-21df_abs20:25:143
437499585,9cyclictest16541-21ps19:35:193
19762580,4sleep11980-21unixbench_multi23:40:291
134491580,3ptp4l0-21swapper/022:11:150
437499577,17cyclictest1922-21Xorg00:10:313
437499575,10cyclictest10750-21cat20:30:263
437499569,10cyclictest24295-21ntp_kernel_pll_22:10:243
437499569,10cyclictest14197-21cut21:50:163
437499565,10cyclictest2657-21df_abs22:35:133
134491560,4ptp4l0-21swapper/220:51:402
134491560,4ptp4l0-21swapper/219:15:152
134491560,3ptp4l0-21swapper/222:45:552
437499559,11cyclictest18847-21grep20:50:153
437499559,11cyclictest0-21swapper/321:15:183
134491550,5ptp4l0-21swapper/022:52:320
134491550,3ptp4l0-21swapper/222:30:262
134491550,11ptp4l1992-21apt-get19:05:110
437499546,16cyclictest20496-21phc2sys00:20:243
437499546,15cyclictest9061-21/usr/sbin/munin19:20:253
134491540,4ptp4l0-21swapper/222:41:532
134491540,3ptp4l0-21swapper/220:20:382
134491540,3ptp4l0-21swapper/220:07:512
134491540,3ptp4l0-21swapper/220:07:512
134491540,3ptp4l0-21swapper/121:12:261
134491540,3ptp4l0-21swapper/120:00:111
134491540,3ptp4l0-21swapper/021:30:170
437499534,11cyclictest0-21swapper/323:10:263
4373995317,4cyclictest33-21ksoftirqd/223:55:002
134491530,5ptp4l0-21swapper/100:23:521
134491530,4ptp4l0-21swapper/221:36:512
134491530,4ptp4l0-21swapper/220:31:102
134491530,4ptp4l0-21swapper/200:31:122
134491530,4ptp4l0-21swapper/123:54:581
134491530,4ptp4l0-21swapper/120:05:251
134491530,4ptp4l0-21swapper/120:05:251
134491530,4ptp4l0-21swapper/022:17:400
134491530,3ptp4l0-21swapper/221:02:072
134491530,12ptp4l0-21swapper/223:00:232
437499524,15cyclictest30222-21df_abs20:05:133
437499524,15cyclictest30222-21df_abs20:05:133
134491520,4ptp4l0-21swapper/223:09:442
134491520,4ptp4l0-21swapper/122:21:181
134491520,4ptp4l0-21swapper/000:06:440
437499517,7cyclictest23820-21taskset19:50:193
437499515,8cyclictest25553-21latency_hist23:25:003
134491510,4ptp4l0-21swapper/219:14:202
134491510,3ptp4l0-21swapper/220:40:252
134491510,3ptp4l0-21swapper/219:27:032
134491510,3ptp4l0-21swapper/200:21:122
134491510,3ptp4l0-21swapper/020:41:340
134491510,17ptp4l25-21ksoftirqd/120:37:501
437499508,40cyclictest0-21swapper/300:34:083
437499508,17cyclictest5801-21ntp_states22:40:233
134491500,4ptp4l0-21swapper/219:50:072
134491500,4ptp4l0-21swapper/020:02:430
134491500,4ptp4l0-21swapper/019:54:150
134491500,4ptp4l0-21swapper/019:40:150
437499498,14cyclictest11514-21/usr/sbin/munin20:35:163
437499494,11cyclictest8963-21switchtime23:55:263
134491490,4ptp4l0-21swapper/022:41:460
134491490,4ptp4l0-21swapper/019:39:570
134491490,3ptp4l0-21swapper/022:07:370
437499489,7cyclictest6216-21ntp_states23:50:233
437499489,11cyclictest17117-21needreboot21:55:223
437499488,7cyclictest21923-21ls22:05:223
437499488,10cyclictest0-21swapper/323:35:153
437499485,9cyclictest19609-21ps22:00:273
437499485,9cyclictest19609-21ps22:00:273
4373994838,2cyclictest134491ptp4l21:45:252
4373994812,5cyclictest33-21ksoftirqd/222:20:012
134491480,4ptp4l11738-21df20:35:132
134491480,4ptp4l0-21swapper/123:27:321
134491480,4ptp4l0-21swapper/021:15:110
134491480,4ptp4l0-21swapper/000:26:100
134491480,13ptp4l0-21swapper/100:04:091
134491470,9ptp4l0-21swapper/223:29:552
134491470,4ptp4l0-21swapper/220:10:292
134491470,3ptp4l0-21swapper/200:25:162
437499469,14cyclictest28132-21gdbus23:30:013
437499465,8cyclictest26826-21mailstats22:15:263
4373994641,3cyclictest33-21ksoftirqd/200:00:002
4373994617,4cyclictest33-21ksoftirqd/221:20:262
134491460,5ptp4l2318-21gnome-shell21:11:583
134491460,4ptp4l0-21swapper/123:10:501
134491460,4ptp4l0-21swapper/023:58:460
134491460,3ptp4l0-21swapper/019:16:540
437499457,35cyclictest0-21swapper/321:30:273
4373994539,3cyclictest33-21ksoftirqd/200:05:012
4373994533,9cyclictest33-21ksoftirqd/222:50:292
4373994510,3cyclictest33-21ksoftirqd/219:45:252
134491450,9ptp4l0-21swapper/319:25:423
134491450,8ptp4l0-21swapper/020:47:270
134491450,5ptp4l2318-21gnome-shell21:12:582
134491450,4ptp4l0-21swapper/120:30:051
134491450,10ptp4l0-21swapper/219:39:482
134491450,10ptp4l0-21swapper/119:41:221
4373994432,9cyclictest33-21ksoftirqd/221:40:282
4373994411,5cyclictest33-21ksoftirqd/223:40:232
134491440,9ptp4l0-21swapper/119:57:311
134491440,4ptp4l0-21swapper/122:32:111
134491440,3ptp4l0-21swapper/020:36:330
134491440,10ptp4l0-21swapper/222:09:272
437499438,15cyclictest18266-21/usr/sbin/munin19:40:243
4373994337,3cyclictest33-21ksoftirqd/220:55:202
4373994337,3cyclictest33-21ksoftirqd/200:15:592
4373994330,10cyclictest33-21ksoftirqd/222:35:112
134491430,9ptp4l0-21swapper/223:18:002
134491430,5ptp4l25-21ksoftirqd/120:55:271
134491430,5ptp4l0-21swapper/000:10:200
134491430,4ptp4l9-21ksoftirqd/020:15:130
134491430,4ptp4l30464-21apt-get23:35:122
134491430,4ptp4l0-21swapper/219:24:432
134491430,4ptp4l0-21swapper/023:40:210
134491430,3ptp4l26230-21apt-get00:35:122
134491430,3ptp4l0-21swapper/222:20:042
134491430,3ptp4l0-21swapper/219:58:002
134491430,3ptp4l0-21swapper/119:46:361
134491430,3ptp4l0-21swapper/023:22:200
134491430,3ptp4l0-21swapper/022:49:100
134491430,3ptp4l0-21swapper/021:35:280
437499425,9cyclictest5610-21ps19:10:233
4373994237,3cyclictest33-21ksoftirqd/223:30:152
4373994237,3cyclictest33-21ksoftirqd/221:10:002
134491420,5ptp4l2715-21/usr/sbin/munin21:25:171
134491420,5ptp4l10660-21/usr/sbin/munin22:50:241
134491420,5ptp4l0-21swapper/220:00:012
134491420,5ptp4l0-21swapper/120:50:241
134491420,5ptp4l0-21swapper/020:55:240
134491420,4ptp4l6816-21apt-get22:45:041
134491420,4ptp4l31777-21users22:25:290
134491420,4ptp4l17578-21ntp_states23:05:260
134491420,4ptp4l14723-21apt-get00:10:172
134491420,4ptp4l13043-21users19:25:280
134491420,3ptp4l441-21in:imuxsock20:45:241
134491420,10ptp4l0-21swapper/322:49:193
437399419,5cyclictest33-21ksoftirqd/220:45:142
4373994135,3cyclictest33-21ksoftirqd/219:33:582
4373994111,3cyclictest33-21ksoftirqd/219:40:152
134491410,8ptp4l0-21swapper/019:57:270
134491410,5ptp4l0-21swapper/321:35:123
134491410,5ptp4l0-21swapper/319:30:153
134491410,5ptp4l0-21swapper/300:05:143
134491410,5ptp4l0-21swapper/222:10:212
134491410,5ptp4l0-21swapper/123:15:231
134491410,5ptp4l0-21swapper/122:40:131
134491410,5ptp4l0-21swapper/121:20:201
134491410,5ptp4l0-21swapper/119:50:161
134491410,5ptp4l0-21swapper/119:31:031
134491410,5ptp4l0-21swapper/019:46:280
134491410,4ptp4l2521-21diskstats21:25:152
134491410,4ptp4l24141-21df00:30:140
134491410,4ptp4l0-21swapper/300:00:123
134491410,4ptp4l0-21swapper/223:10:272
134491410,4ptp4l0-21swapper/221:15:512
134491410,4ptp4l0-21swapper/220:28:562
134491410,4ptp4l0-21swapper/123:55:161
134491410,4ptp4l0-21swapper/121:18:581
134491410,4ptp4l0-21swapper/121:01:431
134491410,4ptp4l0-21swapper/023:50:280
134491410,4ptp4l0-21swapper/023:45:280
134491410,4ptp4l0-21swapper/022:20:490
134491410,4ptp4l0-21swapper/021:59:210
134491410,4ptp4l0-21swapper/021:44:240
134491410,4ptp4l0-21swapper/019:23:200
134491410,3ptp4l5598-21ls20:20:220
134491410,3ptp4l4519-21apt-get21:30:122
134491410,3ptp4l4030-21users22:35:280
134491410,3ptp4l3850-21ntp_states23:45:222
134491410,3ptp4l18393-21apt-get22:00:132
134491410,3ptp4l18393-21apt-get22:00:132
437399401,2cyclictest121rcu_preempt20:17:092
134491400,5ptp4l0-21swapper/120:41:121
134491400,5ptp4l0-21swapper/100:05:221
134491400,5ptp4l0-21swapper/021:20:120
134491400,5ptp4l0-21swapper/019:30:080
134491400,4ptp4l9848-21df22:50:143
134491400,4ptp4l6017-21ls21:30:271
134491400,4ptp4l22221-21sed00:25:191
134491400,4ptp4l0-21swapper/322:55:313
134491400,4ptp4l0-21swapper/321:25:153
134491400,4ptp4l0-21swapper/223:23:372
134491400,4ptp4l0-21swapper/123:47:481
134491400,4ptp4l0-21swapper/123:23:521
134491400,4ptp4l0-21swapper/122:35:161
134491400,4ptp4l0-21swapper/121:57:071
134491400,4ptp4l0-21swapper/121:47:151
134491400,4ptp4l0-21swapper/121:43:241
134491400,4ptp4l0-21swapper/120:26:001
134491400,4ptp4l0-21swapper/120:10:271
134491400,4ptp4l0-21swapper/119:20:261
134491400,4ptp4l0-21swapper/100:35:031
134491400,4ptp4l0-21swapper/023:31:550
134491400,4ptp4l0-21swapper/023:25:130
134491400,4ptp4l0-21swapper/023:10:170
134491400,4ptp4l0-21swapper/022:55:200
134491400,4ptp4l0-21swapper/022:02:560
134491400,4ptp4l0-21swapper/022:02:560
134491400,4ptp4l0-21swapper/021:53:520
134491400,4ptp4l0-21swapper/021:25:280
134491400,4ptp4l0-21swapper/021:13:430
134491400,4ptp4l0-21swapper/021:07:400
134491400,4ptp4l0-21swapper/020:53:570
134491400,4ptp4l0-21swapper/020:05:170
134491400,4ptp4l0-21swapper/020:05:170
134491400,4ptp4l0-21swapper/019:10:420
134491400,4ptp4l0-21swapper/000:20:160
134491400,4ptp4l0-21swapper/000:15:170
134491400,3ptp4l663-21irqstats21:20:193
134491400,3ptp4l1491-21ntp_states23:40:243
134491400,3ptp4l10768-21irqstats00:00:200
134491400,3ptp4l0-21swapper/021:04:340
134491390,5ptp4l0-21swapper/121:35:291
134491390,4ptp4l11486-21cpuspeed_turbos19:25:141
134491390,4ptp4l0-21swapper/323:06:103
134491390,4ptp4l0-21swapper/321:00:173
134491390,4ptp4l0-21swapper/319:15:303
134491390,4ptp4l0-21swapper/222:25:042
134491390,4ptp4l0-21swapper/200:05:282
134491390,4ptp4l0-21swapper/123:05:221
134491390,4ptp4l0-21swapper/122:55:361
134491390,4ptp4l0-21swapper/122:25:411
134491390,4ptp4l0-21swapper/122:11:301
134491390,4ptp4l0-21swapper/122:05:201
134491390,4ptp4l0-21swapper/122:04:231
134491390,4ptp4l0-21swapper/122:04:231
134491390,4ptp4l0-21swapper/121:05:331
134491390,4ptp4l0-21swapper/119:36:221
134491390,4ptp4l0-21swapper/119:19:541
134491390,4ptp4l0-21swapper/119:10:231
134491390,4ptp4l0-21swapper/023:35:180
134491390,4ptp4l0-21swapper/023:19:580
134491390,4ptp4l0-21swapper/020:30:200
134491390,4ptp4l0-21swapper/020:10:330
134491390,4ptp4l0-21swapper/000:38:280
134491390,3ptp4l0-21swapper/100:11:221
134491390,2ptp4l7235-21df_inode20:25:150
134491380,4ptp4l0-21swapper/123:02:281
134491380,4ptp4l0-21swapper/022:30:180
134491380,3ptp4l0-21swapper/319:55:093
134491370,3ptp4l0-21swapper/121:50:181
134491370,3ptp4l0-21swapper/023:03:050
134491370,3ptp4l0-21swapper/021:45:110
134491360,3ptp4l0-21swapper/120:17:171
19902215,10sleep30-21swapper/319:05:113
37782203,3sleep20-21swapper/219:06:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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