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2025-12-21 - 12:09
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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 Sun Dec 21, 2025 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5827996132,4cyclictest41-21ksoftirqd/319:26:393
5827996124,10cyclictest41-21ksoftirqd/321:10:223
182442610,4sleep30-21swapper/320:45:203
134491600,4ptp4l1980-21iostat23:40:180
134491600,4ptp4l0-21swapper/122:05:211
134491590,4ptp4l0-21swapper/221:00:352
134491590,3ptp4l0-21swapper/200:03:472
134491580,3ptp4l0-21swapper/300:15:293
134491560,3ptp4l0-21swapper/219:15:022
134491560,3ptp4l0-21swapper/020:25:250
134491560,3ptp4l0-21swapper/020:05:220
134491560,3ptp4l0-21swapper/000:05:290
134491550,4ptp4l0-21swapper/023:10:280
134491550,3ptp4l0-21swapper/020:30:200
134491540,4ptp4l0-21swapper/222:20:122
134491540,14ptp4l0-21swapper/200:20:212
5827995310,8cyclictest41-21ksoftirqd/322:50:213
134491530,4ptp4l0-21swapper/321:42:193
134491530,4ptp4l0-21swapper/320:56:563
134491530,3ptp4l0-21swapper/021:25:280
134491530,10ptp4l0-21swapper/021:05:160
5827995217,5cyclictest41-21ksoftirqd/319:45:163
134491520,5ptp4l0-21swapper/119:09:491
134491520,4ptp4l0-21swapper/100:12:341
134491520,3ptp4l0-21swapper/122:25:261
134491520,3ptp4l0-21swapper/122:25:261
134491520,3ptp4l0-21swapper/100:34:551
582799518,10cyclictest41-21ksoftirqd/320:42:223
5827995116,6cyclictest41-21ksoftirqd/323:35:223
134491510,4ptp4l0-21swapper/023:20:040
134491510,4ptp4l0-21swapper/020:48:370
134491510,3ptp4l0-21swapper/221:27:462
134491510,3ptp4l0-21swapper/119:46:191
5827995018,9cyclictest41-21ksoftirqd/322:55:243
5827995018,9cyclictest41-21ksoftirqd/322:55:243
5827995015,9cyclictest41-21ksoftirqd/320:34:593
5827995012,7cyclictest41-21ksoftirqd/321:18:003
134491500,4ptp4l0-21swapper/222:19:302
134491500,4ptp4l0-21swapper/219:56:102
134491500,4ptp4l0-21swapper/119:17:331
134491500,4ptp4l0-21swapper/021:20:220
5827994933,4cyclictest41-21ksoftirqd/323:41:533
5827994912,6cyclictest41-21ksoftirqd/321:02:483
5825994919,7cyclictest25-21ksoftirqd/121:59:591
5825994918,4cyclictest25-21ksoftirqd/120:35:221
134491490,4ptp4l0-21swapper/322:44:263
134491490,4ptp4l0-21swapper/123:07:561
134491490,4ptp4l0-21swapper/120:29:491
134491490,4ptp4l0-21swapper/119:50:031
134491490,4ptp4l0-21swapper/119:50:031
134491490,4ptp4l0-21swapper/119:30:331
134491490,4ptp4l0-21swapper/119:25:371
134491490,4ptp4l0-21swapper/020:59:470
134491490,4ptp4l0-21swapper/019:53:560
134491490,4ptp4l0-21swapper/019:53:560
134491490,4ptp4l0-21swapper/000:28:080
134491490,3ptp4l0-21swapper/221:15:162
134491490,3ptp4l0-21swapper/123:44:231
134491490,3ptp4l0-21swapper/122:34:261
134491490,3ptp4l0-21swapper/022:55:000
582799486,9cyclictest41-21ksoftirqd/319:15:173
5827994834,3cyclictest41-21ksoftirqd/320:54:503
582799483,3cyclictest121rcu_preempt22:49:253
582799483,2cyclictest121rcu_preempt19:10:283
5827994816,4cyclictest41-21ksoftirqd/322:20:263
5826994835,10cyclictest321ktimersoftd/223:50:242
5826994811,7cyclictest33-21ksoftirqd/200:39:212
5825994812,9cyclictest25-21ksoftirqd/122:55:001
134491480,4ptp4l0-21swapper/321:52:033
134491480,4ptp4l0-21swapper/320:27:133
134491480,4ptp4l0-21swapper/120:32:401
134491480,4ptp4l0-21swapper/120:11:571
134491480,4ptp4l0-21swapper/023:05:180
134491480,3ptp4l0-21swapper/100:15:081
5827994737,3cyclictest41-21ksoftirqd/323:55:223
5826994714,4cyclictest33-21ksoftirqd/221:50:002
5825994717,7cyclictest25-21ksoftirqd/122:45:251
134491470,4ptp4l0-21swapper/221:51:512
134491470,4ptp4l0-21swapper/123:26:021
134491470,4ptp4l0-21swapper/021:58:310
134491470,4ptp4l0-21swapper/021:38:060
134491470,4ptp4l0-21swapper/019:12:010
134491470,11ptp4l0-21swapper/120:00:291
5827994610,7cyclictest41-21ksoftirqd/319:59:593
5825994613,4cyclictest25-21ksoftirqd/119:40:161
5825994613,3cyclictest25-21ksoftirqd/121:30:001
134491460,4ptp4l0-21swapper/322:02:133
134491460,4ptp4l0-21swapper/300:24:193
134491460,4ptp4l0-21swapper/123:59:501
134491460,4ptp4l0-21swapper/023:30:390
134491460,4ptp4l0-21swapper/022:24:160
134491460,3ptp4l0-21swapper/123:13:191
134491460,3ptp4l0-21swapper/023:48:190
134491460,3ptp4l0-21swapper/023:36:240
134491460,10ptp4l0-21swapper/020:16:200
582799453,6cyclictest41-21ksoftirqd/319:36:063
5827994533,3cyclictest41-21ksoftirqd/300:12:473
5827994529,13cyclictest41-21ksoftirqd/320:09:583
5827994527,5cyclictest41-21ksoftirqd/323:29:103
5827994515,8cyclictest41-21ksoftirqd/300:05:163
5826994533,5cyclictest33-21ksoftirqd/220:15:282
582699450,2cyclictest121rcu_preempt00:27:592
5825994513,7cyclictest25-21ksoftirqd/121:05:011
5825994513,6cyclictest25-21ksoftirqd/119:12:571
134491450,6ptp4l4428-21ls19:05:180
134491450,6ptp4l0-21swapper/321:37:513
134491450,3ptp4l0-21swapper/223:49:342
134491450,3ptp4l0-21swapper/122:19:591
134491450,3ptp4l0-21swapper/121:36:551
5827994433,3cyclictest41-21ksoftirqd/322:09:463
5827994433,3cyclictest41-21ksoftirqd/300:04:213
5827994428,8cyclictest41-21ksoftirqd/323:21:283
5827994413,9cyclictest41-21ksoftirqd/321:05:193
582799441,2cyclictest121rcu_preempt23:16:353
582799441,2cyclictest121rcu_preempt19:34:533
582699446,2cyclictest0-21swapper/222:01:422
5826994433,3cyclictest33-21ksoftirqd/219:10:122
5826994414,4cyclictest33-21ksoftirqd/221:39:462
5825994432,9cyclictest25-21ksoftirqd/121:00:001
5825994426,8cyclictest25-21ksoftirqd/122:21:181
5825994418,8cyclictest25-21ksoftirqd/119:57:261
5825994418,6cyclictest25-21ksoftirqd/122:39:541
5825994412,7cyclictest25-21ksoftirqd/120:19:121
5825994411,4cyclictest25-21ksoftirqd/123:35:221
134491440,9ptp4l0-21swapper/021:30:320
134491440,4ptp4l31340-21apt-get22:25:140
134491440,4ptp4l31340-21apt-get22:25:130
134491440,4ptp4l0-21swapper/320:03:093
134491440,3ptp4l0-21swapper/122:13:181
134491440,3ptp4l0-21swapper/020:50:020
582799439,6cyclictest41-21ksoftirqd/322:35:193
582799435,9cyclictest41-21ksoftirqd/322:10:163
5827994332,9cyclictest41-21ksoftirqd/323:30:283
582799430,2cyclictest121rcu_preempt23:45:233
5826994338,3cyclictest33-21ksoftirqd/223:20:002
5826994331,3cyclictest33-21ksoftirqd/220:40:112
5826994330,4cyclictest33-21ksoftirqd/222:10:242
5826994330,4cyclictest33-21ksoftirqd/219:23:582
5826994330,11cyclictest33-21ksoftirqd/222:55:002
582599439,4cyclictest25-21ksoftirqd/120:20:151
582599438,7cyclictest25-21ksoftirqd/120:05:281
582599435,7cyclictest25-21ksoftirqd/123:20:201
5825994337,3cyclictest25-21ksoftirqd/120:50:001
5825994314,7cyclictest25-21ksoftirqd/120:50:141
5825994314,4cyclictest25-21ksoftirqd/121:07:071
5825994312,7cyclictest25-21ksoftirqd/121:15:101
5825994312,3cyclictest25-21ksoftirqd/121:22:401
134491430,9ptp4l0-21swapper/220:58:442
134491430,9ptp4l0-21swapper/200:07:432
134491430,4ptp4l0-21swapper/221:07:512
134491430,3ptp4l0-21swapper/019:57:460
134491430,3ptp4l0-21swapper/000:00:180
582799424,2cyclictest121rcu_preempt23:55:003
5827994237,3cyclictest41-21ksoftirqd/319:50:243
5827994237,3cyclictest41-21ksoftirqd/319:50:243
5827994236,3cyclictest41-21ksoftirqd/320:15:203
582799423,2cyclictest121rcu_preempt20:10:303
5827994227,5cyclictest41-21ksoftirqd/321:59:523
5827994224,9cyclictest41-21ksoftirqd/322:28:013
5827994224,9cyclictest41-21ksoftirqd/322:28:013
582799422,3cyclictest0-21swapper/321:45:573
582799422,2cyclictest121rcu_preempt19:20:143
582799420,3cyclictest121rcu_preempt21:26:033
5826994237,3cyclictest33-21ksoftirqd/200:35:002
5826994237,3cyclictest33-21ksoftirqd/200:00:002
5826994230,3cyclictest33-21ksoftirqd/222:55:162
5826994230,3cyclictest33-21ksoftirqd/222:55:162
5826994228,5cyclictest33-21ksoftirqd/222:36:582
5825994216,7cyclictest25-21ksoftirqd/122:55:431
5825994216,7cyclictest25-21ksoftirqd/122:55:431
5825994214,8cyclictest25-21ksoftirqd/123:54:591
5825994211,7cyclictest25-21ksoftirqd/121:41:101
582599420,3cyclictest134691getstats21:45:101
134491420,9ptp4l0-21swapper/223:08:302
134491420,9ptp4l0-21swapper/200:15:422
134491420,5ptp4l0-21swapper/020:35:270
134491420,4ptp4l29080-21apt-get21:10:102
134491420,4ptp4l28944-21apt-get20:00:150
134491420,4ptp4l27415-21apt-get00:35:121
134491420,4ptp4l1275-21apt-get21:20:133
134491420,4ptp4l0-21swapper/222:08:002
134491420,4ptp4l0-21swapper/119:22:371
134491420,3ptp4l0-21swapper/021:43:340
134491420,3ptp4l0-21swapper/000:37:290
134491420,2ptp4l121rcu_preempt22:17:000
5827994136,3cyclictest41-21ksoftirqd/300:25:263
5827994135,4cyclictest41-21ksoftirqd/322:32:163
5827994127,7cyclictest41-21ksoftirqd/300:32:093
582799412,6cyclictest121rcu_preempt23:13:063
582799411,2cyclictest41-21ksoftirqd/300:40:013
582799411,2cyclictest121rcu_preempt19:40:393
5826994137,3cyclictest33-21ksoftirqd/221:34:592
5826994126,6cyclictest33-21ksoftirqd/223:44:592
582699412,5cyclictest121rcu_preempt20:50:132
582599417,4cyclictest25-21ksoftirqd/123:15:161
5825994136,3cyclictest25-21ksoftirqd/123:45:191
582599410,3cyclictest121rcu_preempt00:00:241
134491410,9ptp4l0-21swapper/223:38:252
134491410,9ptp4l0-21swapper/223:14:182
134491410,9ptp4l0-21swapper/219:45:362
134491410,7ptp4l9-21ksoftirqd/021:54:400
134491410,5ptp4l0-21swapper/023:50:150
134491410,5ptp4l0-21swapper/023:03:300
134491410,5ptp4l0-21swapper/022:30:270
134491410,4ptp4l20044-21diskstats19:40:160
134491410,4ptp4l18483-21ntp_states20:45:222
134491410,4ptp4l13592-21iostat_ios22:55:200
134491410,4ptp4l13592-21iostat_ios22:55:200
134491410,4ptp4l0-21swapper/321:30:273
134491410,3ptp4l8781-21iostat22:45:190
134491410,3ptp4l8215-21apt-get22:45:122
134491410,3ptp4l0-21swapper/000:20:180
582799403,5cyclictest121rcu_preempt23:09:053
582799401,3cyclictest121rcu_preempt22:18:443
5827994010,4cyclictest41-21ksoftirqd/320:40:003
582799400,2cyclictest121rcu_preempt20:22:193
582699409,8cyclictest33-21ksoftirqd/222:35:002
5826994035,3cyclictest33-21ksoftirqd/220:20:202
5826994027,4cyclictest33-21ksoftirqd/200:10:172
582699400,6cyclictest33-21ksoftirqd/221:40:252
582599402,7cyclictest25-21ksoftirqd/123:30:231
134491400,6ptp4l19810-21/usr/sbin/munin22:00:231
134491400,5ptp4l0-21swapper/020:40:140
134491400,5ptp4l0-21swapper/020:10:220
134491400,4ptp4l18567-21iostat_ios00:15:180
134491400,4ptp4l16279-21/usr/sbin/munin23:00:221
134491400,4ptp4l0-21swapper/100:20:281
134491400,4ptp4l0-21swapper/023:26:460
134491400,4ptp4l0-21swapper/023:15:150
134491400,4ptp4l0-21swapper/022:11:260
134491400,4ptp4l0-21swapper/021:13:480
134491400,4ptp4l0-21swapper/021:03:280
134491400,4ptp4l0-21swapper/019:45:150
134491400,4ptp4l0-21swapper/019:31:240
134491400,3ptp4l20944-21ntp_states22:00:230
134491400,3ptp4l14130-21ls00:05:221
5827993932,5cyclictest41-21ksoftirqd/323:04:053
5826993934,3cyclictest33-21ksoftirqd/220:30:292
5826993934,3cyclictest33-21ksoftirqd/220:05:002
5826993927,3cyclictest33-21ksoftirqd/220:05:172
582699391,4cyclictest33-21ksoftirqd/219:35:242
582599399,3cyclictest25-21ksoftirqd/121:10:191
582599399,3cyclictest25-21ksoftirqd/100:29:341
5825993934,3cyclictest25-21ksoftirqd/121:30:221
134491390,5ptp4l0-21swapper/019:15:190
134491390,4ptp4l0-21swapper/223:26:082
134491390,4ptp4l0-21swapper/223:00:462
134491390,4ptp4l0-21swapper/222:40:242
134491390,4ptp4l0-21swapper/222:26:482
134491390,4ptp4l0-21swapper/222:26:472
134491390,4ptp4l0-21swapper/221:55:582
134491390,4ptp4l0-21swapper/221:22:112
134491390,4ptp4l0-21swapper/220:27:212
134491390,4ptp4l0-21swapper/219:41:082
134491390,4ptp4l0-21swapper/219:33:442
134491390,4ptp4l0-21swapper/219:26:522
134491390,4ptp4l0-21swapper/122:42:381
134491390,4ptp4l0-21swapper/023:55:240
134491390,4ptp4l0-21swapper/022:41:430
134491390,4ptp4l0-21swapper/022:35:090
134491390,4ptp4l0-21swapper/022:09:040
134491390,4ptp4l0-21swapper/021:45:170
134491390,4ptp4l0-21swapper/019:35:200
134491390,4ptp4l0-21swapper/000:35:000
134491390,4ptp4l0-21swapper/000:10:150
134491390,3ptp4l13337-21iostat19:25:210
134491390,3ptp4l0-21swapper/121:52:071
134491390,3ptp4l0-21swapper/021:15:400
134491380,4ptp4l6040-21df_abs20:20:160
134491380,4ptp4l0-21swapper/223:30:072
134491380,4ptp4l0-21swapper/223:20:492
134491380,4ptp4l0-21swapper/220:38:362
134491380,4ptp4l0-21swapper/220:12:232
134491380,4ptp4l0-21swapper/219:51:162
134491380,4ptp4l0-21swapper/219:51:162
134491380,4ptp4l0-21swapper/120:40:071
134491380,3ptp4l11818-21python19:20:260
134491380,3ptp4l0-21swapper/119:35:301
37992223,13sleep23915-21/usr/sbin/munin19:05:142
34932163,7sleep30-21swapper/319:05:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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