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2026-03-25 - 10:39
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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 rackdslot1.osadl.org (updated Wed Mar 25, 2026 00:45:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491700,4ptp4l0-21swapper/219:50:192
7007996229,6cyclictest25-21ksoftirqd/123:30:241
7007996127,4cyclictest25-21ksoftirqd/123:25:261
7007996124,6cyclictest25-21ksoftirqd/121:20:131
134491610,4ptp4l15421-21open_inodes21:45:250
134491610,4ptp4l15421-21open_inodes21:45:250
700799592,12cyclictest0-21swapper/122:30:131
700799591,56cyclictest11372-21kworker/1:020:01:091
134491590,5ptp4l0-21swapper/023:15:250
134491590,4ptp4l0-21swapper/121:00:571
7007995827,6cyclictest25-21ksoftirqd/100:05:241
700799582,16cyclictest29133-21sed22:15:201
134491580,4ptp4l0-21swapper/222:49:102
7007995729,10cyclictest25-21ksoftirqd/122:50:291
313632570,4sleep20-21swapper/221:10:232
134491560,5ptp4l0-21swapper/019:09:530
134491560,4ptp4l0-21swapper/200:06:192
7008995539,8cyclictest33-21ksoftirqd/223:59:592
700799555,11cyclictest0-21swapper/121:56:581
7007995519,8cyclictest25-21ksoftirqd/120:20:581
7007995519,4cyclictest25-21ksoftirqd/119:48:091
205002550,5sleep233-21ksoftirqd/200:15:242
134491550,4ptp4l0-21swapper/323:19:223
134491550,3ptp4l0-21swapper/020:43:420
7007995419,4cyclictest25-21ksoftirqd/120:08:541
134491540,3ptp4l0-21swapper/022:24:430
700799533,7cyclictest0-21swapper/120:40:151
700799532,6cyclictest0-21swapper/122:40:231
700799531,6cyclictest25-21ksoftirqd/119:35:171
134491530,3ptp4l0-21swapper/322:30:133
134491530,3ptp4l0-21swapper/000:35:240
700799524,6cyclictest0-21swapper/100:20:251
700799522,6cyclictest0-21swapper/120:10:211
700799520,7cyclictest25-21ksoftirqd/121:30:251
134491520,4ptp4l0-21swapper/319:23:273
134491520,4ptp4l0-21swapper/220:49:122
134491520,12ptp4l0-21swapper/300:39:193
700799512,8cyclictest0-21swapper/120:25:121
700799512,11cyclictest0-21swapper/100:10:241
134491510,4ptp4l0-21swapper/220:36:292
134491510,3ptp4l0-21swapper/300:01:063
134491510,3ptp4l0-21swapper/119:10:191
134491510,3ptp4l0-21swapper/019:39:250
134491510,10ptp4l4980-21diskstats19:05:161
700799502,6cyclictest25-21ksoftirqd/123:45:011
7007995018,4cyclictest25-21ksoftirqd/121:35:401
134491500,11ptp4l0-21swapper/322:45:123
700799496,10cyclictest0-21swapper/123:52:441
700799495,6cyclictest0-21swapper/100:01:181
700799492,5cyclictest25-21ksoftirqd/120:30:261
134491490,4ptp4l0-21swapper/320:04:503
134491490,4ptp4l0-21swapper/319:46:113
134491490,4ptp4l0-21swapper/220:03:302
134491490,4ptp4l0-21swapper/219:42:052
134491490,4ptp4l0-21swapper/000:03:460
134491490,11ptp4l0-21swapper/223:26:512
7008994816,5cyclictest33-21ksoftirqd/200:25:232
700799484,6cyclictest0-21swapper/122:06:201
700799484,2cyclictest0-21swapper/121:40:241
700799480,7cyclictest25-21ksoftirqd/119:20:191
700799480,6cyclictest25-21ksoftirqd/119:55:261
134491480,4ptp4l0-21swapper/319:27:193
134491480,4ptp4l0-21swapper/319:27:193
134491480,4ptp4l0-21swapper/023:35:110
134491480,4ptp4l0-21swapper/023:35:100
134491480,4ptp4l0-21swapper/023:11:370
134491480,3ptp4l0-21swapper/123:12:001
134491480,3ptp4l0-21swapper/023:29:530
7008994717,5cyclictest33-21ksoftirqd/222:07:562
700799474,6cyclictest25-21ksoftirqd/123:35:151
700799474,6cyclictest25-21ksoftirqd/123:35:141
700799472,10cyclictest0-21swapper/122:00:251
700799470,6cyclictest25-21ksoftirqd/121:15:171
700799470,5cyclictest26223-21hddtemp_smartct23:20:161
134491470,4ptp4l0-21swapper/320:08:403
134491470,4ptp4l0-21swapper/223:24:062
134491470,4ptp4l0-21swapper/220:29:412
134491470,4ptp4l0-21swapper/000:34:140
134491470,13ptp4l0-21swapper/020:49:410
7008994615,4cyclictest33-21ksoftirqd/222:53:022
700799465,7cyclictest19729-21grep20:45:191
700799464,6cyclictest0-21swapper/122:35:521
700799464,6cyclictest0-21swapper/120:37:501
700799462,6cyclictest25-21ksoftirqd/100:25:191
700799462,11cyclictest0-21swapper/120:15:191
7007994616,6cyclictest25-21ksoftirqd/119:31:591
700799461,5cyclictest25-21ksoftirqd/122:20:241
700799460,7cyclictest25-21ksoftirqd/123:45:201
700799460,7cyclictest25-21ksoftirqd/121:45:141
700799460,7cyclictest25-21ksoftirqd/121:45:141
134491460,4ptp4l0-21swapper/319:55:133
134491460,4ptp4l0-21swapper/219:36:022
134491460,4ptp4l0-21swapper/022:53:370
134491460,4ptp4l0-21swapper/019:44:590
134491460,3ptp4l0-21swapper/219:22:532
134491460,3ptp4l0-21swapper/000:15:260
700899459,8cyclictest33-21ksoftirqd/223:03:332
7008994531,12cyclictest33-21ksoftirqd/223:45:002
7008994513,4cyclictest33-21ksoftirqd/222:17:322
700899451,2cyclictest121rcu_preempt22:55:202
7008994511,4cyclictest33-21ksoftirqd/221:43:262
7008994511,4cyclictest33-21ksoftirqd/219:27:382
7008994511,4cyclictest33-21ksoftirqd/219:27:382
700799454,5cyclictest0-21swapper/100:30:091
700799453,6cyclictest0-21swapper/119:40:541
700799452,6cyclictest0-21swapper/123:15:111
700799452,5cyclictest0-21swapper/122:45:131
700799451,6cyclictest25-21ksoftirqd/123:00:281
700799450,7cyclictest25-21ksoftirqd/119:15:271
134491450,5ptp4l28014-21apt-get19:55:112
134491450,4ptp4l0-21swapper/221:06:582
134491450,4ptp4l0-21swapper/220:07:222
134491450,3ptp4l0-21swapper/023:48:240
700899449,8cyclictest33-21ksoftirqd/222:40:062
700899448,4cyclictest33-21ksoftirqd/220:16:042
700899448,4cyclictest33-21ksoftirqd/200:37:522
700899443,2cyclictest121rcu_preempt22:20:102
7008994410,4cyclictest33-21ksoftirqd/223:50:002
7008994410,4cyclictest33-21ksoftirqd/222:36:572
700799443,9cyclictest25-21ksoftirqd/120:57:291
700799440,6cyclictest13934-21/usr/sbin/munin19:25:171
700799440,6cyclictest13934-21/usr/sbin/munin19:25:171
700799440,5cyclictest25-21ksoftirqd/121:10:131
700699440,2cyclictest134491ptp4l20:15:220
134491440,9ptp4l0-21swapper/221:54:052
134491440,9ptp4l0-21swapper/221:18:142
134491440,9ptp4l0-21swapper/200:33:132
134491440,5ptp4l0-21swapper/322:15:093
134491440,5ptp4l0-21swapper/219:30:262
134491440,4ptp4l14205-21apt-get22:55:113
134491440,4ptp4l0-21swapper/320:30:033
134491440,4ptp4l0-21swapper/300:18:523
700899437,9cyclictest33-21ksoftirqd/220:41:282
7008994337,3cyclictest33-21ksoftirqd/222:05:012
700899432,2cyclictest121rcu_preempt20:57:072
700899432,2cyclictest121rcu_preempt00:24:102
7008994310,4cyclictest33-21ksoftirqd/223:50:102
700799435,7cyclictest25-21ksoftirqd/122:59:481
700799432,5cyclictest25-21ksoftirqd/121:05:151
700799432,4cyclictest25-21ksoftirqd/122:14:111
700799431,6cyclictest25-21ksoftirqd/123:55:201
700799430,7cyclictest25-21ksoftirqd/100:15:021
134491430,4ptp4l31806-21ls23:30:270
134491430,4ptp4l0-21swapper/322:39:443
134491430,3ptp4l101ktimersoftd/021:25:200
7009994237,3cyclictest41-21ksoftirqd/321:00:193
700899429,6cyclictest33-21ksoftirqd/222:25:292
700899429,5cyclictest33-21ksoftirqd/221:33:192
700899426,2cyclictest0-21swapper/221:03:152
7008994237,3cyclictest33-21ksoftirqd/220:15:002
7008994236,3cyclictest33-21ksoftirqd/200:03:582
7008994210,4cyclictest33-21ksoftirqd/221:56:502
700799424,11cyclictest0-21swapper/121:28:371
700799421,6cyclictest25-21ksoftirqd/122:25:181
7006994224,10cyclictest9-21ksoftirqd/021:35:010
134491420,9ptp4l0-21swapper/223:31:362
134491420,9ptp4l0-21swapper/219:19:432
134491420,5ptp4l0-21swapper/219:09:592
134491420,5ptp4l0-21swapper/023:55:260
134491420,4ptp4l7636-21perl20:20:160
134491420,4ptp4l3265-21iostat_ios22:30:190
134491420,4ptp4l29647-21users21:05:300
134491420,4ptp4l21742-21iostat22:00:180
134491420,4ptp4l19249-21hddtemp_smartct23:05:170
134491420,4ptp4l19249-21hddtemp_smartct23:05:170
134491420,4ptp4l14892-21df_inode00:05:140
134491420,4ptp4l0-21swapper/323:45:423
134491420,4ptp4l0-21swapper/320:10:133
134491420,3ptp4l0-21swapper/319:50:303
134491420,3ptp4l0-21swapper/020:56:540
134491420,3ptp4l0-21swapper/019:20:010
700899419,6cyclictest33-21ksoftirqd/200:10:162
700899418,4cyclictest33-21ksoftirqd/221:37:362
700899416,3cyclictest33-21ksoftirqd/221:47:392
700899416,3cyclictest33-21ksoftirqd/221:47:392
7008994136,3cyclictest33-21ksoftirqd/220:34:542
7008994135,3cyclictest33-21ksoftirqd/223:15:012
700899413,2cyclictest121rcu_preempt19:10:072
700899410,2cyclictest121rcu_preempt20:53:192
134491410,5ptp4l28321-21diskstats19:55:140
134491410,5ptp4l0-21swapper/121:50:201
134491410,5ptp4l0-21swapper/021:10:160
134491410,5ptp4l0-21swapper/021:00:230
134491410,5ptp4l0-21swapper/020:36:320
134491410,4ptp4l9916-21df_inode22:45:150
134491410,4ptp4l4844-21apt-get21:25:122
134491410,4ptp4l3116-21iostat_ios21:20:190
134491410,4ptp4l24323-21irqstats22:05:210
134491410,4ptp4l22292-21ntp_states22:00:233
134491410,4ptp4l0-21swapper/321:28:153
134491410,4ptp4l0-21swapper/320:20:143
134491410,4ptp4l0-21swapper/223:05:282
134491410,4ptp4l0-21swapper/223:05:282
134491410,3ptp4l19771-21meminfo23:05:201
134491410,3ptp4l19771-21meminfo23:05:201
134491410,3ptp4l10929-21meminfo23:55:203
134491410,3ptp4l10081-21iostat_ios20:25:173
7008994035,3cyclictest33-21ksoftirqd/223:35:592
7008994035,3cyclictest33-21ksoftirqd/223:35:582
7008994035,3cyclictest33-21ksoftirqd/223:18:502
7008994035,3cyclictest33-21ksoftirqd/222:30:192
7008994010,4cyclictest33-21ksoftirqd/221:20:072
700799402,4cyclictest25-21ksoftirqd/119:54:311
7006994035,3cyclictest9-21ksoftirqd/022:15:190
7006994035,2cyclictest9-21ksoftirqd/022:00:010
134491400,5ptp4l5942-21memory22:35:220
134491400,5ptp4l0-21swapper/100:35:131
134491400,5ptp4l0-21swapper/000:25:220
134491400,4ptp4l17093-21iostat_ios23:00:190
134491400,4ptp4l12545-21iostat_ios21:40:190
134491400,4ptp4l10284-21memory19:15:210
134491400,4ptp4l0-21swapper/322:50:223
134491400,4ptp4l0-21swapper/321:10:293
134491400,4ptp4l0-21swapper/320:52:153
134491400,4ptp4l0-21swapper/320:40:103
134491400,4ptp4l0-21swapper/222:10:142
134491400,4ptp4l0-21swapper/219:45:512
134491400,4ptp4l0-21swapper/022:58:210
134491400,4ptp4l0-21swapper/020:06:070
134491400,4ptp4l0-21swapper/020:00:190
134491400,4ptp4l0-21swapper/019:52:310
134491400,3ptp4l14102-21apt-get20:35:123
134491400,3ptp4l1301-21snmpd22:25:023
134491400,3ptp4l0-21swapper/323:05:223
134491400,3ptp4l0-21swapper/323:05:223
7006993933,3cyclictest9-21ksoftirqd/021:50:190
134491390,5ptp4l19204-21awk20:45:153
134491390,5ptp4l0-21swapper/323:20:113
134491390,5ptp4l0-21swapper/320:15:093
134491390,5ptp4l0-21swapper/300:10:133
134491390,4ptp4l41-21ksoftirqd/319:15:233
134491390,4ptp4l30665-21sed22:20:133
134491390,4ptp4l2709-21apt-config23:40:000
134491390,4ptp4l0-21swapper/323:25:173
134491390,4ptp4l0-21swapper/323:10:223
134491390,4ptp4l0-21swapper/321:06:393
134491390,4ptp4l0-21swapper/319:40:263
134491390,4ptp4l0-21swapper/319:30:193
134491390,4ptp4l0-21swapper/319:10:153
134491390,4ptp4l0-21swapper/300:24:123
134491390,4ptp4l0-21swapper/220:20:032
134491390,4ptp4l0-21swapper/120:54:001
134491390,4ptp4l0-21swapper/023:24:090
134491390,4ptp4l0-21swapper/022:40:450
134491390,4ptp4l0-21swapper/020:12:050
134491390,4ptp4l0-21swapper/019:48:310
134491390,4ptp4l0-21swapper/019:25:140
134491390,4ptp4l0-21swapper/019:25:140
134491390,3ptp4l26396-21iostat22:10:200
134491390,3ptp4l12109-21df_inode20:30:160
134491390,3ptp4l0-21swapper/022:25:170
134491390,3ptp4l0-21swapper/020:50:280
134491390,10ptp4l0-21swapper/000:12:340
134491380,5ptp4l0-21swapper/019:14:570
134491380,4ptp4l16510-21cpuspeed19:30:130
134491380,4ptp4l1301-21snmpd22:40:063
134491380,4ptp4l0-21swapper/323:50:223
134491380,4ptp4l0-21swapper/323:44:093
134491380,4ptp4l0-21swapper/322:13:503
134491380,4ptp4l0-21swapper/322:06:563
134491380,4ptp4l0-21swapper/321:56:263
134491380,4ptp4l0-21swapper/321:41:383
134491380,4ptp4l0-21swapper/321:40:003
134491380,4ptp4l0-21swapper/321:30:173
134491380,4ptp4l0-21swapper/320:55:233
134491380,4ptp4l0-21swapper/300:31:333
134491380,4ptp4l0-21swapper/300:06:283
134491380,4ptp4l0-21swapper/023:50:170
134491380,4ptp4l0-21swapper/020:25:470
134491380,4ptp4l0-21swapper/000:20:130
134491380,3ptp4l9958-21df_inode21:35:150
134491380,3ptp4l31503-21ntp_states23:30:233
134491380,3ptp4l0-21swapper/323:37:313
134491380,3ptp4l0-21swapper/323:37:303
134491380,3ptp4l0-21swapper/319:35:033
134491380,3ptp4l0-21swapper/021:15:040
134491370,4ptp4l0-21swapper/323:00:563
134491370,4ptp4l0-21swapper/300:28:063
134491370,3ptp4l0-21swapper/321:20:133
134491360,4ptp4l0-21swapper/319:10:003
134491360,3ptp4l0-21swapper/321:53:093
134491360,3ptp4l0-21swapper/321:46:253
134491360,3ptp4l0-21swapper/321:46:253
134491360,3ptp4l0-21swapper/321:15:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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