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2026-04-09 - 15:07
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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 Thu Apr 09, 2026 00:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1095821420,6sleep11006599cyclictest20:20:161
215622790,5sleep30-21swapper/321:50:243
134491650,5ptp4l0-21swapper/020:50:250
134491630,4ptp4l31631-21iostat19:55:170
134491620,3ptp4l25-21ksoftirqd/119:09:331
134491600,4ptp4l0-21swapper/121:25:261
134491590,17ptp4l0-21swapper/019:05:260
134491580,4ptp4l0-21swapper/322:50:163
134491580,12ptp4l0-21swapper/222:00:232
134491570,5ptp4l0-21swapper/321:15:133
134491570,4ptp4l0-21swapper/123:05:221
134491570,3ptp4l0-21swapper/322:38:533
134491570,3ptp4l0-21swapper/319:41:053
134491570,3ptp4l0-21swapper/123:43:341
134491560,4ptp4l0-21swapper/323:35:243
134491560,4ptp4l0-21swapper/122:30:221
134491560,3ptp4l0-21swapper/323:25:273
134491550,4ptp4l0-21swapper/321:47:123
134491550,4ptp4l0-21swapper/320:41:023
134491550,3ptp4l0-21swapper/200:30:162
134491550,3ptp4l0-21swapper/100:39:571
134491550,3ptp4l0-21swapper/100:05:171
134491540,4ptp4l0-21swapper/320:47:493
134491540,3ptp4l0-21swapper/021:05:450
134491530,4ptp4l0-21swapper/221:51:122
134491530,4ptp4l0-21swapper/021:53:580
10066995320,5cyclictest33-21ksoftirqd/220:40:002
10066995314,8cyclictest33-21ksoftirqd/221:30:172
134491520,4ptp4l0-21swapper/323:40:373
134491520,4ptp4l0-21swapper/323:08:343
134491520,4ptp4l0-21swapper/320:12:523
134491520,4ptp4l0-21swapper/000:18:470
134491520,3ptp4l747-21hddtemp_smartct00:35:160
134491520,3ptp4l0-21swapper/320:55:403
134491520,3ptp4l0-21swapper/320:55:403
134491520,3ptp4l0-21swapper/319:37:463
134491520,3ptp4l0-21swapper/022:08:460
1006599521,3cyclictest12084-21diskstats23:50:131
134491510,4ptp4l0-21swapper/000:04:400
134491510,3ptp4l0-21swapper/320:04:553
134491510,3ptp4l0-21swapper/022:58:080
134491500,5ptp4l41-21ksoftirqd/321:35:153
134491500,4ptp4l0-21swapper/319:12:143
134491500,3ptp4l0-21swapper/300:19:273
134491500,3ptp4l0-21swapper/100:32:491
132862500,4sleep00-21swapper/021:35:000
10066995018,6cyclictest33-21ksoftirqd/220:55:002
134491490,9ptp4l231rcuc/123:15:101
134491490,4ptp4l0-21swapper/323:17:533
134491490,3ptp4l0-21swapper/300:08:303
134491490,3ptp4l0-21swapper/220:26:182
134491490,2ptp4l212-21systemd-journal22:29:323
10066994918,4cyclictest33-21ksoftirqd/220:10:572
10066994916,5cyclictest33-21ksoftirqd/200:05:232
299572480,5sleep229491-21/usr/sbin/munin22:10:172
134491480,4ptp4l0-21swapper/019:43:590
134491480,4ptp4l0-21swapper/019:30:530
134491480,3ptp4l0-21swapper/123:12:471
134491480,12ptp4l4995-21fschecks_count23:35:152
10066994821,7cyclictest33-21ksoftirqd/221:10:262
10066994819,3cyclictest33-21ksoftirqd/220:20:002
10066994817,5cyclictest33-21ksoftirqd/221:00:262
134491470,4ptp4l0-21swapper/319:33:153
134491470,3ptp4l0-21swapper/320:50:593
134491470,3ptp4l0-21swapper/020:06:040
1006699473,3cyclictest121rcu_preempt23:43:592
1006699472,2cyclictest121rcu_preempt22:09:592
1006699472,2cyclictest121rcu_preempt00:27:592
10066994718,3cyclictest33-21ksoftirqd/223:26:292
10066994716,4cyclictest33-21ksoftirqd/223:22:562
10066994716,4cyclictest33-21ksoftirqd/221:47:252
10066994713,6cyclictest33-21ksoftirqd/219:25:222
134491460,6ptp4l0-21swapper/122:15:251
134491460,5ptp4l4505-21apt-get22:25:152
134491460,4ptp4l0-21swapper/221:55:122
134491460,4ptp4l0-21swapper/121:00:381
134491460,4ptp4l0-21swapper/023:14:450
134491460,4ptp4l0-21swapper/022:51:270
134491460,3ptp4l0-21swapper/322:22:563
134491460,3ptp4l0-21swapper/119:58:561
134491460,3ptp4l0-21swapper/023:36:170
1006699463,2cyclictest121rcu_preempt23:19:582
1006699462,2cyclictest121rcu_preempt21:19:592
1006699462,2cyclictest121rcu_preempt21:09:592
10066994620,5cyclictest33-21ksoftirqd/220:05:562
10066994614,6cyclictest33-21ksoftirqd/220:55:242
10066994614,6cyclictest33-21ksoftirqd/220:55:242
10066994613,5cyclictest33-21ksoftirqd/220:00:172
134691450,12getstats11368-21latency20:20:182
134491450,4ptp4l27264-21apt-get20:55:121
134491450,4ptp4l27264-21apt-get20:55:111
134491450,4ptp4l0-21swapper/319:20:073
134491450,4ptp4l0-21swapper/122:24:471
134491450,4ptp4l0-21swapper/121:56:281
134491450,4ptp4l0-21swapper/121:24:551
134491450,4ptp4l0-21swapper/022:35:150
134491450,3ptp4l0-21swapper/323:49:383
134491450,3ptp4l0-21swapper/323:12:233
134491450,3ptp4l0-21swapper/321:09:103
134491450,3ptp4l0-21swapper/121:09:451
134491450,3ptp4l0-21swapper/119:43:431
134491450,12ptp4l9-21ksoftirqd/020:19:450
10066994534,9cyclictest33-21ksoftirqd/220:40:242
1006699453,2cyclictest121rcu_preempt23:45:592
1006699453,2cyclictest121rcu_preempt21:43:592
1006699452,2cyclictest121rcu_preempt19:24:592
1006699452,2cyclictest121rcu_preempt00:15:092
10066994516,5cyclictest33-21ksoftirqd/200:38:392
10066994515,5cyclictest33-21ksoftirqd/220:45:252
10066994515,4cyclictest33-21ksoftirqd/219:50:562
10066994514,3cyclictest33-21ksoftirqd/223:09:522
10066994513,4cyclictest33-21ksoftirqd/221:35:182
1006699451,2cyclictest33-21ksoftirqd/223:55:152
10066994512,6cyclictest33-21ksoftirqd/222:15:212
134491440,5ptp4l29736-21ls00:25:273
134491440,4ptp4l0-21swapper/219:17:182
134491440,4ptp4l0-21swapper/121:14:431
134491440,3ptp4l0-21swapper/123:30:571
134491440,3ptp4l0-21swapper/119:52:181
134491440,10ptp4l0-21swapper/222:32:362
134491440,10ptp4l0-21swapper/221:20:192
1006699442,3cyclictest121rcu_preempt20:35:012
10066994415,4cyclictest33-21ksoftirqd/222:46:332
10066994415,4cyclictest33-21ksoftirqd/200:11:492
10066994414,4cyclictest33-21ksoftirqd/222:55:002
1006699441,2cyclictest121rcu_preempt21:29:582
10066994410,4cyclictest33-21ksoftirqd/222:25:002
134491430,9ptp4l0-21swapper/022:11:550
134491430,6ptp4l23718-21ntp_states21:55:243
134491430,5ptp4l31804-21python00:30:260
134491430,4ptp4l32584-21iostat_ios22:15:180
134491430,4ptp4l28169-21apt-get00:25:121
134491430,4ptp4l23151-21ls19:35:270
134491430,4ptp4l0-21swapper/322:04:233
134491430,4ptp4l0-21swapper/321:40:343
134491430,4ptp4l0-21swapper/122:05:181
134491430,4ptp4l0-21swapper/023:53:020
134491430,3ptp4l0-21swapper/123:58:141
134491430,10ptp4l0-21swapper/321:11:593
10066994338,3cyclictest12102-21taskset23:50:152
10066994312,3cyclictest33-21ksoftirqd/223:15:002
134491420,9ptp4l0-21swapper/223:31:212
134491420,5ptp4l0-21swapper/022:00:120
134491420,4ptp4l1989-21df21:10:130
134491420,4ptp4l19315-21iostat_ios00:05:170
134491420,4ptp4l16284-21meminfo20:30:190
134491420,4ptp4l15848-21iostat20:30:173
134491420,4ptp4l0-21swapper/319:25:333
134491420,4ptp4l0-21swapper/123:45:521
134491420,4ptp4l0-21swapper/023:32:570
134491420,3ptp4l0-21swapper/122:04:031
134491420,3ptp4l0-21swapper/021:56:090
134491420,11ptp4l0-21swapper/021:02:190
134491420,10ptp4l0-21swapper/020:29:330
10066994236,4cyclictest33-21ksoftirqd/222:40:182
10066994214,3cyclictest33-21ksoftirqd/219:40:172
10066994211,4cyclictest33-21ksoftirqd/219:47:472
134491410,6ptp4l16265-21date00:00:000
134491410,5ptp4l0-21swapper/121:15:291
134491410,4ptp4l7566-21ntp_states21:20:233
134491410,4ptp4l4946-21df_inode23:35:141
134491410,4ptp4l31566-21apt-get22:15:013
134491410,4ptp4l20989-21diskstats23:00:160
134491410,4ptp4l19355-21apt-get19:30:111
134491410,4ptp4l14006-21ls20:25:221
134491410,4ptp4l12698-21diskstats19:15:140
134491410,4ptp4l0-21swapper/323:34:363
134491410,4ptp4l0-21swapper/323:20:223
134491410,4ptp4l0-21swapper/322:06:003
134491410,4ptp4l0-21swapper/319:55:263
134491410,4ptp4l0-21swapper/019:45:280
134491410,3ptp4l6447-21apt-get21:20:120
134491410,3ptp4l16448-21apt-get00:00:111
134491410,3ptp4l0-21swapper/020:23:380
134491410,2ptp4l14073-21apt-get23:55:113
10066994115,5cyclictest33-21ksoftirqd/200:01:202
1006699411,2cyclictest121rcu_preempt19:30:172
134491400,5ptp4l9960-21ps21:25:240
134491400,5ptp4l4241-21ls21:15:140
134491400,5ptp4l0-21swapper/320:25:033
134491400,5ptp4l0-21swapper/122:25:221
134491400,5ptp4l0-21swapper/020:55:190
134491400,5ptp4l0-21swapper/020:55:190
134491400,4ptp4l8475-21users22:30:290
134491400,4ptp4l5625-21ntp_states22:25:250
134491400,4ptp4l31442-21python23:20:250
134491400,4ptp4l26612-21fschecks_count19:45:153
134491400,4ptp4l0-21swapper/320:35:263
134491400,4ptp4l0-21swapper/319:15:163
134491400,4ptp4l0-21swapper/200:20:252
134491400,4ptp4l0-21swapper/122:55:351
134491400,4ptp4l0-21swapper/122:53:591
134491400,4ptp4l0-21swapper/121:45:251
134491400,4ptp4l0-21swapper/119:20:211
134491400,4ptp4l0-21swapper/023:16:370
134491400,4ptp4l0-21swapper/020:40:190
134491400,4ptp4l0-21swapper/019:27:370
134491400,3ptp4l6962-21apt-get23:40:100
134491400,3ptp4l4289-21meminfo20:05:203
134491400,3ptp4l3341-21apt-get20:05:121
134491400,3ptp4l13197-21ls23:50:243
134491400,3ptp4l0-21swapper/023:46:540
10066994035,3cyclictest33-21ksoftirqd/220:00:002
10064994034,4cyclictest9-21ksoftirqd/000:21:050
134491390,5ptp4l0-21swapper/120:35:211
134491390,5ptp4l0-21swapper/119:35:281
134491390,5ptp4l0-21swapper/022:40:290
134491390,5ptp4l0-21swapper/020:00:110
134491390,4ptp4l32040-21grep00:30:273
134491390,4ptp4l13892-21/usr/sbin/munin19:15:251
134491390,4ptp4l1006799cyclictest21:30:103
134491390,4ptp4l0-21swapper/323:02:593
134491390,4ptp4l0-21swapper/322:55:033
134491390,4ptp4l0-21swapper/322:40:173
134491390,4ptp4l0-21swapper/322:11:303
134491390,4ptp4l0-21swapper/321:25:133
134491390,4ptp4l0-21swapper/320:20:023
134491390,4ptp4l0-21swapper/300:39:253
134491390,4ptp4l0-21swapper/300:11:323
134491390,4ptp4l0-21swapper/300:00:203
134491390,4ptp4l0-21swapper/222:35:552
134491390,4ptp4l0-21swapper/123:20:281
134491390,4ptp4l0-21swapper/122:45:211
134491390,4ptp4l0-21swapper/122:35:171
134491390,4ptp4l0-21swapper/121:33:331
134491390,4ptp4l0-21swapper/120:50:141
134491390,4ptp4l0-21swapper/120:45:271
134491390,4ptp4l0-21swapper/120:11:581
134491390,4ptp4l0-21swapper/119:13:011
134491390,4ptp4l0-21swapper/100:18:251
134491390,4ptp4l0-21swapper/100:10:171
134491390,4ptp4l0-21swapper/023:26:400
134491390,4ptp4l0-21swapper/022:21:350
134491390,4ptp4l0-21swapper/021:35:200
134491390,4ptp4l0-21swapper/020:45:190
134491390,4ptp4l0-21swapper/020:37:120
134491390,4ptp4l0-21swapper/019:52:030
134491390,4ptp4l0-21swapper/019:20:100
134491390,4ptp4l0-21swapper/019:10:150
134491390,4ptp4l0-21swapper/000:10:150
134491390,3ptp4l29882-21ntp_states19:50:213
134491390,3ptp4l21859-21df19:35:142
134491390,3ptp4l16829-21ntp_states21:40:221
134491390,3ptp4l13934-21df22:45:200
134491390,3ptp4l0-21swapper/021:45:030
10066993935,2cyclictest33-21ksoftirqd/219:11:462
10066993933,3cyclictest33-21ksoftirqd/222:55:332
10066993911,4cyclictest33-21ksoftirqd/223:00:282
134491380,4ptp4l0-21swapper/322:46:493
134491380,4ptp4l0-21swapper/321:00:493
134491380,4ptp4l0-21swapper/320:15:553
134491380,4ptp4l0-21swapper/300:22:283
134491380,4ptp4l0-21swapper/123:04:351
134491380,4ptp4l0-21swapper/122:11:311
134491380,4ptp4l0-21swapper/121:35:211
134491380,4ptp4l0-21swapper/120:40:541
134491380,4ptp4l0-21swapper/120:30:191
134491380,4ptp4l0-21swapper/120:15:271
134491380,4ptp4l0-21swapper/120:00:141
134491380,4ptp4l0-21swapper/119:47:151
134491380,4ptp4l0-21swapper/119:25:241
134491380,4ptp4l0-21swapper/100:20:171
134491380,4ptp4l0-21swapper/023:05:020
134491380,4ptp4l0-21swapper/021:40:250
134491380,4ptp4l0-21swapper/020:12:130
134491380,4ptp4l0-21swapper/000:25:220
134491380,3ptp4l0-21swapper/322:30:163
1006599380,3cyclictest11531-21chrt22:40:131
1006599380,3cyclictest1132-21/usr/sbin/munin23:25:231
134491370,4ptp4l0-21swapper/121:50:171
137891225,10phc2sys0-21swapper/319:05:113
137891182,9phc2sys9800-21ls19:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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