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2026-05-04 - 05:44
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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 Mon May 04, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
123162820,6sleep01870699cyclictest22:20:260
1870899742,30cyclictest0-21swapper/221:55:262
18708996833,6cyclictest33-21ksoftirqd/221:50:012
138202680,6sleep1241ktimersoftd/121:15:251
134491670,18ptp4l6287-21seq00:26:591
18708996430,4cyclictest33-21ksoftirqd/200:15:152
194282620,4sleep00-21swapper/020:20:140
134491610,4ptp4l0-21swapper/319:35:313
18708995929,3cyclictest33-21ksoftirqd/222:20:112
134491590,4ptp4l0-21swapper/022:45:140
134491580,4ptp4l0-21swapper/321:32:123
134491570,3ptp4l0-21swapper/019:55:240
134491570,3ptp4l0-21swapper/000:20:120
134491560,6ptp4l0-21swapper/119:05:571
134491560,5ptp4l0-21swapper/019:05:480
134491560,3ptp4l24881-21memory20:30:210
134491560,3ptp4l0-21swapper/221:07:202
1870899555,8cyclictest33-21ksoftirqd/219:45:012
134491550,3ptp4l0-21swapper/320:06:323
134491550,3ptp4l0-21swapper/200:10:032
1870899545,6cyclictest33-21ksoftirqd/222:55:002
1870899544,6cyclictest0-21swapper/220:45:242
1870899544,5cyclictest33-21ksoftirqd/221:54:592
1870899544,13cyclictest0-21swapper/220:05:132
1870899541,7cyclictest33-21ksoftirqd/220:15:242
134491540,5ptp4l0-21swapper/022:29:520
134491540,4ptp4l0-21swapper/023:05:120
134491540,4ptp4l0-21swapper/023:05:120
134491540,4ptp4l0-21swapper/019:30:260
1870899535,8cyclictest33-21ksoftirqd/219:30:162
1870899535,4cyclictest33-21ksoftirqd/220:00:162
1870899534,8cyclictest33-21ksoftirqd/200:30:262
1870899530,9cyclictest321ktimersoftd/219:20:002
1870899530,9cyclictest321ktimersoftd/219:20:002
134491530,4ptp4l0-21swapper/000:29:200
1870899524,5cyclictest33-21ksoftirqd/223:55:272
1870899523,6cyclictest0-21swapper/220:20:252
1870899523,5cyclictest17301-21latency_hist22:35:002
1870899522,7cyclictest0-21swapper/219:55:132
1870799523,2cyclictest31614-21kworker/1:119:15:291
1870799523,2cyclictest31614-21kworker/1:119:15:291
134491520,4ptp4l0-21swapper/319:42:063
134491520,11ptp4l0-21swapper/020:18:420
1870899514,8cyclictest33-21ksoftirqd/221:20:012
1870899513,8cyclictest33-21ksoftirqd/200:25:232
1870899513,5cyclictest33-21ksoftirqd/221:35:282
1870899511,6cyclictest0-21swapper/219:50:162
1870899510,7cyclictest33-21ksoftirqd/222:10:172
1870899510,7cyclictest321ktimersoftd/221:20:142
134491510,4ptp4l0-21swapper/323:56:073
134491510,4ptp4l0-21swapper/322:09:353
134491510,13ptp4l0-21swapper/023:03:400
1870899505,5cyclictest33-21ksoftirqd/222:00:202
1870899503,7cyclictest0-21swapper/220:25:142
1870899502,29cyclictest0-21swapper/223:25:242
1870899500,7cyclictest33-21ksoftirqd/221:00:162
151462500,4sleep30-21swapper/323:40:003
151462500,4sleep30-21swapper/323:40:003
134491500,12ptp4l0-21swapper/023:55:260
1870899496,4cyclictest23393-21processes22:45:252
1870899494,5cyclictest33-21ksoftirqd/220:10:242
1870899492,7cyclictest33-21ksoftirqd/221:40:162
1870899491,7cyclictest0-21swapper/223:38:542
1870899491,7cyclictest0-21swapper/223:38:542
1870899491,6cyclictest33-21ksoftirqd/222:40:172
1870899491,5cyclictest33-21ksoftirqd/220:35:282
1870899490,6cyclictest33-21ksoftirqd/221:25:212
1870899490,6cyclictest33-21ksoftirqd/200:00:182
1870899490,5cyclictest33-21ksoftirqd/223:20:212
134491490,4ptp4l0-21swapper/023:25:000
134491490,4ptp4l0-21swapper/023:24:250
134491490,4ptp4l0-21swapper/019:49:570
134491490,3ptp4l0-21swapper/320:04:023
134491490,3ptp4l0-21swapper/023:46:130
1870899485,9cyclictest33-21ksoftirqd/222:25:232
1870899485,8cyclictest33-21ksoftirqd/220:55:152
1870899483,6cyclictest33-21ksoftirqd/222:55:102
1870899482,7cyclictest0-21swapper/222:15:272
1870899482,6cyclictest33-21ksoftirqd/221:10:142
1870899482,6cyclictest0-21swapper/219:20:142
1870899482,10cyclictest0-21swapper/223:40:432
1870899480,6cyclictest33-21ksoftirqd/223:30:242
1870899480,6cyclictest33-21ksoftirqd/219:14:492
1870899480,6cyclictest33-21ksoftirqd/219:14:492
1870899480,5cyclictest33-21ksoftirqd/223:05:182
1870899480,5cyclictest33-21ksoftirqd/223:05:182
134491480,4ptp4l0-21swapper/023:15:260
134491480,4ptp4l0-21swapper/021:21:580
134491480,4ptp4l0-21swapper/000:03:180
1870899473,7cyclictest33-21ksoftirqd/219:25:142
18708994716,5cyclictest33-21ksoftirqd/200:20:142
1870899470,7cyclictest33-21ksoftirqd/200:05:062
1870899470,6cyclictest33-21ksoftirqd/221:30:172
134491470,4ptp4l0-21swapper/321:24:353
134491470,4ptp4l0-21swapper/020:12:560
134491470,4ptp4l0-21swapper/000:39:360
134491470,3ptp4l0-21swapper/323:27:243
134491470,3ptp4l0-21swapper/300:26:403
134491470,3ptp4l0-21swapper/122:04:561
1870899464,5cyclictest33-21ksoftirqd/222:05:142
1870899462,33cyclictest0-21swapper/223:50:182
1870899460,6cyclictest321ktimersoftd/219:35:292
1870899460,5cyclictest33-21ksoftirqd/220:50:122
134491460,3ptp4l0-21swapper/319:10:553
134491460,3ptp4l0-21swapper/319:10:553
1870899455,5cyclictest33-21ksoftirqd/219:45:192
1870899454,7cyclictest33-21ksoftirqd/222:35:152
1870899454,7cyclictest33-21ksoftirqd/222:35:152
1870799452,42cyclictest0-21swapper/120:40:471
18707994516,27cyclictest31614-21kworker/1:120:55:491
134491450,9ptp4l0-21swapper/021:59:550
134491450,3ptp4l0-21swapper/000:12:540
1870899443,6cyclictest33-21ksoftirqd/223:45:212
1870899443,5cyclictest33-21ksoftirqd/223:10:212
1870899441,5cyclictest33-21ksoftirqd/200:35:282
134491440,7ptp4l4845-21phc2sys23:15:252
134491440,4ptp4l0-21swapper/019:25:120
134491440,3ptp4l28543-21apt-get20:40:122
134491440,3ptp4l0-21swapper/300:09:033
134491440,3ptp4l0-21swapper/121:52:331
134491440,3ptp4l0-21swapper/121:28:101
134491440,3ptp4l0-21swapper/023:37:400
134491440,3ptp4l0-21swapper/023:37:400
18709994312,4cyclictest41-21ksoftirqd/320:35:193
1870899433,3cyclictest33-21ksoftirqd/220:30:222
134491430,4ptp4l31033-21ntp_states00:10:243
134491430,4ptp4l24462-21apt-get22:50:121
134491430,4ptp4l1870799cyclictest22:27:141
134491430,3ptp4l0-21swapper/123:42:481
134491430,3ptp4l0-21swapper/119:34:201
134491430,3ptp4l0-21swapper/021:50:240
18709994237,3cyclictest41-21ksoftirqd/321:20:013
1870799421,11cyclictest134491ptp4l23:10:121
134491420,5ptp4l13519-21memory21:15:200
134491420,5ptp4l0-21swapper/323:15:123
134491420,5ptp4l0-21swapper/321:45:123
134491420,5ptp4l0-21swapper/122:20:101
134491420,4ptp4l7595-21/usr/sbin/munin19:55:121
134491420,4ptp4l2562-21ntp_states22:00:220
134491420,4ptp4l2318-21gnome-shell23:42:580
134491420,4ptp4l18669-21ntp_states22:35:250
134491420,4ptp4l18669-21ntp_states22:35:240
134491420,4ptp4l1310-21apt-get23:10:110
134491420,4ptp4l0-21swapper/122:58:231
134491420,3ptp4l29120-21apt-get21:50:123
134491420,3ptp4l22166-21apt-get22:45:123
134491420,3ptp4l20989-21ntp_states22:40:241
134491420,3ptp4l20232-21apt-get23:50:131
18709994137,2cyclictest41-21ksoftirqd/320:30:003
18709994136,3cyclictest41-21ksoftirqd/300:20:003
134491410,5ptp4l0-21swapper/123:25:201
134491410,5ptp4l0-21swapper/120:50:211
134491410,5ptp4l0-21swapper/120:45:201
134491410,5ptp4l0-21swapper/120:25:151
134491410,4ptp4l6343-21df_inode22:10:151
134491410,4ptp4l30675-21apt-get19:35:121
134491410,4ptp4l28755-21df20:40:140
134491410,4ptp4l27974-21iostat_ios00:05:181
134491410,4ptp4l23565-21apt-get19:20:111
134491410,4ptp4l21342-21diskstats19:15:140
134491410,4ptp4l21342-21diskstats19:15:140
134491410,4ptp4l20818-21meminfo22:40:210
134491410,4ptp4l17964-21iostat21:25:170
134491410,4ptp4l10476-21iostat_ios20:00:180
134491410,4ptp4l0-21swapper/223:03:502
134491410,4ptp4l0-21swapper/123:55:141
134491410,4ptp4l0-21swapper/123:45:181
134491410,4ptp4l0-21swapper/021:30:130
134491410,4ptp4l0-21swapper/019:12:070
134491410,4ptp4l0-21swapper/019:12:070
134491410,3ptp4l14046-21ls23:35:201
134491410,3ptp4l14046-21ls23:35:201
134491410,3ptp4l0-21swapper/121:45:151
134491410,2ptp4l41-21ksoftirqd/320:20:373
134491410,2ptp4l101ktimersoftd/000:15:200
18709994036,2cyclictest41-21ksoftirqd/319:20:013
18709994036,2cyclictest41-21ksoftirqd/319:20:013
18709994035,3cyclictest41-21ksoftirqd/322:35:003
18709994035,3cyclictest41-21ksoftirqd/319:30:003
18709994035,3cyclictest41-21ksoftirqd/300:05:003
18709994034,4cyclictest41-21ksoftirqd/300:30:193
134491400,5ptp4l32486-21df_abs00:15:141
134491400,5ptp4l24266-21cron21:40:000
134491400,5ptp4l1301-21snmpd22:55:330
134491400,5ptp4l0-21swapper/100:11:061
134491400,5ptp4l0-21swapper/021:45:150
134491400,4ptp4l831-21/usr/sbin/munin19:40:150
134491400,4ptp4l7733-21meminfo00:30:211
134491400,4ptp4l4694-21meminfo22:05:200
134491400,4ptp4l11727-21users21:10:291
134491400,4ptp4l0-21swapper/323:30:213
134491400,4ptp4l0-21swapper/323:00:233
134491400,4ptp4l0-21swapper/322:52:423
134491400,4ptp4l0-21swapper/322:28:303
134491400,4ptp4l0-21swapper/322:15:263
134491400,4ptp4l0-21swapper/322:05:013
134491400,4ptp4l0-21swapper/300:35:123
134491400,4ptp4l0-21swapper/123:20:151
134491400,4ptp4l0-21swapper/122:30:231
134491400,4ptp4l0-21swapper/121:40:271
134491400,4ptp4l0-21swapper/121:30:141
134491400,4ptp4l0-21swapper/121:20:181
134491400,4ptp4l0-21swapper/022:32:450
134491400,4ptp4l0-21swapper/022:15:250
134491400,4ptp4l0-21swapper/021:40:090
134491400,4ptp4l0-21swapper/020:39:520
134491400,3ptp4l6042-21apt-get22:10:110
134491400,3ptp4l24528-21apt-get21:40:123
134491400,3ptp4l21183-21meminfo23:50:200
134491400,3ptp4l16797-21apt-get20:15:131
134491400,3ptp4l0-21swapper/122:17:261
1870799390,3cyclictest31614-21kworker/1:120:09:081
134491390,5ptp4l17757-21df22:35:141
134491390,5ptp4l17757-21df22:35:141
134491390,5ptp4l0-21swapper/320:18:113
134491390,5ptp4l0-21swapper/119:50:111
134491390,4ptp4l18314-21irqrtprio22:35:193
134491390,4ptp4l18314-21irqrtprio22:35:193
134491390,4ptp4l0-21swapper/323:51:003
134491390,4ptp4l0-21swapper/321:39:463
134491390,4ptp4l0-21swapper/123:32:381
134491390,4ptp4l0-21swapper/123:17:271
134491390,4ptp4l0-21swapper/123:05:101
134491390,4ptp4l0-21swapper/123:05:101
134491390,4ptp4l0-21swapper/122:48:581
134491390,4ptp4l0-21swapper/122:05:171
134491390,4ptp4l0-21swapper/121:02:201
134491390,4ptp4l0-21swapper/120:10:171
134491390,4ptp4l0-21swapper/119:45:141
134491390,4ptp4l0-21swapper/119:10:171
134491390,4ptp4l0-21swapper/119:10:171
134491390,4ptp4l0-21swapper/100:35:281
134491390,4ptp4l0-21swapper/100:02:251
134491390,4ptp4l0-21swapper/023:30:120
134491390,4ptp4l0-21swapper/022:51:440
134491390,4ptp4l0-21swapper/021:05:210
134491390,4ptp4l0-21swapper/021:01:450
134491390,4ptp4l0-21swapper/020:55:240
134491390,4ptp4l0-21swapper/020:27:260
134491390,4ptp4l0-21swapper/020:06:420
134491390,4ptp4l0-21swapper/019:36:390
134491390,4ptp4l0-21swapper/000:30:260
134491390,4ptp4l0-21swapper/000:05:280
134491390,3ptp4l6242-21meminfo19:50:200
134491390,3ptp4l4265-21ntp_states20:55:223
134491390,3ptp4l2619-21hddtemp_smartct00:20:161
134491390,3ptp4l1301-21snmpd22:55:373
134491390,3ptp4l1144-21hddtemp_smartct20:50:160
134491390,3ptp4l0-21swapper/322:44:443
1870999380,2cyclictest0-21swapper/320:10:203
134491380,4ptp4l0-21swapper/323:21:023
134491380,4ptp4l0-21swapper/323:10:363
134491380,4ptp4l0-21swapper/322:11:023
134491380,4ptp4l0-21swapper/321:26:103
134491380,4ptp4l0-21swapper/320:34:343
134491380,4ptp4l0-21swapper/319:55:143
134491380,4ptp4l0-21swapper/319:48:573
134491380,4ptp4l0-21swapper/319:21:043
134491380,4ptp4l0-21swapper/121:37:001
134491380,4ptp4l0-21swapper/120:30:201
134491380,4ptp4l0-21swapper/119:41:361
134491380,4ptp4l0-21swapper/119:26:521
134491380,3ptp4l31988-21iostat_ios21:55:181
134491380,3ptp4l0-21swapper/322:20:143
134491380,3ptp4l0-21swapper/321:55:223
134491380,3ptp4l0-21swapper/019:20:220
18709993732,3cyclictest41-21ksoftirqd/323:45:013
134491370,5ptp4l0-21swapper/120:35:191
134491370,4ptp4l0-21swapper/321:00:183
134491370,4ptp4l0-21swapper/319:51:143
134491370,4ptp4l0-21swapper/319:30:363
134491370,4ptp4l0-21swapper/021:10:270
134491370,3ptp4l0-21swapper/321:09:173
134491370,3ptp4l0-21swapper/123:02:101
134491370,3ptp4l0-21swapper/120:20:321
134491370,3ptp4l0-21swapper/020:48:270
46198360,4rtkit-daemon0-21swapper/300:23:523
18709993631,3cyclictest41-21ksoftirqd/320:50:133
134491360,4ptp4l0-21swapper/120:02:211
134491360,3ptp4l9471-21taskset21:05:501
134491360,3ptp4l0-21swapper/323:09:583
134491360,3ptp4l0-21swapper/323:09:583
134491350,3ptp4l0-21swapper/323:47:263
46198340,4rtkit-daemon0-21swapper/320:49:593
18709993328,3cyclictest41-21ksoftirqd/321:10:193
18709993328,3cyclictest41-21ksoftirqd/320:40:173
46198200,8rtkit-daemon0-21swapper/219:09:182
160682143,6sleep30-21swapper/319:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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