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2026-04-13 - 13:55
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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 highest latencies:
System rackdslot1.osadl.org (updated Mon Apr 13, 2026 00:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1626321660,7sleep0909899cyclictest20:35:160
910199646,16cyclictest2117-21grep20:05:123
134491640,6ptp4l0-21swapper/019:05:190
910199604,15cyclictest16128-21/usr/sbin/munin21:45:153
910199604,11cyclictest13581-21latency_hist21:40:003
910199604,11cyclictest13581-21latency_hist21:40:003
254522600,4sleep30-21swapper/319:45:163
134491600,4ptp4l0-21swapper/120:50:271
134491600,4ptp4l0-21swapper/120:50:271
134491570,4ptp4l0-21swapper/122:15:421
134491570,4ptp4l0-21swapper/121:15:171
134491570,3ptp4l0-21swapper/221:20:322
134491570,3ptp4l0-21swapper/121:05:271
152582560,4sleep00-21swapper/022:50:260
152582560,4sleep00-21swapper/022:50:260
134491560,9ptp4l0-21swapper/221:18:212
134491560,5ptp4l0-21swapper/119:08:461
134491560,4ptp4l0-21swapper/122:37:101
134491560,4ptp4l0-21swapper/121:43:171
134491550,4ptp4l0-21swapper/123:38:481
134491550,4ptp4l0-21swapper/122:09:231
134491550,4ptp4l0-21swapper/120:16:491
134491550,3ptp4l0-21swapper/200:10:242
134491540,4ptp4l0-21swapper/220:31:212
134491540,4ptp4l0-21swapper/200:21:322
134491540,4ptp4l0-21swapper/123:57:351
134491540,4ptp4l0-21swapper/000:35:340
134491540,3ptp4l0-21swapper/022:55:210
134491540,11ptp4l6310-21apt-get19:05:022
910199524,9cyclictest0-21swapper/319:15:123
134491520,4ptp4l0-21swapper/121:45:431
134491520,4ptp4l0-21swapper/120:06:011
134491520,3ptp4l0-21swapper/022:30:140
134491520,12ptp4l33-21ksoftirqd/222:45:282
910199516,11cyclictest0-21swapper/322:51:083
910199516,11cyclictest0-21swapper/322:51:083
910099512,46cyclictest0-21swapper/219:35:192
134491510,9ptp4l0-21swapper/000:20:300
134491510,5ptp4l0-21swapper/219:17:542
134491510,5ptp4l0-21swapper/200:38:212
134491510,4ptp4l0-21swapper/219:20:272
134491510,4ptp4l0-21swapper/020:08:470
134491510,3ptp4l0-21swapper/220:08:342
134491510,3ptp4l0-21swapper/219:48:012
134491510,11ptp4l0-21swapper/221:52:452
134491500,5ptp4l0-21swapper/221:44:352
134491500,5ptp4l0-21swapper/123:05:101
134491500,4ptp4l0-21swapper/120:49:591
134491500,4ptp4l0-21swapper/023:42:360
910199497,7cyclictest17023-21iostat00:05:173
910199496,6cyclictest0-21swapper/319:42:183
134491490,4ptp4l0-21swapper/120:11:271
134491490,4ptp4l0-21swapper/100:27:561
134491490,3ptp4l0-21swapper/200:29:142
134491490,3ptp4l0-21swapper/022:28:220
134491490,12ptp4l0-21swapper/023:48:510
134491490,11ptp4l0-21swapper/319:05:133
910199487,6cyclictest0-21swapper/320:41:143
134491480,4ptp4l0-21swapper/120:23:471
134491480,4ptp4l0-21swapper/100:03:571
134491480,4ptp4l0-21swapper/020:00:530
134491480,3ptp4l0-21swapper/219:29:422
134491480,3ptp4l0-21swapper/119:15:131
910199476,7cyclictest30578-21apt-config00:35:003
910199476,11cyclictest0-21swapper/321:21:303
910199475,11cyclictest0-21swapper/319:24:443
910199473,6cyclictest134491ptp4l00:30:223
910199472,11cyclictest22133-21timerwakeupswit20:45:273
910199471,18cyclictest0-21swapper/320:15:163
134491470,5ptp4l33-21ksoftirqd/219:56:532
134491470,4ptp4l0-21swapper/222:12:532
134491470,4ptp4l0-21swapper/021:21:070
134491470,3ptp4l0-21swapper/221:47:272
134491470,3ptp4l0-21swapper/121:58:171
910199465,8cyclictest8127-21ntpq23:45:223
134491460,8ptp4l0-21swapper/023:50:030
910199456,5cyclictest0-21swapper/320:30:463
910199455,8cyclictest26582-21ls22:05:213
910199452,8cyclictest26755-21ps23:15:283
910199450,11cyclictest8163-21ntpq22:35:223
134491450,5ptp4l32474-21apt-get22:20:133
134491450,5ptp4l0-21swapper/023:10:200
134491450,4ptp4l27547-21apt-get19:50:131
134491450,4ptp4l12949-21ls21:35:270
134491450,4ptp4l12949-21ls21:35:270
134491450,3ptp4l0-21swapper/123:45:561
134491450,3ptp4l0-21swapper/120:30:191
134491450,11ptp4l0-21swapper/222:40:432
910199446,5cyclictest0-21swapper/320:00:273
910199446,14cyclictest30139-21/usr/sbin/munin22:15:273
134491440,9ptp4l0-21swapper/221:02:332
134491440,4ptp4l13745-21apt-get19:20:111
134491440,3ptp4l321ktimersoftd/222:09:102
134491440,3ptp4l0-21swapper/222:35:332
134491440,3ptp4l0-21swapper/122:49:321
910199435,11cyclictest0-21swapper/322:28:143
910099431,40cyclictest1488-21kworker/2:123:42:272
134491430,9ptp4l0-21swapper/119:37:521
134491430,9ptp4l0-21swapper/100:11:441
134491430,5ptp4l17255-21ps19:25:231
134491430,5ptp4l0-21swapper/321:30:123
134491430,5ptp4l0-21swapper/319:55:203
134491430,5ptp4l0-21swapper/122:00:191
134491430,4ptp4l27812-21apt-get23:20:120
134491430,4ptp4l27495-21apt-get21:00:121
134491430,4ptp4l27366-21ls00:25:283
134491430,4ptp4l16858-21iostat_ios22:55:171
134491430,4ptp4l11527-21apt-get21:35:132
134491430,4ptp4l11527-21apt-get21:35:132
134491430,4ptp4l0-21swapper/100:16:401
134491430,3ptp4l19545-21ls23:00:200
134491430,3ptp4l0-21swapper/100:07:381
134491430,2ptp4l0-21swapper/200:31:472
134491430,12ptp4l9-21ksoftirqd/020:30:050
134491430,12ptp4l9-21ksoftirqd/000:02:450
910199427,13cyclictest30680-21iostat_ios23:25:173
910199427,13cyclictest30680-21iostat_ios23:25:163
910199424,6cyclictest137891phc2sys20:50:203
910199424,6cyclictest137891phc2sys20:50:203
134491420,9ptp4l0-21swapper/220:04:072
134491420,6ptp4l0-21swapper/019:40:130
134491420,5ptp4l818-21meminfo21:10:191
134491420,5ptp4l7195-21df_abs21:25:143
134491420,4ptp4l28590-21hddtemp_smartct00:30:181
134491420,4ptp4l23569-21apt-get00:20:143
134491420,4ptp4l18288-21apt-get20:40:111
134491420,4ptp4l16042-21apt-get19:25:123
134491420,4ptp4l0-21swapper/220:20:192
134491420,4ptp4l0-21swapper/119:31:031
134491420,4ptp4l0-21swapper/119:31:031
134491420,4ptp4l0-21swapper/021:26:490
134491420,3ptp4l9131-21apt-get19:10:121
134491420,3ptp4l32301-21apt-get21:10:110
134491420,3ptp4l12325-21ls20:25:200
134491420,3ptp4l0-21swapper/121:33:221
134491420,2ptp4l0-21swapper/019:45:230
910199415,15cyclictest11683-21/usr/sbin/munin22:45:193
9100994113,27cyclictest0-21swapper/221:31:392
134491410,8ptp4l0-21swapper/021:48:230
134491410,5ptp4l31274-21ntp_states22:15:222
134491410,5ptp4l10083-21meminfo19:10:202
134491410,5ptp4l0-21swapper/321:50:213
134491410,5ptp4l0-21swapper/300:10:173
134491410,5ptp4l0-21swapper/021:55:270
134491410,5ptp4l0-21swapper/020:15:170
134491410,5ptp4l0-21swapper/019:20:100
134491410,4ptp4l998-21ps20:00:251
134491410,4ptp4l26071-21iostat_ios23:15:221
134491410,4ptp4l25871-21diskstats22:05:150
134491410,4ptp4l25747-21iostat20:55:180
134491410,4ptp4l23163-21df19:40:121
134491410,4ptp4l20185-21grep23:00:283
134491410,4ptp4l13845-21apt-get21:40:110
134491410,4ptp4l11691-21diskstats20:25:151
134491410,4ptp4l0-21swapper/000:27:550
134491410,4ptp4l0-21swapper/000:19:110
134491410,4ptp4l0-21swapper/000:10:200
134491410,3ptp4l5632-21memory23:40:221
134491410,3ptp4l0-21swapper/021:04:330
9100994034,4cyclictest33-21ksoftirqd/223:57:202
9100994034,4cyclictest33-21ksoftirqd/220:35:412
9100994034,4cyclictest33-21ksoftirqd/220:28:162
134491400,5ptp4l9-21ksoftirqd/022:00:210
134491400,5ptp4l0-21swapper/323:20:223
134491400,5ptp4l0-21swapper/320:20:173
134491400,5ptp4l0-21swapper/319:50:163
134491400,5ptp4l0-21swapper/319:35:123
134491400,5ptp4l0-21swapper/123:29:001
134491400,5ptp4l0-21swapper/123:28:591
134491400,5ptp4l0-21swapper/023:05:250
134491400,5ptp4l0-21swapper/020:40:130
134491400,4ptp4l9333-21apt-get23:50:141
134491400,4ptp4l9-21ksoftirqd/019:15:140
134491400,4ptp4l3718-21/usr/sbin/munin23:35:270
134491400,4ptp4l28731-21iostat_ios00:30:200
134491400,4ptp4l23200-21apt-get23:10:113
134491400,4ptp4l19286-21meminfo19:30:190
134491400,4ptp4l19286-21meminfo19:30:190
134491400,4ptp4l14202-21df22:50:151
134491400,4ptp4l14202-21df22:50:151
134491400,4ptp4l12404-21iostat23:55:180
134491400,4ptp4l0-21swapper/322:10:203
134491400,4ptp4l0-21swapper/321:15:243
134491400,4ptp4l0-21swapper/319:10:053
134491400,4ptp4l0-21swapper/223:05:292
134491400,4ptp4l0-21swapper/222:55:212
134491400,4ptp4l0-21swapper/219:50:152
134491400,4ptp4l0-21swapper/123:30:251
134491400,4ptp4l0-21swapper/122:28:571
134491400,4ptp4l0-21swapper/120:55:201
134491400,4ptp4l0-21swapper/023:15:280
134491400,4ptp4l0-21swapper/022:11:360
134491400,4ptp4l0-21swapper/021:17:590
134491400,4ptp4l0-21swapper/020:50:180
134491400,4ptp4l0-21swapper/020:50:180
134491400,4ptp4l0-21swapper/019:55:190
134491400,3ptp4l6347-21ls22:30:271
134491400,3ptp4l307-21df_inode22:20:150
134491400,3ptp4l30095-21df_inode21:05:150
134491400,10ptp4l0-21swapper/019:25:390
9100993933,4cyclictest33-21ksoftirqd/220:43:312
134491390,7ptp4l9-21ksoftirqd/019:10:050
134491390,5ptp4l15162-21tail22:50:252
134491390,5ptp4l15162-21tail22:50:252
134491390,5ptp4l0-21swapper/320:39:373
134491390,4ptp4l0-21swapper/323:35:123
134491390,4ptp4l0-21swapper/323:05:273
134491390,4ptp4l0-21swapper/322:55:233
134491390,4ptp4l0-21swapper/322:43:073
134491390,4ptp4l0-21swapper/322:30:203
134491390,4ptp4l0-21swapper/321:55:143
134491390,4ptp4l0-21swapper/321:40:233
134491390,4ptp4l0-21swapper/320:27:563
134491390,4ptp4l0-21swapper/320:11:343
134491390,4ptp4l0-21swapper/223:50:012
134491390,4ptp4l0-21swapper/223:10:122
134491390,4ptp4l0-21swapper/222:34:112
134491390,4ptp4l0-21swapper/222:00:152
134491390,4ptp4l0-21swapper/221:25:072
134491390,4ptp4l0-21swapper/220:15:272
134491390,4ptp4l0-21swapper/220:10:162
134491390,4ptp4l0-21swapper/123:20:261
134491390,4ptp4l0-21swapper/123:14:301
134491390,4ptp4l0-21swapper/123:03:591
134491390,4ptp4l0-21swapper/122:42:451
134491390,4ptp4l0-21swapper/122:20:211
134491390,4ptp4l0-21swapper/121:53:451
134491390,4ptp4l0-21swapper/121:25:151
134491390,4ptp4l0-21swapper/121:20:511
134491390,4ptp4l0-21swapper/119:57:401
134491390,4ptp4l0-21swapper/023:30:220
134491390,4ptp4l0-21swapper/022:45:130
134491390,4ptp4l0-21swapper/022:36:380
134491390,4ptp4l0-21swapper/021:51:430
134491390,4ptp4l0-21swapper/021:30:200
134491390,4ptp4l0-21swapper/020:10:250
134491390,4ptp4l0-21swapper/000:05:290
134491390,3ptp4l9397-21diskstats20:20:150
134491390,3ptp4l30139-21/usr/sbin/munin22:15:140
134491390,3ptp4l24142-21iostat_ios00:20:191
134491390,3ptp4l0-21swapper/219:40:252
134491390,3ptp4l0-21swapper/019:35:290
134491390,2ptp4l16276-21kworker/1:221:35:381
134491390,2ptp4l16276-21kworker/1:221:35:381
9100993833,3cyclictest33-21ksoftirqd/223:36:302
9100993832,4cyclictest33-21ksoftirqd/221:05:332
134491380,4ptp4l30806-21irqrtprio23:25:180
134491380,4ptp4l30806-21irqrtprio23:25:180
134491380,4ptp4l0-21swapper/321:10:473
134491380,4ptp4l0-21swapper/319:30:143
134491380,4ptp4l0-21swapper/319:30:143
134491380,4ptp4l0-21swapper/300:17:443
134491380,4ptp4l0-21swapper/223:50:182
134491380,4ptp4l0-21swapper/222:28:052
134491380,4ptp4l0-21swapper/221:55:132
134491380,4ptp4l0-21swapper/220:48:372
134491380,4ptp4l0-21swapper/219:30:212
134491380,4ptp4l0-21swapper/219:30:212
134491380,4ptp4l0-21swapper/200:17:512
134491380,4ptp4l0-21swapper/200:05:232
134491380,4ptp4l0-21swapper/122:10:131
134491380,4ptp4l0-21swapper/119:46:021
134491380,4ptp4l0-21swapper/100:35:161
134491380,4ptp4l0-21swapper/019:53:180
134491380,3ptp4l0-21swapper/322:00:163
134491380,3ptp4l0-21swapper/321:02:543
134491380,3ptp4l0-21swapper/223:24:192
134491380,3ptp4l0-21swapper/223:02:442
134491380,3ptp4l0-21swapper/222:20:062
134491380,3ptp4l0-21swapper/022:40:470
134491380,2ptp4l16276-21kworker/1:220:36:311
134491370,4ptp4l0-21swapper/323:42:153
134491370,4ptp4l0-21swapper/320:55:443
134491370,4ptp4l0-21swapper/223:28:502
134491370,4ptp4l0-21swapper/223:28:502
134491370,4ptp4l0-21swapper/221:14:192
134491370,3ptp4l0-21swapper/321:05:213
134491370,3ptp4l0-21swapper/220:55:432
134491370,3ptp4l0-21swapper/220:50:152
134491370,3ptp4l0-21swapper/220:50:152
134491370,3ptp4l0-21swapper/020:45:420
134491370,2ptp4l0-21swapper/223:18:042
134491360,3ptp4l0-21swapper/323:30:233
134491360,3ptp4l0-21swapper/200:04:322
910199354,7cyclictest0-21swapper/323:58:563
134491350,3ptp4l0-21swapper/300:00:153
910199318,7cyclictest0-21swapper/323:50:173
134491310,3ptp4l0-21swapper/223:30:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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