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2026-08-28 - 19:27
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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 Fri Aug 28, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
964821840,5sleep3458999cyclictest07:20:163
134491670,7ptp4l0-21swapper/007:05:250
134491660,5ptp4l0-21swapper/207:55:222
4589996410,11cyclictest20853-21chrt11:11:193
134491640,4ptp4l0-21swapper/111:19:001
134491630,3ptp4l31029-21iostat_ios10:25:180
458999628,16cyclictest21406-21grep12:25:133
134491610,4ptp4l0-21swapper/012:10:280
134491600,4ptp4l15741-21cat09:50:261
458999598,8cyclictest29742-21ssh11:30:263
134491590,5ptp4l0-21swapper/107:07:591
134491590,4ptp4l23987-21memory07:50:200
134491590,3ptp4l8967-21timerandwakeup11:55:280
134491590,3ptp4l0-21swapper/209:05:202
134491590,17ptp4l0-21swapper/207:42:582
458999577,8cyclictest12626-21memory08:35:203
134491570,3ptp4l0-21swapper/009:55:160
134491560,4ptp4l0-21swapper/110:11:131
134491560,4ptp4l0-21swapper/011:29:080
134491560,3ptp4l0-21swapper/110:50:181
134491560,16ptp4l0-21swapper/111:33:471
458999556,5cyclictest0-21swapper/308:18:313
134491550,6ptp4l985-21hddtemp_smartct11:40:150
458999546,6cyclictest0-21swapper/310:14:253
458999546,10cyclictest14389-21cpuspeed_turbos11:00:123
134491540,4ptp4l0-21swapper/110:48:411
134491540,4ptp4l0-21swapper/109:40:271
134491540,4ptp4l0-21swapper/010:00:500
134491540,3ptp4l0-21swapper/208:36:592
134491540,3ptp4l0-21swapper/109:33:261
458999536,15cyclictest2318-21gnome-shell07:10:243
458999533,15cyclictest9836-21/usr/sbin/munin12:00:163
134491530,4ptp4l0-21swapper/112:20:521
134491530,4ptp4l0-21swapper/110:41:041
134491530,4ptp4l0-21swapper/110:38:191
134491530,4ptp4l0-21swapper/110:17:411
134491530,4ptp4l0-21swapper/109:56:021
134491530,4ptp4l0-21swapper/109:45:481
134491530,4ptp4l0-21swapper/108:17:011
134491530,4ptp4l0-21swapper/108:13:121
134491530,4ptp4l0-21swapper/107:52:491
134491530,4ptp4l0-21swapper/012:27:150
134491530,3ptp4l0-21swapper/208:51:342
134491530,3ptp4l0-21swapper/208:33:322
134491530,3ptp4l0-21swapper/108:05:261
134491530,3ptp4l0-21swapper/011:21:280
458999523,11cyclictest19429-21basename10:00:163
458999522,17cyclictest31481-21latency11:35:203
134491520,4ptp4l0-21swapper/209:21:292
134491520,4ptp4l0-21swapper/111:01:181
134491520,4ptp4l0-21swapper/109:35:451
134491520,3ptp4l0-21swapper/111:06:221
134491520,3ptp4l0-21swapper/110:21:301
134491520,3ptp4l0-21swapper/109:14:551
134491520,12ptp4l0-21swapper/107:32:411
134491520,11ptp4l0-21swapper/109:16:031
134491510,4ptp4l0-21swapper/208:02:582
134491510,4ptp4l0-21swapper/110:03:351
134491510,4ptp4l0-21swapper/007:56:480
458999507,11cyclictest0-21swapper/309:14:443
134491500,4ptp4l0-21swapper/208:23:522
134491500,4ptp4l0-21swapper/112:33:551
134491500,4ptp4l0-21swapper/112:29:121
134491500,4ptp4l0-21swapper/107:44:541
134491500,4ptp4l0-21swapper/107:18:101
134491500,4ptp4l0-21swapper/011:15:270
134491500,3ptp4l121rcu_preempt07:45:253
134491500,18ptp4l9-21ksoftirqd/009:38:470
458999497,5cyclictest0-21swapper/309:57:523
134491490,4ptp4l0-21swapper/208:44:542
134491490,4ptp4l0-21swapper/208:26:012
134491490,4ptp4l0-21swapper/111:21:361
134491490,4ptp4l0-21swapper/110:26:371
134491490,4ptp4l0-21swapper/107:55:291
134491490,4ptp4l0-21swapper/008:06:140
134491490,3ptp4l0-21swapper/211:27:052
134491490,3ptp4l0-21swapper/208:48:382
134491490,3ptp4l0-21swapper/009:05:420
134491490,10ptp4l0-21swapper/009:20:100
458999486,10cyclictest0-21swapper/311:16:193
458999486,10cyclictest0-21swapper/309:00:403
458999486,10cyclictest0-21swapper/308:50:143
134491480,4ptp4l0-21swapper/111:51:521
134491480,3ptp4l0-21swapper/208:58:222
134491480,3ptp4l0-21swapper/112:17:101
134491480,19ptp4l0-21swapper/109:25:241
458999477,6cyclictest0-21swapper/309:27:473
458999476,7cyclictest1533-21ssh08:10:253
458999476,5cyclictest0-21swapper/311:06:073
458999476,5cyclictest0-21swapper/307:31:013
458999473,16cyclictest17190-21cat12:15:183
458999473,15cyclictest0-21swapper/310:40:203
134491470,3ptp4l0-21swapper/111:58:001
134491470,3ptp4l0-21swapper/110:58:061
134491470,2ptp4l26152-21df12:35:120
458999467,9cyclictest0-21swapper/308:49:393
458999467,5cyclictest0-21swapper/309:50:423
458999467,10cyclictest12351-21irqrtprio07:25:193
458999466,10cyclictest0-21swapper/307:38:103
134491460,4ptp4l0-21swapper/110:08:481
134491460,3ptp4l2318-21gnome-shell12:17:580
134491460,3ptp4l0-21swapper/209:45:222
134491460,3ptp4l0-21swapper/007:40:240
458999458,7cyclictest0-21swapper/307:52:163
134491450,8ptp4l0-21swapper/011:34:160
134491450,3ptp4l0-21swapper/209:01:382
134491450,18ptp4l0-21swapper/108:55:131
458999447,10cyclictest0-21swapper/309:46:323
134491440,4ptp4l0-21swapper/307:09:183
134491440,4ptp4l0-21swapper/011:03:580
134491440,4ptp4l0-21swapper/007:19:140
134491440,3ptp4l0-21swapper/010:58:500
134491440,3ptp4l0-21swapper/010:42:060
134491440,10ptp4l0-21swapper/007:13:210
458999437,11cyclictest0-21swapper/309:07:263
134491430,9ptp4l0-21swapper/211:52:332
134491430,5ptp4l12483-21hddtemp_smartct09:45:160
134491430,5ptp4l0-21swapper/009:40:130
134491430,5ptp4l0-21swapper/008:15:230
134491430,4ptp4l23033-21apt-get07:50:122
134491430,4ptp4l10702-21ls10:50:210
134491430,4ptp4l0-21swapper/211:16:312
134491430,10ptp4l0-21swapper/012:24:210
46198420,4rtkit-daemon15109-21ntp_states08:40:221
458999425,10cyclictest0-21swapper/312:38:543
458999424,7cyclictest19942-21ls07:40:253
458999423,7cyclictest134491ptp4l08:30:243
4588994236,4cyclictest33-21ksoftirqd/207:33:112
134491420,9ptp4l0-21swapper/212:01:592
134491420,4ptp4l17794-21users07:35:280
134491420,4ptp4l0-21swapper/012:30:240
134491420,4ptp4l0-21swapper/010:49:570
134491420,4ptp4l0-21swapper/010:16:240
134491420,4ptp4l0-21swapper/009:13:340
134491420,3ptp4l2007-21ls11:40:263
134491420,3ptp4l0-21swapper/108:26:221
458999415,7cyclictest26858-21irqstats11:25:173
458999415,5cyclictest0-21swapper/309:35:063
458999415,5cyclictest0-21swapper/308:25:283
458999415,10cyclictest0-21swapper/309:15:283
4586994136,3cyclictest9-21ksoftirqd/010:40:010
134491410,7ptp4l31090-21if_enp1s011:35:181
134491410,5ptp4l7519-21/usr/sbin/munin11:55:263
134491410,5ptp4l0-21swapper/310:30:203
134491410,5ptp4l0-21swapper/308:05:233
134491410,5ptp4l0-21swapper/210:40:122
134491410,5ptp4l0-21swapper/209:50:162
134491410,5ptp4l0-21swapper/207:35:272
134491410,4ptp4l28163-21apt-get10:20:122
134491410,4ptp4l19363-21df_inode12:20:142
134491410,4ptp4l16353-21apt-get11:05:050
134491410,4ptp4l12578-21hddtemp_smartct12:05:150
134491410,4ptp4l0-21swapper/208:13:012
134491410,4ptp4l0-21swapper/109:09:431
134491410,4ptp4l0-21swapper/009:33:180
134491410,3ptp4l4616-21apt-get07:10:092
134491410,3ptp4l23720-21apt-get11:20:112
134491410,3ptp4l14298-21apt-get11:00:112
134491410,2ptp4l0-21swapper/010:34:190
4587994035,3cyclictest25-21ksoftirqd/108:30:171
4587994034,3cyclictest25-21ksoftirqd/112:00:131
4587994034,3cyclictest25-21ksoftirqd/109:25:011
4586994034,3cyclictest9-21ksoftirqd/009:25:120
134491400,6ptp4l0-21swapper/309:22:233
134491400,5ptp4l0-21swapper/209:10:122
134491400,5ptp4l0-21swapper/108:00:171
134491400,5ptp4l0-21swapper/107:35:131
134491400,5ptp4l0-21swapper/009:15:240
134491400,5ptp4l0-21swapper/008:00:190
134491400,4ptp4l31449-21irqstats11:35:200
134491400,4ptp4l14940-21meminfo08:40:203
134491400,4ptp4l0-21swapper/311:20:163
134491400,4ptp4l0-21swapper/309:30:223
134491400,4ptp4l0-21swapper/212:30:202
134491400,4ptp4l0-21swapper/107:28:081
134491400,4ptp4l0-21swapper/011:49:190
134491400,4ptp4l0-21swapper/011:10:180
134491400,4ptp4l0-21swapper/010:23:590
134491400,4ptp4l0-21swapper/008:58:140
134491400,4ptp4l0-21swapper/008:30:200
134491400,4ptp4l0-21swapper/007:45:140
134491400,3ptp4l2768-21apt-get10:35:112
134491400,3ptp4l26252-21diskstats12:35:131
134491400,3ptp4l2086-21ls11:40:282
134491400,3ptp4l0-21swapper/210:30:222
134491400,3ptp4l0-21swapper/010:06:020
134491400,3ptp4l0-21swapper/008:15:010
458999395,9cyclictest0-21swapper/310:53:593
458999395,5cyclictest0-21swapper/308:00:203
458999395,10cyclictest0-21swapper/308:21:083
134491390,5ptp4l13547-21taskset08:37:550
134491390,5ptp4l0-21swapper/312:30:223
134491390,5ptp4l0-21swapper/207:09:042
134491390,5ptp4l0-21swapper/010:10:080
134491390,5ptp4l0-21swapper/007:25:160
134491390,4ptp4l9081-21unixbench_singl09:35:242
134491390,4ptp4l0-21swapper/311:46:083
134491390,4ptp4l0-21swapper/307:55:233
134491390,4ptp4l0-21swapper/211:35:242
134491390,4ptp4l0-21swapper/208:15:042
134491390,4ptp4l0-21swapper/208:05:252
134491390,4ptp4l0-21swapper/112:05:191
134491390,4ptp4l0-21swapper/111:25:271
134491390,4ptp4l0-21swapper/111:10:221
134491390,4ptp4l0-21swapper/108:45:151
134491390,4ptp4l0-21swapper/108:38:261
134491390,4ptp4l0-21swapper/108:23:321
134491390,4ptp4l0-21swapper/012:00:220
134491390,4ptp4l0-21swapper/011:50:190
134491390,4ptp4l0-21swapper/009:50:220
134491390,4ptp4l0-21swapper/009:01:120
134491390,4ptp4l0-21swapper/008:50:210
134491390,4ptp4l0-21swapper/008:26:510
134491390,4ptp4l0-21swapper/008:20:270
134491390,3ptp4l21689-21meminfo07:45:202
134491390,3ptp4l13826-21apt-get07:30:120
134491390,3ptp4l0-21swapper/207:20:212
4587993833,3cyclictest25-21ksoftirqd/108:50:201
134491380,5ptp4l0-21swapper/310:55:103
134491380,5ptp4l0-21swapper/310:35:123
134491380,4ptp4l10836-21sed07:20:271
134491380,4ptp4l0-21swapper/312:20:133
134491380,4ptp4l0-21swapper/311:54:423
134491380,4ptp4l0-21swapper/310:45:163
134491380,4ptp4l0-21swapper/310:25:053
134491380,4ptp4l0-21swapper/310:23:563
134491380,4ptp4l0-21swapper/310:15:283
134491380,4ptp4l0-21swapper/310:05:153
134491380,4ptp4l0-21swapper/309:40:123
134491380,4ptp4l0-21swapper/212:05:232
134491380,4ptp4l0-21swapper/211:47:592
134491380,4ptp4l0-21swapper/211:30:072
134491380,4ptp4l0-21swapper/211:11:032
134491380,4ptp4l0-21swapper/210:59:322
134491380,4ptp4l0-21swapper/210:50:112
134491380,4ptp4l0-21swapper/210:45:152
134491380,4ptp4l0-21swapper/210:26:082
134491380,4ptp4l0-21swapper/210:10:132
134491380,4ptp4l0-21swapper/209:30:202
134491380,4ptp4l0-21swapper/209:25:132
134491380,4ptp4l0-21swapper/207:25:282
134491380,4ptp4l0-21swapper/207:18:322
134491380,4ptp4l0-21swapper/111:45:541
134491380,4ptp4l0-21swapper/111:40:201
134491380,4ptp4l0-21swapper/110:31:371
134491380,4ptp4l0-21swapper/107:49:591
134491380,4ptp4l0-21swapper/107:10:151
134491380,4ptp4l0-21swapper/008:47:590
134491380,4ptp4l0-21swapper/008:43:490
134491380,3ptp4l0-21swapper/312:05:253
134491380,3ptp4l0-21swapper/007:21:210
134491370,4ptp4l0-21swapper/307:15:053
134491370,4ptp4l0-21swapper/211:57:192
134491370,4ptp4l0-21swapper/211:09:592
134491370,4ptp4l0-21swapper/209:43:132
134491370,4ptp4l0-21swapper/209:18:432
134491370,3ptp4l0-21swapper/308:55:223
134491370,3ptp4l0-21swapper/212:35:202
134491370,3ptp4l0-21swapper/212:12:122
134491370,3ptp4l0-21swapper/210:05:182
134491370,3ptp4l0-21swapper/210:00:532
134491370,3ptp4l0-21swapper/112:10:331
134491360,4ptp4l0-21swapper/212:27:482
134491360,3ptp4l0-21swapper/312:13:493
134491360,3ptp4l0-21swapper/212:19:522
134491360,3ptp4l0-21swapper/210:17:582
134491360,3ptp4l0-21swapper/209:56:522
134491360,3ptp4l0-21swapper/109:02:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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