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2026-08-28 - 23:17
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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 100 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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