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2026-03-28 - 12:13
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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 rackcslot2.osadl.org (updated Sat Mar 28, 2026 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2718527057,9sleep10-21swapper/119:05:561
2707026855,8sleep00-21swapper/019:04:440
230842670,0sleep00-21swapper/020:19:360
27690993910,11cyclictest91rcu_preempt00:36:461
27690993632,3cyclictest11516-21ssh23:26:021
27690993532,2cyclictest28549-21/usr/sbin/munin21:34:351
27690993432,1cyclictest18750-21hddtemp_smartct20:09:311
27690993431,2cyclictest8923-21diskmemload23:47:341
27690993331,2cyclictest8923-21diskmemload22:35:461
27690993330,2cyclictest8923-21diskmemload21:51:251
27690993330,2cyclictest3422-21smartctl19:29:331
27690993330,2cyclictest23298-21ssh22:13:161
27690993330,2cyclictest0-21swapper/122:14:581
27690993329,3cyclictest11372-21ssh22:40:181
27690993232,0cyclictest0-21swapper/119:44:321
27690993230,2cyclictest0-21swapper/120:30:021
27690993230,2cyclictest0-21swapper/100:31:471
27690993230,1cyclictest13629-21hddtemp_smartct22:44:311
27690993229,2cyclictest8923-21diskmemload21:13:131
27690993229,2cyclictest23192-21ssh23:42:521
27690993229,2cyclictest0-21swapper/123:35:591
27690993229,2cyclictest0-21swapper/123:12:391
27690993129,2cyclictest0-21swapper/122:03:111
27690993129,2cyclictest0-21swapper/121:29:381
27690993129,2cyclictest0-21swapper/100:06:061
27690993128,2cyclictest20203-21ssh22:54:161
27690993127,3cyclictest0-21swapper/120:54:381
27690993126,4cyclictest0-21swapper/123:49:331
27690993122,8cyclictest1604-21ssh22:27:351
27690993116,11cyclictest8923-21diskmemload00:22:341
27690993111,1cyclictest91rcu_preempt22:19:271
27690993028,2cyclictest0-21swapper/123:55:131
27690993027,2cyclictest13030-21ssh00:14:361
27690993026,3cyclictest10996-21timerwakeupswit21:54:371
27690993020,9cyclictest8923-21diskmemload21:16:221
27690993017,9cyclictest8923-21diskmemload00:04:071
27689993010,5cyclictest0-21swapper/000:39:140
27690992926,2cyclictest1635-21diskstats20:49:301
2768999290,26cyclictest0-21swapper/023:54:530
27690992827,1cyclictest0-21swapper/119:19:371
27690992825,3cyclictest0-21swapper/123:21:171
27690992825,2cyclictest30928-21taskset23:09:161
27690992825,2cyclictest17095-21df_inode22:04:311
27690992824,3cyclictest0-21swapper/121:07:011
27690992822,4cyclictest32342-21apache222:58:581
27690992821,6cyclictest20544-21df21:24:291
27690992810,18cyclictest0-21swapper/119:42:391
2768999280,24cyclictest0-21swapper/023:14:080
27690992725,2cyclictest0-21swapper/100:29:031
27690992725,2cyclictest0-21swapper/100:09:481
27690992720,7cyclictest0-21swapper/121:00:481
27690992719,6cyclictest31201-21sh21:39:201
2769099271,22cyclictest0-21swapper/122:31:081
27690992625,1cyclictest0-21swapper/123:30:301
27690992624,2cyclictest0-21swapper/120:39:271
27690992624,2cyclictest0-21swapper/119:14:131
27690992623,2cyclictest0-21swapper/123:04:041
27690992618,8cyclictest0-21swapper/119:17:401
2769099260,23cyclictest0-21swapper/121:45:211
27689992610,9cyclictest0-21swapper/022:35:430
27690992523,2cyclictest0-21swapper/119:49:291
27690992516,8cyclictest0-21swapper/120:20:021
27689992510,7cyclictest0-21swapper/000:14:280
27690992418,5cyclictest0-21swapper/119:58:301
2768999242,2cyclictest0-21swapper/021:35:350
27689992322,0cyclictest7-21ksoftirqd/019:24:170
27689992311,6cyclictest6634-21ssh00:04:340
27689992311,1cyclictest0-21swapper/020:24:370
27689992310,6cyclictest0-21swapper/022:44:350
27689992310,2cyclictest0-21swapper/021:14:480
27689992310,11cyclictest0-21swapper/020:12:150
2768999230,20cyclictest0-21swapper/022:05:500
2768999230,1cyclictest0-21swapper/020:33:380
2769099223,14cyclictest0-21swapper/119:59:351
27690992220,2cyclictest0-21swapper/120:15:581
27690992219,2cyclictest802-21apache221:21:111
2769099221,13cyclictest0-21swapper/120:24:301
2768999228,10cyclictest636-21nscd22:02:060
27689992217,4cyclictest32342-21apache221:46:100
27689992213,4cyclictest0-21swapper/000:00:220
27689992212,4cyclictest0-21swapper/023:17:070
27689992210,6cyclictest0-21swapper/022:18:020
27689992210,5cyclictest0-21swapper/023:04:360
2769099215,12cyclictest0-21swapper/120:04:381
2769099211,19cyclictest0-21swapper/123:14:341
27689992120,1cyclictest32320-21apache223:41:280
27689992116,1cyclictest0-21swapper/022:29:370
27689992115,5cyclictest32320-21apache221:26:020
27689992115,5cyclictest23895-21munin-node19:29:040
27689992110,4cyclictest0-21swapper/022:49:420
27689992110,3cyclictest8734-21latency_hist19:44:180
27689992110,3cyclictest0-21swapper/019:09:350
27689992110,3cyclictest0-21swapper/000:19:220
27689992110,0cyclictest0-21swapper/022:59:370
301622010,0sleep00-21swapper/020:52:520
2769099200,11cyclictest0-21swapper/119:34:301
2768999206,7cyclictest0-21swapper/020:54:310
2768999204,8cyclictest0-21swapper/022:24:340
2768999203,9cyclictest0-21swapper/019:44:310
2768999202,16cyclictest27657-21taskset23:49:250
2768999202,11cyclictest20472-21apache_volume22:54:310
2768999201,2cyclictest0-21swapper/023:47:280
27689992012,2cyclictest0-21swapper/021:58:260
27689992011,4cyclictest0-21swapper/021:50:240
27689992010,5cyclictest0-21swapper/021:04:340
27689992010,5cyclictest0-21swapper/000:25:000
27689992010,4cyclictest0-21swapper/000:29:240
27689992010,3cyclictest0-21swapper/022:41:250
27689992010,3cyclictest0-21swapper/021:39:550
27689992010,2cyclictest0-21swapper/023:25:510
2769099193,12cyclictest0-21swapper/119:24:381
2768999195,5cyclictest23969-21apache_volume21:29:300
2768999193,9cyclictest0-21swapper/022:19:310
27689991911,3cyclictest0-21swapper/020:14:370
2768999191,10cyclictest0-21swapper/023:21:590
27689991910,5cyclictest0-21swapper/021:09:300
27689991910,4cyclictest0-21swapper/022:09:190
27689991910,4cyclictest0-21swapper/020:44:390
27689991910,4cyclictest0-21swapper/019:34:340
27689991910,0cyclictest18566-21ssh21:20:440
27690991811,3cyclictest0-21swapper/120:44:311
2768999187,9cyclictest0-21swapper/019:54:300
2768999186,5cyclictest8923-21diskmemload00:09:280
2768999185,8cyclictest0-21swapper/019:14:310
2768999182,11cyclictest0-21swapper/020:34:390
27689991810,5cyclictest100250irq/107-eth1-rx23:31:090
27689991810,4cyclictest0-21swapper/019:49:360
27689991810,3cyclictest0-21swapper/023:37:190
1804621810,0sleep00-21swapper/020:07:270
27690991715,2cyclictest0-21swapper/120:35:211
27689991710,5cyclictest0-21swapper/020:39:350
27689991710,2cyclictest0-21swapper/019:29:310
27689991510,0cyclictest0-21swapper/019:59:410
2768999142,5cyclictest6033-21ntp_states20:59:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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