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2026-04-11 - 16:42
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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 rackcslot2.osadl.org (updated Sat Apr 11, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
140727361,7sleep00-21swapper/007:05:270
242282670,1sleep10-21swapper/111:34:271
141026754,9sleep10-21swapper/107:05:281
1948994310,1cyclictest24-21ksoftirqd/109:09:221
1947994310,32cyclictest0-21swapper/008:14:270
1947994310,26cyclictest0-21swapper/009:49:260
1947994210,31cyclictest0-21swapper/011:37:070
1947994210,31cyclictest0-21swapper/007:44:070
1948994111,3cyclictest24-21ksoftirqd/112:34:321
1947994110,30cyclictest0-21swapper/012:05:200
1947994110,30cyclictest0-21swapper/011:54:470
1947994110,30cyclictest0-21swapper/011:49:330
1947994110,30cyclictest0-21swapper/011:17:210
1947994110,30cyclictest0-21swapper/011:00:020
1947994110,30cyclictest0-21swapper/009:56:260
1947994110,30cyclictest0-21swapper/008:39:320
1947994110,28cyclictest0-21swapper/012:29:310
1947994110,28cyclictest0-21swapper/010:11:420
1947994010,30cyclictest0-21swapper/011:19:310
1947994010,29cyclictest0-21swapper/011:26:590
1947994010,29cyclictest0-21swapper/011:04:220
1947994010,29cyclictest0-21swapper/010:50:060
1947994010,29cyclictest0-21swapper/010:24:250
1947993910,29cyclictest0-21swapper/010:39:250
1947993910,28cyclictest3588-21kworker/u4:209:36:560
1947993910,28cyclictest25654-1kworker/u5:109:22:470
1947993910,28cyclictest0-21swapper/011:47:210
1947993910,28cyclictest0-21swapper/011:13:560
1947993910,28cyclictest0-21swapper/010:57:230
1947993910,28cyclictest0-21swapper/010:34:430
1947993910,28cyclictest0-21swapper/010:16:500
1947993910,28cyclictest0-21swapper/007:54:240
1947993910,27cyclictest0-21swapper/012:24:300
1948993836,0cyclictest24-21ksoftirqd/111:20:541
1948993811,2cyclictest24-21ksoftirqd/109:03:161
1947993810,28cyclictest0-21swapper/012:34:260
1947993810,27cyclictest0-21swapper/011:40:190
1947993810,27cyclictest0-21swapper/009:45:490
1947993810,27cyclictest0-21swapper/008:45:340
1947993810,23cyclictest0-21swapper/012:12:510
1948993710,2cyclictest91rcu_preempt09:39:261
1947993710,26cyclictest0-21swapper/009:39:240
1947993710,26cyclictest0-21swapper/008:09:330
1947993710,26cyclictest0-21swapper/007:47:490
1947993710,25cyclictest0-21swapper/007:14:370
194899368,4cyclictest91rcu_preempt10:22:201
1948993619,8cyclictest91rcu_preempt10:07:511
1947993610,26cyclictest0-21swapper/009:59:430
1947993610,25cyclictest0-21swapper/010:29:330
1947993610,25cyclictest0-21swapper/010:08:440
1947993610,25cyclictest0-21swapper/009:33:260
1947993610,25cyclictest0-21swapper/008:19:440
1947993610,24cyclictest0-21swapper/010:22:000
1947993510,5cyclictest0-21swapper/008:54:020
1947993510,25cyclictest0-21swapper/009:17:420
1947993510,24cyclictest0-21swapper/009:10:290
1947993510,23cyclictest0-21swapper/012:21:410
1947993510,23cyclictest0-21swapper/008:24:250
194899348,1cyclictest91rcu_preempt11:49:181
194899348,1cyclictest91rcu_preempt09:32:111
1948993423,3cyclictest91rcu_preempt10:40:061
1948993411,1cyclictest91rcu_preempt11:29:271
1947993410,23cyclictest0-21swapper/011:59:290
1947993410,23cyclictest0-21swapper/009:06:400
1947993410,20cyclictest0-21swapper/012:14:540
194899337,1cyclictest91rcu_preempt12:14:251
194899336,1cyclictest91rcu_preempt12:25:061
1948993331,1cyclictest24-21ksoftirqd/109:20:441
1948993327,4cyclictest24-21ksoftirqd/110:34:461
1948993313,1cyclictest91rcu_preempt12:08:471
1948993312,4cyclictest91rcu_preempt11:07:021
1947993310,23cyclictest0-21swapper/007:09:170
1947993310,22cyclictest0-21swapper/010:45:080
1947993310,22cyclictest0-21swapper/010:45:080
1948993226,5cyclictest24-21ksoftirqd/111:44:491
1948993223,5cyclictest24-21ksoftirqd/109:34:451
1948993211,2cyclictest91rcu_preempt10:59:361
1947993210,21cyclictest0-21swapper/007:19:290
194899319,1cyclictest91rcu_preempt10:58:041
1948993127,3cyclictest18362-21ntp_kernel_pll_07:49:301
1948993122,6cyclictest24-21ksoftirqd/107:20:551
1948993027,2cyclictest31756-21users12:29:311
1948993027,2cyclictest21998-21irqstats07:59:281
1948993024,2cyclictest24-21ksoftirqd/109:50:021
1947993010,20cyclictest0-21swapper/007:32:390
1947993010,19cyclictest0-21swapper/009:24:260
194899299,1cyclictest91rcu_preempt09:48:091
194899298,2cyclictest91rcu_preempt10:24:311
194899297,0cyclictest91rcu_preempt07:44:241
1948992926,2cyclictest32177-21cat08:24:301
1948992926,2cyclictest24178-21memory10:49:281
1948992926,2cyclictest16178-21apache_accesses11:24:231
1948992926,2cyclictest15402-21sshd09:05:021
1948992925,3cyclictest30622-21latency_hist10:14:111
1948992925,3cyclictest2833-21perl08:34:271
1948992925,2cyclictest24-21ksoftirqd/107:28:051
1947992910,18cyclictest0-21swapper/011:29:160
1947992910,17cyclictest0-21swapper/007:35:140
1948992826,1cyclictest9017-21ntp_states08:49:291
1948992826,1cyclictest14001-21diskstats07:39:241
1948992825,2cyclictest9512-21diskstats10:29:241
1948992825,2cyclictest10910-21/usr/sbin/munin08:54:281
1948992824,3cyclictest27701-21if_eth308:14:271
1948992824,3cyclictest20288-21if_err_eth309:14:271
1948992811,16cyclictest0-21swapper/111:54:221
1947992810,17cyclictest0-21swapper/008:29:340
1947992810,15cyclictest0-21swapper/007:49:330
1948992726,1cyclictest0-21swapper/108:13:171
1948992725,1cyclictest17138-21irqstats09:54:281
1948992724,2cyclictest4999-21timerandwakeup07:14:321
1948992724,2cyclictest30871-21cron08:24:111
1948992724,2cyclictest24-21ksoftirqd/111:14:071
1948992724,2cyclictest20328-21perl09:59:251
1948992724,2cyclictest0-21swapper/109:25:091
1948992723,3cyclictest25884-21ssh12:22:101
1948992723,3cyclictest0-21swapper/107:29:311
1948992715,11cyclictest15823-21diskmemload11:14:351
1947992710,13cyclictest0-21swapper/009:00:150
1948992623,2cyclictest8908-21apache_processe11:59:221
1948992623,2cyclictest1305-21/usr/sbin/munin08:29:291
1948992523,1cyclictest11855-21apache_accesses07:34:231
1948992522,2cyclictest21403-21users10:44:331
1948992522,2cyclictest21403-21users10:44:331
1948992522,2cyclictest19523-21apache_volume07:54:241
1948992516,8cyclictest1199-21runrttasks08:44:551
1948992515,9cyclictest16611-21sh12:09:261
1948992421,2cyclictest30793-21apache_accesses10:14:231
1948992415,5cyclictest26935-21apache_volume11:39:221
1948992320,2cyclictest3224-21unixbench_singl07:09:311
1947992310,13cyclictest0-21swapper/008:34:310
1947992310,12cyclictest0-21swapper/008:56:160
1947992310,12cyclictest0-21swapper/008:00:550
1948992219,2cyclictest0-21swapper/108:39:241
1948992118,2cyclictest0-21swapper/108:09:111
1947992010,2cyclictest0-21swapper/008:04:250
1947992010,10cyclictest0-21swapper/007:28:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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