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2025-11-20 - 11:38
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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 rackcslot2.osadl.org (updated Thu Nov 20, 2025 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2697321320,0sleep026509-21/usr/sbin/munin22:52:030
2396021020,2sleep01073999cyclictest22:47:040
1036127454,8sleep10-21swapper/119:04:411
1014326855,8sleep00-21swapper/019:02:230
1073999336,2cyclictest91rcu_preempt22:12:380
10739993226,1cyclictest7-21ksoftirqd/000:11:580
10739993110,2cyclictest91rcu_preempt22:02:560
1074099300,1cyclictest23361-21taskset00:17:041
10739993021,4cyclictest0-21swapper/023:46:380
10740992923,4cyclictest5034-21apache222:39:231
10739992912,16cyclictest0-21swapper/022:17:000
10740992827,0cyclictest0-21swapper/120:17:081
10740992810,1cyclictest0-21swapper/123:46:191
10740992810,15cyclictest0-21swapper/122:20:151
10740992810,11cyclictest0-21swapper/121:25:311
1074099280,27cyclictest1877-21taskset21:33:241
10739992828,0cyclictest7-21ksoftirqd/000:23:440
10740992722,4cyclictest0-21swapper/122:07:411
10740992710,9cyclictest0-21swapper/100:01:581
1074099270,25cyclictest0-21swapper/120:55:081
1073999278,2cyclictest91rcu_preempt21:02:030
1073999277,4cyclictest91rcu_preempt23:07:030
10739992727,0cyclictest7-21ksoftirqd/023:12:180
10739992721,5cyclictest7-21ksoftirqd/023:22:080
10739992719,7cyclictest5010-21apache221:18:220
10739992713,4cyclictest636-21nscd00:28:290
10739992624,2cyclictest7-21ksoftirqd/023:46:470
10739992622,3cyclictest7-21ksoftirqd/019:51:410
10739992621,4cyclictest5010-21apache200:03:530
10739992610,14cyclictest0-21swapper/019:39:240
1074099254,20cyclictest10166-21kworker/1:122:26:431
10740992522,3cyclictest1111-21runrttasks22:55:571
1074099252,22cyclictest7108-21kworker/1:000:11:031
1073999252,5cyclictest91rcu_preempt21:07:190
10739992524,1cyclictest7-21ksoftirqd/023:52:050
10739992524,1cyclictest7-21ksoftirqd/022:01:370
10739992521,3cyclictest7-21ksoftirqd/022:38:550
10739992521,3cyclictest5034-21apache200:32:140
10739992520,4cyclictest5010-21apache222:31:180
10739992520,4cyclictest5010-21apache222:31:180
10739992520,2cyclictest7-21ksoftirqd/023:17:020
1074099248,11cyclictest13453-21diskmemload22:12:071
1073999249,4cyclictest91rcu_preempt22:23:000
1073999242,8cyclictest91rcu_preempt21:37:170
10739992422,2cyclictest0-21swapper/019:12:200
10739992422,1cyclictest7-21ksoftirqd/023:34:110
10739992419,3cyclictest7-21ksoftirqd/021:32:090
10739992413,2cyclictest91rcu_preempt21:47:290
1073999240,3cyclictest91rcu_preempt20:41:570
1073999240,22cyclictest0-21swapper/023:58:380
1074099236,8cyclictest0-21swapper/123:31:471
10740992313,7cyclictest5034-21apache223:36:501
10739992321,2cyclictest0-21swapper/021:52:530
10739992320,2cyclictest7-21ksoftirqd/023:36:540
10739992319,3cyclictest5034-21apache221:26:190
10739992318,4cyclictest7-21ksoftirqd/020:22:020
10739992318,4cyclictest5034-21apache223:00:240
10739992318,2cyclictest7-21ksoftirqd/020:37:050
10739992314,8cyclictest0-21swapper/019:21:050
10739992310,3cyclictest0-21swapper/000:20:150
1055722310,2sleep00-21swapper/021:46:180
1074099221,6cyclictest16872-21ssh21:53:391
10740992210,8cyclictest0-21swapper/122:58:201
10740992210,8cyclictest0-21swapper/121:36:531
10740992210,6cyclictest0-21swapper/119:54:411
1073999222,1cyclictest91rcu_preempt21:13:170
1073999220,1cyclictest91rcu_preempt19:51:530
810522110,0sleep10-21swapper/123:55:131
1333522110,0sleep10-21swapper/122:32:261
1074099216,11cyclictest1111-21runrttasks22:30:181
1074099216,11cyclictest1111-21runrttasks22:30:181
10740992121,0cyclictest0-21swapper/121:16:051
10740992121,0cyclictest0-21swapper/100:35:131
10740992118,2cyclictest5010-21apache200:16:081
10740992117,3cyclictest5034-21apache223:17:081
10740992116,4cyclictest588-21gmain20:02:441
10740992110,6cyclictest0-21swapper/123:09:111
10740992110,5cyclictest0-21swapper/123:27:021
10740992110,1cyclictest0-21swapper/121:48:511
1074099210,7cyclictest0-21swapper/100:27:021
10739992116,4cyclictest9589-1kworker/0:2H21:29:410
10739992110,6cyclictest0-21swapper/023:27:090
1073999210,14cyclictest0-21swapper/023:01:490
2616022010,0sleep10-21swapper/122:51:331
1074099205,9cyclictest0-21swapper/120:42:021
10740992017,2cyclictest5034-21apache221:17:371
10740992011,5cyclictest0-21swapper/123:04:571
10740992010,8cyclictest0-21swapper/100:26:261
10740992010,4cyclictest0-21swapper/123:57:051
10740992010,0cyclictest0-21swapper/122:44:371
1074099200,4cyclictest21808-21rm22:01:391
10739992018,1cyclictest5034-21apache222:07:260
10739992010,6cyclictest0-21swapper/022:42:510
10739992010,6cyclictest0-21swapper/022:32:020
10739992010,5cyclictest0-21swapper/020:51:560
1073999200,19cyclictest24467-21kworker/0:020:35:540
1073999200,10cyclictest0-21swapper/020:47:000
176821910,0sleep10-21swapper/123:46:541
1074099197,6cyclictest29807-21ls20:22:071
1074099196,9cyclictest0-21swapper/120:47:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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