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2026-08-02 - 19:32
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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 Sun Aug 02, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3179527849,8sleep10-21swapper/107:05:071
3207527049,8sleep00-21swapper/007:08:020
32278993418,15cyclictest13835-21kworker/1:212:10:171
32278993023,5cyclictest9716-21apache210:00:331
32278993010,10cyclictest0-21swapper/109:18:501
32276993030,0cyclictest0-21swapper/010:44:200
3227699300,29cyclictest0-21swapper/010:55:310
32278992929,0cyclictest0-21swapper/110:39:311
32278992910,12cyclictest0-21swapper/112:23:121
32276992925,3cyclictest0-21swapper/012:00:300
3227899280,19cyclictest24479-21snmpd10:06:321
32278992727,0cyclictest0-21swapper/111:44:321
32276992725,1cyclictest20112-21ssh12:06:080
32276992710,1cyclictest0-21swapper/010:51:300
32278992624,1cyclictest9716-21apache208:58:301
3227899261,4cyclictest0-21swapper/111:33:561
32278992522,2cyclictest9959-21ssh10:27:411
32276992514,6cyclictest0-21swapper/010:18:170
32276992510,7cyclictest0-21swapper/009:31:460
3227899244,18cyclictest9669-21kworker/1:209:39:271
3227899243,10cyclictest0-21swapper/108:28:381
32278992422,1cyclictest0-21swapper/110:17:351
3227899240,11cyclictest0-21swapper/110:08:271
3227699246,10cyclictest19272-21perf07:58:150
32276992414,6cyclictest0-21swapper/011:35:540
32278992319,3cyclictest0-21swapper/111:30:081
3227899230,15cyclictest0-21swapper/110:21:161
32276992320,1cyclictest9653-21awk11:53:150
32276992318,4cyclictest81ktimersoftd/009:35:380
32276992317,6cyclictest0-21swapper/012:16:250
32276992314,7cyclictest5607-21sshd11:47:240
3227699231,13cyclictest0-21swapper/007:38:250
32276992310,0cyclictest0-21swapper/010:13:200
3227699230,4cyclictest0-21swapper/012:20:060
1634422310,2sleep10-21swapper/110:35:021
3227899225,13cyclictest0-21swapper/109:03:331
3227899222,13cyclictest0-21swapper/110:50:261
32278992218,3cyclictest802-21apache210:57:351
32278992217,3cyclictest18300-21ntp_kernel_err12:03:321
3227899220,21cyclictest0-21swapper/112:01:311
3227699222,4cyclictest0-21swapper/011:24:210
32276992218,3cyclictest802-21apache207:19:340
32276992211,6cyclictest0-21swapper/009:44:430
32276992210,4cyclictest0-21swapper/012:28:190
3227899218,7cyclictest0-21swapper/107:28:331
3227899218,5cyclictest12171-21/usr/sbin/munin11:13:341
3227899215,8cyclictest0-21swapper/111:03:361
32278992117,2cyclictest9743-21apache209:52:291
32278992115,2cyclictest9743-21apache210:59:261
32278992110,9cyclictest0-21swapper/109:54:391
32278992110,5cyclictest0-21swapper/111:53:321
32278992110,5cyclictest0-21swapper/109:43:211
32278992110,4cyclictest0-21swapper/109:08:271
3227699219,7cyclictest636-21nscd11:56:460
32276992117,3cyclictest802-21apache210:00:120
32276992117,3cyclictest636-21nscd11:32:340
32276992116,3cyclictest802-21apache211:04:030
32276992111,6cyclictest24479-21snmpd10:09:140
32276992110,9cyclictest0-21swapper/008:22:510
32276992110,6cyclictest0-21swapper/011:38:330
32276992110,3cyclictest0-21swapper/009:13:170
32276992110,3cyclictest0-21swapper/007:13:370
32276992110,2cyclictest0-21swapper/010:26:200
3227699210,13cyclictest0-21swapper/010:33:180
1338722110,0sleep00-21swapper/010:31:530
3227899206,11cyclictest0-21swapper/111:18:291
3227899204,8cyclictest0-21swapper/107:08:361
3227899204,13cyclictest0-21swapper/110:43:281
3227899202,12cyclictest0-21swapper/107:18:391
32278992019,0cyclictest25072-21kworker/u4:109:32:141
32278992017,0cyclictest32274-21cyclictest12:17:261
32278992011,7cyclictest100150irq/106-eth1-rx11:40:471
32278992010,5cyclictest0-21swapper/111:09:041
32278992010,5cyclictest0-21swapper/108:45:131
3227699208,12cyclictest0-21swapper/007:25:350
3227699205,10cyclictest0-21swapper/009:48:350
3227699204,10cyclictest0-21swapper/007:58:380
32276992018,1cyclictest9743-21apache209:20:070
32276992012,4cyclictest100150irq/106-eth1-rx11:08:390
32276992010,9cyclictest0-21swapper/007:51:570
32276992010,5cyclictest0-21swapper/011:13:370
32276992010,5cyclictest0-21swapper/008:33:330
32276992010,2cyclictest0-21swapper/012:09:580
32276992010,2cyclictest0-21swapper/008:23:290
3227699200,8cyclictest0-21swapper/007:08:280
3227699200,19cyclictest7496-21users08:48:360
949921910,0sleep00-21swapper/012:34:380
3227899197,10cyclictest0-21swapper/112:32:421
3227899194,11cyclictest0-21swapper/109:24:241
3227899192,2cyclictest0-21swapper/112:27:191
32278991914,3cyclictest9743-21apache210:30:431
32278991913,5cyclictest17207-21apache207:13:451
32278991910,5cyclictest0-21swapper/109:13:251
32278991910,4cyclictest0-21swapper/108:33:371
32278991910,3cyclictest0-21swapper/107:44:281
3227699197,3cyclictest16684-21cut09:53:300
3227699195,4cyclictest10339-21diskstats08:58:290
3227699195,13cyclictest0-21swapper/012:26:170
3227699193,9cyclictest0-21swapper/010:07:550
32276991917,1cyclictest9716-21apache208:56:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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