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2026-03-24 - 16:44
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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 Tue Mar 24, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
639826855,8sleep00-21swapper/007:08:450
603826850,8sleep10-21swapper/107:05:001
183952390,1sleep018394-21cut09:49:320
6636993410,2cyclictest0-21swapper/109:13:431
6636992619,3cyclictest16540-21apache210:35:521
6635992626,0cyclictest0-21swapper/011:29:390
663599260,25cyclictest0-21swapper/012:09:160
6636992510,12cyclictest0-21swapper/112:32:061
6635992521,3cyclictest25146-21ssh11:29:040
6635992510,7cyclictest0-21swapper/009:24:340
6635992510,0cyclictest0-21swapper/011:14:550
6635992411,5cyclictest100150irq/106-eth1-rx12:22:100
663699237,10cyclictest14225-21cron07:29:191
663699236,7cyclictest20567-21diskmemload11:44:341
663699233,15cyclictest0-21swapper/112:19:311
6636992320,2cyclictest16540-21apache208:46:131
6636992310,5cyclictest0-21swapper/109:59:351
663599237,8cyclictest0-21swapper/010:44:060
6635992320,2cyclictest100250irq/107-eth1-rx12:09:350
6635992319,2cyclictest0-21swapper/009:48:130
6635992317,3cyclictest81ktimersoftd/009:12:250
6635992310,0cyclictest0-21swapper/009:40:220
663699228,7cyclictest7292-21/usr/sbin/munin12:34:311
663699226,10cyclictest0-21swapper/111:59:321
6636992220,1cyclictest22185-21idleruntime10:39:331
6636992217,3cyclictest24662-21/usr/sbin/munin09:14:361
6636992214,4cyclictest6633-21cyclictest09:20:261
6636992210,7cyclictest0-21swapper/111:03:181
6636992210,6cyclictest0-21swapper/108:29:391
6636992210,4cyclictest0-21swapper/109:32:481
6636992210,3cyclictest0-21swapper/110:47:101
6635992222,0cyclictest0-21swapper/010:17:040
6635992217,3cyclictest29337-21grep09:19:380
6635992214,4cyclictest599-21avahi-daemon10:49:340
6635992210,9cyclictest0-21swapper/011:10:500
6635992210,8cyclictest0-21swapper/009:34:400
6635992210,5cyclictest0-21swapper/009:55:030
6635992210,1cyclictest0-21swapper/009:33:450
663599220,0cyclictest0-21swapper/011:05:370
663699214,9cyclictest29628-21ls10:49:371
663699214,11cyclictest0-21swapper/107:54:351
663699214,10cyclictest0-21swapper/108:24:321
663699213,16cyclictest0-21swapper/112:09:351
663699212,2cyclictest29801-21ntp_states10:04:371
6636992119,1cyclictest636-21nscd12:17:241
6636992117,2cyclictest16517-21apache210:29:581
6636992110,7cyclictest0-21swapper/110:54:341
6636992110,4cyclictest0-21swapper/110:09:321
6636992110,4cyclictest0-21swapper/108:04:311
6635992110,4cyclictest0-21swapper/008:54:400
6635992110,1cyclictest0-21swapper/008:04:400
663599210,2cyclictest0-21swapper/011:02:090
663699209,7cyclictest16285-21latency_hist07:34:191
663699207,8cyclictest0-21swapper/107:39:371
663699205,8cyclictest0-21swapper/111:14:351
663699205,8cyclictest0-21swapper/107:59:331
663699202,11cyclictest0-21swapper/108:19:311
6636992019,1cyclictest8223-21apache207:19:311
6636992012,7cyclictest7075-21apache_accesses09:34:311
663699201,13cyclictest0-21swapper/110:19:361
6636992010,6cyclictest0-21swapper/107:14:321
6636992010,5cyclictest0-21swapper/111:19:301
6636992010,4cyclictest0-21swapper/111:29:311
6636992010,2cyclictest0-21swapper/111:34:231
6636992010,1cyclictest0-21swapper/110:26:131
6636992010,0cyclictest0-21swapper/107:34:331
663599203,11cyclictest100250irq/107-eth1-rx12:16:020
6635992020,0cyclictest0-21swapper/009:02:540
6635992019,0cyclictest0-21swapper/010:46:020
6635992018,1cyclictest0-21swapper/010:11:230
6635992017,1cyclictest0-21swapper/008:53:510
6635992012,4cyclictest16517-21apache208:42:050
6635992010,6cyclictest0-21swapper/008:29:350
6635992010,5cyclictest0-21swapper/008:19:320
6635992010,2cyclictest0-21swapper/008:09:370
6635992010,1cyclictest0-21swapper/012:31:090
6635992010,0cyclictest0-21swapper/007:17:420
663699195,9cyclictest0-21swapper/109:44:311
663699195,8cyclictest0-21swapper/112:04:301
663699195,7cyclictest0-21swapper/109:24:321
663699195,6cyclictest0-21swapper/110:14:311
663699193,9cyclictest16517-21apache208:39:301
663699192,9cyclictest0-21swapper/108:34:311
6636991918,1cyclictest16517-21apache209:58:471
6636991910,4cyclictest0-21swapper/111:24:351
6636991910,4cyclictest0-21swapper/107:09:321
6635991915,3cyclictest16517-21apache210:38:260
6635991915,3cyclictest1199-21runrttasks07:50:580
6635991915,2cyclictest24600-21ssh09:14:220
6635991912,5cyclictest100250irq/107-eth1-rx10:04:320
6635991911,4cyclictest0-21swapper/011:34:210
6635991910,3cyclictest0-21swapper/008:39:200
6635991910,2cyclictest0-21swapper/011:19:370
6635991910,2cyclictest0-21swapper/008:24:320
663599190,1cyclictest0-21swapper/010:58:410
663699189,8cyclictest18815-21apache_volume09:04:311
663699185,9cyclictest0-21swapper/107:44:301
663699185,12cyclictest0-21swapper/108:59:331
6636991818,0cyclictest0-21swapper/111:49:301
6636991812,3cyclictest100450irq/109-eth1-tx12:24:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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