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2025-12-28 - 05:36
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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 Sun Dec 28, 2025 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63126956,9sleep10-21swapper/119:05:021
49562680,0sleep10-21swapper/100:18:451
217326654,8sleep00-21swapper/019:07:140
208052650,0sleep10-21swapper/121:55:081
326852630,0sleep10-21swapper/123:30:301
121892620,0sleep10-21swapper/122:24:551
261699357,5cyclictest91rcu_preempt23:14:521
261699355,6cyclictest24-21ksoftirqd/120:44:101
261699345,3cyclictest91rcu_preempt22:47:461
2615993410,23cyclictest0-21swapper/000:24:270
261699335,2cyclictest91rcu_preempt00:02:371
2616993332,0cyclictest24-21ksoftirqd/119:52:261
261699326,1cyclictest91rcu_preempt21:25:291
261699313,3cyclictest91rcu_preempt00:38:291
2616993116,3cyclictest91rcu_preempt00:22:351
2616993111,2cyclictest91rcu_preempt23:02:531
261699309,3cyclictest91rcu_preempt21:46:511
2616993026,2cyclictest24-21ksoftirqd/122:14:241
261699296,4cyclictest91rcu_preempt23:57:071
261699295,1cyclictest91rcu_preempt23:21:121
261699293,3cyclictest91rcu_preempt22:44:261
2616992924,1cyclictest24-21ksoftirqd/120:35:091
2616992914,12cyclictest24-21ksoftirqd/121:54:191
261699290,26cyclictest4616-21ls22:55:151
2615992924,4cyclictest17422-21apache200:32:490
2615992910,0cyclictest0-21swapper/023:49:420
261599290,28cyclictest12623-21/usr/sbin/munin21:45:160
2616992826,1cyclictest24-21ksoftirqd/120:50:151
2616992823,4cyclictest24-21ksoftirqd/123:51:321
261699276,8cyclictest24-21ksoftirqd/120:34:231
2616992715,9cyclictest100250irq/107-eth1-rx21:22:431
243622724,1sleep00-21swapper/019:09:560
261699269,3cyclictest91rcu_preempt21:44:411
261699267,4cyclictest91rcu_preempt23:06:431
261699263,1cyclictest24-21ksoftirqd/122:04:011
2616992622,3cyclictest28836-21apache_processe22:05:081
2616992622,3cyclictest27613-21perl23:25:111
2616992622,3cyclictest22297-21ssh23:18:401
2616992621,4cyclictest17394-21apache200:28:281
2616992618,4cyclictest0-21swapper/100:12:001
2616992618,3cyclictest6664-1kworker/u5:122:27:341
2616992523,2cyclictest21264-21/usr/sbin/munin21:15:101
2616992522,2cyclictest17004-21irqstats21:10:101
2616992522,2cyclictest12299-21ssh23:45:481
2616992514,10cyclictest29019-21sshd20:16:261
2615992511,11cyclictest0-21swapper/000:10:160
2615992510,7cyclictest0-21swapper/021:41:550
2616992422,1cyclictest6493-21apache_volume19:20:081
2616992422,0cyclictest24-21ksoftirqd/122:30:261
2616992421,2cyclictest7936-21ssh21:39:101
2616992421,2cyclictest7172-21/usr/sbin/munin20:45:111
2616992421,2cyclictest14592-21cstates21:05:071
2616992421,2cyclictest13284-21open_files21:00:131
2616992420,3cyclictest16176-21diskmemload00:08:321
2616992420,2cyclictest17394-21apache221:33:531
261699241,18cyclictest15980-21taskset00:32:101
2615992424,0cyclictest0-21swapper/019:36:000
2615992423,1cyclictest0-21swapper/021:18:170
2615992423,1cyclictest0-21swapper/020:45:120
261599240,6cyclictest1403-21cut21:30:140
2616992321,1cyclictest24811-21python20:05:181
2616992321,1cyclictest24-21ksoftirqd/122:35:161
2616992320,2cyclictest400-21sendmail_mailst22:50:171
2616992320,2cyclictest26205-21if_eth220:10:121
2616992320,2cyclictest0-21swapper/123:38:351
2616992319,3cyclictest4904-21hddtemp_smartct19:15:101
2616992318,4cyclictest29554-21apache_volume20:20:071
2616992314,2cyclictest24-21ksoftirqd/120:29:301
2616992220,1cyclictest21738-21sendmail-msp19:59:551
2616992219,2cyclictest11176-21awk19:30:141
2616992217,4cyclictest16295-21diskstats19:45:101
2616992214,7cyclictest5102-21ssh22:15:131
2616992213,2cyclictest91rcu_preempt20:00:091
2615992220,2cyclictest17394-21apache200:17:110
2615992219,2cyclictest17422-21apache220:10:130
2615992217,4cyclictest0-21swapper/023:20:170
2615992211,5cyclictest0-21swapper/022:44:120
2615992210,5cyclictest0-21swapper/023:40:070
2615992210,3cyclictest0-21swapper/022:39:290
2615992210,2cyclictest0-21swapper/021:20:110
2615992210,0cyclictest0-21swapper/021:11:150
261599220,17cyclictest16176-21diskmemload23:31:130
261699216,4cyclictest91rcu_preempt19:25:491
2616992118,2cyclictest14547-21idleruntime19:40:111
2616992113,7cyclictest0-21swapper/120:55:121
261599216,8cyclictest0-21swapper/022:12:180
2615992121,0cyclictest2613-21cyclictest22:45:190
2615992117,3cyclictest17422-21apache221:03:480
2615992115,2cyclictest0-21swapper/022:25:080
2615992114,5cyclictest17394-21apache200:36:580
2615992110,6cyclictest0-21swapper/022:50:080
2615992110,4cyclictest0-21swapper/020:06:020
261599210,21cyclictest0-21swapper/020:20:520
2616992016,4cyclictest0-21swapper/123:41:001
2616992011,4cyclictest24-21ksoftirqd/119:10:131
261599203,12cyclictest0-21swapper/022:08:020
2615992018,1cyclictest744-21snmpd22:16:250
2615992010,6cyclictest0-21swapper/023:10:050
2615992010,6cyclictest0-21swapper/000:02:580
2615992010,5cyclictest0-21swapper/020:25:130
2615992010,4cyclictest100250irq/107-eth1-rx21:55:070
2615992010,3cyclictest0-21swapper/023:07:380
1675222010,0sleep00-21swapper/023:51:590
2616991913,3cyclictest24-21ksoftirqd/119:35:161
2615991916,2cyclictest17422-21apache221:34:560
2615991910,5cyclictest744-21snmpd20:39:290
2615991910,5cyclictest0-21swapper/000:08:290
2615991910,3cyclictest0-21swapper/022:20:110
2615991910,3cyclictest0-21swapper/021:50:140
2615991910,3cyclictest0-21swapper/020:15:070
261599182,7cyclictest0-21swapper/022:00:160
261599182,7cyclictest0-21swapper/019:25:150
261599182,6cyclictest0-21swapper/019:50:130
2615991818,0cyclictest0-21swapper/023:39:240
2615991811,2cyclictest30797-21sh23:29:320
2615991810,4cyclictest0-21swapper/023:15:100
2615991810,4cyclictest0-21swapper/023:01:430
2615991810,4cyclictest0-21swapper/019:40:080
2615991810,3cyclictest0-21swapper/023:55:160
2615991810,3cyclictest0-21swapper/022:30:170
2615991810,3cyclictest0-21swapper/021:28:330
2615991810,2cyclictest0-21swapper/019:20:140
2615991712,4cyclictest0-21swapper/019:55:060
2615991711,3cyclictest0-21swapper/020:40:080
2615991710,5cyclictest0-21swapper/000:25:280
2615991710,4cyclictest0-21swapper/022:55:120
2615991710,3cyclictest0-21swapper/019:45:090
2615991710,2cyclictest0-21swapper/020:55:080
1160821710,0sleep00-21swapper/019:30:210
261599165,5cyclictest0-21swapper/020:30:100
261599163,6cyclictest10430-21perf20:54:550
2615991610,2cyclictest0-21swapper/021:05:160
2615991610,2cyclictest0-21swapper/019:15:170
2615991310,0cyclictest0-21swapper/020:00:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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