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2026-09-09 - 11:51
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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 376 highest latencies:
System rackcslot2.osadl.org (updated Wed Sep 09, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3232521640,1sleep032322-21tr19:03:090
137127953,21sleep10-21swapper/119:05:401
1767994034,1cyclictest7-21ksoftirqd/022:21:020
1767994010,0cyclictest0-21swapper/000:32:230
1767993937,1cyclictest81ktimersoftd/020:08:150
1767993934,1cyclictest7-21ksoftirqd/023:57:510
1768993610,25cyclictest0-21swapper/121:19:091
1767993627,5cyclictest7-21ksoftirqd/000:13:100
176799356,1cyclictest91rcu_preempt00:06:440
1767993513,8cyclictest91rcu_preempt19:53:140
176799337,2cyclictest91rcu_preempt20:39:010
1767993332,1cyclictest7-21ksoftirqd/021:49:250
1767993321,3cyclictest91rcu_preempt22:23:310
1767993320,4cyclictest91rcu_preempt22:35:450
1767993130,1cyclictest7-21ksoftirqd/022:52:510
1767993128,2cyclictest7-21ksoftirqd/023:12:520
1767993111,2cyclictest91rcu_preempt21:58:400
1767993111,2cyclictest91rcu_preempt21:13:590
1767993111,2cyclictest2068-21apache_accesses20:33:070
176799309,3cyclictest91rcu_preempt00:10:130
176799309,3cyclictest7-21ksoftirqd/022:11:400
1767993025,3cyclictest7-21ksoftirqd/020:49:230
1767993025,2cyclictest7-21ksoftirqd/023:38:100
1767993021,6cyclictest81ktimersoftd/000:33:090
1768992910,18cyclictest0-21swapper/122:52:441
176799296,0cyclictest91rcu_preempt21:08:130
176799295,4cyclictest91rcu_preempt20:18:160
1767992929,0cyclictest7-21ksoftirqd/021:19:530
1767992912,1cyclictest91rcu_preempt21:39:520
1767992911,2cyclictest91rcu_preempt23:32:580
1768992816,12cyclictest0-21swapper/123:51:251
176899280,0cyclictest0-21swapper/121:33:471
176799287,3cyclictest91rcu_preempt23:27:300
1767992826,1cyclictest26986-21df20:13:090
1767992824,3cyclictest15333-21diskmemload22:31:170
1767992824,2cyclictest7-21ksoftirqd/022:45:220
1767992822,5cyclictest5922-21ssh23:59:260
1767992816,10cyclictest26984-21/usr/sbin/munin23:43:150
1767992811,8cyclictest7-21ksoftirqd/000:21:320
1768992710,2cyclictest0-21swapper/121:12:211
1768992710,15cyclictest0-21swapper/122:18:281
176899270,27cyclictest0-21swapper/121:27:171
176899270,1cyclictest0-21swapper/122:36:411
176899270,1cyclictest0-21swapper/120:51:511
1767992725,1cyclictest8318-21ntp_states19:23:130
1767992725,1cyclictest25070-21python22:53:160
1767992725,1cyclictest1179-21apache_volume21:33:090
1767992725,1cyclictest10370-21memory20:53:130
1767992724,2cyclictest23632-21ssh00:26:270
1767992723,3cyclictest0-21swapper/020:28:110
1767992710,2cyclictest0-21swapper/022:15:360
176799270,25cyclictest30625-21/usr/sbin/munin20:23:130
176899260,2cyclictest4533-21hddtemp_smartct23:58:101
176799268,4cyclictest7-21ksoftirqd/023:06:510
1767992623,2cyclictest5642-21/usr/sbin/munin19:18:070
1767992622,3cyclictest9920-21/usr/sbin/munin19:28:110
1767992622,3cyclictest29972-21fschecks_count23:48:090
1767992622,3cyclictest15333-21diskmemload22:58:160
1767992622,2cyclictest636-21nscd22:03:170
1767992621,4cyclictest15815-21memory21:53:150
1767992619,6cyclictest32529-21sshd21:31:130
1767992617,5cyclictest7-21ksoftirqd/023:31:260
1767992613,4cyclictest7-21ksoftirqd/021:23:150
1768992510,0cyclictest0-21swapper/119:53:041
1767992522,2cyclictest8989-21apache_volume23:18:090
1767992522,2cyclictest15333-21diskmemload23:13:060
1767992522,2cyclictest15333-21diskmemload22:39:280
1767992522,2cyclictest0-21swapper/021:43:080
1767992521,3cyclictest21196-21expr19:58:100
1767992521,3cyclictest17523-21fschecks_time19:48:110
1767992519,5cyclictest11729-21hddtemp_smartct19:33:100
1767992517,7cyclictest12683-21sensors20:58:170
1767992511,12cyclictest15765-21/usr/sbin/munin19:43:100
1768992416,8cyclictest0-21swapper/120:55:491
1768992410,7cyclictest0-21swapper/122:31:331
176899240,3cyclictest17441-21rm23:28:511
1767992422,1cyclictest1791-21apache_accesses19:08:090
1768992322,1cyclictest0-21swapper/123:10:131
1768992315,6cyclictest16492-21apache222:15:401
1768992310,6cyclictest0-21swapper/119:38:151
1768992310,13cyclictest0-21swapper/123:45:391
176899230,12cyclictest0-21swapper/119:23:071
176899230,0cyclictest0-21swapper/100:26:291
1767992319,4cyclictest4069-21wget19:13:120
1767992315,7cyclictest15091-21chrt21:05:310
785022210,0sleep10-21swapper/123:15:551
176899227,10cyclictest100150irq/106-eth1-rx21:13:101
176899223,9cyclictest0-21swapper/119:18:161
1768992222,0cyclictest0-21swapper/120:16:391
176899222,12cyclictest0-21swapper/122:58:081
1768992220,1cyclictest6197-21fschecks_time20:43:111
1768992217,3cyclictest1199-21runrttasks00:31:041
1768992210,0cyclictest0-21swapper/121:32:391
176799226,12cyclictest0-21swapper/020:43:110
1498822210,1sleep00-21swapper/019:42:170
1768992119,1cyclictest16492-21apache222:01:401
1768992118,3cyclictest1972-21munin-node22:11:471
1768992113,5cyclictest16492-21apache220:38:151
1768992110,9cyclictest0-21swapper/122:23:251
176899203,9cyclictest0-21swapper/120:08:151
1768992019,1cyclictest16492-21apache219:33:091
1768992010,6cyclictest0-21swapper/119:13:111
1768992010,5cyclictest0-21swapper/120:33:091
1768992010,5cyclictest0-21swapper/100:09:381
1768992010,4cyclictest0-21swapper/119:28:081
176899200,18cyclictest0-21swapper/120:59:311
176899200,13cyclictest0-21swapper/121:57:091
176899200,11cyclictest0-21swapper/100:33:131
1576222010,0sleep10-21swapper/100:14:291
176899195,7cyclictest0-21swapper/122:43:121
176899194,11cyclictest0-21swapper/100:03:181
176899193,15cyclictest0-21swapper/123:38:161
176899192,8cyclictest0-21swapper/119:43:051
1768991918,0cyclictest0-21swapper/100:19:271
1768991916,1cyclictest1765-21cyclictest23:35:511
1768991914,4cyclictest100150irq/106-eth1-rx22:53:111
176899191,12cyclictest29339-21grep20:18:121
176899191,11cyclictest0-21swapper/121:48:101
1768991910,5cyclictest0-21swapper/120:23:091
1768991910,3cyclictest0-21swapper/121:43:121
1867521810,0sleep10-21swapper/119:50:171
176899182,9cyclictest0-21swapper/121:03:141
1768991817,1cyclictest0-21swapper/123:55:061
176899181,5cyclictest0-21swapper/119:08:111
1768991815,1cyclictest1765-21cyclictest22:03:301
1768991811,5cyclictest0-21swapper/123:23:091
1767991815,2cyclictest7-21ksoftirqd/020:03:090
1365521810,0sleep10-21swapper/122:37:591
176899174,7cyclictest0-21swapper/123:22:391
176899173,7cyclictest45-21kswapd023:03:071
176899166,5cyclictest0-21swapper/120:28:101
176899165,7cyclictest0-21swapper/121:38:051
176899163,5cyclictest21671-21sshd19:58:141
176899151,1cyclictest22945-21apache_accesses20:03:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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