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2026-03-20 - 17:38
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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 792 highest latencies:
System rackcslot2.osadl.org (updated Fri Mar 20, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275652720,2sleep0959399cyclictest12:13:000
928426754,8sleep00-21swapper/007:08:030
897426754,8sleep10-21swapper/107:04:491
69332610,0sleep00-21swapper/012:29:270
286842600,2sleep0959399cyclictest09:14:390
959499344,10cyclictest24-21ksoftirqd/112:18:491
9594993333,0cyclictest0-21swapper/112:29:181
9594993320,2cyclictest91rcu_preempt12:31:471
9594993230,1cyclictest24-21ksoftirqd/109:45:321
9594993220,4cyclictest91rcu_preempt11:03:061
9594993210,9cyclictest91rcu_preempt11:28:151
959499312,2cyclictest91rcu_preempt08:04:371
9594993117,13cyclictest24-21ksoftirqd/111:12:101
9594993110,16cyclictest0-21swapper/110:54:311
959499306,3cyclictest91rcu_preempt10:37:061
959499302,1cyclictest91rcu_preempt09:31:061
9594993019,6cyclictest30533-21sh10:02:091
9594993013,3cyclictest91rcu_preempt07:56:041
9593993010,19cyclictest0-21swapper/008:11:130
959499299,1cyclictest91rcu_preempt11:44:061
9594992926,2cyclictest24-21ksoftirqd/111:49:391
9594992920,4cyclictest24-21ksoftirqd/111:05:281
9593992910,12cyclictest0-21swapper/011:48:510
9594992826,1cyclictest0-21swapper/109:27:131
9593992811,10cyclictest100250irq/107-eth1-rx09:28:520
9594992725,2cyclictest20323-21ssh10:33:121
9594992725,1cyclictest24-21ksoftirqd/111:45:021
959499270,26cyclictest0-21swapper/112:07:291
9593992710,10cyclictest0-21swapper/011:25:390
959499263,1cyclictest91rcu_preempt11:33:121
9594992620,6cyclictest0-21swapper/110:40:071
959499261,12cyclictest0-21swapper/111:14:401
9593992626,0cyclictest0-21swapper/008:59:550
9593992621,4cyclictest81ktimersoftd/010:39:310
9594992525,0cyclictest24-21ksoftirqd/110:13:121
9594992523,2cyclictest0-21swapper/110:14:401
9594992520,4cyclictest11359-21users09:34:421
9594992515,5cyclictest221rcuc/110:19:311
9593992510,9cyclictest0-21swapper/011:02:110
959499243,4cyclictest91rcu_preempt09:54:331
9594992421,2cyclictest629-21users10:49:411
9594992421,2cyclictest20552-21ntp_states08:59:381
9594992421,2cyclictest0-21swapper/108:25:121
9594992420,3cyclictest657-21sh12:19:401
9594992420,3cyclictest32686-21ntp_states11:34:381
9594992414,6cyclictest221rcuc/109:14:401
9593992424,0cyclictest0-21swapper/008:27:400
9593992410,6cyclictest0-21swapper/011:50:250
959499236,5cyclictest91rcu_preempt11:57:191
959499235,15cyclictest0-21swapper/109:19:311
9594992320,2cyclictest8976-21ntp_states08:29:391
9594992320,2cyclictest24078-21ntp_kernel_pll_07:44:391
9594992320,2cyclictest23888-21ssh09:53:351
9594992320,2cyclictest15641-21fschecks_count07:24:341
9594992314,8cyclictest0-21swapper/107:24:071
9593992322,1cyclictest0-21swapper/007:30:060
9593992314,5cyclictest0-21swapper/008:04:360
9593992312,6cyclictest636-21nscd10:55:270
959499228,5cyclictest24-21ksoftirqd/108:34:371
959499223,3cyclictest0-21swapper/109:43:041
9594992220,2cyclictest0-21swapper/107:52:181
9594992220,1cyclictest24750-21apache_processe12:09:321
9594992220,1cyclictest15880-21apache_accesses08:49:331
9594992219,2cyclictest17618-21ssh11:59:261
9594992219,2cyclictest0-21swapper/110:06:211
9594992218,3cyclictest0-21swapper/108:14:341
9594992214,7cyclictest25019-21users09:09:421
9594992214,7cyclictest12805-21ssh12:36:541
959399224,11cyclictest0-21swapper/010:19:210
959399223,11cyclictest0-21swapper/009:09:060
9593992221,1cyclictest0-21swapper/007:13:170
9593992210,6cyclictest0-21swapper/010:28:420
959499219,7cyclictest6235-21latency_hist08:24:211
959499219,4cyclictest231ktimersoftd/109:04:381
9594992119,2cyclictest0-21swapper/111:20:111
9594992119,2cyclictest0-21swapper/110:48:191
9594992118,2cyclictest19689-21cstates07:34:331
9594992118,2cyclictest17674-21hwlatdetect07:29:341
959399215,7cyclictest0-21swapper/012:04:380
9593992121,0cyclictest19429-21apache211:15:060
9593992119,2cyclictest19419-21apache211:11:330
9593992119,1cyclictest19429-21apache210:53:340
9593992111,5cyclictest636-21nscd07:54:360
9593992110,9cyclictest0-21swapper/009:36:300
9593992110,7cyclictest0-21swapper/011:07:170
9593992110,4cyclictest0-21swapper/010:31:400
9593992110,4cyclictest0-21swapper/009:45:130
9593992110,4cyclictest0-21swapper/008:19:380
9593992110,3cyclictest0-21swapper/011:32:400
9593992110,10cyclictest0-21swapper/007:49:310
959399210,13cyclictest25811-21taskset09:54:550
9594992018,1cyclictest12293-21ntp_states07:14:371
9594992017,2cyclictest16590-21ssh10:28:021
9594992013,6cyclictest10271-21missed_timers07:09:371
9594992010,7cyclictest0-21swapper/108:54:421
959399209,2cyclictest24042-21kworker/u4:210:46:040
959399206,10cyclictest0-21swapper/012:14:320
959399205,7cyclictest0-21swapper/009:49:310
9593992018,1cyclictest15375-21apache_accesses07:24:320
9593992012,2cyclictest16009-21cstates08:49:340
959399201,18cyclictest0-21swapper/012:21:080
9593992011,5cyclictest0-21swapper/011:42:360
9593992011,5cyclictest0-21swapper/009:10:220
959499198,6cyclictest231ktimersoftd/108:09:331
9594991917,2cyclictest0-21swapper/108:48:011
9594991913,4cyclictest30362-21users07:59:421
959399196,7cyclictest0-21swapper/009:39:400
959399193,9cyclictest0-21swapper/010:04:360
959399192,9cyclictest0-21swapper/012:24:320
9593991910,7cyclictest0-21swapper/007:19:370
9593991910,4cyclictest0-21swapper/010:19:340
9593991910,4cyclictest0-21swapper/010:09:330
9593991910,3cyclictest0-21swapper/009:19:410
9593991910,2cyclictest15165-21grep11:54:410
9593991910,2cyclictest0-21swapper/010:01:320
9593991910,0cyclictest0-21swapper/008:39:310
9594991815,2cyclictest13604-21pidof08:42:231
959399183,6cyclictest0-21swapper/007:59:320
959399181,8cyclictest0-21swapper/008:34:410
9593991816,0cyclictest81ktimersoftd/010:35:310
9593991815,2cyclictest19429-21apache211:23:280
9593991810,5cyclictest0-21swapper/009:31:410
9593991810,5cyclictest0-21swapper/007:34:320
9593991810,2cyclictest0-21swapper/012:02:170
9593991810,2cyclictest0-21swapper/011:35:530
959399172,8cyclictest0-21swapper/012:34:380
9593991710,2cyclictest0-21swapper/007:39:320
9594991614,1cyclictest22594-21ls07:39:411
959399163,7cyclictest0-21swapper/007:44:350
9593991610,2cyclictest0-21swapper/008:29:340
9593991610,1cyclictest0-21swapper/008:14:320
147252169,0sleep00-21swapper/008:44:380
959399153,11cyclictest0-21swapper/007:14:330
9593991312,1cyclictest19429-21apache208:54:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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