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2025-11-16 - 15:48
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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 Nov 16, 2025 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1400827261,7sleep00-21swapper/007:02:480
1423126957,8sleep10-21swapper/107:05:081
14573993735,1cyclictest7-21ksoftirqd/010:52:040
14573993714,11cyclictest7-21ksoftirqd/010:34:460
14574993410,24cyclictest0-21swapper/111:32:331
1457399349,3cyclictest91rcu_preempt10:18:420
14573993418,7cyclictest7-21ksoftirqd/008:27:060
14573993330,2cyclictest7-21ksoftirqd/009:12:130
14573993328,4cyclictest7-21ksoftirqd/011:40:380
14573993328,2cyclictest7-21ksoftirqd/011:56:560
14573993327,4cyclictest7-21ksoftirqd/010:12:090
14573993316,7cyclictest7-21ksoftirqd/009:38:460
14573993310,4cyclictest7-21ksoftirqd/010:11:290
14573993229,2cyclictest18393-21apache_accesses10:57:000
14573993228,3cyclictest14595-21apache_processe07:06:590
14573993215,4cyclictest91rcu_preempt07:47:040
14573993212,2cyclictest91rcu_preempt11:42:090
14573993212,2cyclictest91rcu_preempt11:22:040
14574993110,3cyclictest0-21swapper/109:49:471
14573993127,3cyclictest2195-21hostname11:17:030
14573993127,3cyclictest0-21swapper/011:02:540
14573993113,5cyclictest7-21ksoftirqd/011:29:370
14573993110,3cyclictest91rcu_preempt11:08:550
14573993028,1cyclictest25540-21df11:47:010
14573993027,2cyclictest30064-21ssh10:29:560
14573993027,2cyclictest30064-21ssh10:29:560
14573993027,2cyclictest23877-21irqstats10:22:050
14573993027,2cyclictest15171-21/usr/sbin/munin08:32:070
14573993027,2cyclictest11975-21users10:47:100
14573993027,2cyclictest0-21swapper/012:26:310
14573993026,3cyclictest81ktimersoftd/009:02:300
14573993026,3cyclictest32203-21ssh09:51:450
14573993016,10cyclictest7-21ksoftirqd/009:31:580
14573993010,1cyclictest91rcu_preempt09:07:050
1457499290,24cyclictest13359-21latency_hist11:31:481
1457399299,2cyclictest91rcu_preempt10:46:030
14573992927,1cyclictest6620-21ssh10:00:000
14573992927,1cyclictest32560-21hddtemp_smartct07:52:030
14573992927,1cyclictest11561-21diskstats08:22:020
14573992926,2cyclictest7-21ksoftirqd/011:34:410
14573992926,2cyclictest4954-21awk12:02:080
14573992926,2cyclictest14713-21ssh09:29:000
14573992926,1cyclictest7-21ksoftirqd/012:12:270
14573992922,6cyclictest7208-21seq09:19:300
14574992825,1cyclictest0-21swapper/112:30:061
14573992826,2cyclictest0-21swapper/009:23:260
14573992826,1cyclictest3680-21apache_volume08:02:030
14573992826,1cyclictest23572-21nfs4_client08:52:050
14573992825,2cyclictest28512-21diskmemload10:38:520
14573992825,2cyclictest22389-21ssh12:27:000
14573992825,2cyclictest2167-21sh09:53:410
14573992824,3cyclictest28512-21diskmemload09:42:010
14573992823,4cyclictest30362-21apache_processe11:12:010
14573992823,4cyclictest29257-21sort11:52:020
14573992822,5cyclictest7-21ksoftirqd/012:07:040
14573992821,6cyclictest16519-21apache_volume07:12:030
14573992818,8cyclictest28141-21ssh12:33:510
14573992723,3cyclictest21778-21taskset07:23:250
14573992723,3cyclictest0-21swapper/012:17:060
14573992722,4cyclictest18802-21hddtemp_smartct07:17:020
14573992719,7cyclictest25033-21cstates08:57:010
14573992715,11cyclictest9971-21awk08:17:040
14573992624,1cyclictest26476-21apache_accesses07:37:030
14573992623,2cyclictest28512-21diskmemload10:02:490
14573992621,4cyclictest0-21swapper/008:49:540
14574992518,6cyclictest24479-21apache210:31:151
14574992518,6cyclictest24479-21apache210:31:151
14574992511,9cyclictest97850irq/107-eth1-rx12:34:461
1457499250,19cyclictest0-21swapper/110:16:051
14573992523,2cyclictest0-21swapper/008:16:350
14573992523,2cyclictest0-21swapper/007:31:070
14573992522,2cyclictest6052-21if_eth008:07:040
14573992522,2cyclictest1111-21runrttasks07:58:260
14573992520,4cyclictest0-21swapper/007:43:580
14573992518,7cyclictest0-21swapper/007:36:400
14574992415,6cyclictest0-21swapper/109:30:301
1457499241,22cyclictest30292-21/usr/sbin/munin07:47:051
14574992410,3cyclictest0-21swapper/112:23:211
14574992222,0cyclictest0-21swapper/112:02:231
14574992222,0cyclictest0-21swapper/110:59:311
1457499222,11cyclictest0-21swapper/107:22:031
1457499221,17cyclictest14624-21apache_accesses10:52:001
14574992210,8cyclictest0-21swapper/111:23:211
14574992210,8cyclictest0-21swapper/109:01:441
14574992210,6cyclictest0-21swapper/110:09:181
14574992210,6cyclictest0-21swapper/110:00:351
14573992211,4cyclictest19680-21missed_timers08:42:050
2681322110,1sleep10-21swapper/109:44:141
14574992115,1cyclictest0-21swapper/107:42:411
14574992110,6cyclictest0-21swapper/111:12:081
14574992110,5cyclictest0-21swapper/109:37:061
14574992110,5cyclictest0-21swapper/108:51:401
1457499210,1cyclictest0-21swapper/110:36:041
1457499203,9cyclictest0-21swapper/108:37:211
1457499203,4cyclictest0-21swapper/111:47:001
1457499202,11cyclictest168-21systemd-journal10:51:471
14574992019,1cyclictest709-21irqbalance09:33:321
14574992017,2cyclictest24452-21apache211:41:001
14574992016,2cyclictest24452-21apache212:15:051
14574992015,4cyclictest0-21swapper/110:42:241
14574992010,6cyclictest0-21swapper/110:22:001
14574992010,4cyclictest0-21swapper/110:39:351
14574992010,4cyclictest0-21swapper/109:07:011
1457499200,1cyclictest18540-21snmpd12:00:591
14573992017,2cyclictest7-21ksoftirqd/008:40:260
2832621910,0sleep10-21swapper/109:05:101
14574991919,0cyclictest0-21swapper/112:19:591
1457499191,7cyclictest24690-21sendmail-msp08:56:481
14574991915,2cyclictest24479-21apache209:53:231
14574991915,1cyclictest18540-21snmpd08:09:411
1457499191,4cyclictest0-21swapper/112:09:391
14574991914,2cyclictest231ktimersoftd/108:22:011
14574991910,4cyclictest0-21swapper/107:12:061
14574991910,3cyclictest0-21swapper/110:02:061
1457499190,3cyclictest0-21swapper/109:17:391
1457499188,5cyclictest28512-21diskmemload09:12:001
1457499187,6cyclictest0-21swapper/108:27:031
1457499186,11cyclictest0-21swapper/107:31:481
1457499184,8cyclictest0-21swapper/109:22:031
1457499183,5cyclictest0-21swapper/108:42:051
1457499181,9cyclictest0-21swapper/108:02:041
14574991816,1cyclictest21642-21df_inode11:42:011
14574991811,3cyclictest0-21swapper/111:07:421
14574991810,3cyclictest0-21swapper/111:02:081
1457499178,2cyclictest636-21nscd11:20:471
14574991712,4cyclictest24517-21kworker/1:207:55:401
14574991711,3cyclictest28425-21kworker/u4:210:17:571
14574991710,4cyclictest0-21swapper/107:37:051
14574991710,3cyclictest0-21swapper/108:12:011
14574991710,2cyclictest0-21swapper/107:07:071
1689921610,0sleep10-21swapper/108:36:421
1457499164,7cyclictest0-21swapper/107:27:021
1457499162,8cyclictest2555-21/usr/sbin/munin07:57:091
1457499162,11cyclictest0-21swapper/107:17:011
14574991611,2cyclictest29180-21fschecks_count11:52:021
1457499141,5cyclictest10362-21/usr/sbin/munin08:17:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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