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2026-06-02 - 00:39
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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 Mon Jun 01, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63602720,1sleep00-21swapper/008:09:010
1472626957,8sleep10-21swapper/107:07:301
1448026452,8sleep00-21swapper/007:04:540
127172610,0sleep112718-21sh10:10:511
15035993630,4cyclictest24-21ksoftirqd/111:39:051
15035993610,9cyclictest91rcu_preempt12:00:221
15035993610,7cyclictest91rcu_preempt10:05:531
15034993510,0cyclictest0-21swapper/009:54:340
1503599342,31cyclictest0-21swapper/109:28:471
15035993330,2cyclictest27110-21df07:39:001
15035993330,2cyclictest22245-21apache_processe10:23:591
15035993329,3cyclictest14965-21/usr/sbin/munin10:14:031
15035993328,4cyclictest29163-21ssh09:08:591
15035993314,3cyclictest91rcu_preempt11:24:231
1503599329,2cyclictest91rcu_preempt10:46:211
15035993229,2cyclictest30729-21apache_accesses07:48:591
15035993228,3cyclictest32422-21ntp_kernel_pll_11:19:061
15035993220,7cyclictest1211-21kworker/1:011:54:191
15035993214,9cyclictest24-21ksoftirqd/111:02:271
15035993129,1cyclictest22964-21df_inode07:29:001
15035993129,1cyclictest19374-21python10:19:071
15035993129,1cyclictest14021-21users10:54:091
15035993129,1cyclictest11773-21apache_volume08:24:001
15035993128,2cyclictest7958-21ssh09:23:271
15035993128,2cyclictest25466-21diskstats08:59:001
15035993128,2cyclictest0-21swapper/110:32:521
15035993127,3cyclictest8460-21apache_volume12:13:581
15035993127,3cyclictest0-21swapper/109:59:201
15035993127,3cyclictest0-21swapper/108:29:001
15035993029,1cyclictest15818-21diskstats08:34:011
15035993028,1cyclictest23110-21awk08:53:471
15035993028,1cyclictest10064-21df_inode08:19:001
15035993027,2cyclictest5865-21users12:09:081
15035993027,2cyclictest4337-21uniq08:04:041
15035993027,2cyclictest28958-21latency_hist09:08:471
15035993027,2cyclictest28915-21diskmemload11:30:391
15035993027,2cyclictest28343-21/usr/sbin/munin09:49:031
15035993027,2cyclictest24601-21grep09:44:031
15035993027,2cyclictest20080-21ls07:19:081
15035993027,2cyclictest1746-21seq07:56:171
15035993027,2cyclictest0-21swapper/112:20:241
15035993026,3cyclictest20658-21grep08:44:091
15035993026,3cyclictest20027-21sh12:28:591
15035993024,4cyclictest23578-21perl08:54:021
15035993022,7cyclictest1956-21wc09:14:081
15035993022,4cyclictest24-21ksoftirqd/111:17:571
15035992926,2cyclictest3623-21ssh10:41:091
15035992926,2cyclictest20308-21perl09:39:001
15035992925,3cyclictest0-21swapper/111:11:561
15035992923,5cyclictest30467-21taskset07:47:531
15035992922,6cyclictest26227-21ssh12:36:531
15035992922,6cyclictest21885-21ls11:48:481
15035992919,9cyclictest0-21swapper/112:04:231
15035992826,1cyclictest24-21ksoftirqd/111:37:181
15035992825,3cyclictest28915-21diskmemload10:52:481
15035992825,2cyclictest8066-21expr08:14:011
15035992825,2cyclictest25055-21cpuspeed_turbos07:33:591
15035992824,3cyclictest0-21swapper/109:28:591
15035992824,1cyclictest24-21ksoftirqd/111:52:581
15035992823,4cyclictest0-21swapper/107:18:211
1503499280,20cyclictest0-21swapper/010:15:460
15035992725,2cyclictest0-21swapper/111:05:541
15035992725,2cyclictest0-21swapper/109:37:191
15035992725,1cyclictest17530-21apache_accesses08:38:581
15035992724,2cyclictest6603-21latency08:09:031
15035992724,2cyclictest35342chrt07:59:471
15035992723,3cyclictest16358-21sort12:24:021
15035992718,7cyclictest2408-21ssh09:58:281
15035992623,2cyclictest28915-21diskmemload10:38:341
1503499263,22cyclictest0-21swapper/011:51:180
15035992513,8cyclictest0-21swapper/107:24:211
15034992521,3cyclictest3896-21ssh09:59:060
15034992510,8cyclictest0-21swapper/008:44:000
15034992510,11cyclictest0-21swapper/010:51:520
15035992421,2cyclictest16018-21tr07:09:061
15034992411,9cyclictest100250irq/107-eth1-rx09:49:460
15034992410,10cyclictest0-21swapper/010:46:100
15034992317,5cyclictest7757-21apache207:09:010
15034992311,6cyclictest167-21systemd-journal08:54:060
15034992220,1cyclictest24837-21apache212:29:230
15034992217,3cyclictest0-21swapper/012:16:400
15034992210,9cyclictest0-21swapper/011:42:070
15034992210,5cyclictest0-21swapper/012:24:420
1503499220,20cyclictest0-21swapper/007:34:290
1503499213,16cyclictest0-21swapper/010:10:320
1503499213,10cyclictest0-21swapper/010:24:020
1503499212,7cyclictest0-21swapper/008:04:020
1503499212,14cyclictest0-21swapper/009:39:010
15034992121,0cyclictest0-21swapper/011:22:580
15034992110,5cyclictest32475-21kworker/u4:212:09:500
15034992110,4cyclictest0-21swapper/008:00:320
15034992110,0cyclictest0-21swapper/011:01:580
2852622010,0sleep00-21swapper/010:31:380
1515722010,0sleep00-21swapper/010:56:340
1503499206,10cyclictest0-21swapper/008:59:000
15034992019,1cyclictest319-21rpcbind09:36:090
15034992018,1cyclictest24837-21apache210:36:380
15034992012,4cyclictest0-21swapper/010:06:120
15034992010,4cyclictest0-21swapper/011:35:250
15034992010,1cyclictest0-21swapper/011:30:410
516121910,0sleep00-21swapper/011:25:230
2743321910,1sleep00-21swapper/011:54:380
1503499195,8cyclictest0-21swapper/009:29:070
1503499195,6cyclictest24753-21ls11:09:040
1503499193,8cyclictest0-21swapper/008:24:040
1503499193,14cyclictest862-21ssh12:03:590
15034991917,1cyclictest636-21nscd09:44:310
15034991913,2cyclictest100250irq/107-eth1-rx11:48:100
15034991911,5cyclictest18797-1kworker/u5:012:34:210
15034991910,6cyclictest0-21swapper/009:14:290
15034991910,5cyclictest0-21swapper/007:44:010
15034991910,5cyclictest0-21swapper/007:39:030
15034991910,4cyclictest0-21swapper/009:04:000
1503499190,7cyclictest0-21swapper/011:14:030
1503499190,6cyclictest1199-21runrttasks08:38:460
1503499187,5cyclictest0-21swapper/008:18:590
1503499185,6cyclictest0-21swapper/010:38:580
1503499185,2cyclictest28915-21diskmemload10:19:080
1503499183,10cyclictest0-21swapper/007:48:590
1503499181,9cyclictest0-21swapper/011:04:000
15034991817,0cyclictest0-21swapper/011:59:160
15034991810,3cyclictest0-21swapper/012:18:590
15034991810,3cyclictest0-21swapper/008:49:070
15034991810,0cyclictest0-21swapper/007:29:060
15034991715,2cyclictest15032-21cyclictest09:25:590
15034991713,3cyclictest81ktimersoftd/007:26:210
1503499171,10cyclictest0-21swapper/008:39:070
15034991710,2cyclictest0-21swapper/009:20:320
15034991710,2cyclictest0-21swapper/009:11:130
15034991710,2cyclictest0-21swapper/007:22:590
1503499165,4cyclictest0-21swapper/007:14:100
1503499155,4cyclictest13680-21/usr/sbin/munin08:28:590
1503499153,7cyclictest0-21swapper/007:53:580
15034991510,1cyclictest0-21swapper/008:14:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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