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2026-09-18 - 15:08
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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 Sep 18, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1552828259,18sleep00-21swapper/019:04:190
1551426855,8sleep10-21swapper/119:04:101
86042660,1sleep00-21swapper/022:57:330
132622640,1sleep10-21swapper/122:16:581
16050993830,3cyclictest29613-21diskmemload23:16:270
16050993731,5cyclictest10365-21ssh22:58:230
16050993533,1cyclictest14138-21df22:18:050
16050993532,3cyclictest22983-21/usr/sbin/munin20:48:100
16050993531,3cyclictest29529-21ssh22:39:270
16050993531,3cyclictest2352-21entropy22:48:060
16050993432,1cyclictest921-21apache_accesses19:53:020
16050993431,2cyclictest4128-21if_eth322:03:070
16050993431,2cyclictest14644-21diskstats20:28:040
16050993331,2cyclictest0-21swapper/023:23:110
16050993331,1cyclictest4741-21apache_volume21:18:030
16050993331,1cyclictest22732-21memory21:43:080
16050993330,2cyclictest7772-21if_eth023:43:060
16050993330,2cyclictest28076-21df_inode21:03:050
16050993330,2cyclictest26786-21/usr/sbin/munin20:58:120
16050993330,2cyclictest26711-21cat19:33:120
16050993330,2cyclictest25268-21sed22:33:140
16050993330,2cyclictest2255-21ssh22:00:170
16050993330,2cyclictest1804-21ssh22:47:380
16050993329,3cyclictest13154-21ssh23:51:000
16050993321,11cyclictest2758-21ssh23:35:400
1605099328,5cyclictest0-21swapper/023:31:300
16050993230,2cyclictest23656-21ssh22:32:000
16050993230,1cyclictest1726-21memory21:13:080
16050993229,2cyclictest4792-21apache_volume20:03:040
16050993229,2cyclictest4188-21fschecks_count23:38:050
16050993229,2cyclictest3743-21ssh00:25:410
16050993229,2cyclictest20056-21cstates19:18:040
16050993229,2cyclictest17892-21latency_hist19:12:520
16050993229,2cyclictest17660-21apache_processe23:58:040
16050993229,2cyclictest17296-21ssh23:08:440
16050993229,2cyclictest11532-21/usr/sbin/munin21:28:060
16050993229,2cyclictest0-21swapper/021:26:090
16050993229,2cyclictest0-21swapper/000:19:220
16050993215,16cyclictest0-21swapper/020:53:060
16050993129,2cyclictest0-21swapper/021:54:280
16050993129,2cyclictest0-21swapper/020:36:210
16050993129,1cyclictest30059-21df21:08:050
16050993128,2cyclictest29613-21diskmemload22:11:060
16050993128,2cyclictest29613-21diskmemload00:28:200
16050993128,2cyclictest10091-21sshd20:15:070
16050993128,2cyclictest0-21swapper/023:22:520
16050993128,2cyclictest0-21swapper/000:03:140
16050993124,6cyclictest20771-21grep20:43:080
16050993123,7cyclictest26224-21chrt00:11:070
16050993028,2cyclictest0-21swapper/021:49:030
16050993028,2cyclictest0-21swapper/020:42:380
16050993028,1cyclictest8438-21apache_volume00:33:040
16050993027,2cyclictest27091-21ssh00:13:020
16050993027,2cyclictest18941-21df_inode21:38:050
16050993027,2cyclictest15592-21turbostat.cron23:07:520
16050993019,10cyclictest0-21swapper/022:23:300
16050992927,1cyclictest7244-21irqstats20:08:070
16050992926,2cyclictest14422-21diskstats23:53:050
16050992920,5cyclictest15680-21if_eth321:33:060
16050992918,10cyclictest0-21swapper/019:43:120
206322280,1sleep10-21swapper/100:02:271
16050992826,2cyclictest0-21swapper/022:13:070
16050992825,2cyclictest4625-21latency_hist20:02:520
16050992825,2cyclictest25093-21chrt19:28:450
1605199274,5cyclictest0-21swapper/122:26:571
16051992719,4cyclictest13715-21apache221:14:431
16050992724,3cyclictest0-21swapper/020:24:110
16051992610,0cyclictest0-21swapper/121:41:051
1605199260,0cyclictest0-21swapper/100:23:051
16050992624,2cyclictest0-21swapper/019:50:040
16050992613,9cyclictest18133-21expr19:13:040
16051992523,1cyclictest0-21swapper/100:30:041
16051992521,4cyclictest13715-21apache223:10:581
16051992521,2cyclictest13715-21apache223:19:151
16050992523,2cyclictest0-21swapper/020:20:580
16050992519,5cyclictest0-21swapper/019:38:050
1605199245,13cyclictest0-21swapper/123:38:111
16051992410,5cyclictest0-21swapper/123:23:031
1605199230,14cyclictest0-21swapper/121:28:081
80822210,0sleep10-21swapper/122:45:091
1605199224,11cyclictest0-21swapper/121:58:121
1605199224,10cyclictest0-21swapper/119:43:141
16051992222,0cyclictest0-21swapper/120:52:251
16051992218,3cyclictest0-21swapper/122:56:031
16051992214,2cyclictest29613-21diskmemload21:44:451
16051992210,5cyclictest0-21swapper/100:15:041
16051992210,2cyclictest0-21swapper/123:03:091
1605199213,1cyclictest0-21swapper/123:14:541
16051992113,3cyclictest100150irq/106-eth1-rx23:48:101
16051992110,7cyclictest0-21swapper/120:24:411
16051992110,6cyclictest0-21swapper/120:43:091
16051992110,5cyclictest0-21swapper/121:27:421
1605199210,15cyclictest0-21swapper/123:28:071
1605099212,10cyclictest0-21swapper/019:23:080
1579822110,2sleep10-21swapper/123:53:521
1605199203,9cyclictest24577-21/usr/sbin/munin00:08:101
1605199202,3cyclictest0-21swapper/122:02:541
16051992019,1cyclictest16048-21cyclictest20:22:511
16051992018,1cyclictest13688-21apache223:35:171
16051992010,7cyclictest0-21swapper/122:48:161
16051992010,7cyclictest0-21swapper/119:53:021
1605199200,0cyclictest0-21swapper/100:19:401
1605199192,8cyclictest18124-21munin-run20:37:521
16051991918,1cyclictest13688-21apache222:08:131
1605199191,1cyclictest1199-21runrttasks20:39:391
16051991911,6cyclictest22570-1kworker/u5:022:34:061
16051991911,2cyclictest0-21swapper/121:48:031
1605199191,10cyclictest9238-21ntp_states00:33:101
16051991910,6cyclictest0-21swapper/123:43:111
16051991910,5cyclictest0-21swapper/120:58:041
16051991910,5cyclictest0-21swapper/100:05:061
16051991910,3cyclictest0-21swapper/121:03:291
16051991910,2cyclictest0-21swapper/119:33:031
16051991910,2cyclictest0-21swapper/119:30:341
1605199190,13cyclictest0-21swapper/122:28:061
1576721910,1sleep10-21swapper/120:28:421
1605199187,9cyclictest0-21swapper/119:13:081
1605199184,8cyclictest0-21swapper/120:03:061
1605199184,5cyclictest9122-21/usr/sbin/munin22:58:051
1605199183,9cyclictest0-21swapper/122:38:051
1605199183,4cyclictest0-21swapper/120:53:121
16051991811,5cyclictest13715-21apache222:20:491
16051991810,0cyclictest0-21swapper/121:10:571
1605199175,9cyclictest7013-21fschecks_time20:08:051
1605199172,7cyclictest0-21swapper/121:18:031
16051991711,5cyclictest0-21swapper/119:08:021
16051991710,4cyclictest0-21swapper/121:54:191
16051991710,3cyclictest0-21swapper/119:18:081
1605199164,5cyclictest0-21swapper/120:13:121
1605199163,6cyclictest1199-21runrttasks21:35:461
1605199162,8cyclictest0-21swapper/119:23:381
1605199161,8cyclictest759-21munin-run19:52:521
1605199155,5cyclictest2884-21/usr/sbin/munin19:58:041
1605199151,9cyclictest0-21swapper/119:38:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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