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2025-12-15 - 18:07
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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 Mon Dec 15, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
382226957,8sleep00-21swapper/007:08:530
362826949,16sleep10-21swapper/107:06:511
322112580,1sleep132208-21head08:20:171
4113993533,1cyclictest20485-21memory07:50:151
4113993531,3cyclictest30470-21ntp_states09:40:161
4113993531,3cyclictest14994-21grep11:50:121
4113993432,1cyclictest3556-21df_inode11:20:131
4113993432,1cyclictest25826-21diskstats08:05:141
4113993431,2cyclictest11022-21apache_processe11:40:111
4113993430,3cyclictest7286-21/usr/sbin/munin08:40:161
4113993430,3cyclictest2799-21apache_accesses08:30:101
4113993424,9cyclictest30249-21tune2fs11:05:121
4113993331,1cyclictest26632-21ntp_states09:30:161
4113993331,1cyclictest16288-21apache_volume09:05:121
4113993330,3cyclictest9612-21/usr/sbin/munin10:10:181
4113993330,2cyclictest1199-21runrttasks12:18:271
4113993330,2cyclictest0-21swapper/111:35:181
4113993329,3cyclictest5351-21memory08:35:151
4113993329,3cyclictest22772-21sensors_temp07:55:181
4112993332,1cyclictest7-21ksoftirqd/007:55:170
4113993230,2cyclictest13705-21/usr/sbin/munin11:45:181
4113993230,1cyclictest21003-21hddtemp_smartct12:05:141
4113993230,1cyclictest1238-21hddtemp_smartct08:25:131
4113993229,2cyclictest4134-21apache_volume07:10:081
4113993229,2cyclictest19959-21munin-run09:15:001
4113993229,2cyclictest13152-21ntp_states08:55:171
4113993229,2cyclictest1199-21runrttasks12:34:291
4113993229,2cyclictest0-21swapper/111:13:021
4113993229,2cyclictest0-21swapper/110:35:191
4113993228,3cyclictest29493-21ls08:15:111
4113993228,3cyclictest18739-21apache_volume12:00:111
4113993220,11cyclictest5260-21apache_accesses11:25:091
4113993129,2cyclictest0-21swapper/110:44:361
4113993129,2cyclictest0-21swapper/110:07:341
4113993128,2cyclictest9842-21users08:45:211
4113993128,2cyclictest18562-21sh12:00:001
4113993127,3cyclictest0-21swapper/112:35:111
4113993119,11cyclictest9788-21grep07:25:001
4112993111,1cyclictest91rcu_preempt10:39:140
411399309,19cyclictest0-21swapper/110:25:201
4113993027,2cyclictest294362chrt09:39:111
4113993027,2cyclictest20107-21apache_accesses09:15:101
4113993027,2cyclictest0-21swapper/112:25:151
4113993027,2cyclictest0-21swapper/107:27:261
4113993026,4cyclictest0-21swapper/110:21:471
4113993023,5cyclictest25231-21python10:50:211
4113993022,7cyclictest0-21swapper/111:32:531
4112993010,20cyclictest0-21swapper/007:54:110
411399299,3cyclictest0-21swapper/109:52:481
4113992926,2cyclictest0-21swapper/110:30:131
4113992921,7cyclictest29341-21sort08:15:001
4113992826,2cyclictest0-21swapper/109:55:131
4113992826,2cyclictest0-21swapper/109:47:401
4113992826,1cyclictest23910-21df_inode08:00:131
4113992826,1cyclictest22039-21apache_accesses09:20:101
4113992821,5cyclictest0-21swapper/111:18:431
4113992820,7cyclictest11100-21hwlatdetect10:15:131
4113992820,7cyclictest0-21swapper/107:30:371
411299285,3cyclictest91rcu_preempt10:15:150
411299282,3cyclictest91rcu_preempt10:05:180
4113992724,2cyclictest744-21snmpd10:48:141
4113992718,9cyclictest0-21swapper/112:22:121
4113992718,8cyclictest0-21swapper/110:03:491
4112992725,2cyclictest7-21ksoftirqd/007:25:140
411299270,22cyclictest5082-21cat11:24:550
4113992624,2cyclictest0-21swapper/111:00:161
4113992624,2cyclictest0-21swapper/110:56:541
4113992624,2cyclictest0-21swapper/108:52:001
4113992624,2cyclictest0-21swapper/107:15:151
4113992622,3cyclictest23955-21apache_processe09:25:101
4113992618,7cyclictest0-21swapper/112:14:321
4112992626,0cyclictest0-21swapper/012:11:230
411299262,3cyclictest91rcu_preempt07:35:010
4113992422,2cyclictest0-21swapper/107:35:541
4112992424,0cyclictest0-21swapper/008:33:490
4112992422,2cyclictest0-21swapper/008:15:150
411399239,1cyclictest91rcu_preempt09:00:141
4113992320,3cyclictest0-21swapper/107:40:191
411299236,3cyclictest91rcu_preempt08:35:040
4112992322,0cyclictest7-21ksoftirqd/009:50:000
4112992320,2cyclictest13973-21apache210:55:170
4112992317,6cyclictest7-21ksoftirqd/010:45:140
4113992220,2cyclictest0-21swapper/107:46:181
4112992216,5cyclictest18977-21fschecks_count12:00:120
411299221,1cyclictest91rcu_preempt10:02:080
4112992211,11cyclictest0-21swapper/011:07:260
4112992210,2cyclictest7-21ksoftirqd/009:00:140
411299220,3cyclictest91rcu_preempt12:17:590
411299219,6cyclictest22039-21apache_accesses09:20:100
411299216,5cyclictest7-21ksoftirqd/010:52:210
4112992119,2cyclictest0-21swapper/009:58:130
4112992118,2cyclictest28312-21/usr/sbin/munin08:10:160
4112992117,4cyclictest0-21swapper/011:25:130
4112992110,6cyclictest0-21swapper/008:50:200
4112992110,2cyclictest0-21swapper/008:55:200
4112992017,2cyclictest16765-21diskstats10:30:130
4112992016,3cyclictest802-21apache208:44:220
4112992016,3cyclictest29047-21/usr/sbin/munin12:25:160
4112992016,3cyclictest12425-21irqstats07:30:150
4112992012,7cyclictest0-21swapper/011:00:190
4112992010,7cyclictest81ktimersoftd/012:35:160
4112992010,5cyclictest0-21swapper/008:05:160
4112992010,3cyclictest0-21swapper/010:25:160
411299199,9cyclictest0-21swapper/007:40:010
411299194,6cyclictest0-21swapper/011:35:140
411299192,8cyclictest0-21swapper/007:45:090
4112991919,0cyclictest0-21swapper/010:44:320
4112991917,1cyclictest7940-21ntp_states11:30:160
4112991917,1cyclictest11562-21irqstats11:40:150
4112991915,3cyclictest31059-21/usr/sbin/munin12:30:180
4112991915,3cyclictest14996-21tr11:50:120
4112991914,3cyclictest802-21apache209:50:530
4112991911,3cyclictest91rcu_preempt11:15:120
4112991910,6cyclictest0-21swapper/012:05:180
411299190,5cyclictest91rcu_preempt07:19:110
411299190,1cyclictest0-21swapper/010:10:170
411299189,2cyclictest7-21ksoftirqd/009:15:010
4112991816,1cyclictest17353-21irqstats11:55:160
4112991814,3cyclictest16289-21apache_volume09:05:120
4112991810,5cyclictest121rcuc/009:10:200
4112991810,5cyclictest0-21swapper/009:25:110
4112991810,4cyclictest0-21swapper/007:10:160
4112991810,3cyclictest0-21swapper/010:20:110
122821810,0sleep00-21swapper/011:14:550
411299174,10cyclictest0-21swapper/009:40:100
411299173,10cyclictest0-21swapper/011:45:160
4112991713,2cyclictest13973-21apache209:38:330
4112991710,6cyclictest0-21swapper/008:45:140
4112991710,3cyclictest0-21swapper/009:30:180
4112991710,1cyclictest0-21swapper/008:21:090
411299164,7cyclictest0-21swapper/007:20:110
4112991614,1cyclictest27169-21ntp_states12:20:160
4112991613,3cyclictest7-21ksoftirqd/008:02:500
4112991610,3cyclictest0-21swapper/008:28:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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