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2025-12-16 - 01:36
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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