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2026-04-16 - 23:37
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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 rackdslot0.osadl.org (updated Thu Apr 16, 2026 12:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10739992610,1cyclictest21-21ksoftirqd/108:58:251
1073999240,21cyclictest26997-21grep10:30:161
1073999240,19cyclictest17228-21grep11:10:161
1074599236,11cyclictest0-21swapper/211:54:252
1074599214,16cyclictest0-21swapper/208:01:512
1074599212,16cyclictest8828-21fschecks_count10:55:152
1073999212,18cyclictest16076-21perf07:20:011
1073999210,17cyclictest0-21swapper/112:22:021
1073999202,15cyclictest0-21swapper/112:00:491
10739992017,2cyclictest0-21swapper/107:45:181
10739992017,2cyclictest0-21swapper/107:45:171
10739992016,3cyclictest0-21swapper/109:37:201
1073999200,19cyclictest17766-21latency_hist10:15:011
1074599193,15cyclictest31450-21smtpd08:41:012
1074599192,1cyclictest0-21swapper/211:35:142
10745991917,1cyclictest0-21swapper/211:02:342
1073999192,16cyclictest880-21rs:main1
1073999192,16cyclictest20460-21apache208:25:011
1073999192,16cyclictest0-21swapper/111:41:101
1073999192,16cyclictest0-21swapper/111:41:101
10739991917,1cyclictest0-21swapper/110:24:051
10739991916,2cyclictest30816-21cpuspeed_turbos09:40:131
10739991915,1cyclictest0-21swapper/111:20:011
10739991914,4cyclictest0-21swapper/110:36:541
1073999190,3cyclictest0-21swapper/107:52:291
1073399192,16cyclictest13714-21nfsd412:00:170
1073399190,5cyclictest0-21swapper/012:15:520
1074599182,15cyclictest9161-21taskset09:57:032
1074599182,15cyclictest24831-21nfsd412:20:182
1074599182,15cyclictest0-21swapper/210:13:172
1074599182,15cyclictest0-21swapper/208:56:372
1074599181,16cyclictest14557-21chrt12:01:502
1074599180,17cyclictest18134-21cpuspeed_turbos08:20:142
1074599180,16cyclictest19722-21cpuspeed_turbos09:20:132
1073999182,1cyclictest31335-21timerwakeupswit08:40:221
1073999182,1cyclictest3032-21sed09:45:211
1073999182,15cyclictest0-21swapper/107:30:411
10739991816,1cyclictest0-21swapper/112:19:141
10739991815,2cyclictest0-21swapper/110:45:201
10739991815,1cyclictest0-21swapper/112:37:481
10739991814,3cyclictest20169-21grep09:20:141
1073999181,2cyclictest24617-21latency10:25:171
1073999181,16cyclictest28905-21sed12:30:011
1073999181,16cyclictest23102-21cat11:20:181
1073999181,16cyclictest11521-21cstates09:05:141
1073999180,3cyclictest4190-21cstates11:45:141
1073999180,17cyclictest26739-21/usr/sbin/munin11:25:231
1073999180,16cyclictest0-21swapper/110:18:521
1073399182,15cyclictest0-21swapper/008:12:380
1073399180,3cyclictest2007-21systemd-journal11:08:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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