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2025-07-12 - 12:46
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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 rackcslot4.osadl.org (updated Sat Jul 12, 2025 00:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21713532260186,25sleep10-21swapper/119:06:001
21715492257181,61sleep00-21swapper/019:08:060
2171839991270,121cyclictest2243542-21sshd21:40:221
2171839991260,120cyclictest2212614-21cpuspeed20:50:151
21718399912396,22cyclictest2296879-21kworker/u8:223:21:221
2171837991231,115cyclictest2278976-21apt-key22:30:030
2171839991211,114cyclictest2337203-21cpuspeed_turbos23:50:281
2171837991190,112cyclictest2284049-21xargs22:35:270
2171839991171,110cyclictest2270493-21sshd22:17:221
2171839991170,111cyclictest2274654-21sh22:24:171
2171837991170,111cyclictest2335288-21sh23:47:460
2171837991150,109cyclictest2236113-21latency21:30:200
21718399911453,48cyclictest2294549-21kworker/u8:123:13:421
2171839991131,106cyclictest2218923-21cpuspeed21:05:161
21718379911265,42cyclictest2231928-21ssh21:25:120
2171839991100,104cyclictest2289619-21sh22:44:591
2171839991091,101cyclictest2186566-21idleruntime-cro19:45:001
2171839991090,104cyclictest2190152-21switchtime19:50:251
2171837991090,103cyclictest2336767-21apt-key23:50:030
2171837991070,101cyclictest2261105-21cpu22:05:150
21718399910551,44cyclictest2294549-21kworker/u8:123:49:451
2171839991050,99cyclictest2196368-21sshd20:06:241
2171837991050,99cyclictest2244480-21sh21:41:030
2171839991040,98cyclictest2294485-21open_inodes22:50:261
2171839991040,97cyclictest2266964-21sh22:12:301
2171837991040,98cyclictest2223736-21sh21:13:360
2171837991030,97cyclictest2355979-21sh00:16:140
21718399910238,51cyclictest2294549-21kworker/u8:123:44:421
2171839991020,96cyclictest2344842-21sh00:00:231
2171837991010,95cyclictest2289130-21sh22:43:520
2171839991000,94cyclictest2220875-21sh21:10:121
2171839999952,42cyclictest2296879-21kworker/u8:223:25:111
2171839999943,51cyclictest2294549-21kworker/u8:100:08:121
217183999990,81cyclictest2258914-21unixbench_multi22:00:291
2171839999843,43cyclictest2294549-21kworker/u8:122:59:521
2171839999843,39cyclictest2296879-21kworker/u8:223:03:181
2171839999752,40cyclictest2294549-21kworker/u8:123:39:321
217183999970,91cyclictest2236187-21sh21:30:211
217183999970,91cyclictest2194514-21sshd20:02:231
217183999970,90cyclictest2247288-21mailstats21:45:241
217183799960,90cyclictest2212943-21gltestperf20:50:190
2171839999552,38cyclictest2285024-21ssh22:37:241
217183799950,89cyclictest2219285-21hwlatdetect21:05:180
217183999930,87cyclictest2211090-21if_enp2s020:45:201
217183799930,90cyclictest2188640-21latency_hist19:50:010
217183799930,87cyclictest2347322-21sh00:04:360
217183999920,86cyclictest2289988-21cpuspeed_turbos22:45:151
2171839999031,47cyclictest2361217-21idleruntime-cro00:24:591
2171839998942,42cyclictest2294549-21kworker/u8:123:56:331
217183999892,76cyclictest2234367-21sh21:28:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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