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2026-06-24 - 14:22
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7.osadl.org (updated Wed Jun 24, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2510421419,91sleep125123-21fschecks_count18:53:521
26405991223,75cyclictest32613-21apt-get23:38:462
26299211712,65sleep026312-21systemd-run18:58:280
26405991114,52cyclictest23988-21ssh00:18:412
264059910887,15cyclictest5698-21fschecks_time22:53:492
2612721026,16sleep20-21swapper/218:56:422
2640599973,35cyclictest28225-21ssh21:43:412
2639699967,25cyclictest32613-21apt-get23:38:540
26405999540,49cyclictest0-21swapper/222:08:302
26405999540,49cyclictest0-21swapper/222:08:302
2639699943,75cyclictest30602-21apt-get20:48:540
2640599933,37cyclictest11371-21mailstats19:49:092
26405999167,11cyclictest181rcu_preempt20:28:292
26405999167,11cyclictest181rcu_preempt20:28:292
26405999154,26cyclictest0-21swapper/220:48:572
2640599903,36cyclictest32683-21ls19:14:032
2640599903,32cyclictest352-21runrttasks00:12:032
2640599903,32cyclictest21002-21ssh00:13:372
26405999027,55cyclictest0-21swapper/222:23:522
26405999027,55cyclictest0-21swapper/222:23:522
2640599902,38cyclictest14853-21unixbench_multi19:59:032
2640599893,36cyclictest24020-21awk23:23:542
2640599893,36cyclictest24020-21awk23:23:542
2640599893,32cyclictest13902-21latency_hist22:13:312
2640599893,27cyclictest17512-21/usr/sbin/munin23:13:442
26401998974,8cyclictest0-21swapper/122:08:491
26396998913,34cyclictest14100-21apt-get22:13:450
26405998838,43cyclictest27103-21sh00:23:442
26405998834,46cyclictest0-21swapper/223:18:582
2640599883,36cyclictest22157-21latency_hist21:33:302
26405998757,22cyclictest16014-21netstat20:03:512
2640599874,32cyclictest2756-21grep21:54:032
2640599874,32cyclictest2756-21grep21:54:032
2640599874,32cyclictest2412-21/usr/sbin/munin22:48:492
26405998736,43cyclictest0-21swapper/221:23:502
2640599873,36cyclictest17761-21latency_hist00:08:282
26405998730,49cyclictest0-21swapper/222:33:042
26405998729,52cyclictest26384-21cyclictest20:53:562
26405998729,52cyclictest26384-21cyclictest20:53:562
2640599872,34cyclictest2657-21cpu19:23:442
26401998766,16cyclictest17762-21fschecks_count23:13:491
2640599864,32cyclictest26623-21awk20:38:262
2640599863,33cyclictest20152-21sh20:18:272
2640599863,31cyclictest31206-21ssh21:48:382
26405998632,48cyclictest0-21swapper/223:53:532
2640599862,35cyclictest31902-21ssh22:43:382
2640599862,35cyclictest31902-21ssh22:43:382
2640199862,42cyclictest31-21ksoftirqd/120:28:381
2640599854,34cyclictest6253-21cstates23:48:442
2640599854,32cyclictest1235-21cut19:18:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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