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2026-07-10 - 07:38
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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 Fri Jul 10, 2026 00:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1843022260,19sleep30-21swapper/318:53:043
192229911081,21cyclictest23398-21apt-key20:47:241
192299910848,43cyclictest11085-21ntpd23:47:532
1327821070,4sleep113250-21ssh23:17:201
192299910483,14cyclictest19230-21munin-plugin-st23:27:202
19229991033,85cyclictest4614-21apt-get23:02:342
19229999929,37cyclictest0-21swapper/200:23:282
19213999872,8cyclictest181rcu_preempt22:05:240
19213999872,8cyclictest181rcu_preempt22:05:240
19213999854,10cyclictest181rcu_preempt20:22:350
19213999854,10cyclictest181rcu_preempt20:22:350
19213999853,18cyclictest3909-21ssh23:55:000
182762989,63sleep118282-21/usr/sbin/munin18:52:591
1922999973,52cyclictest0-21swapper/223:12:242
1922999973,52cyclictest0-21swapper/223:12:242
19229999723,45cyclictest18576-21basename22:32:212
19229999522,43cyclictest19200-21cyclictest21:22:242
19229999220,42cyclictest7573-21timerandwakeup19:57:562
19229999220,42cyclictest7573-21timerandwakeup19:57:562
19229999166,17cyclictest10519-21sh00:06:492
1922999915,50cyclictest0-21swapper/222:22:422
19229999147,38cyclictest21805-21interrupts21:42:462
1922999903,53cyclictest352-21runrttasks23:38:242
1922999903,53cyclictest352-21runrttasks23:38:242
1922999903,50cyclictest352-21runrttasks19:47:442
1922999903,49cyclictest2374-21systemd-journal21:27:212
19229999029,31cyclictest0-21swapper/219:47:242
1922999902,52cyclictest28097-21apt-get22:47:322
19222999057,10cyclictest181rcu_preempt21:47:191
1922999893,50cyclictest0-21swapper/222:57:522
1922999893,47cyclictest0-21swapper/222:07:342
19222998963,19cyclictest13491-21apt-get20:17:321
19213998970,13cyclictest13358-21wc21:27:580
19213998860,11cyclictest181rcu_preempt20:43:170
19213998842,33cyclictest20864-21cat00:22:560
1922999872,51cyclictest3185-21unixbench_singl23:53:002
19222998770,13cyclictest19200-21cyclictest23:57:391
19222998770,11cyclictest10570-21fschecks_time20:08:401
19222998769,11cyclictest0-21swapper/121:37:451
19222998762,19cyclictest26202-21latency_hist19:17:241
19229998655,21cyclictest24687-21fschecks_time21:47:432
19213998631,11cyclictest181rcu_preempt22:57:230
180882867,54sleep218103-21kernelversion18:52:522
1922999854,51cyclictest0-21swapper/222:02:232
19229998541,33cyclictest0-21swapper/221:07:382
19222998563,16cyclictest23855-21fschecks_count20:47:551
19222998561,16cyclictest19555-21/usr/sbin/munin23:27:551
19222998556,20cyclictest21556-21apt-key20:42:241
19222998556,20cyclictest21556-21apt-key20:42:241
19213998540,8cyclictest181rcu_preempt19:07:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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