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2026-07-10 - 11:10
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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 100 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
19229998444,32cyclictest0-21swapper/223:17:232
1922999843,48cyclictest22739-21ssh23:32:402
19222998462,15cyclictest6256-21sh21:17:241
19222998459,18cyclictest6783-21latency_hist22:12:231
1922999834,64cyclictest18531-21grep20:32:412
1922999834,64cyclictest18531-21grep20:32:412
1922999833,49cyclictest19434-21netstat22:32:502
19213998362,15cyclictest19200-21cyclictest22:51:170
1922999823,69cyclictest21791-21apt-get20:42:342
1922999823,67cyclictest14208-21/usr/sbin/munin23:17:522
1922999823,67cyclictest14208-21/usr/sbin/munin23:17:522
1922999823,59cyclictest23663-21apt-get20:47:352
1922999822,45cyclictest26540-21seq20:56:372
1922999822,45cyclictest26540-21seq20:56:372
19222998263,14cyclictest19200-21cyclictest20:12:431
19213998260,16cyclictest6158-21idleruntime-cro21:17:200
19213998257,13cyclictest0-21swapper/021:07:560
19213998244,8cyclictest181rcu_preempt18:57:380
19213998244,8cyclictest181rcu_preempt18:57:380
19213998239,13cyclictest32126-21ssh21:59:480
19229998134,38cyclictest12175-21sort20:12:442
1922999812,72cyclictest9914-21ssh22:17:362
1922999812,72cyclictest9914-21ssh22:17:362
19229998124,25cyclictest0-21swapper/220:17:422
19222998161,14cyclictest8787-21ssh21:21:261
19222998159,16cyclictest19200-21cyclictest20:57:361
19222998159,16cyclictest0-21swapper/119:32:481
19222998155,10cyclictest181rcu_preempt23:32:321
19213998157,17cyclictest4997-21latency_hist19:52:230
19213998155,17cyclictest22191-21fschecks_time22:37:440
19213998138,8cyclictest181rcu_preempt23:18:240
19213998138,8cyclictest181rcu_preempt23:18:240
19213998136,11cyclictest181rcu_preempt23:12:460
19213998128,16cyclictest181rcu_preempt19:37:200
185002819,38sleep00-21swapper/018:53:060
1922999804,47cyclictest0-21swapper/222:37:562
19229998039,35cyclictest0-21swapper/221:27:572
1922999803,64cyclictest18636-21ssh00:19:222
1922999803,64cyclictest18636-21ssh00:19:222
19222998059,15cyclictest300-21rs:main1
19222998058,15cyclictest19200-21cyclictest19:02:401
1922299802,40cyclictest27530-21apt-get22:47:371
19213998039,8cyclictest181rcu_preempt23:42:240
19213998039,8cyclictest181rcu_preempt23:42:240
19213998028,24cyclictest181rcu_preempt21:32:570
1922999794,56cyclictest27935-21apt-get19:22:322
1922999794,56cyclictest27935-21apt-get19:22:322
1922999793,45cyclictest1470-21seq19:40:032
19229997930,43cyclictest0-21swapper/220:05:212
19229997930,43cyclictest0-21swapper/220:05:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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