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2025-12-08 - 13:37
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot7.osadl.org (updated Mon Dec 08, 2025 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18346212943,56sleep118396-21sensors_temp19:04:041
18346212943,56sleep118396-21sensors_temp19:04:041
1880121196,15sleep00-21swapper/019:05:250
1880121196,15sleep00-21swapper/019:05:250
191989911695,14cyclictest31186-21apt-key19:43:242
19178991169,52cyclictest15597-21apt-get22:38:350
19178991169,52cyclictest15597-21apt-get22:38:350
191899910727,27cyclictest0-21swapper/120:18:341
19178991068,26cyclictest181rcu_preempt22:28:380
191789910347,12cyclictest181rcu_preempt21:33:210
19178991023,88cyclictest22556-21apt-get20:54:000
1917899992,72cyclictest10987-21sh00:23:360
19198999820,42cyclictest27278-21sh22:03:322
19189999730,32cyclictest24267-21runrttasks22:53:341
19178999752,23cyclictest181rcu_preempt21:58:240
1917899973,65cyclictest29239-21latency_hist23:58:240
1917899973,65cyclictest29239-21latency_hist23:58:240
183982979,62sleep218460-21sed19:04:052
183982979,62sleep218460-21sed19:04:052
1919899962,47cyclictest21293-21apt-get21:53:322
19189999527,29cyclictest0-21swapper/122:58:361
19198999451,35cyclictest0-21swapper/221:08:492
19198999437,35cyclictest19167-21cyclictest23:33:202
1917899943,83cyclictest207-21systemd-journal20:23:550
1918999934,80cyclictest31388-21apt-get19:43:411
19189999340,23cyclictest0-21swapper/100:24:231
19189999333,22cyclictest3580-21seq23:13:391
19189999331,23cyclictest20798-21runrttasks21:52:511
19189999330,29cyclictest1535-21runrttasks19:49:001
19189999226,27cyclictest12721-21ssh21:38:371
19178999258,13cyclictest181rcu_preempt20:28:520
19189999133,27cyclictest20668-21seq20:48:331
19178999141,13cyclictest181rcu_preempt19:23:220
19198999075,8cyclictest0-21swapper/222:33:572
19198999067,12cyclictest0-21swapper/222:08:532
19189999025,26cyclictest355-21runrttasks00:01:161
19178999041,8cyclictest181rcu_preempt21:59:500
1919899893,48cyclictest15522-21ssh00:31:312
19189998930,26cyclictest7904-21seq23:20:281
19189998929,23cyclictest22438-21seq19:14:381
19189998928,22cyclictest18407-21seq00:37:231
19178998971,11cyclictest4538-21unixbench_multi22:18:580
19178998971,11cyclictest4538-21unixbench_multi22:18:580
19198998849,32cyclictest0-21swapper/222:39:502
19198998849,32cyclictest0-21swapper/222:39:502
1919899883,45cyclictest8683-21seq21:31:112
1919899882,50cyclictest15006-21seq20:29:422
19189998830,20cyclictest1815-21seq23:09:341
19189998829,25cyclictest11238-21seq23:26:481
19189998829,25cyclictest11238-21seq23:26:481
19189998829,22cyclictest29796-21seq22:08:111
19189998827,26cyclictest31247-21runrttasks23:04:111
19189998825,29cyclictest355-21runrttasks21:27:511
1919899873,60cyclictest26839-21modprobe22:58:202
19189998758,20cyclictest20022-21sendmail_mailtr19:09:001
19189998758,20cyclictest20022-21sendmail_mailtr19:09:001
19189998732,23cyclictest24381-21seq21:58:261
19189998730,26cyclictest23161-21seq22:51:021
19189998730,23cyclictest22756-21seq23:46:211
19189998729,21cyclictest19128-21seq20:44:281
19189998729,20cyclictest355-21runrttasks20:58:371
19189998725,26cyclictest12413-21latency_hist21:38:231
19178998765,16cyclictest22272-21apt-key20:53:220
19178998756,22cyclictest20487-21latency_hist20:48:220
19178998746,14cyclictest181rcu_preempt20:08:590
1919899863,47cyclictest3461-21seq19:58:032
19189998628,21cyclictest13989-21seq23:31:221
19189998628,20cyclictest15105-21seq20:31:001
19189998622,28cyclictest2282-21expr19:53:401
19189998620,28cyclictest17683-21runrttasks22:41:551
19189998620,28cyclictest17683-21runrttasks22:41:551
19178998651,11cyclictest181rcu_preempt22:13:430
19198998543,36cyclictest0-21swapper/223:23:202
19189998532,24cyclictest13454-21seq20:25:251
19189998529,20cyclictest6721-21seq20:05:041
19189998528,25cyclictest14898-21seq00:29:201
19189998528,23cyclictest23699-21seq23:48:241
19178998549,12cyclictest181rcu_preempt00:32:240
19178998543,32cyclictest6505-21grep20:04:200
1919899843,44cyclictest18151-21seq00:36:292
1919899842,48cyclictest27323-21seq21:08:172
1919899842,48cyclictest27323-21seq21:08:172
19189998464,14cyclictest207-21systemd-journal23:33:521
19189998426,22cyclictest355-21runrttasks22:25:501
19189998426,22cyclictest355-21runrttasks22:25:501
19189998425,26cyclictest27875-21taskset21:08:421
19178998459,10cyclictest181rcu_preempt22:23:460
19178998459,10cyclictest181rcu_preempt22:23:460
19178998457,13cyclictest181rcu_preempt21:38:060
19178998451,9cyclictest181rcu_preempt21:18:280
19178998451,9cyclictest181rcu_preempt21:18:280
19178998449,13cyclictest181rcu_preempt23:19:070
19178998448,13cyclictest181rcu_preempt00:05:060
19178998443,31cyclictest0-21swapper/022:36:520
19198998363,13cyclictest0-21swapper/220:18:502
1919899835,71cyclictest27177-21apt-get22:58:352
19198998345,34cyclictest19167-21cyclictest21:59:572
1919899834,47cyclictest1794-21seq00:06:312
19198998342,35cyclictest4412-21unixbench_multi23:13:572
1919899832,49cyclictest25817-21seq19:26:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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