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2026-04-21 - 22:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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  Phytec
Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rackbslot5s.osadl.org (updated Tue Apr 21, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3802412995240,8cyclictest3828271-21grep08:20:240
3802425994739,5cyclictest3878428-21ls10:50:003
3802425994735,9cyclictest391ktimers/308:30:143
3802420994637,5cyclictest0-21swapper/209:10:002
3802412994534,7cyclictest0-21swapper/011:20:010
3802412994534,6cyclictest0-21swapper/011:25:260
3802425994437,4cyclictest3881819-21apt-get11:00:003
3802420994435,7cyclictest3874829-21kworker/u8:1+events_unbound10:44:582
3802420994331,9cyclictest311ktimers/208:10:112
3802412994337,4cyclictest3840677-21sh09:00:000
3802412994335,6cyclictest3877144-21fschecks_time10:45:160
3802417994229,9cyclictest3833888-21cat08:40:001
3802420994130,7cyclictest3893553-21grep11:30:242
3802420994130,7cyclictest3813172-21grep07:40:012
3802420994129,8cyclictest3865994-21grep10:10:242
3802420994117,12cyclictest0-21swapper/211:24:322
3802412994132,5cyclictest0-21swapper/012:20:000
3802412994132,5cyclictest0-21swapper/012:20:000
3802412994121,17cyclictest3854323-21sh09:40:000
3802420994027,4cyclictest131rcu_preempt12:19:292
3802420994027,4cyclictest131rcu_preempt12:19:282
3802417994032,5cyclictest3806358-21idleruntime-cro07:20:011
3802412994033,4cyclictest3886699-21unixbench_multi11:10:240
3802412994033,4cyclictest3885450-21latency_hist11:10:000
3802420993931,6cyclictest3871402-21kworker/u8:2+events_unbound10:39:582
3802420993929,5cyclictest0-21swapper/207:55:022
3802420993928,7cyclictest0-21swapper/212:05:002
3802420993917,11cyclictest0-21swapper/209:46:342
3802417993931,4cyclictest0-21swapper/110:19:521
3802412993928,7cyclictest0-21swapper/012:00:110
3802425993829,4cyclictest0-21swapper/307:15:023
3802420993832,4cyclictest3859291-21kworker/u8:3+events_unbound10:04:532
3802420993821,5cyclictest3859291-21kworker/u8:3-events_freezable_power_10:34:102
3802417993830,4cyclictest0-21swapper/107:29:271
3802417993829,5cyclictest0-21swapper/111:30:151
3802417993829,5cyclictest0-21swapper/108:55:261
3802417993827,7cyclictest3857268-21grep09:45:261
3802412993827,8cyclictest3813168-21cron07:40:020
3802412993824,10cyclictest121ktimers/012:35:150
3802425993726,7cyclictest3806366-21sendmail07:20:013
3802420993727,4cyclictest0-21swapper/209:05:002
3802420993725,9cyclictest311ktimers/212:05:122
3802420993724,9cyclictest3911028-21sh12:24:592
3802420993724,9cyclictest311ktimers/210:20:122
3802420993722,4cyclictest131rcu_preempt12:10:162
3802420993628,4cyclictest3820215-21sendmail08:00:012
3802420993620,5cyclictest131rcu_preempt11:13:052
3802420993618,10cyclictest131rcu_preempt11:00:242
3802420993618,10cyclictest131rcu_preempt11:00:232
3802420993615,10cyclictest0-21swapper/211:06:082
3802417993625,7cyclictest0-21swapper/108:15:251
3802412993629,4cyclictest0-21swapper/009:50:250
3802412993627,6cyclictest3914027-21unixbench_singl12:30:260
3802412993626,6cyclictest0-21swapper/009:45:250
3802425993528,4cyclictest3829977-21unixbench_multi08:25:263
3802420993529,4cyclictest3826962-21kworker/u8:2+events_unbound08:19:362
3802420993527,4cyclictest0-21swapper/210:50:262
3802420993527,4cyclictest0-21swapper/208:35:002
3802420993520,4cyclictest131rcu_preempt07:45:582
3802420993520,3cyclictest131rcu_preempt07:24:322
3802420993519,4cyclictest131rcu_preempt11:49:272
3802420993517,10cyclictest131rcu_preempt12:28:302
3802420993516,5cyclictest131rcu_preempt09:10:172
3802420993515,12cyclictest131rcu_preempt08:25:152
3802412993527,5cyclictest3905915-21ls12:10:010
3802412993525,6cyclictest0-21swapper/010:00:250
3802420993428,4cyclictest3898732-21kworker/u8:1+events_unbound11:53:422
3802420993427,5cyclictest3850577-21kworker/u8:2+events_unbound09:36:412
3802420993426,4cyclictest0-21swapper/211:15:152
3802420993423,7cyclictest3895244-21grep11:35:262
3802420993421,5cyclictest131rcu_preempt08:45:222
3802420993421,5cyclictest131rcu_preempt08:45:212
3802417993427,4cyclictest0-21swapper/109:50:261
3802417993423,8cyclictest3898697-21grep11:45:251
3802412993426,5cyclictest0-21swapper/010:10:000
3802412993423,6cyclictest0-21swapper/012:25:260
380242599338,4cyclictest3904206-21apt12:05:003
3802425993326,4cyclictest0-21swapper/308:45:163
3802425993326,4cyclictest0-21swapper/308:45:153
3802425993323,6cyclictest0-21swapper/310:10:003
3802425993323,6cyclictest0-21swapper/308:55:003
3802420993327,4cyclictest3859291-21kworker/u8:3+events_unbound10:28:422
3802420993322,4cyclictest131rcu_preempt12:30:272
3802420993321,4cyclictest131rcu_preempt10:07:442
3802420993321,4cyclictest131rcu_preempt09:54:092
3802420993320,4cyclictest131rcu_preempt07:31:222
3802420993319,5cyclictest131rcu_preempt08:56:012
3802420993319,4cyclictest131rcu_preempt09:18:422
3802420993318,4cyclictest131rcu_preempt11:25:092
3802420993316,5cyclictest3854156-21kworker/u8:0-events_unbound10:19:212
3802420993315,5cyclictest131rcu_preempt08:20:242
3802420993315,4cyclictest0-21swapper/207:27:092
3802420993314,11cyclictest131rcu_preempt11:55:262
3802417993326,4cyclictest0-21swapper/111:15:251
3802417993324,5cyclictest0-21swapper/109:09:421
3802417993323,6cyclictest3907183-21head12:10:241
3802417993323,6cyclictest0-21swapper/112:20:001
3802417993323,6cyclictest0-21swapper/112:20:001
3802412993325,5cyclictest3823610-21cron08:10:010
3802412993324,7cyclictest3899515-21fschecks_time11:50:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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