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2026-04-28 - 15:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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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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 highest latencies:
System rack7slot3s.osadl.org (updated Tue Apr 28, 2026 03:36:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
79952950,3sleep07983-21timerwakeupswit11:51:160
6950997112,55cyclictest0-21swapper/012:26:040
695299675,4cyclictest7850irq/56-dwc_otg_11:56:182
695299675,4cyclictest7850irq/56-dwc_otg_11:56:182
259992640,2sleep026001-21ls12:41:110
695099625,40cyclictest0-21swapper/012:36:010
6950996111,27cyclictest0-21swapper/012:46:200
695299603,16cyclictest20550-21ntp_kernel_pll_12:26:152
695199595,7cyclictest0-21swapper/112:26:051
695299561,6cyclictest11597-21timerandwakeup12:01:212
75202550,5sleep1695199cyclictest11:51:081
695299551,11cyclictest7950irq/56-dwc_otg_12:37:172
695199554,7cyclictest7950irq/56-dwc_otg_12:36:011
695299545,4cyclictest7850irq/56-dwc_otg_12:51:132
695299545,4cyclictest7850irq/56-dwc_otg_12:51:132
695199536,16cyclictest0-21swapper/111:56:041
695199536,16cyclictest0-21swapper/111:56:041
6950995223,16cyclictest0-21swapper/012:32:330
290862521,4sleep00-21swapper/012:51:030
290862521,4sleep00-21swapper/012:51:030
49342513,6sleep10-21swapper/111:45:511
695299503,3cyclictest7750irq/56-dwc_otg11:51:142
6951995020,16cyclictest7850irq/56-dwc_otg_12:01:061
221972500,12sleep37950irq/56-dwc_otg_12:31:123
695199472,14cyclictest7750irq/56-dwc_otg12:32:091
6950994719,16cyclictest16138-21basename12:16:070
6950994718,13cyclictest18792-21timerandwakeup12:21:190
6950994622,5cyclictest7750irq/56-dwc_otg11:56:030
6950994622,5cyclictest7750irq/56-dwc_otg11:56:030
6950994526,5cyclictest14836-21grep12:11:130
66332443,13sleep00-21swapper/011:50:160
6950994320,7cyclictest13568-21grep12:06:200
6951994226,4cyclictest17934-21aten_rbpower_en12:21:051
695399417,21cyclictest0-21swapper/312:11:053
695399411,6cyclictest8567-21systemd11:55:513
695199414,10cyclictest7850irq/56-dwc_otg_12:46:041
695399405,4cyclictest7950irq/56-dwc_otg_12:26:213
695399404,6cyclictest7750irq/56-dwc_otg12:41:053
695199397,23cyclictest0-21swapper/112:51:041
695199397,23cyclictest0-21swapper/112:51:041
695399385,7cyclictest7750irq/56-dwc_otg12:36:173
6952993810,11cyclictest7850irq/56-dwc_otg_12:21:202
695199381,23cyclictest0-21swapper/112:41:051
695099381,20cyclictest25577-21systemd-journal12:03:510
695399374,5cyclictest7950irq/56-dwc_otg_12:06:103
695399371,7cyclictest30241-21unixbench_singl12:51:193
695399371,7cyclictest30241-21unixbench_singl12:51:193
695299353,7cyclictest22206-21cut12:31:122
695199357,15cyclictest0-21swapper/112:16:061
695299346,13cyclictest7950irq/56-dwc_otg_12:46:092
695299342,16cyclictest7850irq/56-dwc_otg_12:06:052
695199336,6cyclictest7950irq/56-dwc_otg_12:11:201
695399321,25cyclictest18720-21switchtime12:21:183
695199321,13cyclictest12923-21grep12:06:111
172452320,2sleep20-21swapper/212:16:212
695399309,4cyclictest7750irq/56-dwc_otg11:56:033
695399309,4cyclictest7750irq/56-dwc_otg11:56:033
695399306,6cyclictest7750irq/56-dwc_otg12:01:173
64822293,20sleep20-21swapper/211:48:192
695399274,10cyclictest7850irq/56-dwc_otg_12:49:373
695299271,11cyclictest7950irq/56-dwc_otg_12:11:192
695399266,5cyclictest7950irq/56-dwc_otg_12:20:203
695299263,10cyclictest7850irq/56-dwc_otg_12:41:102
63702263,15sleep30-21swapper/311:46:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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