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2025-11-27 - 06:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 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.
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 rack0slot4s.osadl.org (updated Thu Nov 27, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4076201310,109data-loop.00-21swapper/1519:05:387
4076201030,101data-loop.00-21swapper/419:05:1810
4076201030,101data-loop.00-21swapper/319:09:019
407620900,88data-loop.00-21swapper/1019:05:232
408020880,87data-loop.00-21swapper/919:06:0915
408020870,85data-loop.00-21swapper/1419:05:196
407620870,86data-loop.00-21swapper/1119:09:473
407620860,85data-loop.00-21swapper/1219:06:204
407620850,84data-loop.00-21swapper/219:07:088
408020830,81data-loop.00-21swapper/819:05:4414
408020820,81data-loop.00-21swapper/619:05:2212
408020810,80data-loop.00-21swapper/719:08:2013
407620810,80data-loop.00-21swapper/1319:09:055
407620780,76data-loop.00-21swapper/519:05:3311
407620760,75data-loop.00-21swapper/019:08:410
408020750,74data-loop.00-21swapper/119:07:121
2188648995328,25cyclictest0-21swapper/520:09:4411
218864899511,25cyclictest0-21swapper/521:26:3711
2188648994823,25cyclictest0-21swapper/522:43:3011
2188648994823,25cyclictest0-21swapper/522:43:3011
218864899447,0cyclictest0-21swapper/523:27:2611
218864599420,41cyclictest0-21swapper/423:30:4910
2188671993836,1cyclictest2205810-21kworker/u32:2+flush-259:020:10:205
2188656993836,2cyclictest2392265-21kworker/u32:5+events_unbound00:15:1914
218864899380,25cyclictest0-21swapper/519:14:4911
2188656993636,0cyclictest0-21swapper/823:42:5014
2188665993432,2cyclictest2258249-21kworker/u32:0+flush-259:020:50:173
218867799330,32cyclictest0-21swapper/1500:10:147
2188656993333,0cyclictest0-21swapper/821:06:1214
2188656993332,1cyclictest2384139-21kworker/u32:0+events_unbound23:09:5914
2188656993332,1cyclictest2218417-21kworker/u32:3+events_unbound20:00:2314
2188656993332,1cyclictest2186658-21kworker/u32:4+events_unbound20:15:1914
218865499330,30cyclictest0-21swapper/721:05:1513
218864399330,30cyclictest0-21swapper/322:05:159
2188677993230,2cyclictest0-21swapper/1522:57:337
218867199327,25cyclictest2236193-21kworker/u32:1+events_unbound20:42:325
218866999320,31cyclictest477704-21thunderbird23:52:104
218866999320,29cyclictest0-21swapper/1221:55:144
2188656993231,1cyclictest477704-21thunderbird21:44:4814
2188656993231,1cyclictest2354590-21kworker/u32:4+events_unbound22:35:2514
2188656993231,1cyclictest2354590-21kworker/u32:4+events_unbound22:35:2514
218864899327,14cyclictest0-21swapper/521:59:3411
2188648993221,11cyclictest0-21swapper/519:25:4811
2188643993230,2cyclictest2186658-21kworker/u32:4+flush-259:019:35:219
2188643993230,2cyclictest2186658-21kworker/u32:4+flush-259:019:35:209
218863599320,29cyclictest0-21swapper/100:35:171
2188677993129,2cyclictest0-21swapper/1521:27:367
2188677993127,4cyclictest2395797-21snmpd21:57:077
218867799310,30cyclictest0-21swapper/1520:47:057
218867799310,30cyclictest0-21swapper/1520:44:567
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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