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2026-04-23 - 13:35

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 100 highest latencies:
System rack7slot3s.osadl.org (updated Thu Apr 23, 2026 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2707121330,5sleep0288499cyclictest05:36:060
2884999610,24cyclictest0-21swapper/005:05:010
268002950,2sleep3381ktimersoftd/306:45:483
2884998917,8cyclictest0-21swapper/008:20:580
2884998823,49cyclictest908-21runrttasks06:59:110
288499873,26cyclictest0-21swapper/007:16:100
288499831,70cyclictest30931-21ls06:50:480
95052820,4sleep39504-21ssh09:01:043
171432820,2sleep00-21swapper/007:11:300
241182800,6sleep2288699cyclictest06:41:202
2884997716,8cyclictest0-21swapper/009:05:590
2884997630,14cyclictest0-21swapper/009:26:030
2884997621,32cyclictest24242-21sh08:00:470
26452760,5sleep32639-21munin-run04:30:483
288499756,14cyclictest0-21swapper/009:15:530
288499741,4cyclictest29563-21ssh08:46:030
288499736,28cyclictest0-21swapper/006:36:000
288499731,21cyclictest0-21swapper/008:01:190
288499722,28cyclictest0-21swapper/009:11:100
288499721,4cyclictest6397-21ssh09:36:080
288499721,4cyclictest6397-21ssh09:36:080
309522710,1sleep20-21swapper/208:08:012
2884997137,16cyclictest0-21swapper/008:16:000
288499712,19cyclictest0-21swapper/008:40:330
288499711,18cyclictest0-21swapper/009:55:460
288499702,52cyclictest0-21swapper/004:36:010
288499692,20cyclictest31245-21/usr/sbin/munin06:51:080
288499691,28cyclictest0-21swapper/009:55:590
288499691,25cyclictest14954-21ssh06:31:100
288499691,19cyclictest12541-21ssh07:46:060
2884996816,7cyclictest0-21swapper/008:15:260
2884996722,4cyclictest7850irq/56-dwc_otg_08:51:430
288499672,23cyclictest0-21swapper/007:55:440
288499672,22cyclictest0-21swapper/006:14:360
288499672,22cyclictest0-21swapper/006:14:360
288499672,16cyclictest0-21swapper/007:04:410
2886996625,9cyclictest7850irq/56-dwc_otg_06:01:042
2884996621,5cyclictest0-21swapper/005:19:110
2884996612,13cyclictest0-21swapper/006:03:380
288499652,21cyclictest0-21swapper/007:33:300
2884996520,9cyclictest0-21swapper/009:47:010
2884996519,11cyclictest0-21swapper/007:10:310
2884996514,12cyclictest29479-21rm08:06:110
288499651,21cyclictest0-21swapper/005:46:020
277282650,5sleep1288599cyclictest09:22:201
2884996415,14cyclictest0-21swapper/007:27:520
2884996415,14cyclictest0-21swapper/007:27:520
288499641,16cyclictest0-21swapper/007:21:100
197162640,2sleep00-21swapper/008:34:080
288499632,21cyclictest0-21swapper/006:25:350
288499632,15cyclictest0-21swapper/007:36:130
288499631,30cyclictest0-21swapper/006:17:210
288499631,20cyclictest25824-21ssh09:20:590
288699622,19cyclictest7950irq/56-dwc_otg_07:56:002
288499622,19cyclictest0-21swapper/004:56:010
288499622,19cyclictest0-21swapper/004:56:010
28732620,1sleep00-21swapper/004:30:490
28732620,1sleep00-21swapper/004:30:490
2884996130,22cyclictest7850irq/56-dwc_otg_05:25:470
288499612,17cyclictest0-21swapper/009:42:000
2884996115,10cyclictest0-21swapper/009:30:590
2884996114,11cyclictest0-21swapper/006:42:460
288499595,9cyclictest0-21swapper/008:40:590
288499591,25cyclictest0-21swapper/005:40:580
288499591,14cyclictest0-21swapper/008:26:170
288499579,5cyclictest0-21swapper/004:50:590
247425711,6sleep00-21swapper/004:28:590
38452560,2sleep30-21swapper/308:15:153
288699566,13cyclictest8596-21ssh08:20:582
288799554,17cyclictest19815-21diskmemload07:15:593
288699558,19cyclictest0-21swapper/206:11:002
288699558,19cyclictest0-21swapper/206:11:002
288699554,6cyclictest9278-21ssh09:01:012
2884995525,2cyclictest0-21swapper/007:40:540
288499542,30cyclictest18649-21sed05:11:160
95692530,2sleep19568-21unixbench_singl04:46:151
288699531,10cyclictest28055-21ssh07:26:002
288699531,10cyclictest28055-21ssh07:26:002
288699521,12cyclictest7950irq/56-dwc_otg_04:45:592
288599523,7cyclictest0-21swapper/105:01:001
288499522,37cyclictest26533-21latency_hist05:35:480
288499511,28cyclictest9910-21missed_timers09:01:100
230792510,5sleep3288799cyclictest07:58:403
288699507,7cyclictest7950irq/56-dwc_otg_08:35:592
288699503,7cyclictest0-21swapper/208:41:002
288499507,22cyclictest5731-21wc08:56:080
288499502,27cyclictest8757-21fschecks_time04:46:050
288699491,8cyclictest7750irq/56-dwc_otg09:41:002
288499496,29cyclictest0-21swapper/005:56:010
288699487,25cyclictest0-21swapper/204:36:002
2885994827,13cyclictest7850irq/56-dwc_otg_09:11:011
2884994821,18cyclictest0-21swapper/005:10:120
2884994816,16cyclictest12617-21fschecks_count06:26:050
288699474,6cyclictest7950irq/56-dwc_otg_05:26:012
288699467,25cyclictest0-21swapper/205:41:012
288699465,9cyclictest0-21swapper/206:31:012
26732460,5sleep2288699cyclictest09:31:152
288799457,26cyclictest0-21swapper/306:26:013
288699457,24cyclictest0-21swapper/205:46:002
288699452,6cyclictest0-21swapper/205:31:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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