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2026-06-27 - 15:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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 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
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rackfslot4s.osadl.org (updated Sat Jun 27, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1345121320,2sleep013453-21cut22:20:550
1177521270,3chrt11776-21sleep19:46:280
551121230,3chrt5513-21run-parts19:36:240
876421200,3chrt8766-21runrttasks00:39:430
2718821160,2chrt27187-21/usr/sbin/munin20:11:240
2034021150,3chrt20341-21sleep00:07:300
434021140,3chrt4338-21grep22:55:490
2760421130,2chrt27606-21latency_hist21:05:030
3046621120,3chrt30467-21sh00:22:510
3035921120,2chrt30360-21cat22:46:030
60021090,2sleep0601-21seq23:38:180
189821090,2chrt1899-21sleep22:51:440
1005321090,2chrt10054-21runrttasks23:52:240
2553221070,2sleep025533-21fschecks_time00:15:530
2327521060,2sleep023276-21seq21:46:420
1124521050,2chrt11246-21sleep21:29:110
2813121020,3chrt28132-21sh21:54:330
213462990,2sleep021347-21chrt21:44:180
71202960,1sleep07122-21irqrtprio22:11:080
144222950,2sleep014425-21fschecks_count23:10:490
288702930,2sleep028872-21cpu21:55:390
289572920,2sleep028958-21chrt22:43:570
173192890,2sleep017320-21basename22:26:450
111282870,2sleep011127-21ntpq22:17:090
251472850,1sleep025148-21if_eth123:26:480
79292840,2sleep07930-21seq23:49:330
199662840,2sleep019968-21grep20:51:280
55432830,2sleep05544-21sh22:09:090
156572820,2sleep015656-21grep21:35:530
29552810,3sleep02956-21chrt23:41:390
226892780,2sleep022690-21chrt20:05:120
128482770,2sleep012849-21ld23:56:180
219152740,1sleep021917-21aten2.4_rfpower00:10:350
128812710,2sleep012882-21cat20:40:430
324652700,1sleep032468-21cut00:26:060
56722630,1sleep05675-21fschecks_count21:20:530
10832630,2sleep01084-21chrt22:02:070
37842600,1sleep03785-21cat21:17:290
260212580,2sleep026022-21seq19:17:570
28362570,1sleep02837-21seq20:25:040
182332570,1sleep018234-21ls20:50:010
157382553,44sleep015765-21if_eth200:01:020
171182540,2sleep017119-21if_eth119:55:430
231782530,2sleep023218-21cut22:35:330
216222533,40sleep021685-21runrttasks20:55:250
309772513,7sleep030978-21ssh21:10:310
232302513,6sleep023236-21sleep23:23:580
299942503,40sleep029998-21chrt23:33:550
215882502,41sleep021610-21ssh22:32:240
20613905017,24cyclictest0-21swapper23:07:560
20613904918,22cyclictest0-21swapper23:04:320
131712492,6sleep013159-21ssh21:31:370
28062480,2sleep02808-21cpu00:30:360
314202473,36sleep031421-21ntpq19:26:020
181282470,2sleep018186-21if_eth019:05:310
139262470,3chrt13925-21/usr/sbin/munin19:50:390
81972450,2chrt8198-21sh20:33:050
290632440,3chrt29065-21sh19:22:190
280452440,3chrt28046-21cpuspeed21:05:270
20613904320,15cyclictest0-21swapper19:10:320
20613904314,22cyclictest0-21swapper23:17:410
20613904314,22cyclictest0-21swapper19:30:070
2061390416,9cyclictest10103-21ntpq20:35:520
20613904116,17cyclictest19660-21aten2.4_rfpower20:00:230
20613904111,21cyclictest0-21swapper20:15:110
2061390404,17cyclictest32663-21df20:20:450
20613903913,7cyclictest8414-21ntp_states19:41:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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