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2026-03-15 - 02:48

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 792 highest latencies:
System rackfslot4s.osadl.org (updated Sat Mar 14, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
756221990,2sleep07561-21aten2.4_rfpower07:05:200
118621270,3chrt1184-21ntpq07:45:540
740021250,2chrt7401-21seq12:02:190
488021230,3chrt4881-21sleep11:58:570
731821210,3chrt7314-21pluginstate09:38:010
279321210,2chrt2790-21ssh11:07:370
894521200,2sleep08946-21if_eth208:50:420
3173621200,3chrt31737-21sh08:35:280
2139821180,2sleep021396-21ssh11:35:300
1949621180,2chrt19494-21entropy12:20:510
1175421160,3chrt11760-21cut09:45:000
521521150,2chrt5216-21chrt08:45:180
1921521140,2sleep019216-21seq10:44:030
1085921140,2chrt10861-21grep11:20:070
2344221130,2sleep023443-21chrt10:01:560
2418921120,1sleep024190-21chrt12:27:190
2706621110,2chrt27065-21seq11:43:320
741721100,2chrt7418-21irqstats10:26:080
2585821100,2chrt25859-21sleep09:17:180
1642221100,2chrt16423-21sleep07:19:280
3056521090,3chrt30566-21sh09:24:370
2998321090,2sleep029984-21runrttasks08:31:330
2505421090,2chrt25057-21awk10:52:210
575721040,1sleep05758-21chrt10:24:010
1519021030,2chrt15191-21sleep08:09:150
1096421030,3chrt10965-21runrttasks07:10:310
3181221020,1sleep031816-21sed09:26:040
143612970,2sleep014363-21chrt09:00:020
210382930,2sleep021039-21runrttasks09:58:280
120092930,1sleep012012-21tr10:33:030
319992890,2sleep032000-21chrt10:15:020
221562890,1sleep022157-21chrt08:20:190
66992880,2sleep06700-21runrttasks11:13:210
165212840,1sleep016523-21fschecks_time12:16:280
298842820,1sleep029886-21sort11:00:050
238362800,2sleep023837-21chrt09:14:550
268452790,2sleep026844-21perl07:35:370
168192760,1sleep016818-21ld09:51:560
280632730,1sleep028064-21seq10:08:590
314692710,1sleep031470-21seq12:38:350
326092700,2sleep032610-21rm10:15:440
100352680,1sleep010084-21if_eth008:00:410
263382650,1sleep026340-21if_err_can012:30:590
136192640,2sleep013640-21proc_pri09:47:100
113042630,2sleep011306-21seq11:20:320
299022600,2sleep029903-21runrttasks11:00:060
229822600,1sleep022952-21pluginstate10:50:050
262652583,7sleep026270-21ntpq08:25:550
43912570,3sleep04385-21ssh09:33:470
159372563,8sleep015983-21mailstats09:01:240
180432553,10sleep018051-21seq07:21:080
189382533,8sleep018950-21ntpq09:06:210
130292532,5sleep013000-21ssh12:11:060
200172520,2sleep020018-21seq11:33:000
34022490,2sleep03462-21aten2.4_rfpower07:50:250
297092494,8sleep029712-21ntpq11:47:210
154062480,2sleep015410-21irqrtprio11:26:060
133782460,1sleep013379-21hostname10:35:350
10468904616,11cyclictest10503-21ntpq12:07:050
1046890456,21cyclictest20379-21ntpq08:16:490
238022440,3chrt23804-21aten2.4_rfpower07:31:160
1046890446,10cyclictest464-21ntpq11:51:570
1046890426,9cyclictest21019-21ntpq07:25:560
1046890415,18cyclictest3161-21ntpq08:40:570
1046890395,10cyclictest9249-21latency_hist08:00:030
1046890384,7cyclictest15652-21apt-get08:10:190
10468903712,8cyclictest0-21swapper07:41:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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