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2026-04-08 - 17:42

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 Wed Apr 08, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2864021230,3chrt28642-21cpu11:15:360
2682821230,2chrt26829-21/usr/sbin/munin12:01:020
267721220,2sleep02678-21runrttasks09:47:450
3208521200,2chrt32086-21runrttasks12:08:570
1384621190,2chrt13729-21apt-get12:30:280
466021180,2chrt4661-21runrttasks12:16:320
220121180,3chrt2203-21runrttasks11:24:450
696121160,3chrt6962-21runrttasks09:54:590
2539121160,2chrt25392-21runrttasks11:58:520
1606321160,2chrt16019-21munin-run09:20:030
1292921160,2chrt12916-21ntpq10:51:200
1654821150,2chrt16547-21mailstats07:36:220
2431621140,2chrt24294-21ntpq09:31:400
1962021140,2chrt19619-21seq07:41:230
59821130,3chrt599-21seq10:33:210
1019921130,1sleep010196-21idleruntime09:11:040
1727721110,2chrt17278-21seq10:57:590
525521090,2sleep05256-21cpuspeed10:40:370
1671421080,2chrt16715-21sh11:46:020
1655821080,2chrt16560-21cpu09:20:380
757621070,1sleep07578-21processes11:32:120
55521060,2chrt556-21sleep08:03:270
2743921060,2chrt27440-21chrt11:13:260
1990221050,2chrt19903-21runrttasks11:01:540
589421040,2chrt5892-21awk07:20:220
1134721040,2chrt11348-21sleep07:28:450
2606221000,1sleep026064-21runrttasks10:22:380
222512980,1sleep022252-21chrt09:28:580
211332980,2sleep021134-21seq11:52:220
26492950,2sleep02652-21sed10:36:130
302902930,2sleep030291-21runrttasks10:29:430
149992930,1sleep014998-21seq08:26:110
299542890,2sleep029956-21cpu09:40:370
107912870,2sleep010793-21cpuspeed12:25:370
244182830,2sleep024419-21seq07:50:110
232952820,1sleep023296-21runrttasks10:19:020
294372780,1sleep029440-21grep09:40:010
261112750,2sleep026113-21grep08:45:050
187812750,1sleep018783-21/usr/sbin/munin10:11:550
142972740,2sleep014298-21chrt11:42:060
117452740,2sleep011747-21seq08:20:570
165712720,2sleep016572-21seq10:08:570
325362700,2sleep032539-21cut07:10:430
93592660,2sleep09361-21ssh11:35:190
130482640,2sleep013049-21chrt10:03:310
32692630,1sleep03270-21/usr/sbin/munin11:26:020
86972620,2sleep08698-21ld12:21:590
72062560,2sleep07207-21seq09:55:160
226032550,2sleep022604-21chrt11:06:050
2868025412,18sleep028654-21apt-get07:05:150
15012530,1sleep01497-21pluginstate08:56:210
53842510,2sleep05385-21runrttasks07:19:280
293212490,2chrt29313-21awk08:50:000
31659904718,21cyclictest0-21swapper10:49:550
277282470,2sleep027729-21stty07:55:240
326812450,3chrt32682-21runrttasks12:10:050
3165990434,11cyclictest17497-21df12:35:430
31659904316,9cyclictest2280-21seq08:05:480
3165990425,9cyclictest3587-21df09:00:280
3165990424,18cyclictest24249-21munin-run07:50:010
31659904215,19cyclictest19938-21apt-get08:35:150
3165990414,11cyclictest6045-21users08:11:300
31659904115,19cyclictest18064-21ntpq08:31:080
3165990403,10cyclictest7857-21diskstats08:15:320
31659904018,16cyclictest0-21swapper07:30:240
31659904014,8cyclictest30530-21ntpq08:50:520
3165990393,11cyclictest7699-21sleep09:06:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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