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2026-08-14 - 08:07

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 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.

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 all highest latencies:
System rackfslot4s.osadl.org (updated Fri Aug 14, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1056722370,2sleep010566-21seq19:05:200
2873421240,3chrt28735-21chrt22:55:040
360121200,2chrt3594-21awk23:55:000
2177821200,3chrt21779-21runrttasks23:32:430
2497121190,3chrt24972-21runrttasks21:12:040
2433021190,3chrt24331-21runrttasks22:48:070
319421170,2chrt3190-21aten2.4-expect23:05:330
913421150,3chrt9135-21sleep21:36:370
2329921140,3chrt21144-21/usr/sbin/munin21:58:010
1485921140,3chrt13574-21apt-get00:11:360
1743821120,3chrt17439-21sh00:15:340
1442521110,3chrt14426-21sleep20:02:530
1080221100,2sleep010804-21cpu00:05:390
3241621090,3chrt32417-21seq23:49:170
3237521090,3chrt32376-21chrt19:40:200
3108221080,3chrt31083-21cut22:10:050
152121080,2chrt1522-21chrt21:25:420
2177321070,2chrt21775-21grep00:21:190
431521060,3chrt4316-21runrttasks22:17:590
1508521060,2chrt15086-21ssh23:22:350
1175221040,2chrt11753-21sleep19:59:090
2004221020,2chrt20043-21sh22:41:320
300322960,2sleep030033-21chrt00:33:500
231172950,2sleep023119-21cut23:35:320
146622850,2sleep014663-21ssh22:33:510
246032830,2sleep024606-21grep00:25:560
302442800,4chrt30228-21ntpq19:35:530
184392770,2sleep018440-21ld21:01:170
197342760,2sleep019735-21seq20:11:100
112332760,2sleep011235-21seq23:17:010
151142720,2sleep015115-21chrt20:55:590
109512720,2sleep010952-21seq20:50:200
21752710,2sleep02176-21cat20:35:420
176512650,2sleep017652-21sh23:26:330
167522640,2sleep016753-21chrt22:36:380
113482610,1sleep011347-21seq22:28:510
87222590,1sleep08723-21sh23:13:200
13299905827,21cyclictest25963-21ntp_states20:21:110
13299905724,13cyclictest28783-21/usr/sbin/munin22:55:430
13299905626,22cyclictest24316-21kworker/u2:322:12:160
13299905625,23cyclictest26777-21/usr/sbin/munin21:16:020
237202550,1sleep023724-21chrt20:17:510
13299905527,20cyclictest27896-21python319:32:170
13299905526,19cyclictest4686-21/usr/sbin/munin20:41:260
245162540,1sleep024517-21seq22:00:080
148192540,2sleep014822-21grep19:11:230
13299905432,14cyclictest3399-21fschecks_count19:45:350
13299905429,17cyclictest27818-21/usr/sbin/munin20:26:230
13299905421,13cyclictest8407-21ntpq00:01:290
43202530,2sleep04362-21rm23:55:500
13299905322,22cyclictest31756-21ntp_states21:21:530
13299905322,22cyclictest20007-21chrt19:20:280
13299905322,22cyclictest18146-21df21:50:430
13299905322,22cyclictest1103-21awk23:01:390
13299905322,21cyclictest7111-21runrttasks21:34:010
13299905321,13cyclictest11538-21ssh21:40:470
13299905222,21cyclictest14736-21ssh21:45:390
13299905221,22cyclictest439-21sh22:21:060
13299905220,23cyclictest17586-21ntpq19:15:550
13299905219,12cyclictest32298-21ntpq00:36:580
13299905125,18cyclictest26280-21sh23:40:100
13299905124,20cyclictest7315-21runrttasks20:45:580
13299905123,10cyclictest24012-21ntp_states19:26:130
13299905120,21cyclictest23170-21ssh21:10:050
13299905026,16cyclictest15368-21apt-get20:05:160
13299905024,18cyclictest32220-21ntp_states20:31:180
13299905023,16cyclictest6060-21apt-get19:50:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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