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2026-05-28 - 09:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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: 50 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 rack4slot6s.osadl.org (updated Thu May 28, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1650022560,2sleep016496-21ntpq19:25:190
2165721530,2sleep021655-21sendmail_mailtr21:50:250
1886721260,4chrt18865-21df_inode19:35:130
832521240,4chrt8323-21memory23:05:160
2895221230,2sleep028954-21latency_hist22:20:020
2488221170,3chrt24883-21latency_hist00:10:010
686021140,3sleep06875-21awk20:55:000
2384821080,2sleep023849-21modprobe19:55:010
2454321070,2sleep024541-21uptime19:55:260
1254021050,3sleep012612-21users23:20:260
3001621000,3sleep030102-21sed00:30:010
307432930,3sleep030747-21ntpq20:20:230
277802920,2sleep027777-21cat00:20:190
7782800,3sleep0774-21find22:35:240
161802800,3chrt16177-21cat19:25:010
44582796,62sleep04482-21df20:45:110
1130127420,31sleep011335-21ntp_states19:05:190
124842660,2sleep012483-21interrupts19:10:150
40902622,5sleep00-21swapper20:43:170
12254996234,17cyclictest20441-21/usr/sbin/munin19:40:240
12254996135,16cyclictest694-21/usr/sbin/munin20:30:160
12254996121,14cyclictest21080-21/usr/sbin/munin23:55:200
12254996112,15cyclictest2026-21memory20:35:190
257532600,3sleep025797-21timerandwakeup20:00:280
12254996034,18cyclictest18621-21latency_hist21:40:010
12254996034,16cyclictest29257-21/usr/sbin/munin20:15:140
1225499598,18cyclictest9595-21/usr/sbin/munin21:05:280
1225499598,18cyclictest10889-21/usr/sbin/munin21:10:270
12254995934,15cyclictest13392-21/usr/sbin/munin23:25:140
12254995932,18cyclictest22648-21runrttasks21:55:160
12254995910,16cyclictest15544-21seq23:33:220
1225499587,17cyclictest5537-21/usr/sbin/munin22:55:230
1225499587,16cyclictest23811-21/usr/sbin/munin22:00:240
1225499586,16cyclictest30128-21/usr/sbin/munin00:30:310
12254995834,16cyclictest8500-21/usr/sbin/munin21:00:190
12254995834,16cyclictest26702-21/usr/sbin/munin22:10:220
12254995832,17cyclictest29181-21/usr/sbin/munin22:20:170
12254995820,14cyclictest325562chrt22:33:460
1225499579,16cyclictest25106-21/usr/sbin/munin22:05:260
1225499578,17cyclictest17521-21/usr/sbin/munin19:30:260
1225499577,18cyclictest22391-21/usr/sbin/munin00:00:200
12254995733,16cyclictest19829-21/usr/sbin/munin23:50:130
12254995733,14cyclictest13905-21/usr/sbin/munin19:15:210
12254995732,16cyclictest7740-21runrttasks23:02:480
12254995731,18cyclictest0-21swapper21:40:100
12254995731,16cyclictest31778-21/usr/sbin/munin20:25:090
12254995710,17cyclictest7278-21ntp_states20:55:210
1225499569,16cyclictest1738-21df22:40:120
1225499568,18cyclictest18469-21/usr/sbin/munin23:45:120
1225499568,16cyclictest10371-21seq23:13:220
12254995633,15cyclictest30569-21ntp_states22:25:240
12254995632,15cyclictest27706-21runrttasks20:09:570
12254995632,15cyclictest13573-21/usr/sbin/munin21:20:130
12254995631,16cyclictest4662-21/usr/sbin/munin22:50:250
12254995631,16cyclictest31542-21/usr/sbin/munin00:35:150
12254995631,15cyclictest28441-21/usr/sbin/munin20:10:300
12254995631,15cyclictest21584-21/usr/sbin/munin19:45:160
12254995611,14cyclictest1-21systemd21:45:320
1225499559,16cyclictest15060-21ntp_states21:25:200
1225499559,14cyclictest3254-21ntp_states22:45:200
1225499559,13cyclictest10703-21/usr/sbin/munin23:15:270
1225499558,15cyclictest26247-21/usr/sbin/munin00:15:260
1225499558,15cyclictest12230-21df21:15:120
1225499557,17cyclictest16060-21/usr/sbin/munin21:30:120
1225499549,14cyclictest16171-21ntp_states23:35:230
1225499549,13cyclictest25043-21/usr/sbin/munin00:10:140
1225499548,13cyclictest17189-21grep23:40:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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