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2026-04-19 - 19:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Sun Apr 19, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1804121350,2chrt17152-21/usr/sbin/munin09:27:230
1804121350,2chrt17152-21/usr/sbin/munin09:27:230
1804121350,2chrt17152-21/usr/sbin/munin09:27:230
1378621280,2sleep20-21swapper/209:17:162
1378621280,2sleep20-21swapper/209:17:162
1378621280,2sleep20-21swapper/209:17:162
93121200,1chrt0-21swapper/011:37:070
93121200,1chrt0-21swapper/011:37:070
1291021010,3sleep012912-21grep12:07:180
1291021010,3sleep012912-21grep12:07:180
1291021010,3sleep012912-21grep12:07:180
160932950,3chrt0-21swapper/009:22:200
160932950,3chrt0-21swapper/009:22:200
224832630,2sleep122486-21mailstats12:32:241
224832630,2sleep122486-21mailstats12:32:241
167432620,1sleep016840-21sort07:57:230
167432620,1sleep016840-21sort07:57:230
167432620,1sleep016840-21sort07:57:230
152982620,3sleep30-21swapper/309:22:113
22172600,3sleep20-21swapper/211:37:252
22172600,3sleep20-21swapper/211:37:252
57222590,3sleep20-21swapper/208:57:022
57222590,3sleep20-21swapper/208:57:022
38022560,4sleep03205-21kworker/u9:4+xprtiod10:17:150
38022560,4sleep03205-21kworker/u9:4+xprtiod10:17:150
245642540,3sleep20-21swapper/211:12:172
67162520,2sleep06899-21head07:32:140
67162520,2sleep06899-21head07:32:140
270012470,3chrt0-21swapper/308:27:083
270012470,3chrt0-21swapper/308:27:083
165542470,3sleep30-21swapper/309:22:233
165542470,3sleep30-21swapper/309:22:233
20232460,2chrt0-21swapper/008:47:030
20232460,2chrt0-21swapper/008:47:030
41872440,2sleep00-21swapper/008:52:130
41872440,2sleep00-21swapper/008:52:130
106142430,4sleep010617-21fschecks_time12:02:160
106142430,4sleep010617-21fschecks_time12:02:160
17042420,3sleep01697-21tail11:37:190
17042420,3sleep01697-21tail11:37:190
69492380,2sleep30-21swapper/310:25:553
69492380,2sleep30-21swapper/310:25:553
69492380,2sleep30-21swapper/310:25:553
227592380,3sleep10-21swapper/111:07:171
227592380,3sleep10-21swapper/111:07:171
121212370,2sleep0171ktimers/010:37:250
121212370,2sleep0171ktimers/010:37:250
92332360,2sleep09266-21fschecks_count10:32:160
31565993628,6cyclictest15408-21needreboot10:47:201
31565993628,6cyclictest15408-21needreboot10:47:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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