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2026-07-16 - 00:28

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 Wed Jul 15, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3179221380,3sleep30-21swapper/309:58:443
3179221380,3sleep30-21swapper/309:58:443
1894621020,3sleep01580-21cyclictest07:58:410
1894621020,3sleep01580-21cyclictest07:58:410
1894621020,3sleep01580-21cyclictest07:58:410
169972900,1sleep00-21swapper/012:13:360
169972900,1sleep00-21swapper/012:13:360
169972900,1sleep00-21swapper/012:13:360
69952890,2chrt0-21swapper/308:53:403
69952890,2chrt0-21swapper/308:53:403
89412730,3chrt0-21swapper/310:23:443
89412730,3chrt0-21swapper/310:23:443
89412730,3chrt0-21swapper/310:23:443
52902640,2sleep20-21swapper/207:23:342
52902640,2sleep20-21swapper/207:23:342
267972590,3sleep00-21swapper/012:38:440
267972590,3sleep00-21swapper/012:38:440
267972590,3sleep00-21swapper/012:38:440
54062560,3chrt0-21swapper/011:43:330
54062560,3chrt0-21swapper/011:43:330
54062560,3chrt0-21swapper/011:43:330
32062500,2sleep00-21swapper/011:38:220
32062500,2sleep00-21swapper/011:38:220
213292500,2sleep20-21swapper/209:33:262
213292500,2sleep20-21swapper/209:33:262
233092490,1sleep2351rcuc/209:38:332
8872460,2sleep20-21swapper/211:28:442
8872460,2sleep20-21swapper/211:28:442
8872460,2sleep20-21swapper/211:28:442
208482440,3sleep30-21swapper/309:28:453
208482440,3sleep30-21swapper/309:28:453
109732420,2sleep00-21swapper/009:03:430
109732420,2sleep00-21swapper/009:03:430
253592410,2sleep125558-21grep09:43:351
253592410,2sleep125558-21grep09:43:351
1596994134,4cyclictest201rcuc/007:29:310
1596994134,4cyclictest201rcuc/007:29:310
74742400,2sleep17575-21memory07:28:371
74742400,2sleep17575-21memory07:28:371
1596994032,5cyclictest201rcuc/012:04:150
1596994032,5cyclictest201rcuc/012:04:150
1596994032,5cyclictest201rcuc/012:04:150
1596993821,4cyclictest90-1pr/ttyS008:33:430
1596993821,4cyclictest90-1pr/ttyS008:33:430
1596993821,4cyclictest90-1pr/ttyS008:33:430
1596993811,7cyclictest201rcuc/007:44:460
1596993811,7cyclictest201rcuc/007:44:460
1596993811,7cyclictest201rcuc/007:44:460
181532370,5sleep20-21swapper/210:48:442
181532370,5sleep20-21swapper/210:48:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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