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2026-05-04 - 23:16

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 Mon May 04, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2024021460,2sleep20-21swapper/208:32:272
484221080,4sleep20-21swapper/209:17:302
484221080,4sleep20-21swapper/209:17:302
3512820,2sleep0201rcuc/011:57:360
3512820,2sleep0201rcuc/011:57:360
3512820,2sleep0201rcuc/011:57:360
10942760,3sleep30-21swapper/310:32:363
10942760,3sleep30-21swapper/310:32:363
11082680,3sleep30-21swapper/307:42:153
11082680,3sleep30-21swapper/307:42:153
11082680,3sleep30-21swapper/307:42:153
99922660,4sleep20-21swapper/209:32:172
99922660,4sleep20-21swapper/209:32:172
9722660,3sleep20-21swapper/210:32:352
9722660,3sleep20-21swapper/210:32:352
227782630,3chrt0-21swapper/308:37:353
227782630,3chrt0-21swapper/308:37:353
85712620,3chrt0-21swapper/009:27:290
85712620,3chrt0-21swapper/009:27:290
48272610,3sleep30-21swapper/307:51:523
68862560,3sleep20-21swapper/210:47:392
68862560,3sleep20-21swapper/210:47:392
68862560,3sleep20-21swapper/210:47:392
254772490,2chrt25474-21mailstats11:37:380
254772490,2chrt25474-21mailstats11:37:380
284152470,2sleep20-21swapper/211:47:282
284152470,2sleep20-21swapper/211:47:282
284152470,2sleep20-21swapper/211:47:282
255172470,1sleep30-21swapper/310:12:303
255172470,1sleep30-21swapper/310:12:303
138382460,2sleep20-21swapper/212:32:392
138382460,2sleep20-21swapper/212:32:392
81802450,3sleep30-21swapper/310:52:303
81802450,3sleep30-21swapper/310:52:303
141072450,2chrt0-21swapper/211:07:372
141072450,2chrt0-21swapper/211:07:372
164862430,1sleep00-21swapper/012:42:260
164862430,1sleep00-21swapper/012:42:260
164862430,1sleep00-21swapper/012:42:260
97602420,3sleep30-21swapper/310:57:293
302962390,2sleep10-21swapper/108:57:361
302962390,2sleep10-21swapper/108:57:361
157672390,3sleep20-21swapper/211:12:312
157672390,3sleep20-21swapper/211:12:312
237712380,4sleep20-21swapper/210:07:312
237712380,4sleep20-21swapper/210:07:312
237712380,4sleep20-21swapper/210:07:312
22688993627,7cyclictest11674-21fschecks_time11:02:290
22688993627,7cyclictest11674-21fschecks_time11:02:290
108632360,3sleep30-21swapper/308:07:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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