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2026-05-16 - 14:20

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Sat May 16, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2028521200,2sleep30-21swapper/308:42:493
2028521200,2sleep30-21swapper/308:42:493
2028521200,2sleep30-21swapper/308:42:493
2365121040,3sleep30-21swapper/307:27:403
122352980,2sleep30-21swapper/308:22:433
122352980,2sleep30-21swapper/308:22:433
122352980,2sleep30-21swapper/308:22:433
163072920,2sleep016309-21fschecks_time11:27:400
163072920,2sleep016309-21fschecks_time11:27:400
56182860,4chrt0-21swapper/310:57:483
56182860,4chrt0-21swapper/310:57:483
231162840,6sleep123119-21gltestperf08:52:401
231162840,6sleep123119-21gltestperf08:52:401
256692660,3sleep30-21swapper/307:32:423
285522640,3sleep117874-21cyclictest10:32:461
285522640,3sleep117874-21cyclictest10:32:461
310842610,3sleep30-21swapper/312:07:393
261822610,2sleep126184-21grep10:27:391
261822610,2sleep126184-21grep10:27:391
183342580,3sleep30-21swapper/308:37:513
183342580,3sleep30-21swapper/308:37:513
183342580,3sleep30-21swapper/308:37:513
181712540,3sleep20-21swapper/208:37:502
181712540,3sleep20-21swapper/208:37:502
181712540,3sleep20-21swapper/208:37:502
291732500,2chrt0-21swapper/312:02:363
318222490,4sleep20-21swapper/210:42:402
318222490,4sleep20-21swapper/210:42:402
318222490,4sleep20-21swapper/210:42:402
30822490,1sleep13084-21fschecks_time10:52:401
87422470,3sleep20-21swapper/211:07:402
4192470,3sleep30-21swapper/309:17:473
4192470,3sleep30-21swapper/309:17:473
211062460,2sleep30-21swapper/310:12:473
211062460,2sleep30-21swapper/310:12:473
229222450,4sleep30-21swapper/311:42:513
229222450,4sleep30-21swapper/311:42:513
229222450,4sleep30-21swapper/311:42:513
171452450,3sleep30-21swapper/308:37:393
171452450,3sleep30-21swapper/308:37:393
171452450,3sleep30-21swapper/308:37:393
164162440,1sleep10-21swapper/110:02:271
164162440,1sleep10-21swapper/110:02:271
188452420,3sleep10-21swapper/111:32:491
188452420,3sleep10-21swapper/111:32:491
36912380,3sleep20-21swapper/209:27:382
23452370,3sleep12341-21cpuspeed12:17:381
23452370,3sleep12341-21cpuspeed12:17:381
17876993731,4cyclictest28740-21latency_hist07:42:271
17876993729,6cyclictest30397-21netstat10:37:461
17876993729,6cyclictest30397-21netstat10:37:461
17876993728,7cyclictest25758-21kernelversion07:32:431
54672350,2sleep05601-21grep09:32:400
54672350,2sleep05601-21grep09:32:400
186612350,2sleep118664-21fschecks_count10:07:411
186612350,2sleep118664-21fschecks_count10:07:411
97762340,3sleep20-21swapper/208:17:412
97762340,3sleep20-21swapper/208:17:412
96532340,2sleep30-21swapper/312:37:303
96532340,2sleep30-21swapper/312:37:303
96532340,2sleep30-21swapper/312:37:303
21092340,3sleep30-21swapper/307:57:353
21092340,3sleep30-21swapper/307:57:353
205372340,3sleep20-21swapper/208:45:222
205372340,3sleep20-21swapper/208:45:222
205372340,3sleep20-21swapper/208:45:222
17876993427,5cyclictest22530-21threads07:22:491
17876993427,5cyclictest22530-21threads07:22:491
17875993424,3cyclictest13945-21cat11:22:270
17875993424,3cyclictest13945-21cat11:22:270
210232330,2sleep121020-21grep10:12:441
210232330,2sleep121020-21grep10:12:441
17876993327,4cyclictest12050-21kernelversion08:22:411
17876993327,4cyclictest12050-21kernelversion08:22:411
17876993327,4cyclictest12050-21kernelversion08:22:411
17876993326,5cyclictest8226-21threads09:37:501
17875993327,5cyclictest17874-21cyclictest08:02:450
17875993327,5cyclictest17874-21cyclictest08:02:450
17876993226,5cyclictest21559-21latency_hist11:42:321
17876993226,5cyclictest21559-21latency_hist11:42:321
17876993226,4cyclictest9597-21latency_hist12:37:271
17876993226,4cyclictest9597-21latency_hist12:37:271
17876993226,4cyclictest9597-21latency_hist12:37:271
17876993224,6cyclictest17715-21latency_hist11:32:281
17876993224,6cyclictest17715-21latency_hist11:32:281
17876993223,7cyclictest31859-21threads07:47:501
17876993223,7cyclictest31859-21threads07:47:501
17876993223,6cyclictest550-21cron09:17:351
17876993223,6cyclictest550-21cron09:17:351
17875993225,5cyclictest17462-21gltestperf08:37:410
17875993225,5cyclictest17462-21gltestperf08:37:410
17875993225,5cyclictest17462-21gltestperf08:37:410
17875993224,6cyclictest2905-21latency_hist10:52:380
17875993224,6cyclictest2905-21latency_hist10:52:380
67332310,3sleep30-21swapper/312:27:453
67332310,3sleep30-21swapper/312:27:453
67332310,3sleep30-21swapper/312:27:453
303812310,2chrt0-21swapper/209:12:392
303812310,2chrt0-21swapper/209:12:392
17876993125,4cyclictest24288-21fschecks_count10:22:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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