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2026-09-18 - 10:02

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 Fri Sep 18, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2024021350,3sleep30-21swapper/321:39:423
2024021350,3sleep30-21swapper/321:39:423
1796021130,2sleep30-21swapper/320:09:333
1796021130,2sleep30-21swapper/320:09:333
22732980,2chrt0-21swapper/222:19:372
22732980,2chrt0-21swapper/222:19:372
22732980,2chrt0-21swapper/222:19:372
22962840,3sleep2351rcuc/223:44:442
183912800,3sleep30-21swapper/300:29:353
183912800,3sleep30-21swapper/300:29:353
237232770,2chrt0-21swapper/121:49:411
160252720,3sleep20-21swapper/221:29:362
70252670,4sleep17030-21tail23:59:341
70252670,4sleep17030-21tail23:59:341
107722650,2sleep010775-21cron22:44:200
107722650,2sleep010775-21cron22:44:200
217892630,3chrt0-21swapper/220:19:332
217892630,3chrt0-21swapper/220:19:332
127432580,3chrt12157-21/usr/sbin/munin19:54:350
127432580,3chrt12157-21/usr/sbin/munin19:54:350
56322520,3sleep30-21swapper/322:29:313
56322520,3sleep30-21swapper/322:29:313
30126995225,24cyclictest12095-21latency_hist00:14:200
30126995225,24cyclictest12095-21latency_hist00:14:200
3012699521,26cyclictest8439-21cut00:04:260
3012699521,26cyclictest8439-21cut00:04:260
3012699492,8cyclictest17988-21runrttasks23:00:440
3012699492,8cyclictest17988-21runrttasks23:00:440
3012699491,8cyclictest15450-21chrt20:01:220
3012699491,8cyclictest15450-21chrt20:01:220
3012699481,9cyclictest749-21runrttasks21:50:210
3012699481,9cyclictest30361-21taskset20:40:490
3012699481,9cyclictest30361-21taskset20:40:490
3012699481,6cyclictest1276-21runrttasks22:18:070
80812470,2chrt8084-21cut21:09:331
80812470,2chrt8084-21cut21:09:331
3012699474,27cyclictest6149-21taskset19:37:260
3012699474,27cyclictest6149-21taskset19:37:260
3012699461,8cyclictest12932-21chrt21:20:420
3012699461,8cyclictest12932-21chrt21:20:420
3012699460,4cyclictest700-21192.168.115.40-manager23:37:300
3012699460,3cyclictest700-21192.168.115.40-manager19:25:130
3012699458,23cyclictest5482chrt23:41:280
3012699458,23cyclictest5482chrt23:41:280
3012699451,7cyclictest21419-21taskset00:39:050
3012699451,6cyclictest16245-21taskset22:57:140
3012699451,6cyclictest15684-21runrttasks00:22:250
3012699451,6cyclictest15684-21runrttasks00:22:250
3012699451,6cyclictest15684-21runrttasks00:22:250
3012699451,2cyclictest700-21192.168.115.40-manager21:27:500
287812450,2sleep30-21swapper/320:39:203
287812450,2sleep30-21swapper/320:39:203
3012699444,26cyclictest31750-21seq22:11:550
3012699441,8cyclictest12618-21taskset22:48:530
3012699441,7cyclictest23168-21taskset00:42:390
3012699441,7cyclictest23168-21taskset00:42:390
3012699441,7cyclictest19971-21taskset23:07:020
3012699441,7cyclictest19971-21taskset23:07:020
3012699441,7cyclictest1950-21seq20:54:170
3012699441,7cyclictest1950-21seq20:54:170
3012699441,6cyclictest4433-21runrttasks23:52:540
3012699441,5cyclictest19283-21chrt00:30:330
3012699441,5cyclictest19283-21chrt00:30:330
3012699440,8cyclictest26279-21taskset21:58:480
3012699440,8cyclictest2405-21seq23:45:460
3012699440,7cyclictest749-21runrttasks23:24:520
3012699440,7cyclictest749-21runrttasks23:24:520
3012699440,4cyclictest700-21192.168.115.40-manager20:33:290
3012699440,4cyclictest700-21192.168.115.40-manager19:29:580
3012699440,3cyclictest700-21192.168.115.40-manager20:18:590
3012699440,3cyclictest700-21192.168.115.40-manager20:18:590
30126994320,21cyclictest10791-21kernelversion19:49:350
3012699431,6cyclictest28102-21chrt22:03:150
3012699431,6cyclictest28102-21chrt22:03:150
3012699430,6cyclictest11259-21seq21:18:090
3012699430,6cyclictest11259-21seq21:18:090
3012699430,3cyclictest700-21192.168.115.40-manager20:26:380
262872430,2sleep20-21swapper/223:24:342
262872430,2sleep20-21swapper/223:24:342
108742430,3sleep30-21swapper/319:49:353
30128994225,10cyclictest84402sleep200:04:272
30128994225,10cyclictest84402sleep200:04:272
3012699411,2cyclictest0-21swapper/022:25:300
3012699411,2cyclictest0-21swapper/022:25:300
30126994111,28cyclictest17322-21seq20:06:130
3012699410,7cyclictest5445-21taskset21:00:590
3012699410,7cyclictest5445-21taskset21:00:590
3012699410,6cyclictest7945-21chrt19:41:360
3012699410,6cyclictest7945-21chrt19:41:360
3012699410,6cyclictest7945-21chrt19:41:360
3012699410,4cyclictest700-21192.168.115.40-manager23:30:190
3012699401,3cyclictest700-21192.168.115.40-manager21:10:340
3012699401,3cyclictest700-21192.168.115.40-manager21:10:340
3012699400,4cyclictest700-21192.168.115.40-manager23:10:510
3012699400,4cyclictest700-21192.168.115.40-manager23:10:510
3012699400,3cyclictest700-21192.168.115.40-manager21:30:030
3012699400,3cyclictest700-21192.168.115.40-manager20:36:590
3012699400,3cyclictest700-21192.168.115.40-manager20:36:590
3012699400,3cyclictest700-21192.168.115.40-manager20:20:550
3012699400,3cyclictest700-21192.168.115.40-manager20:20:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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