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2026-05-15 - 19:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
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 rack0slot4s.osadl.org (updated Fri May 15, 2026 00:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23816222410369,34sleep90-21swapper/919:08:3815
23815022376369,5sleep00-21swapper/019:07:090
23814332372334,13sleep150-21swapper/1519:06:207
23813152371327,13sleep130-21swapper/1319:05:295
23816852362324,13sleep10-21swapper/119:09:351
23813752360326,22sleep110-21swapper/1119:05:433
23815592357340,11sleep40-21swapper/419:07:4510
23815972352332,13sleep80-21swapper/819:08:2214
23815462352332,13sleep120-21swapper/1219:07:374
23815372352332,13sleep100-21swapper/1019:07:342
23814612350330,13sleep30-21swapper/319:06:399
23814982349329,13sleep140-21swapper/1419:07:076
23814422349329,13sleep70-21swapper/719:06:2813
23816692347328,12sleep20-21swapper/219:09:208
23815322345325,13sleep60-21swapper/619:07:3112
23813652341320,14sleep50-21swapper/519:05:3811
2382083995146,3cyclictest0-21swapper/1500:00:137
238208099424,13cyclictest0-21swapper/1400:17:476
2382041994241,1cyclictest2661175-21kworker/u32:5+events_unbound23:40:498
2382041994241,1cyclictest2661175-21kworker/u32:5+events_unbound23:40:498
2382043994140,1cyclictest0-21swapper/319:14:599
2382041993938,1cyclictest2661175-21kworker/u32:5+events_unbound23:50:198
2382041993837,1cyclictest1769-21arpwatch22:25:178
2382041993836,0cyclictest0-21swapper/200:06:478
2382041993635,1cyclictest0-21swapper/222:38:218
2382041993634,2cyclictest1769-21arpwatch22:08:138
2382041993634,2cyclictest0-21swapper/223:17:118
2382041993634,2cyclictest0-21swapper/221:49:438
2382041993633,3cyclictest0-21swapper/221:15:278
2382041993629,3cyclictest0-21swapper/223:02:198
2382041993534,1cyclictest2403684-21kworker/u32:1+events_unbound19:50:258
2382041993534,1cyclictest0-21swapper/223:26:538
2382041993533,2cyclictest0-21swapper/220:00:138
2382041993533,2cyclictest0-21swapper/200:13:578
2382041993532,3cyclictest1769-21arpwatch22:48:008
2382041993532,3cyclictest0-21swapper/223:45:218
2382041993532,3cyclictest0-21swapper/221:11:228
2382041993527,3cyclictest0-21swapper/221:38:318
238204199350,31cyclictest211rcu_preempt22:55:338
2382041993433,1cyclictest2689257-21kworker/u32:2+events_unbound23:55:268
2382041993433,1cyclictest0-21swapper/222:19:578
238204199343,31cyclictest0-21swapper/200:26:538
2382041993432,2cyclictest0-21swapper/221:56:068
2382041993432,0cyclictest0-21swapper/220:20:118
2382041993432,0cyclictest0-21swapper/220:20:118
2382041993429,3cyclictest0-21swapper/200:03:598
2382041993428,3cyclictest1769-21arpwatch00:17:378
2382041993420,4cyclictest0-21swapper/219:22:378
238204199340,1cyclictest0-21swapper/221:31:118
238204199337,0cyclictest0-21swapper/200:22:218
2382041993333,0cyclictest0-21swapper/222:41:478
2382041993333,0cyclictest0-21swapper/222:34:358
2382041993331,2cyclictest0-21swapper/223:34:598
2382041993331,2cyclictest0-21swapper/223:34:598
2382041993331,2cyclictest0-21swapper/200:35:498
2382041993331,0cyclictest0-21swapper/220:50:198
2382041993331,0cyclictest0-21swapper/219:25:238
2382041993329,2cyclictest0-21swapper/220:45:198
238204199331,31cyclictest0-21swapper/221:41:078
238204199331,29cyclictest2671313-21kworker/2:0+mm_percpu_wq23:35:258
238204199331,29cyclictest2671313-21kworker/2:0+mm_percpu_wq23:35:258
238204199330,33cyclictest2087047-21kworker/2:0+mm_percpu_wq19:40:238
238204199330,32cyclictest2585318-21kworker/2:0+mm_percpu_wq23:23:198
238204199330,31cyclictest2533519-21kworker/2:2+events22:23:338
238204199330,31cyclictest2500300-21ssh21:20:428
238204199330,30cyclictest2585318-21kworker/2:0+events22:50:298
2382033993329,4cyclictest2614388-21mii-tool22:50:150
2382033993329,4cyclictest1774-21snmpd19:49:100
2382041993231,1cyclictest0-21swapper/223:10:238
2382041993230,2cyclictest0-21swapper/222:10:178
2382041993230,2cyclictest0-21swapper/222:04:138
2382041993230,0cyclictest0-21swapper/221:25:118
2382041993227,3cyclictest2538860-21ssh21:50:338
238204199320,29cyclictest0-21swapper/200:31:078
2382083993128,2cyclictest1774-21snmpd21:38:127
238208399310,30cyclictest0-21swapper/1522:20:137
238208399310,30cyclictest0-21swapper/1520:46:287
238208099317,13cyclictest0-21swapper/1419:32:136
238208099316,25cyclictest0-21swapper/1400:39:456
238208099310,30cyclictest0-21swapper/1422:30:156
2382077993130,1cyclictest1774-21snmpd22:55:085
2382077993130,1cyclictest1774-21snmpd21:31:575
238207799310,30cyclictest0-21swapper/1320:04:205
238207799310,30cyclictest0-21swapper/1319:10:095
2382073993130,1cyclictest1774-21snmpd23:36:394
2382073993130,1cyclictest1774-21snmpd23:36:394
238207399310,30cyclictest2616356-21ssh22:51:114
2382068993130,1cyclictest2422781-21ethtool19:55:153
2382063993130,1cyclictest2553239-21kworker/10:1+events22:23:412
2382063993130,1cyclictest1774-21snmpd22:10:492
2382063993129,1cyclictest2690424-21kworker/10:0+events00:31:092
2382063993129,1cyclictest2690424-21kworker/10:0+events00:27:592
238206299310,30cyclictest0-21swapper/920:10:1815
238205999310,30cyclictest0-21swapper/821:31:0314
238205999310,30cyclictest0-21swapper/819:28:4414
238205799310,30cyclictest0-21swapper/720:48:3413
2382049993130,1cyclictest1774-21snmpd23:21:0611
238204799310,30cyclictest0-21swapper/419:15:4910
2382041993130,1cyclictest0-21swapper/220:25:198
2382041993130,1cyclictest0-21swapper/220:25:198
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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