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2026-04-05 - 06:33

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 Sun Apr 05, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36746422377371,4sleep20-21swapper/219:08:128
36745102376357,11sleep80-21swapper/819:06:2514
36744722368340,22sleep130-21swapper/1319:05:575
36746382363355,5sleep150-21swapper/1519:08:097
36747152362354,5sleep110-21swapper/1119:09:093
36746632357338,13sleep140-21swapper/1419:08:236
36746912356335,13sleep50-21swapper/519:08:4611
36745612355335,13sleep30-21swapper/319:07:099
36747142354334,13sleep100-21swapper/1019:09:082
36745482354334,13sleep70-21swapper/719:06:5613
36745402354338,10sleep10-21swapper/119:06:501
36745392351332,13sleep00-21swapper/019:06:490
36745432347328,12sleep40-21swapper/419:06:5310
36744672347328,13sleep90-21swapper/919:05:5415
36745452346326,13sleep60-21swapper/619:06:5412
36747172345327,12sleep120-21swapper/1219:09:094
39509332570,0sleep120-21swapper/1223:23:404
367523499544,25cyclictest0-21swapper/1419:24:366
367523499533,25cyclictest0-21swapper/1421:25:256
367523499435,25cyclictest0-21swapper/1423:15:156
367523499435,25cyclictest0-21swapper/1422:53:166
367523499435,25cyclictest0-21swapper/1421:03:266
367523499435,25cyclictest0-21swapper/1400:21:096
367523499435,25cyclictest0-21swapper/1400:10:106
367523499424,25cyclictest0-21swapper/1423:04:166
367523499415,11cyclictest0-21swapper/1419:57:336
367523499402,25cyclictest0-21swapper/1420:08:326
367520499369,27cyclictest0-21swapper/400:38:1210
3675204993636,0cyclictest0-21swapper/423:33:4110
3675204993636,0cyclictest0-21swapper/423:29:0910
3675204993636,0cyclictest0-21swapper/419:56:0010
3675204993636,0cyclictest0-21swapper/419:33:1910
3675204993636,0cyclictest0-21swapper/419:16:4010
3675204993636,0cyclictest0-21swapper/400:11:4710
3675204993535,0cyclictest0-21swapper/423:48:5110
367523499340,8cyclictest0-21swapper/1420:19:316
3675213993410,24cyclictest0-21swapper/719:34:5613
3675204993434,0cyclictest0-21swapper/420:04:4610
3675204993434,0cyclictest0-21swapper/400:33:0710
3675204993434,0cyclictest0-21swapper/400:19:3110
3675234993310,12cyclictest0-21swapper/1422:31:196
3675217993332,1cyclictest3696624-21kworker/u32:4+events_unbound19:50:1914
3675204993333,0cyclictest0-21swapper/421:13:1510
3675204993333,0cyclictest0-21swapper/420:13:5610
3675198993329,4cyclictest782-21systemd-journal19:24:088
367519899330,32cyclictest782-21systemd-journal19:19:528
367522999320,29cyclictest0-21swapper/1219:40:154
367521099320,32cyclictest0-21swapper/623:53:4712
367519899320,29cyclictest0-21swapper/223:46:538
367519899320,29cyclictest0-21swapper/223:36:098
367519899320,29cyclictest0-21swapper/222:50:478
367519899320,29cyclictest0-21swapper/222:38:178
367519899320,29cyclictest0-21swapper/221:34:078
367519899320,29cyclictest0-21swapper/221:09:358
367519899320,29cyclictest0-21swapper/221:04:298
367519899320,29cyclictest0-21swapper/220:59:298
367519899320,29cyclictest0-21swapper/220:41:058
367519899320,29cyclictest0-21swapper/220:38:128
367519899320,29cyclictest0-21swapper/220:32:378
367519899320,29cyclictest0-21swapper/220:18:128
367519899320,29cyclictest0-21swapper/220:06:548
367519899320,29cyclictest0-21swapper/220:03:368
367519899320,29cyclictest0-21swapper/219:54:008
367519899320,29cyclictest0-21swapper/219:45:278
367519899320,29cyclictest0-21swapper/219:38:118
3675192993231,1cyclictest0-21swapper/000:05:090
367523899310,30cyclictest0-21swapper/1523:30:417
367523199310,30cyclictest0-21swapper/1320:23:445
367522999310,30cyclictest0-21swapper/1219:37:124
3675225993130,1cyclictest1774-21snmpd21:55:173
3675223993130,1cyclictest3989080-21kworker/10:1+events00:35:192
3675223993130,1cyclictest3989080-21kworker/10:1+events00:26:162
3675223993130,1cyclictest3938317-21kworker/10:2+events23:49:352
3675223993130,1cyclictest3893088-21kworker/10:2+events22:44:072
3675223993130,1cyclictest3745774-21kworker/10:1+events22:25:112
3675223993129,1cyclictest3915130-21mii-tool22:55:142
367521999310,30cyclictest0-21swapper/921:26:3115
367521999310,30cyclictest0-21swapper/919:45:1315
3675217993131,0cyclictest0-21swapper/822:33:4914
3675217993131,0cyclictest0-21swapper/800:05:0914
3675217993130,1cyclictest4016564-21kworker/u32:3+flush-259:000:15:1814
3675213993130,1cyclictest1774-21snmpd21:28:0413
3675210993129,2cyclictest1774-21snmpd21:53:5012
3675204993128,3cyclictest0-21swapper/420:50:1610
367520499311,30cyclictest0-21swapper/421:40:2210
3675198993129,1cyclictest3999468-21ethtool00:00:158
367519899312,1cyclictest3885352-21kworker/u32:0+events_unbound22:33:078
367519899310,31cyclictest0-21swapper/219:56:218
367519899310,30cyclictest0-21swapper/222:29:418
367519899310,30cyclictest0-21swapper/221:27:288
367519899310,28cyclictest0-21swapper/220:52:278
367519599310,30cyclictest0-21swapper/119:25:131
367519599310,30cyclictest0-21swapper/100:15:481
367519599310,1cyclictest0-21swapper/119:55:151
3675192993131,0cyclictest0-21swapper/022:55:460
3675192993131,0cyclictest0-21swapper/021:39:510
367523899300,30cyclictest0-21swapper/1519:17:457
367523899300,1cyclictest0-21swapper/1521:32:497
367523499305,25cyclictest0-21swapper/1422:42:186
367523499305,25cyclictest0-21swapper/1421:47:236
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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