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2026-09-05 - 01:23

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 Sat Sep 05, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39143902382375,5sleep60-21swapper/619:05:2212
39155302379358,14sleep10-21swapper/119:08:301
39155512369314,13sleep30-21swapper/319:08:499
39155532354334,13sleep50-21swapper/519:08:5011
39154042354335,13sleep110-21swapper/1119:06:483
39156272352329,14sleep20-21swapper/219:09:528
39156342351327,16sleep70-21swapper/719:09:5713
39155332351333,12sleep40-21swapper/419:08:3410
39153382350310,13sleep100-21swapper/1019:05:582
39153812349328,14sleep80-21swapper/819:06:2814
39154682348329,12sleep130-21swapper/1319:07:385
39156042347327,13sleep150-21swapper/1519:09:327
39155792346327,12sleep140-21swapper/1419:09:156
39154622346326,13sleep90-21swapper/919:07:3415
39153922345325,14sleep00-21swapper/019:06:360
39155772344323,14sleep120-21swapper/1219:09:144
3916051994745,2cyclictest4170965-21kworker/u32:4+events_unbound23:15:169
3916070993938,1cyclictest1973-21kworker/u32:3+events_unbound23:35:172
3916079993837,1cyclictest3880992-1kworker/u33:1+i915_flip23:51:545
3916079993733,1cyclictest0-21swapper/1323:26:195
3916070993736,1cyclictest4056185-21kworker/u32:1+events_unbound21:50:172
3916070993728,0cyclictest4099256-21kworker/10:0+events22:56:552
391608599350,30cyclictest4054565-21ssh21:37:497
3916079993534,1cyclictest4117816-21kworker/u32:1+events_unbound23:10:175
3916056993533,2cyclictest0-21swapper/523:51:5411
3916043993533,2cyclictest4103351-21kworker/u32:0+flush-259:023:40:211
3916053993431,2cyclictest4034504-21kworker/u32:2+events_unbound21:36:5010
3916070993332,1cyclictest4016893-21kworker/u32:0+events_unbound21:10:162
3916070993332,1cyclictest3954215-21kworker/u32:1+events_unbound20:50:142
3916070993329,1cyclictest0-21swapper/1000:02:112
3916067993330,3cyclictest28954-21latency_hist23:50:0015
3916056993332,0cyclictest0-21swapper/522:56:5511
3916056993331,0cyclictest0-21swapper/523:26:1911
3916046993332,1cyclictest4103351-21kworker/u32:0+flush-259:023:25:058
391604199330,29cyclictest0-21swapper/022:05:140
391608599321,23cyclictest0-21swapper/1523:26:187
3916079993230,1cyclictest0-21swapper/1322:15:125
3916064993230,2cyclictest4000385-21kworker/u32:0+flush-259:020:55:1914
391606299320,31cyclictest0-21swapper/721:25:1613
391608399310,30cyclictest0-21swapper/1420:37:066
391607799310,30cyclictest0-21swapper/1221:33:444
3916073993130,1cyclictest0-21swapper/1100:15:463
391607399310,30cyclictest0-21swapper/1123:37:393
391607399310,30cyclictest0-21swapper/1120:42:513
391607399310,30cyclictest0-21swapper/1100:24:393
3916070993130,1cyclictest4183198-21kworker/10:0+events23:43:172
3916070993130,1cyclictest4099256-21kworker/10:0+events22:47:502
3916070993130,1cyclictest4099256-21kworker/10:0+events22:31:432
3916070993130,1cyclictest4021797-21kworker/10:2+events22:14:052
3916070993130,1cyclictest4021797-21kworker/10:2+events21:47:562
3916070993129,1cyclictest4169865-21kworker/10:2+events23:18:172
3916070993129,0cyclictest54440-21kworker/10:2+events00:26:212
3916070993126,0cyclictest4099256-21kworker/10:0+events22:26:562
3916067993126,5cyclictest1774-21snmpd00:33:2215
391606799310,30cyclictest0-21swapper/900:03:3215
3916064993130,1cyclictest4000385-21kworker/u32:0+flush-259:020:50:1614
3916064993130,1cyclictest1774-21snmpd20:00:1814
3916064993130,1cyclictest1774-21snmpd20:00:1714
3916064993130,1cyclictest0-21swapper/820:08:5414
3916064993130,1cyclictest0-21swapper/820:08:5314
391605899314,27cyclictest0-21swapper/621:29:1112
3916056993131,0cyclictest0-21swapper/521:35:1811
3916056993131,0cyclictest0-21swapper/521:05:0211
3916056993130,1cyclictest4034504-21kworker/u32:2+events_unbound22:05:1411
391605199310,30cyclictest0-21swapper/323:41:299
3916046993130,1cyclictest1774-21snmpd22:02:478
391604399310,30cyclictest0-21swapper/123:23:281
391604399310,30cyclictest0-21swapper/120:15:291
3916085993027,3cyclictest4096608-21ethtool22:10:147
391608599300,30cyclictest0-21swapper/1522:33:437
391608599300,1cyclictest0-21swapper/1522:53:197
3916083993029,1cyclictest1774-21snmpd21:34:526
3916083993029,1cyclictest1774-21snmpd20:34:016
3916083993029,1cyclictest1774-21snmpd19:30:286
391608399300,30cyclictest0-21swapper/1400:16:576
391608399300,29cyclictest0-21swapper/1421:50:536
3916079993030,0cyclictest0-21swapper/1321:05:025
3916079993029,1cyclictest42493-21kworker/u32:3+events_unbound00:02:455
3916079993029,1cyclictest1774-21snmpd00:14:555
3916073993029,1cyclictest1774-21snmpd23:24:023
3916073993029,1cyclictest1774-21snmpd21:26:463
3916073993029,1cyclictest1774-21snmpd20:45:333
3916073993029,1cyclictest0-21swapper/1100:02:143
391607399300,30cyclictest0-21swapper/1122:12:293
391607399300,30cyclictest0-21swapper/1100:39:313
391607399300,29cyclictest0-21swapper/1122:01:353
391607399300,29cyclictest0-21swapper/1121:52:053
391607399300,28cyclictest0-21swapper/1122:35:133
3916070993030,0cyclictest4183198-21kworker/10:0+events23:32:572
3916070993030,0cyclictest4183198-21kworker/10:0+events23:24:402
3916070993030,0cyclictest4099256-21kworker/10:0+events23:10:142
3916070993030,0cyclictest4099256-21kworker/10:0+events22:40:242
3916070993030,0cyclictest39858-21kworker/10:1+events00:12:442
3916070993030,0cyclictest3932044-21kworker/10:1+events20:57:292
3916070993030,0cyclictest3932044-21kworker/10:1+events20:48:012
3916070993030,0cyclictest3932044-21kworker/10:1+events20:30:232
3916070993030,0cyclictest3932044-21kworker/10:1+events20:25:262
3916070993030,0cyclictest3630822-21kworker/10:2+events19:10:332
3916070993029,1cyclictest54440-21kworker/10:2+events00:30:202
3916070993029,1cyclictest54440-21kworker/10:2+events00:15:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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