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2026-07-27 - 23:54

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 Mon Jul 27, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
155283429674,21sleep60-21swapper/619:08:2712
19046312890,0chrt0-21swapper/100:21:581
155258626345,1sleep130-21swapper/1319:05:385
155277524946,2sleep150-21swapper/1519:07:487
155265524925,1sleep50-21swapper/519:06:1811
155266324744,2sleep120-21swapper/1219:06:244
155269124442,1sleep00-21swapper/019:06:450
155265924240,1sleep90-21swapper/919:06:2115
155268124038,1sleep70-21swapper/719:06:3613
1553384993836,2cyclictest0-21swapper/020:24:440
1553384993836,2cyclictest0-21swapper/020:24:440
155287323817,1sleep20-21swapper/219:08:568
155273823735,1sleep30-21swapper/319:07:209
155265823735,1sleep80-21swapper/819:06:2014
1553391993635,1cyclictest618598-21thunderbird21:31:598
155291423634,1sleep10-21swapper/119:09:271
155342699350,11cyclictest618598-21thunderbird22:18:376
1553402993534,0cyclictest0-21swapper/600:27:3312
155339199351,32cyclictest3318-21Xorg21:58:398
155282223533,1sleep140-21swapper/1419:08:196
155281023533,1sleep40-21swapper/419:08:0910
1553391993433,1cyclictest618598-21thunderbird00:23:578
155258323432,1sleep110-21swapper/1119:05:353
155341799330,33cyclictest0-21swapper/1123:20:153
155341799330,33cyclictest0-21swapper/1123:20:153
1553414993327,3cyclictest1819931-21kworker/10:0+events23:30:232
1553398993328,2cyclictest618698-21WRScene~ilder#100:35:1411
1553396993328,5cyclictest1774-21snmpd21:55:0810
1553391993332,1cyclictest618598-21thunderbird23:27:538
1553391993332,1cyclictest618598-21thunderbird23:27:538
155264023331,1sleep100-21swapper/1019:06:072
1553414993230,1cyclictest1594581-21kworker/10:1+events20:40:172
1553414993225,4cyclictest1909048-21kworker/10:2+events00:26:112
1553391993227,2cyclictest618598-21thunderbird19:30:228
1553391993226,3cyclictest618698-21WRScene~ilder#120:23:038
1553391993226,3cyclictest618698-21WRScene~ilder#120:23:038
155339199320,30cyclictest618698-21WRScene~ilder#119:14:438
1553423993130,1cyclictest1774-21snmpd21:08:335
155341999310,30cyclictest0-21swapper/1222:30:004
1553414993130,1cyclictest1909048-21kworker/10:2+events00:32:032
1553414993130,1cyclictest1880230-21kworker/10:1+events00:13:092
1553414993130,1cyclictest1819931-21kworker/10:0+events23:43:232
1553414993130,1cyclictest1819931-21kworker/10:0+events00:03:212
1553414993130,1cyclictest1774-21snmpd20:10:382
1553414993130,1cyclictest1725196-21kworker/10:2+events22:08:212
1553414993130,1cyclictest1594581-21kworker/10:1+events21:50:362
1553414993130,1cyclictest1594581-21kworker/10:1+events21:44:452
1553414993130,1cyclictest0-21swapper/1019:18:302
1553414993129,1cyclictest1819931-21kworker/10:0+events23:55:372
1553414993129,1cyclictest1774986-21kworker/10:2+events23:10:092
1553414993129,1cyclictest1774986-21kworker/10:2+events22:55:012
1553414993129,1cyclictest1738554-21kworker/10:0+events22:38:052
1553414993129,1cyclictest1594581-21kworker/10:1+events21:03:452
1553402993128,3cyclictest1774-21snmpd21:27:1612
1553398993130,1cyclictest1774-21snmpd23:43:1411
1553396993127,4cyclictest1774-21snmpd00:04:4210
1553393993130,1cyclictest1774-21snmpd20:49:339
155339399310,30cyclictest0-21swapper/323:46:179
155339399310,30cyclictest0-21swapper/320:30:159
1553391993130,1cyclictest618698-21WRScene~ilder#123:16:358
1553391993130,1cyclictest618698-21WRScene~ilder#123:16:358
1553391993130,1cyclictest618698-21WRScene~ilder#122:58:058
1553391993130,1cyclictest618598-21thunderbird22:03:258
1553391993130,1cyclictest1751584-21kworker/u32:0+flush-259:023:01:578
1553391993127,4cyclictest618598-21thunderbird19:40:128
1553391993126,3cyclictest618598-21thunderbird23:09:258
1553391993125,3cyclictest618598-21thunderbird20:50:258
1553391993124,4cyclictest618598-21thunderbird21:47:488
155339199310,28cyclictest0-21swapper/219:58:538
1553384993130,1cyclictest1837635-21ethtool23:30:150
1553384993130,1cyclictest1491561-21kworker/u32:4+events_unbound19:10:180
155338499310,30cyclictest0-21swapper/020:43:300
1553428993029,1cyclictest1774-21snmpd23:44:477
1553428993029,1cyclictest1774-21snmpd20:55:007
1553428993029,1cyclictest1774-21snmpd20:48:487
1553428993029,1cyclictest1774-21snmpd20:10:047
155342899300,1cyclictest0-21swapper/1521:46:257
1553426993029,1cyclictest1754117-21mii-tool22:25:166
1553426993029,1cyclictest1734792-21ethtool22:10:156
1553426993029,1cyclictest1590115-21mii-tool19:50:156
155342699300,30cyclictest0-21swapper/1421:30:466
155342699300,30cyclictest0-21swapper/1421:27:226
1553423993029,1cyclictest1774-21snmpd22:20:265
1553423993029,1cyclictest1774-21snmpd21:56:325
1553423993029,1cyclictest1774-21snmpd19:54:015
1553419993029,1cyclictest1774-21snmpd19:56:434
155341999300,30cyclictest618598-21thunderbird23:33:104
155341999300,30cyclictest0-21swapper/1221:50:174
155341999300,30cyclictest0-21swapper/1220:33:274
155341999300,30cyclictest0-21swapper/1220:07:384
155341999300,1cyclictest618680-21Compositor00:20:164
1553417993029,1cyclictest1774-21snmpd22:29:453
1553417993029,1cyclictest1774-21snmpd20:46:273
1553417993029,1cyclictest0-21swapper/1119:38:243
155341799300,30cyclictest0-21swapper/1120:31:263
155341799300,1cyclictest618598-21thunderbird22:08:083
1553414993029,1cyclictest1909048-21kworker/10:2+events00:35:352
1553414993029,1cyclictest1880230-21kworker/10:1+events00:20:132
1553414993029,1cyclictest1880230-21kworker/10:1+events00:16:152
1553414993029,1cyclictest1819931-21kworker/10:0+events23:51:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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