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2026-08-12 - 06:04

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 Wed Aug 12, 2026 00:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15350782364356,5sleep60-21swapper/619:08:4912
15349532364323,13sleep30-21swapper/319:07:099
15348572362344,12sleep140-21swapper/1419:06:006
15351242354314,13sleep20-21swapper/219:09:178
15348272353331,14sleep150-21swapper/1519:05:447
15349412351331,13sleep80-21swapper/819:06:5814
15351122350331,13sleep110-21swapper/1119:09:103
15349612350330,13sleep90-21swapper/919:07:1515
15350192349328,14sleep70-21swapper/719:08:0113
15351592347327,13sleep10-21swapper/119:09:481
15348522347327,13sleep120-21swapper/1219:05:574
15348422346326,13sleep50-21swapper/519:05:4911
15349432345325,13sleep100-21swapper/1019:07:002
15348802343323,13sleep130-21swapper/1319:06:145
15351582340322,11sleep00-21swapper/019:09:470
15348112340319,14sleep40-21swapper/419:05:3210
1535637994241,1cyclictest0-21swapper/1123:05:033
153563799403,24cyclictest1615419-21kworker/u32:4+writeback21:10:173
1535614994039,1cyclictest1818895-21ntpq23:30:198
1535614994039,1cyclictest1716749-21kworker/u32:1+events_unbound23:21:338
1535615993936,2cyclictest1640909-21kworker/u32:5+flush-259:021:15:199
1535637993837,1cyclictest1648128-21kworker/11:0+mm_percpu_wq22:27:053
1535614993837,1cyclictest1745080-21kworker/u32:2+events_unbound22:51:408
1535612993736,1cyclictest1672630-21kworker/u32:0+events_unbound22:20:171
1535637993636,0cyclictest0-21swapper/1100:29:493
1535614993635,1cyclictest1775483-21kworker/u32:3+events_unbound22:57:218
1535614993633,3cyclictest1712236-21ssh22:07:418
1535614993633,3cyclictest0-21swapper/200:12:038
1535637993531,1cyclictest0-21swapper/1100:09:153
1535625993533,2cyclictest1535280-21kworker/u32:2+events_unbound19:25:1913
153561699350,30cyclictest0-21swapper/423:45:1610
1535637993434,0cyclictest0-21swapper/1122:01:293
1535637993433,1cyclictest0-21swapper/1100:01:153
1535637993431,2cyclictest1231ktimers/1100:19:013
153564699330,30cyclictest0-21swapper/1420:55:166
1535614993332,1cyclictest1672630-21kworker/u32:0+events_unbound21:39:088
153561299330,30cyclictest0-21swapper/120:25:151
153565099321,30cyclictest0-21swapper/1522:47:517
1535637993232,0cyclictest0-21swapper/1123:25:153
1535637993232,0cyclictest0-21swapper/1100:14:133
1535637993226,3cyclictest0-21swapper/1123:43:533
1535635993224,8cyclictest0-21swapper/1022:35:162
153563599320,29cyclictest0-21swapper/1019:25:152
1535614993231,1cyclictest1716749-21kworker/u32:1+events_unbound22:18:568
1535614993230,2cyclictest0-21swapper/223:45:408
1535614993230,2cyclictest0-21swapper/222:21:418
1535614993229,3cyclictest0-21swapper/223:19:458
1535614993229,2cyclictest0-21swapper/222:28:358
1535614993228,3cyclictest0-21swapper/223:25:418
153561499320,30cyclictest0-21swapper/221:57:568
153561499320,1cyclictest1736875-21kworker/2:0+mm_percpu_wq22:43:338
1535650993130,1cyclictest1774-21snmpd22:54:067
153565099310,30cyclictest0-21swapper/1520:36:557
153565099310,30cyclictest0-21swapper/1519:29:167
153564699316,14cyclictest0-21swapper/1419:25:556
153564699310,30cyclictest0-21swapper/1422:29:396
153564399310,30cyclictest0-21swapper/1323:45:165
153564399310,30cyclictest0-21swapper/1322:15:235
153564399310,30cyclictest0-21swapper/1321:22:335
153564399310,30cyclictest0-21swapper/1321:22:325
1535640993130,1cyclictest0-21swapper/1219:20:004
153564099310,1cyclictest0-21swapper/1200:06:364
1535637993131,0cyclictest0-21swapper/1123:47:133
1535637993131,0cyclictest0-21swapper/1122:33:193
1535637993131,0cyclictest0-21swapper/1121:15:353
1535637993131,0cyclictest0-21swapper/1119:49:273
1535635993130,1cyclictest1774-21snmpd23:29:432
1535635993130,1cyclictest1743547-21kworker/10:1+events23:38:092
153563599310,30cyclictest0-21swapper/1022:58:362
153563599310,30cyclictest0-21swapper/1021:58:312
153562799310,30cyclictest0-21swapper/821:43:4014
153562599310,30cyclictest0-21swapper/700:16:1213
1535621993130,1cyclictest1774-21snmpd21:54:1612
153562199310,30cyclictest0-21swapper/621:26:2412
153562199310,30cyclictest0-21swapper/621:26:2412
1535619993130,1cyclictest1774-21snmpd22:15:2011
153561999310,30cyclictest0-21swapper/521:24:0311
153561999310,30cyclictest0-21swapper/521:24:0311
153561699310,30cyclictest0-21swapper/419:35:2810
1535615993130,1cyclictest0-21swapper/300:05:179
1535614993131,0cyclictest0-21swapper/221:10:178
1535614993130,0cyclictest0-21swapper/223:43:358
1535614993128,3cyclictest0-21swapper/221:43:398
1535614993128,2cyclictest0-21swapper/200:09:358
153561499310,30cyclictest0-21swapper/200:26:338
153561499310,29cyclictest0-21swapper/223:52:098
153560799310,30cyclictest0-21swapper/023:37:110
153560799310,30cyclictest0-21swapper/019:29:520
1535650993029,1cyclictest1774-21snmpd23:24:257
153564699306,13cyclictest0-21swapper/1421:59:416
153564699306,13cyclictest0-21swapper/1421:15:456
153564699306,13cyclictest0-21swapper/1419:58:526
153564699306,13cyclictest0-21swapper/1419:36:546
153564699306,13cyclictest0-21swapper/1400:33:276
1535646993029,1cyclictest1774-21snmpd21:52:586
153564699300,1cyclictest0-21swapper/1421:45:146
1535643993029,1cyclictest1774-21snmpd23:03:555
1535643993029,1cyclictest0-21swapper/1320:52:355
153564399300,1cyclictest0-21swapper/1320:48:445
1535637993030,0cyclictest1777124-21kworker/11:2-mm_percpu_wq23:18:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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