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2026-05-14 - 22:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Thu May 14, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25353991043,81cyclictest8937-21runrttasks07:17:461
25354999934,10cyclictest0-21swapper/207:15:232
2535499934,36cyclictest0-21swapper/207:42:062
2535499934,27cyclictest0-21swapper/209:07:172
2535499914,27cyclictest0-21swapper/206:07:142
25354999119,24cyclictest0-21swapper/209:06:182
2535499904,29cyclictest0-21swapper/210:02:072
2535499894,27cyclictest0-21swapper/208:53:472
25354998918,12cyclictest0-21swapper/208:27:012
25354998917,13cyclictest0-21swapper/209:52:172
25354998917,13cyclictest0-21swapper/209:52:172
2535499884,38cyclictest0-21swapper/207:37:112
2535499884,38cyclictest0-21swapper/207:07:042
2535499884,38cyclictest0-21swapper/207:07:042
2535499884,34cyclictest0-21swapper/207:49:412
2535499884,28cyclictest0-21swapper/206:47:222
2535499884,27cyclictest0-21swapper/206:37:092
2535499884,13cyclictest0-21swapper/205:52:112
25354998826,12cyclictest0-21swapper/209:17:192
25354998812,23cyclictest0-21swapper/207:52:072
2535499874,27cyclictest0-21swapper/208:47:082
2535499873,39cyclictest0-21swapper/208:12:122
25354998729,13cyclictest0-21swapper/204:52:162
2535499864,29cyclictest0-21swapper/208:07:252
2535399863,44cyclictest121850irq/46-eth009:45:351
2535499854,36cyclictest0-21swapper/207:02:042
2535499854,27cyclictest0-21swapper/206:42:102
2535499854,25cyclictest0-21swapper/208:45:202
25354998531,10cyclictest27111-21unixbench_singl06:57:252
2535399854,74cyclictest27550-21fschecks_time09:22:051
2535399854,60cyclictest0-21swapper/109:21:361
2535499843,32cyclictest0-21swapper/209:23:442
2535399844,72cyclictest1419-21runrttasks10:02:061
2535399844,61cyclictest0-21swapper/107:50:121
2535399843,73cyclictest7987-21sendmail_mailqu08:52:171
2535399843,72cyclictest4315-21ssh07:12:081
2535499834,28cyclictest0-21swapper/209:27:002
2535499834,19cyclictest0-21swapper/207:17:112
25354998327,12cyclictest0-21swapper/208:21:492
2535399834,71cyclictest0-21swapper/108:19:501
2535399834,71cyclictest0-21swapper/106:48:531
2535399833,71cyclictest11013-21irqstats05:22:161
2535399833,48cyclictest12539-21kworker/1:107:22:231
25353998313,43cyclictest0-21swapper/108:31:161
2535499823,28cyclictest0-21swapper/208:22:062
25354998227,10cyclictest23111-21crond09:16:462
25354998227,10cyclictest23111-21crond09:16:462
2535399825,63cyclictest0-21swapper/107:07:101
2535399825,63cyclictest0-21swapper/107:07:101
2535399824,71cyclictest0-21swapper/108:09:431
2535399824,71cyclictest0-21swapper/107:37:091
2535399823,73cyclictest0-21swapper/109:51:541
2535399823,73cyclictest0-21swapper/109:51:541
2535399823,73cyclictest0-21swapper/108:46:311
2535399823,72cyclictest30363-21cpuspeed09:26:581
2535399823,72cyclictest19391-21gltestperf08:22:071
2535399823,71cyclictest19145-21ssh07:32:551
2535399823,70cyclictest0-21swapper/108:39:571
2535499813,26cyclictest0-21swapper/210:06:562
2535399816,60cyclictest0-21swapper/109:31:571
2535399813,71cyclictest0-21swapper/108:58:431
2535399813,69cyclictest29654-21awk10:12:131
25354998028,14cyclictest0-21swapper/205:37:112
2535399804,68cyclictest0-21swapper/105:42:131
2535399804,55cyclictest0-21swapper/109:57:191
2535399804,55cyclictest0-21swapper/109:57:191
2535399804,44cyclictest0-21swapper/109:47:121
2535399803,71cyclictest0-21swapper/106:52:091
2535399803,70cyclictest4248-21sendmail_mailqu05:07:241
2535399803,70cyclictest4248-21sendmail_mailqu05:07:241
2535399803,70cyclictest20351-21tr09:11:591
2535399803,70cyclictest20351-21tr09:11:591
2535399803,64cyclictest0-21swapper/107:03:391
2535399803,43cyclictest0-21swapper/107:52:181
2535399794,68cyclictest0-21swapper/109:05:421
2535399794,56cyclictest28441-21ssh07:01:291
2535399793,69cyclictest282001ssh08:36:071
2535399793,69cyclictest282001ssh08:36:071
2535399793,69cyclictest0-21swapper/108:50:481
2535399793,68cyclictest0-21swapper/108:02:341
2535499784,26cyclictest0-21swapper/209:46:232
2535399784,67cyclictest0-21swapper/105:32:271
2535399784,66cyclictest24594-21grep07:42:051
2535399784,58cyclictest0-21swapper/110:07:121
2535399783,59cyclictest12726-21ssh08:12:091
2535399783,54cyclictest0-21swapper/105:37:061
2535399783,47cyclictest4118-21ssh07:59:251
2535499774,26cyclictest0-21swapper/208:35:232
2535499774,26cyclictest0-21swapper/208:35:232
2535499773,27cyclictest0-21swapper/207:26:542
2535399774,57cyclictest0-21swapper/104:51:571
2535399774,55cyclictest0-21swapper/109:40:141
2535399774,37cyclictest16635-21munin-node09:07:111
2535399773,52cyclictest22677-21fschecks_time05:47:111
2535399773,52cyclictest22677-21fschecks_time05:47:111
2535399764,64cyclictest29826-21fschecks_time06:02:121
2535399763,66cyclictest0-21swapper/107:30:561
2535399763,65cyclictest7801-21cpu05:17:081
2535499754,24cyclictest0-21swapper/209:00:192
2535399754,64cyclictest1219-21munin-run06:11:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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