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2026-06-17 - 04:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 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 rackeslot5s.osadl.org (updated Wed Jun 17, 2026 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9500992921,7cyclictest26965-21grep00:35:002
9500992819,4cyclictest0-21swapper/221:12:562
950099280,1cyclictest2710-21diskmemload22:00:352
950099280,1cyclictest17658-21vmstat23:55:062
950099280,0cyclictest2710-21diskmemload23:31:282
950099270,2cyclictest18752-21ssh00:27:242
9500992621,4cyclictest27522-21apt-get22:34:552
950099260,25cyclictest0-21swapper/223:53:422
950199250,24cyclictest2710-21diskmemload23:27:123
950199250,24cyclictest2710-21diskmemload22:26:483
950199250,24cyclictest2710-21diskmemload22:26:483
9500992520,4cyclictest13420-21ssh00:22:202
9500992520,4cyclictest0-21swapper/223:16:252
9500992519,5cyclictest3156-21ssh22:10:232
9500992519,5cyclictest14544-21apt-get20:29:542
950099250,25cyclictest0-21swapper/200:19:332
950099250,24cyclictest2710-21diskmemload23:43:462
950099250,24cyclictest0-21swapper/223:02:082
950099250,24cyclictest0-21swapper/222:05:432
950099250,24cyclictest0-21swapper/200:01:102
950099250,0cyclictest2710-21diskmemload22:36:202
950099250,0cyclictest24147-21apt-get20:49:552
949999250,24cyclictest0-21swapper/122:00:471
949999250,1cyclictest0-21swapper/122:50:111
9498992523,1cyclictest0-21swapper/022:27:440
9498992523,1cyclictest0-21swapper/022:27:440
949899250,24cyclictest2710-21diskmemload23:04:120
949899250,24cyclictest2710-21diskmemload22:21:470
949899250,24cyclictest0-21swapper/023:33:220
949899250,1cyclictest2710-21diskmemload00:13:480
949899250,1cyclictest24222-21perf19:40:010
949899250,0cyclictest0-21swapper/021:18:580
9501992423,1cyclictest0-21swapper/322:10:123
950199240,24cyclictest28598-21ssh00:05:283
950199240,23cyclictest0-21swapper/300:32:453
9500992423,0cyclictest0-21swapper/223:24:552
9500992420,3cyclictest0-21swapper/221:30:172
9500992419,5cyclictest0-21swapper/220:25:012
9500992419,4cyclictest3266-21rm00:13:022
9500992419,4cyclictest21272-21ssh21:27:302
950099240,24cyclictest0-21swapper/223:36:032
950099240,23cyclictest0-21swapper/222:47:142
950099240,0cyclictest0-21swapper/223:25:162
950099240,0cyclictest0-21swapper/222:43:452
950099240,0cyclictest0-21swapper/200:09:062
9499992424,0cyclictest0-21swapper/122:12:451
9499992424,0cyclictest0-21swapper/100:26:411
9499992420,1cyclictest0-21swapper/123:29:541
949999240,23cyclictest2710-21diskmemload23:49:241
949999240,23cyclictest2710-21diskmemload23:19:391
949999240,23cyclictest0-21swapper/121:51:071
949999240,23cyclictest0-21swapper/100:31:531
949999240,1cyclictest0-21swapper/123:57:581
949999240,0cyclictest2710-21diskmemload22:22:141
949999240,0cyclictest0-21swapper/122:59:521
949999240,0cyclictest0-21swapper/122:43:501
9498992424,0cyclictest2710-21diskmemload21:50:540
9498992423,1cyclictest36942sleep023:42:530
9498992422,2cyclictest16018-21ssh22:54:250
9498992422,1cyclictest18601-21cron21:25:000
949899240,23cyclictest2710-21diskmemload21:10:590
949899240,23cyclictest0-21swapper/023:18:360
949899240,23cyclictest0-21swapper/022:33:450
949899240,0cyclictest27533-21ssh22:04:180
949899240,0cyclictest0-21swapper/022:42:180
9501992323,0cyclictest0-21swapper/323:31:103
9501992323,0cyclictest0-21swapper/322:55:113
9501992323,0cyclictest0-21swapper/322:30:313
950199232,21cyclictest9915-21ssh21:16:243
9501992321,1cyclictest32530-21apt-get19:59:543
9501992321,1cyclictest0-21swapper/323:58:133
9501992321,1cyclictest0-21swapper/323:47:003
9501992321,1cyclictest0-21swapper/323:39:483
950199230,2cyclictest8506-21ssh00:17:553
950199230,2cyclictest14550-21ssh00:24:043
950199230,23cyclictest0-21swapper/323:18:583
950199230,23cyclictest0-21swapper/322:35:303
950199230,23cyclictest0-21swapper/321:48:543
950199230,22cyclictest6032-21ssh21:13:373
950199230,22cyclictest3249-21sh21:40:053
950199230,22cyclictest29827-21ssh23:05:283
950199230,22cyclictest28872-21perf22:05:003
950199230,22cyclictest22905-21unixbench-2d00:00:033
950199230,22cyclictest17153-21ssh21:54:543
950199230,22cyclictest10425-21ssh22:49:043
950199230,1cyclictest2710-21diskmemload21:34:593
950199230,0cyclictest2710-21diskmemload23:52:233
950199230,0cyclictest2710-21diskmemload21:36:053
950199230,0cyclictest25802-21ssh23:02:273
9500992323,0cyclictest2710-21diskmemload21:18:002
9500992321,1cyclictest2576-21mailstats21:40:012
9500992320,3cyclictest0-21swapper/222:59:312
9500992320,3cyclictest0-21swapper/222:22:312
9500992319,3cyclictest2710-21diskmemload21:40:382
950099231,1cyclictest24248-21sendmail-msp19:40:012
950099230,2cyclictest29575-21rm23:05:072
950099230,23cyclictest0-21swapper/222:25:322
950099230,23cyclictest0-21swapper/222:25:322
950099230,23cyclictest0-21swapper/200:35:062
950099230,22cyclictest2710-21diskmemload22:16:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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