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2026-08-07 - 20:16

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 Fri Aug 07, 2026 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3143999270,26cyclictest25161-21diskmemload12:10:210
3144299250,24cyclictest25688-21ssh10:38:463
31441992520,2cyclictest29353-21sh09:43:242
3144099250,24cyclictest0-21swapper/110:14:081
3143999250,24cyclictest0-21swapper/010:57:080
31442992424,0cyclictest0-21swapper/311:31:553
3144299240,23cyclictest25161-21diskmemload09:16:073
3144299240,23cyclictest0-21swapper/311:42:083
3144299240,23cyclictest0-21swapper/309:30:043
31441992422,1cyclictest21492-21users10:04:182
31441992422,1cyclictest0-21swapper/210:43:072
31441992420,2cyclictest0-21swapper/211:35:562
3144199241,2cyclictest10060-21munin-node07:55:012
3144199240,23cyclictest7204-21ssh09:52:102
3144199240,23cyclictest0-21swapper/211:29:052
3144199240,0cyclictest0-21swapper/210:39:122
31440992422,1cyclictest15367-21ssh11:26:501
31440992421,2cyclictest5428-21ssh12:16:031
3144099240,24cyclictest0-21swapper/109:22:221
3144099240,23cyclictest622-21gdbus12:40:001
3144099240,23cyclictest25161-21diskmemload12:04:581
3144099240,23cyclictest25161-21diskmemload09:35:421
3144099240,23cyclictest0-21swapper/112:31:061
3144099240,0cyclictest25161-21diskmemload11:56:241
3144099240,0cyclictest0-21swapper/110:40:591
31439992424,0cyclictest0-21swapper/011:33:050
31439992423,1cyclictest7859-21ssh11:20:000
31439992423,1cyclictest0-21swapper/009:29:100
31439992422,1cyclictest0-21swapper/011:25:020
31439992421,2cyclictest606-21dbus-daemon11:25:000
31439992421,2cyclictest0-21swapper/011:14:590
31439992421,2cyclictest0-21swapper/009:59:320
3143999240,24cyclictest0-21swapper/009:31:240
3143999240,23cyclictest23788-21date11:05:010
3143999240,23cyclictest23506-21ssh09:37:560
3143999240,23cyclictest13527-21sh10:27:230
3143999240,23cyclictest0-21swapper/012:30:380
3143999240,23cyclictest0-21swapper/010:43:260
3143999240,23cyclictest0-21swapper/009:10:430
31442992323,0cyclictest0-21swapper/312:05:183
31442992323,0cyclictest0-21swapper/311:19:083
31442992323,0cyclictest0-21swapper/310:55:133
31442992322,1cyclictest25161-21diskmemload12:02:263
31442992322,1cyclictest25161-21diskmemload11:01:423
31442992321,1cyclictest3357-21sh10:47:163
31442992321,1cyclictest23822-21sh12:33:293
31442992321,1cyclictest0-21swapper/311:51:413
31442992321,1cyclictest0-21swapper/311:29:393
31442992320,2cyclictest6764-21rm10:20:353
31442992320,2cyclictest28848-21ssh10:11:403
31442992320,2cyclictest28595-21ssh12:37:153
31442992320,2cyclictest17579-21ssh10:30:163
31442992320,2cyclictest1586-21seq10:16:123
3144299230,23cyclictest25161-21diskmemload09:37:063
3144299230,23cyclictest0-21swapper/311:10:493
3144299230,22cyclictest7588-21ssh10:50:223
3144299230,22cyclictest29738-21sh10:41:433
3144299230,22cyclictest25161-21diskmemload09:51:503
3144299230,22cyclictest25161-21diskmemload09:40:363
3144299230,0cyclictest0-21swapper/311:59:453
3144299230,0cyclictest0-21swapper/310:07:343
31441992323,0cyclictest0-21swapper/212:24:402
31441992323,0cyclictest0-21swapper/210:16:132
31441992323,0cyclictest0-21swapper/208:54:072
31441992322,1cyclictest27555-21ssh12:07:122
31441992322,1cyclictest25161-21diskmemload09:38:392
31441992322,1cyclictest0-21swapper/211:11:112
31441992321,1cyclictest0-21swapper/211:32:422
31441992321,1cyclictest0-21swapper/211:02:542
3144199230,23cyclictest25161-21diskmemload12:11:302
3144199230,23cyclictest25161-21diskmemload10:09:202
3144199230,23cyclictest25161-21diskmemload09:14:492
3144199230,23cyclictest0-21swapper/212:02:562
3144199230,23cyclictest0-21swapper/211:55:462
3144199230,22cyclictest22839-21munin-run10:35:002
3144199230,22cyclictest1975-21ssh10:45:192
3144199230,22cyclictest10720-21basename08:40:012
3144199230,22cyclictest10028-21ssh11:22:462
3144199230,22cyclictest0-21swapper/211:40:482
3144199230,1cyclictest0-21swapper/211:16:032
3144199230,0cyclictest0-21swapper/212:34:582
3144199230,0cyclictest0-21swapper/209:30:132
3144199230,0cyclictest0-21swapper/209:10:002
31440992323,0cyclictest0-21swapper/111:13:341
31440992323,0cyclictest0-21swapper/110:34:161
31440992323,0cyclictest0-21swapper/110:22:061
31440992323,0cyclictest0-21swapper/110:07:001
31440992323,0cyclictest0-21swapper/110:01:161
31440992323,0cyclictest0-21swapper/109:46:311
31440992323,0cyclictest0-21swapper/109:40:361
31440992321,1cyclictest606-21dbus-daemon08:05:001
31440992321,1cyclictest23052-21ssh10:35:041
31440992321,1cyclictest0-21swapper/111:45:231
31440992321,1cyclictest0-21swapper/111:35:401
31440992321,1cyclictest0-21swapper/110:25:591
31440992321,1cyclictest0-21swapper/109:52:171
31440992321,1cyclictest0-21swapper/109:20:011
3144099230,2cyclictest25161-21diskmemload09:26:511
3144099230,23cyclictest25161-21diskmemload11:30:391
3144099230,22cyclictest0-21swapper/112:08:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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