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2025-10-20 - 06:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot6s.osadl.org (updated Mon Oct 20, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210362116104,6sleep30-21swapper/319:06:423
211582115104,6sleep00-21swapper/019:08:140
19624210983,18sleep10-21swapper/119:05:151
2129229777,15sleep20-21swapper/219:09:562
98212780,1sleep10-21swapper/123:26:151
288622760,0sleep00-21swapper/021:34:020
81442690,0sleep30-21swapper/321:45:163
113682670,1sleep3381ktimersoftd/300:01:003
223882570,1sleep20-21swapper/220:30:172
305912290,1sleep20-21swapper/219:30:192
305642290,1sleep0101ktimersoftd/023:15:160
256872220,1sleep20-21swapper/222:03:542
2132599221,19cyclictest23672-21ssh22:35:132
2132599210,19cyclictest0-21swapper/221:45:112
2132599210,19cyclictest0-21swapper/220:10:132
2132599210,19cyclictest0-21swapper/219:45:142
2132599201,18cyclictest0-21swapper/220:55:152
297492190,1sleep0101ktimersoftd/019:30:130
21326991916,2cyclictest31653-21kworker/u8:022:22:053
21324991916,2cyclictest16214-21kworker/u8:121:25:041
21324991914,3cyclictest31653-21kworker/u8:022:13:051
21326991814,2cyclictest0-21swapper/323:44:553
83102170,1sleep30-21swapper/323:58:473
21324991714,2cyclictest0-21swapper/122:52:521
21323991714,2cyclictest31653-21kworker/u8:022:38:020
21326991613,2cyclictest14755-21kworker/u8:122:00:043
21326991613,2cyclictest10322-21kworker/u8:021:19:043
2132699161,13cyclictest326552sleep322:44:193
21325991612,2cyclictest17009-21ssh21:55:132
2132599161,13cyclictest8288-21taskset00:31:082
21324991612,3cyclictest21973-21turbostat23:44:551
21324991611,3cyclictest22679-21kworker/u8:221:49:051
2132499160,14cyclictest5032-21diskmemload00:26:021
202492160,1sleep10-21swapper/100:10:231
45452150,0sleep10-21swapper/122:15:151
21326991512,2cyclictest11123-21kworker/u8:100:14:063
21326991512,2cyclictest10322-21kworker/u8:021:20:053
2132699151,12cyclictest29136-21ssh21:34:273
2132699151,12cyclictest0-21swapper/321:36:493
2132699150,3cyclictest2000-21ssh22:12:243
2132699150,2cyclictest0-21swapper/321:25:043
2132699150,13cyclictest26024-21fschecks_count19:20:163
2132699150,13cyclictest0-21swapper/323:15:383
21325991512,2cyclictest0-21swapper/223:01:042
21325991510,3cyclictest0-21swapper/221:39:372
2132599150,13cyclictest5032-21diskmemload22:41:532
2132599150,13cyclictest0-21swapper/220:45:242
2132599150,13cyclictest0-21swapper/200:24:232
21324991512,2cyclictest0-21swapper/122:21:231
21324991512,2cyclictest0-21swapper/121:14:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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