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2025-01-20 - 21:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 50 highest latencies:
System rackcslot7s.osadl.org (updated Mon Jan 20, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
250486221120,9sleep02504866-21latency07:05:190
1623991070,5rtkit-daemon0-21swapper/312:02:313
252721421030,4chrt2527215-21if_enp2s008:10:172
1623991030,5rtkit-daemon0-21swapper/311:48:563
1623991030,5rtkit-daemon0-21swapper/311:48:563
162399920,5rtkit-daemon0-21swapper/212:06:483
162399910,9rtkit-daemon1622-21rtkit-daemon07:17:391
162399910,5rtkit-daemon0-21swapper/208:19:453
162399880,5rtkit-daemon2197014-21PK-Backend11:14:413
25043442830,7sleep10-21swapper/107:05:121
162399810,5rtkit-daemon0-21swapper/307:30:293
162399800,6rtkit-daemon0-21swapper/309:33:593
162399800,10rtkit-daemon1753-21gnome-shell09:10:502
25406512790,7sleep02197014-21PK-Backend08:50:240
250573527960,13sleep20-21swapper/207:09:122
162399790,6rtkit-daemon2197014-21PK-Backend10:36:512
250592799782,48cyclictest1753-21gnome-shell08:05:390
162399780,9rtkit-daemon1622-21rtkit-daemon08:48:391
162399780,10rtkit-daemon1753-21gnome-shell11:40:442
250592799772,55cyclictest1753-21gnome-shell09:50:020
250551427757,14sleep30-21swapper/307:06:323
162399770,6rtkit-daemon2197014-21PK-Backend08:20:252
162399770,5rtkit-daemon0-21swapper/211:19:162
25335562760,4sleep30-21swapper/308:30:023
2505934997662,9cyclictest34-21ksoftirqd/207:26:552
250592799762,33cyclictest869-21irqbalance08:20:140
2505927997614,44cyclictest1069-21runrttasks07:22:090
162399760,6rtkit-daemon2197014-21PK-Backend08:53:103
162399760,6rtkit-daemon0-21swapper/311:07:073
162399760,5rtkit-daemon0-21swapper/210:51:412
250592799752,49cyclictest1753-21gnome-shell08:15:190
250592799752,48cyclictest1753-21gnome-shell11:46:280
250592799752,48cyclictest1753-21gnome-shell11:46:280
250592799752,47cyclictest1753-21gnome-shell10:20:200
250592799752,45cyclictest1753-21gnome-shell09:30:020
250592799751,49cyclictest2572269-40apt-check10:36:230
250592799751,49cyclictest2564712-21taskset10:14:550
250592799751,46cyclictest2583674-21awk11:15:280
162399750,6rtkit-daemon2197014-21PK-Backend10:13:533
162399750,6rtkit-daemon2197014-21PK-Backend08:54:282
162399750,6rtkit-daemon2197014-21PK-Backend07:48:412
250592799742,47cyclictest1753-21gnome-shell09:12:200
250592799741,48cyclictest2572889-21apt10:40:130
250592799741,48cyclictest2572889-21apt10:40:120
2505927997413,41cyclictest13-21ksoftirqd/008:47:300
162399740,8rtkit-daemon1622-21rtkit-daemon09:14:371
162399740,6rtkit-daemon2197014-21PK-Backend08:09:022
162399740,5rtkit-daemon0-21swapper/210:16:162
250592799732,49cyclictest2586753-40apt-check11:27:220
250592799732,49cyclictest2570507-21taskset10:34:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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