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2026-03-13 - 16:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 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.

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 rackeslot6s.osadl.org (updated Fri Mar 13, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2519002999081,2cyclictest0-21swapper/010:30:010
2519002998048,26cyclictest20650irq/252-8000000.ethernet09:55:250
2519002998048,26cyclictest20650irq/252-8000000.ethernet09:55:250
2519002998043,32cyclictest20650irq/252-8000000.ethernet10:45:210
2519002997538,32cyclictest20650irq/252-8000000.ethernet09:00:260
2519006997342,28cyclictest2566064-21grep11:45:002
2519002997338,31cyclictest20650irq/252-8000000.ethernet08:30:150
2519002997334,34cyclictest20650irq/252-8000000.ethernet11:55:140
2519002997324,44cyclictest0-21swapper/011:20:280
2519002997036,29cyclictest2540576-21latency_hist09:15:000
2519002996937,29cyclictest0-21swapper/010:05:230
2519002996937,28cyclictest20650irq/252-8000000.ethernet10:00:150
2519002996936,29cyclictest20650irq/252-8000000.ethernet10:20:160
251900299691,31cyclictest0-21swapper/008:30:020
251900299691,31cyclictest0-21swapper/008:30:010
2519002996824,39cyclictest0-21swapper/009:45:200
2519006996730,33cyclictest0-21swapper/212:10:252
2519006996729,33cyclictest0-21swapper/208:00:272
2519002996738,25cyclictest20650irq/252-8000000.ethernet08:15:220
2519002996738,24cyclictest20650irq/252-8000000.ethernet07:50:220
2519002996738,24cyclictest167350irq/118-8000000.ethernet-tx009:15:240
2519002996737,26cyclictest20650irq/252-8000000.ethernet11:44:590
2519002996734,29cyclictest2542644-21perl09:25:200
2519002996640,22cyclictest20650irq/252-8000000.ethernet07:15:240
2519002996639,23cyclictest20650irq/252-8000000.ethernet09:50:160
251900299662,5cyclictest2525778-21ptp4l07:45:260
2519006996522,10cyclictest2544212-21/usr/sbin/munin09:35:092
2519002996546,15cyclictest20650irq/252-8000000.ethernet10:40:210
2519002996531,30cyclictest0-21swapper/008:05:270
2519002996524,34cyclictest2527740-21grep07:55:270
2519002996443,18cyclictest2573838-21munin-plugin-st12:29:590
2519002996437,24cyclictest20650irq/252-8000000.ethernet08:50:250
2519002996431,26cyclictest2569707-21df_inode12:05:160
2519003996330,29cyclictest0-21swapper/109:50:001
2519002996341,17cyclictest20650irq/252-8000000.ethernet11:25:170
2519002996333,25cyclictest2542439-21cut09:25:010
2519002996330,29cyclictest2564198-21/usr/sbin/munin11:30:270
2519002996325,34cyclictest0-21swapper/009:30:280
2519002996325,34cyclictest0-21swapper/009:30:280
251900299632,4cyclictest2571467-21df12:15:170
2519002996320,39cyclictest2531930-21unixbench_multi08:20:270
2519006996225,4cyclictest0-21swapper/209:40:272
2519003996231,26cyclictest2566010-21grep11:40:281
2519003996219,9cyclictest2526013-21munin-plugin-st07:50:001
2519002996239,20cyclictest20650irq/252-8000000.ethernet11:05:150
2519002996238,21cyclictest20650irq/252-8000000.ethernet08:35:270
2519002996238,20cyclictest20650irq/252-8000000.ethernet10:15:230
2519002996236,23cyclictest20650irq/252-8000000.ethernet10:10:170
2519002996236,23cyclictest20650irq/252-8000000.ethernet10:10:170
2519002996230,28cyclictest20850irq/208-8000000.ethernet09:35:240
2519002996229,29cyclictest20850irq/208-8000000.ethernet08:05:010
2519002996225,33cyclictest0-21swapper/008:10:280
2519002996217,39cyclictest0-21swapper/011:45:300
2519003996127,5cyclictest2535296-21grep08:40:281
2519003996127,28cyclictest0-21swapper/112:10:251
2519003996123,7cyclictest2557468-21grep10:50:261
2519003996123,7cyclictest2557468-21grep10:50:261
2519003996123,4cyclictest0-21swapper/111:40:001
2519003996122,6cyclictest2548131-21grep09:55:281
2519003996122,6cyclictest2548131-21grep09:55:281
2519003996118,9cyclictest0-21swapper/108:50:281
2519002996135,23cyclictest20650irq/252-8000000.ethernet11:35:190
2519006996033,24cyclictest2540448-21cron09:15:002
2519006996029,26cyclictest0-21swapper/208:10:212
2519002996039,17cyclictest20650irq/252-8000000.ethernet12:20:150
2519002996039,17cyclictest20650irq/252-8000000.ethernet12:20:140
2519002996038,19cyclictest20650irq/252-8000000.ethernet11:50:200
2519002996036,21cyclictest20650irq/252-8000000.ethernet08:40:230
2519002996035,20cyclictest20650irq/252-8000000.ethernet10:35:120
2519002996035,20cyclictest20650irq/252-8000000.ethernet10:35:120
2519006995924,4cyclictest2543050-21grep09:25:272
2519002995927,29cyclictest20850irq/208-8000000.ethernet07:10:170
2519006995827,4cyclictest0-21swapper/210:25:192
2519006995823,8cyclictest0-21swapper/208:40:282
2519003995824,29cyclictest0-21swapper/109:20:271
2519002995816,4cyclictest0-21swapper/012:10:270
2519002995741,12cyclictest20650irq/252-8000000.ethernet09:05:190
2519002995741,12cyclictest20650irq/252-8000000.ethernet09:05:180
251900299571,54cyclictest20850irq/208-8000000.ethernet08:50:000
251900699564,32cyclictest0-21swapper/210:00:012
251900699564,32cyclictest0-21swapper/210:00:012
2519006995626,5cyclictest2573748-21grep12:25:302
2519006995624,8cyclictest0-21swapper/207:15:272
2519002995630,20cyclictest2523085-21interrupts07:30:220
2519002995630,20cyclictest2523085-21interrupts07:30:220
2519002995629,24cyclictest20850irq/208-8000000.ethernet10:55:240
2519002995624,29cyclictest20850irq/208-8000000.ethernet10:35:000
2519002995612,37cyclictest0-21swapper/011:05:010
2519003995524,7cyclictest0-21swapper/109:30:281
2519003995524,7cyclictest0-21swapper/109:30:271
2519003995520,8cyclictest0-21swapper/111:30:171
2519002995536,15cyclictest2575275-21ps12:35:270
2519002995531,21cyclictest0-21swapper/012:00:250
2519002995531,21cyclictest0-21swapper/012:00:250
2519002995524,27cyclictest2524024-21cut07:35:260
2519002995515,3cyclictest2545720-21wc09:45:010
2519002995515,36cyclictest0-21swapper/012:30:270
251900299551,51cyclictest0-21swapper/007:40:180
2519003995422,8cyclictest2524199-21grep07:35:271
2519003995422,5cyclictest0-21swapper/111:15:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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