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2025-09-18 - 15:26

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 Thu Sep 18, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
371977899686,28cyclictest22-21rcuc/119:50:011
3719776996323,7cyclictest0-21swapper/020:30:130
3719776996323,7cyclictest0-21swapper/020:30:130
3719781996016,19cyclictest3737205-21/usr/sbin/munin20:50:232
3719776995849,5cyclictest3735319-21munin-plugin-st20:39:590
371978199548,19cyclictest3727914-21/usr/sbin/munin19:55:192
371977699542,23cyclictest3719771-21cyclictest22:45:010
3719781995332,13cyclictest311ktimers/200:00:102
371978199521,29cyclictest0-21swapper/219:50:012
3719778995242,5cyclictest3759600-21munin-plugin-st23:09:591
3719778995235,9cyclictest0-21swapper/123:15:011
3719781995141,6cyclictest3738582-21grep20:55:292
371977699512,14cyclictest3739662-21gpgv21:05:020
3719778994941,4cyclictest3775081-21latency_hist00:39:591
371977899491,8cyclictest0-21swapper/119:35:011
3719781994830,13cyclictest311ktimers/223:45:142
371977699487,34cyclictest3732676-21grep20:20:290
3719781994727,15cyclictest311ktimers/223:40:142
371977899479,8cyclictest24-21ksoftirqd/120:15:011
3719778994714,16cyclictest22-21rcuc/123:45:011
3719776994736,6cyclictest3754374-21grep22:35:310
3719776994732,10cyclictest0-21swapper/022:10:010
3719776994729,9cyclictest0-21swapper/023:00:200
3719781994634,8cyclictest3774960-21grep00:35:282
3719776994640,4cyclictest0-21swapper/020:55:120
371977699461,5cyclictest0-21swapper/022:25:140
371977699461,11cyclictest0-21swapper/000:15:020
3719778994533,4cyclictest0-21swapper/119:40:211
371977699452,26cyclictest15-21rcuc/019:35:020
3719778994431,6cyclictest0-21swapper/100:15:321
3719778994416,17cyclictest231ktimers/123:35:011
3719776994434,6cyclictest0-21swapper/023:55:120
3719781994329,10cyclictest3735313-21sendmail20:40:002
3719781994325,13cyclictest311ktimers/219:15:142
3719778994324,11cyclictest0-21swapper/123:20:281
3719776994337,4cyclictest3761290-21sendmail23:19:590
3719776994332,8cyclictest1-21systemd23:30:010
3719776994332,8cyclictest1-21systemd23:30:010
3719776994329,8cyclictest0-21swapper/021:55:250
3719776994329,8cyclictest0-21swapper/021:35:000
371978199424,27cyclictest32-21ksoftirqd/220:15:012
3719781994218,18cyclictest32-21ksoftirqd/200:20:192
3719778994229,7cyclictest0-21swapper/123:20:001
3719778994228,8cyclictest3751921-21munin-plugin-st22:25:001
3719778994211,25cyclictest231ktimers/120:35:271
371977699424,35cyclictest0-21swapper/023:45:220
3719776994235,4cyclictest20750irq/251-8000000.ethernet00:25:140
3719776994229,8cyclictest0-21swapper/019:30:000
3719781994130,5cyclictest0-21swapper/223:15:292
3719781994129,9cyclictest3733419-21ptp4l-jitter20:25:272
3719781994128,7cyclictest3771522-21sendmail00:19:592
3719781994119,14cyclictest311ktimers/222:15:152
3719781994114,13cyclictest311ktimers/219:30:152
3719778994132,4cyclictest0-21swapper/120:50:331
3719778994125,9cyclictest0-21swapper/121:40:271
3719778994125,10cyclictest0-21swapper/121:20:191
371977899411,2cyclictest0-21swapper/121:30:001
371977699415,2cyclictest0-21swapper/021:55:020
3719776994135,3cyclictest20750irq/251-8000000.ethernet22:20:160
3719776994127,9cyclictest0-21swapper/023:30:240
371978199406,21cyclictest3754654-21/usr/sbin/munin22:40:192
3719781994031,4cyclictest0-21swapper/222:20:322
3719781994025,12cyclictest311ktimers/222:25:152
3719781994024,11cyclictest311ktimers/220:20:112
3719781994019,15cyclictest311ktimers/220:05:142
3719781994014,13cyclictest311ktimers/221:35:172
3719778994032,5cyclictest231ktimers/121:35:271
3719778994032,4cyclictest0-21swapper/123:55:221
3719778994030,5cyclictest0-21swapper/122:05:301
3719778994024,10cyclictest0-21swapper/120:30:271
3719778994024,10cyclictest0-21swapper/120:30:271
3719778994022,9cyclictest0-21swapper/120:45:001
3719776994029,8cyclictest3774192-21/usr/sbin/munin00:30:310
371977699402,8cyclictest0-21swapper/021:45:000
371977699401,35cyclictest3726039-21grep19:45:000
3719781993931,5cyclictest168450irq/135-8000000.ethernet-tx221:55:212
3719781993926,8cyclictest0-21swapper/219:35:282
3719781993925,6cyclictest0-21swapper/220:45:292
3719781993912,13cyclictest311ktimers/219:10:132
371977899399,2cyclictest0-21swapper/121:20:001
3719778993931,3cyclictest0-21swapper/100:15:021
3719778993922,9cyclictest0-21swapper/122:00:281
3719778993922,6cyclictest0-21swapper/119:15:231
371977899391,4cyclictest0-21swapper/122:45:011
371977899391,2cyclictest0-21swapper/100:10:011
3719776993931,5cyclictest293-21systemd-journal23:40:000
3719776993919,4cyclictest27250irq/343-wl18xx20:15:210
3719776993919,4cyclictest27250irq/343-wl18xx20:15:200
3719781993828,5cyclictest0-21swapper/219:50:242
3719781993827,5cyclictest168450irq/135-8000000.ethernet-tx200:33:152
3719781993822,8cyclictest0-21swapper/222:45:272
3719781993821,11cyclictest311ktimers/221:40:142
3719781993820,10cyclictest0-21swapper/221:00:262
3719778993831,4cyclictest231ktimers/100:35:001
3719778993828,7cyclictest231ktimers/122:45:211
3719778993828,5cyclictest0-21swapper/123:00:001
3719778993827,8cyclictest3751071-21munin-plugin-st22:20:001
3719778993823,5cyclictest0-21swapper/119:20:201
3719776993832,4cyclictest20950irq/209-8000000.ethernet19:20:250
3719776993828,6cyclictest3750180-21grep22:10:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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