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2026-04-30 - 13:37

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 Apr 30, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2580209998578,4cyclictest15-21rcuc/020:05:000
2580212997756,15cyclictest0-21swapper/122:20:011
258021299653,19cyclictest2584126-21/usr/sbin/munin19:30:191
2580209996055,2cyclictest0-21swapper/000:30:060
258021399581,34cyclictest0-21swapper/222:25:012
258021399573,32cyclictest14-21rcu_preempt00:40:012
258020999531,50cyclictest0-21swapper/019:10:110
2580213995223,15cyclictest30-21rcuc/222:40:012
2580209995034,13cyclictest15-21rcuc/023:20:120
2580209995031,16cyclictest167350irq/118-8000000.ethernet-tx022:20:290
258020999501,8cyclictest2612223-21latency_hist22:30:010
2580212994937,9cyclictest0-21swapper/119:30:011
2580212994913,4cyclictest2605287-21apt-get21:35:021
258020999498,9cyclictest2625289-21apt-get00:30:010
2580213994841,5cyclictest311ktimers/222:10:152
2580213994838,6cyclictest2588087-21grep19:50:272
2580209994816,28cyclictest15-21rcuc/019:40:210
258020999475,4cyclictest0-21swapper/019:55:010
258020999472,6cyclictest2602667-21munin-run21:20:010
258021399466,29cyclictest30-21rcuc/219:20:022
2580213994634,8cyclictest0-21swapper/200:30:272
2580213994631,11cyclictest2623147-21cat00:10:012
2580213994630,9cyclictest2623857-21grep00:10:272
2580212994632,9cyclictest0-21swapper/120:35:001
2580209994630,11cyclictest0-21swapper/020:15:270
258020999462,6cyclictest1321-21sendmail-mta20:33:120
258020999462,5cyclictest2582520-21sh19:20:180
2580209994623,15cyclictest131ktimers/021:40:120
2580212994536,5cyclictest2613055-21munin-plugin-st22:35:001
258020999455,27cyclictest15-21rcuc/023:45:010
2580209994539,3cyclictest0-21swapper/023:40:020
2580209994539,3cyclictest0-21swapper/021:25:270
2580209994538,4cyclictest167350irq/118-8000000.ethernet-tx023:30:240
2580209994538,4cyclictest167350irq/118-8000000.ethernet-tx000:20:180
258020999452,40cyclictest0-21swapper/020:50:230
2580209994510,16cyclictest15-21rcuc/019:45:010
2580209994510,16cyclictest15-21rcuc/019:45:010
258021399447,20cyclictest30-21rcuc/222:30:012
2580213994435,5cyclictest0-21swapper/220:05:012
2580213994427,13cyclictest311ktimers/223:50:102
258021399441,38cyclictest0-21swapper/222:20:002
258021399441,24cyclictest0-21swapper/221:55:012
2580212994436,4cyclictest167450irq/126-8000000.ethernet-tx120:00:001
2580212994436,4cyclictest167450irq/126-8000000.ethernet-tx120:00:001
2580212994428,12cyclictest0-21swapper/120:35:301
2580212994426,11cyclictest0-21swapper/121:55:011
2580212994416,9cyclictest2605363-21apt-key21:35:011
2580213994328,7cyclictest311ktimers/200:00:132
258021399431,27cyclictest0-21swapper/219:50:012
258021399431,27cyclictest0-21swapper/219:50:002
258021399431,23cyclictest0-21swapper/219:10:002
258020999434,5cyclictest2600040-21grep21:00:280
258020999433,5cyclictest0-21swapper/000:00:220
2580209994335,5cyclictest0-21swapper/023:50:130
2580209994335,4cyclictest2599015-21grep20:55:270
2580209994328,10cyclictest131ktimers/022:00:160
258020999432,5cyclictest2588407-21df_inode19:55:170
258020999432,5cyclictest2588407-21df_inode19:55:160
258020999431,9cyclictest0-21swapper/022:19:590
258020999431,4cyclictest2595884-21users20:35:310
258020999431,4cyclictest15-21rcuc/021:45:200
2580213994231,6cyclictest2592489-21grep20:15:272
258021399421,33cyclictest0-21swapper/220:30:012
258021399421,23cyclictest0-21swapper/221:25:012
2580212994233,5cyclictest2607044-21grep21:40:281
258020999424,36cyclictest0-21swapper/022:40:220
2580209994235,4cyclictest0-21swapper/019:35:250
2580209994234,5cyclictest0-21swapper/020:45:240
2580209994234,5cyclictest0-21swapper/020:45:240
258020999421,4cyclictest0-21swapper/020:30:010
258020999421,39cyclictest0-21swapper/000:10:200
2580209994131,7cyclictest0-21swapper/021:35:230
258020999413,10cyclictest15-21rcuc/019:20:010
258020999412,4cyclictest2610522-21irqstats22:10:220
2580209994124,15cyclictest0-21swapper/022:50:230
258020999412,3cyclictest2600650-21/usr/sbin/munin21:05:270
258020999412,35cyclictest2623152-21ls00:10:000
2580209994121,14cyclictest131ktimers/023:00:150
2580213994030,7cyclictest311ktimers/223:20:112
2580213994030,4cyclictest0-21swapper/220:40:022
258021399401,7cyclictest0-21swapper/222:40:012
258021399401,2cyclictest0-21swapper/219:40:022
258021299404,2cyclictest0-21swapper/123:20:011
2580212994032,5cyclictest2614017-21grep22:40:281
2580212994028,8cyclictest2621957-21sh00:00:001
2580212994027,9cyclictest0-21swapper/120:40:301
258020999401,37cyclictest0-21swapper/021:24:320
258020999401,35cyclictest2608605-21sendmail_mailtr21:50:280
2580213993931,5cyclictest0-21swapper/221:10:292
258021399391,5cyclictest0-21swapper/223:35:012
2580212993932,5cyclictest2611992-21munin-plugin-st22:25:001
2580212993929,6cyclictest2594116-21grep20:25:281
2580212993929,5cyclictest0-21swapper/119:20:271
2580212993928,6cyclictest0-21swapper/122:10:281
2580212993928,5cyclictest0-21swapper/123:40:191
2580212993925,8cyclictest0-21swapper/121:25:221
2580212993923,10cyclictest0-21swapper/122:00:271
258020999393,34cyclictest0-21swapper/020:10:140
2580209993932,4cyclictest0-21swapper/021:30:210
258020999392,34cyclictest2621963-21sendmail00:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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