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2026-01-02 - 19:57

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 Jan 02, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
340232499802,7cyclictest3410072-21sed07:50:320
340232499802,7cyclictest3410072-21sed07:50:320
3402324997729,12cyclictest131ktimers/011:15:140
3402326997512,28cyclictest3421452-21/usr/sbin/munin09:00:181
3402324997334,35cyclictest0-21swapper/010:20:000
3402324997313,8cyclictest131ktimers/011:25:260
3402324997221,47cyclictest20850irq/208-8000000.ethernet10:00:140
340232499705,14cyclictest3431372-21apt-get10:00:010
340232499702,5cyclictest3419141-21if_eth008:45:220
340232499691,54cyclictest0-21swapper/011:50:120
3402324996824,19cyclictest0-21swapper/007:30:310
3402324996732,6cyclictest0-21swapper/010:40:300
3402324996439,21cyclictest20850irq/208-8000000.ethernet08:40:000
3402324996028,6cyclictest0-21swapper/009:20:280
3402324995923,33cyclictest0-21swapper/007:20:010
3402324995830,7cyclictest3453411-21grep12:05:270
3402329995711,21cyclictest30-21rcuc/208:45:012
3402326995737,12cyclictest0-21swapper/112:35:101
3402326995635,12cyclictest3425678-21apt-get09:25:181
3402326995635,12cyclictest3425678-21apt-get09:25:181
3402326995543,8cyclictest3422293-21munin-node09:05:091
3402326995540,11cyclictest3405317-21munin-node07:25:111
3402326995537,13cyclictest3428215-21apt-get09:40:151
3402326995537,13cyclictest3428215-21apt-get09:40:151
3402326995439,10cyclictest0-21swapper/110:00:001
3402326995434,14cyclictest0-21swapper/107:55:121
3402326995434,14cyclictest0-21swapper/107:55:121
3402326995434,12cyclictest3435061-21apt-get10:20:161
3402329995315,14cyclictest0-21swapper/208:20:012
340232699531,27cyclictest0-21swapper/111:50:011
340232499534,23cyclictest15-21rcuc/011:05:010
3402329995240,9cyclictest1283-21cron11:35:002
3402329995238,9cyclictest1283-21cron10:15:012
340232499524,9cyclictest3452757-21gpg-connect-age12:05:010
3402324995243,4cyclictest167350irq/118-8000000.ethernet-tx007:55:220
3402324995243,4cyclictest167350irq/118-8000000.ethernet-tx007:55:220
3402326995132,14cyclictest0-21swapper/109:30:151
340232499514,21cyclictest15-21rcuc/009:10:010
3402326995035,9cyclictest0-21swapper/111:35:161
3402326995034,11cyclictest3440956-21apt-get10:55:141
3402326995031,13cyclictest0-21swapper/111:15:151
3402326995029,13cyclictest3410181-21gpgv07:55:011
3402326995029,13cyclictest3410181-21gpgv07:55:001
3402326995027,14cyclictest0-21swapper/112:20:291
3402326995027,13cyclictest0-21swapper/110:10:111
3402329994929,13cyclictest0-21swapper/212:25:282
3402326994931,12cyclictest3415146-21/usr/sbin/munin08:20:301
3402326994930,13cyclictest0-21swapper/109:15:121
3402326994928,11cyclictest3420053-21/usr/sbin/munin08:50:261
3402326994925,14cyclictest3416729-21/usr/sbin/munin08:30:251
3402326994924,14cyclictest3432525-21/usr/sbin/munin10:05:151
3402324994943,3cyclictest3454359-21munin-plugin-st12:14:590
3402324994943,3cyclictest0-21swapper/010:55:110
340232699487,18cyclictest0-21swapper/111:40:021
3402326994826,14cyclictest3437929-21/usr/sbin/munin10:35:261
3402326994824,14cyclictest3407258-21/usr/sbin/munin07:35:261
3402326994734,9cyclictest3454331-21users12:10:301
3402326994732,8cyclictest3443490-21apt-get11:10:161
3402326994725,11cyclictest0-21swapper/110:40:141
3402324994741,4cyclictest20850irq/208-8000000.ethernet12:35:200
340232499471,40cyclictest0-21swapper/010:30:010
3402329994629,11cyclictest0-21swapper/208:25:292
3402326994639,3cyclictest3451953-21apt-get12:00:141
3402326994633,9cyclictest3446874-21apt-get11:30:121
3402326994633,9cyclictest3404632-21ssh07:20:201
3402326994629,11cyclictest0-21swapper/108:15:171
3402326994629,11cyclictest0-21swapper/107:30:141
3402326994628,12cyclictest3434449-21/usr/sbin/munin10:15:251
3402326994626,12cyclictest3450456-21/usr/sbin/munin11:50:211
3402326994626,12cyclictest3415742-21/usr/sbin/munin08:25:211
3402326994622,16cyclictest3443095-21/usr/sbin/munin11:05:271
3402324994638,5cyclictest3433143-21kworker/u8:1+events_power_efficient11:40:120
3402329994533,8cyclictest3439853-21grep10:45:292
3402326994537,4cyclictest3418916-21apt-get08:45:151
3402326994531,9cyclictest3404243-21sshd07:19:041
3402326994531,9cyclictest0-21swapper/108:00:141
3402326994530,8cyclictest3451271-21/usr/sbin/munin11:55:221
3402326994529,8cyclictest3430107-21/usr/sbin/munin09:50:221
3402326994526,13cyclictest3436345-21/usr/sbin/munin10:25:261
3402326994526,13cyclictest3424941-21/usr/sbin/munin09:20:181
3402326994523,13cyclictest3423203-21/usr/sbin/munin09:10:191
3402326994523,13cyclictest3423203-21/usr/sbin/munin09:10:191
3402326994522,17cyclictest3456853-21sed12:25:291
340232499453,35cyclictest131ktimers/009:05:010
340232499451,4cyclictest0-21swapper/011:50:020
3402329994437,4cyclictest3428855-21munin-plugin-st09:45:002
3402329994437,4cyclictest3428855-21munin-plugin-st09:45:002
3402326994436,6cyclictest0-21swapper/112:30:021
3402326994436,6cyclictest0-21swapper/112:30:021
3402326994434,6cyclictest3452883-21apt-get12:05:101
3402326994430,9cyclictest3418558-21/usr/sbin/munin08:40:281
3402326994430,9cyclictest3418558-21/usr/sbin/munin08:40:281
3402326994427,12cyclictest0-21swapper/108:35:091
3402326994425,14cyclictest3445366-21/usr/sbin/munin11:20:221
3402326994423,13cyclictest3420994-21/usr/sbin/munin08:55:281
3402326994423,13cyclictest3420994-21/usr/sbin/munin08:55:281
340232699442,19cyclictest0-21swapper/110:55:001
3402324994434,7cyclictest3448249-21grep11:35:300
3402324994429,9cyclictest0-21swapper/008:20:310
340232499441,7cyclictest3407141-21sh07:35:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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