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2026-03-20 - 18:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot5s.osadl.org (updated Fri Mar 20, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2523258995144,5cyclictest2582359-21kworker/u8:2+events_unbound10:09:492
2523258995131,9cyclictest131rcu_preempt08:40:152
2523251995040,7cyclictest2637794-21grep12:35:250
2523252994938,7cyclictest2566440-21grep09:10:251
2523252994934,11cyclictest231ktimers/112:10:121
2523265994821,22cyclictest0-21swapper/309:04:343
2523265994821,22cyclictest0-21swapper/309:04:343
2523258994840,5cyclictest2606566-21kworker/u8:3+events_unbound12:05:112
2523258994839,7cyclictest2558549-21kworker/u8:2+events_unbound09:44:412
2523258994836,8cyclictest2554702-21apt08:40:012
2523265994633,8cyclictest2554284-21grep08:35:253
252326599462,11cyclictest2622283-21unixbench_singl11:50:263
2523252994635,7cyclictest2601384-21cron10:55:001
2523265994519,23cyclictest391ktimers/308:05:113
2523258994537,4cyclictest2566871-21munin-plugin-st09:14:592
2523265994418,22cyclictest0-21swapper/310:20:003
2523252994435,5cyclictest2527233-21sendmail07:20:011
252326599433,6cyclictest2607273-21df11:10:133
2523265994322,16cyclictest0-21swapper/307:30:153
252326599430,11cyclictest2631682-21apt-get12:20:123
252326599430,11cyclictest2631682-21apt-get12:20:123
252326599424,32cyclictest2629042-21grep12:10:243
252326599422,5cyclictest2593977-21/usr/sbin/munin10:30:233
252326599422,14cyclictest2528910-21cron07:25:003
252326599421,9cyclictest2609389-21/usr/sbin/munin11:15:183
252326599421,9cyclictest2572016-21cron09:28:013
252326599421,8cyclictest2568083-21tail09:15:233
2523252994231,6cyclictest0-21swapper/112:05:101
252326599411,9cyclictest2549722-21/usr/sbin/munin08:25:133
252326599411,9cyclictest2549722-21/usr/sbin/munin08:25:133
252326599411,9cyclictest2533926-21cron07:39:003
252326599411,8cyclictest2636440-21sshd12:33:453
252326599411,8cyclictest2616562-21meminfo11:35:193
252326599411,7cyclictest2583689-21/usr/sbin/munin10:00:263
252326599411,7cyclictest2570395-21cron09:24:013
252326599411,5cyclictest2629517-21apt-get12:15:063
252326599411,11cyclictest2603665-21df11:00:123
252326599411,11cyclictest2603665-21df11:00:123
252326599411,11cyclictest2580266-21unixbench_multi09:50:243
252326599411,10cyclictest2625229-21ntp_states12:00:223
2523258994133,6cyclictest2624425-21sendmail12:00:002
2523252994128,8cyclictest0-21swapper/108:40:011
2523252994127,8cyclictest2547266-21grep08:15:261
2523251994132,6cyclictest0-21swapper/010:15:150
252326599403,6cyclictest2542171-21users08:00:263
2523265994030,5cyclictest0-21swapper/311:00:003
2523265994030,5cyclictest0-21swapper/311:00:003
252326599401,9cyclictest2525731-21apt-get07:15:123
252326599401,8cyclictest2581180-21/usr/sbin/munin09:55:163
252326599401,5cyclictest2596639-21df_inode10:40:133
2523265994011,25cyclictest0-21swapper/309:40:233
252326599401,11cyclictest2556010-21grep08:40:233
2523265994010,26cyclictest0-21swapper/308:20:193
252326599400,9cyclictest2620804-21sshd11:47:453
2523258994033,4cyclictest2601387-21cron10:55:002
2523252994034,4cyclictest2532552-21kworker/u8:2+events_unbound07:59:251
2523251994027,10cyclictest121ktimers/010:55:110
2523251994027,10cyclictest121ktimers/010:55:110
252326599398,28cyclictest2586752-21/usr/sbin/munin10:10:233
252326599391,8cyclictest2627330-21/usr/sbin/munin12:05:213
252326599391,8cyclictest2585555-21sshd10:06:453
252326599391,8cyclictest2529284-21forks07:25:153
252326599391,7cyclictest2523509-21/usr/sbin/munin07:10:133
252326599391,6cyclictest2559852-21cron08:53:003
252326599391,4cyclictest2595325-21/usr/sbin/munin10:35:203
2523265993914,21cyclictest0-21swapper/307:50:163
252326599391,11cyclictest2566468-21users09:10:263
252326599391,11cyclictest2557312-21memory08:45:183
252326599391,10cyclictest2535975-21/usr/sbin/munin07:45:153
252326599391,10cyclictest2535975-21/usr/sbin/munin07:45:153
2523258993923,6cyclictest2550636-21grep08:25:252
2523258993923,6cyclictest2550636-21grep08:25:252
2523252993929,6cyclictest2560404-21cut08:55:161
2523252993929,6cyclictest2560404-21cut08:55:161
252326599389,26cyclictest2560649-21sort08:55:183
252326599389,26cyclictest2560649-21sort08:55:183
252326599383,30cyclictest2540850-21munin-run08:00:003
2523265993826,7cyclictest0-21swapper/311:55:263
252326599382,5cyclictest2606573-21sshd11:05:463
252326599382,3cyclictest2534432-21/usr/sbin/munin07:40:163
252326599381,9cyclictest2545554-21grep08:10:253
252326599381,6cyclictest2590189-21/usr/sbin/munin10:20:223
252326599381,5cyclictest2574235-21df09:35:143
252326599381,4cyclictest2551982-21meminfo08:30:193
252326599381,3cyclictest2612505-21/usr/sbin/munin11:25:183
252326599381,11cyclictest2598893-21/usr/sbin/munin10:45:223
252326599381,11cyclictest2563891-21grep09:05:173
252325299386,4cyclictest131rcu_preempt11:15:131
2523251993829,4cyclictest2633163-21munin-plugin-st12:25:000
2523251993829,4cyclictest2633163-21munin-plugin-st12:25:000
2523251993824,9cyclictest2623951-21grep11:55:250
252326599372,4cyclictest2591403-21/usr/sbin/munin10:25:183
252326599371,9cyclictest2618910-21users11:40:243
252326599371,9cyclictest2611117-21if_eth111:20:173
252326599371,8cyclictest2546197-21/usr/sbin/munin08:15:173
252326599371,7cyclictest2577774-21fschecks_time09:45:153
252326599371,4cyclictest2633935-21ntpq12:25:203
252326599371,4cyclictest2614202-21/usr/sbin/munin11:30:243
2523258993730,4cyclictest2596277-21cron10:40:002
2523258993729,4cyclictest0-21swapper/209:30:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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