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2026-08-12 - 15:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 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 rack4slot1s.osadl.org (updated Wed Aug 12, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203621290,3sleep30-21swapper/309:09:023
203621290,3sleep30-21swapper/309:09:023
595121090,2chrt5950-21ntp_states09:19:051
595121090,2chrt5950-21ntp_states09:19:051
595121090,2chrt5950-21ntp_states09:19:051
2022721040,2sleep0201rcuc/011:24:020
2022721040,2sleep0201rcuc/011:24:020
305322930,3sleep30-21swapper/310:24:113
305322930,3sleep30-21swapper/310:24:113
122532890,2sleep00-21swapper/011:04:000
34092810,3sleep00-21swapper/010:39:040
34092810,3sleep00-21swapper/010:39:040
59552680,3sleep20-21swapper/207:54:002
59552680,3sleep20-21swapper/207:54:002
24982680,2sleep00-21swapper/012:04:020
24982680,2sleep00-21swapper/012:04:020
279452660,3sleep30-21swapper/311:44:073
279452660,3sleep30-21swapper/311:44:073
146232650,2chrt14032-21/usr/sbin/munin11:09:020
146232650,2chrt14032-21/usr/sbin/munin11:09:020
270852640,4sleep20-21swapper/210:14:092
270852640,4sleep20-21swapper/210:14:092
88952550,2chrt8894-21grep07:59:080
88952550,2chrt8894-21grep07:59:080
313802540,2sleep131443-21ntpq07:34:061
204562510,2sleep020457-21cut09:59:000
204562510,2sleep020457-21cut09:59:000
204562510,2sleep020457-21cut09:59:000
117232510,3sleep011727-21gltestperf08:09:010
289232500,3sleep00-21swapper/008:54:030
104632500,3sleep30-21swapper/308:04:103
110192430,2sleep111118-21grep10:59:081
110192430,2sleep111118-21grep10:59:081
110192430,2sleep111118-21grep10:59:081
162232420,3sleep00-21swapper/008:19:100
162232420,3sleep00-21swapper/008:19:100
23172390,4sleep30-21swapper/307:44:003
23607993830,2cyclictest181rcu_preempt09:23:410
23607993830,2cyclictest181rcu_preempt09:23:410
23607993830,2cyclictest181rcu_preempt09:23:410
194552380,3sleep00-21swapper/008:29:030
16822370,3chrt1683-21tune2fs09:08:590
16822370,3chrt1683-21tune2fs09:08:590
23607993528,5cyclictest3043-21threads07:44:080
23607993528,5cyclictest16225-21gltestperf11:14:000
23607993526,7cyclictest5272-21unixbench-2d12:09:140
23607993526,7cyclictest5272-21unixbench-2d12:09:140
23607993516,6cyclictest90-1pr/ttyS011:56:180
21142350,2sleep12174-21ntp_kernel_pll_09:09:051
21142350,2sleep12174-21ntp_kernel_pll_09:09:051
23612993426,6cyclictest6674-21netstat12:14:061
166462340,1sleep1251irq_work/111:14:071
85112330,3sleep30-21swapper/312:19:053
85112330,3sleep30-21swapper/312:19:053
23612993326,5cyclictest11189-21cron08:08:461
23607993325,6cyclictest16596-21unixbench_singl12:39:100
23607993325,6cyclictest16596-21unixbench_singl12:39:100
23607993325,6cyclictest16596-21unixbench_singl12:39:100
23607993225,5cyclictest7300-21fschecks_time09:24:000
171772310,3sleep00-21swapper/008:24:010
171772310,3sleep00-21swapper/008:24:010
23612993024,3cyclictest2583-21latency07:44:021
23612993023,5cyclictest23144-21kernelversion08:39:021
23612993023,5cyclictest23144-21kernelversion08:39:021
23607993023,5cyclictest22257-21sshd08:36:390
23607993023,5cyclictest22257-21sshd08:36:390
154512300,2sleep20-21swapper/209:44:062
154512300,2sleep20-21swapper/209:44:062
103402300,3sleep20-21swapper/208:04:092
23612992921,6cyclictest27351-21fschecks_count11:44:001
23612992921,6cyclictest27351-21fschecks_count11:44:001
23607992921,6cyclictest16714-21cut09:49:000
23607992919,8cyclictest31828-21latency_hist09:03:480
23607992919,8cyclictest31828-21latency_hist09:03:480
295052280,2chrt0-21swapper/210:23:542
295052280,2chrt0-21swapper/210:23:542
295052280,2chrt0-21swapper/210:23:542
23612992822,4cyclictest23602-21cyclictest10:14:081
23612992822,4cyclictest23602-21cyclictest10:14:081
23612992822,4cyclictest0-21swapper/108:28:491
23612992822,4cyclictest0-21swapper/108:28:491
23612992821,5cyclictest12915-21sshd12:29:321
23612992820,6cyclictest8514-21fschecks_count10:54:001
23612992820,6cyclictest8514-21fschecks_count10:54:001
23612992820,6cyclictest4943-21timerandwakeup07:49:101
23607992822,4cyclictest749-21runrttasks08:44:110
23607992822,4cyclictest735-21systemd-logind10:04:090
23607992820,6cyclictest9992-21cut12:24:010
23607992820,6cyclictest12988-21cut09:39:000
23607992820,6cyclictest12988-21cut09:39:000
23607992818,7cyclictest29720-21fschecks_count10:24:010
23607992818,7cyclictest29720-21fschecks_count10:24:010
25532270,1sleep02573-21latency_hist10:38:480
25532270,1sleep02573-21latency_hist10:38:480
23612992723,3cyclictest24606-21cpuspeed08:43:591
23612992721,4cyclictest29341-21gltestperf11:49:011
23612992721,4cyclictest29341-21gltestperf11:49:011
23612992720,5cyclictest14097-21missed_timers12:34:041
2361299271,6cyclictest57632ls12:13:471
2361299271,6cyclictest57632ls12:13:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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