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2026-09-06 - 12:50

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 Sun Sep 06, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2094221020,4sleep20-21swapper/200:09:332
147482980,3sleep06680-21cyclictest23:54:270
34082930,3sleep20-21swapper/223:24:262
260662920,1sleep0221irq_work/021:32:120
260662920,1sleep0221irq_work/021:32:120
108382770,2sleep00-21swapper/022:19:160
316492710,2sleep20-21swapper/200:39:322
316492710,2sleep20-21swapper/200:39:322
316492710,2sleep20-21swapper/200:39:322
63892600,3chrt0-21swapper/223:34:112
6697995751,4cyclictest0-21swapper/000:04:290
9372560,2sleep20-21swapper/220:24:292
9372560,2sleep20-21swapper/220:24:292
24752560,3chrt0-21swapper/020:29:250
175582550,3sleep20-21swapper/219:44:122
175582550,3sleep20-21swapper/219:44:122
106902510,3chrt0-21swapper/023:44:220
106902510,3chrt0-21swapper/023:44:220
315992500,2sleep30-21swapper/320:19:313
315992500,2sleep30-21swapper/320:19:313
265672500,1sleep00-21swapper/021:34:250
262952500,3chrt0-21swapper/022:59:240
262952500,3chrt0-21swapper/022:59:240
6697994944,2cyclictest0-21swapper/000:04:130
6697994944,2cyclictest0-21swapper/000:04:130
6697994944,2cyclictest0-21swapper/000:04:130
296382480,3sleep00-21swapper/020:14:290
84102450,3sleep3431rcuc/320:44:273
84102450,3sleep3431rcuc/320:44:273
173742450,3sleep00-21swapper/021:09:250
233822400,3sleep30-21swapper/321:24:273
233822400,3sleep30-21swapper/321:24:273
208352390,1sleep1181rcu_preempt22:44:251
208352390,1sleep1181rcu_preempt22:44:251
12812390,4sleep20-21swapper/221:54:092
12812390,4sleep20-21swapper/221:54:092
670499365,26cyclictest18492-21bingrep00:04:271
6704993631,3cyclictest32528-21cron00:44:101
6704993631,3cyclictest32528-21cron00:44:101
6704993631,3cyclictest32528-21cron00:44:101
6704993527,6cyclictest572-21cups-browsed20:24:091
6704993527,6cyclictest572-21cups-browsed20:24:091
6697993429,4cyclictest31026-21tail20:19:230
6697993429,4cyclictest31026-21tail20:19:230
671299332,24cyclictest17728-21chrt00:04:142
671299332,24cyclictest17728-21chrt00:04:142
671299332,24cyclictest17728-21chrt00:04:142
6704993324,7cyclictest32347-21gltestperf21:49:221
6704993324,7cyclictest32347-21gltestperf21:49:221
6697993327,4cyclictest6680-21cyclictest00:15:150
6704993218,11cyclictest9186-21ntp_states23:39:281
6704993218,11cyclictest9186-21ntp_states23:39:281
38192320,3sleep30-21swapper/321:59:253
38192320,3sleep30-21swapper/321:59:253
6704993122,7cyclictest15965-21fschecks_count19:39:221
6704993122,7cyclictest15965-21fschecks_count19:39:221
670499312,23cyclictest17823-21date00:04:201
670499312,23cyclictest17823-21date00:04:201
6697993124,5cyclictest5684-21sshd20:39:130
6697993124,5cyclictest5684-21sshd20:39:130
6697993124,5cyclictest1974-21sshd20:29:130
6697993124,5cyclictest1974-21sshd20:29:130
155212310,1sleep115614-21/usr/sbin/munin22:29:311
6704993021,7cyclictest3049-21fschecks_time23:24:231
669799306,6cyclictest171ktimers/022:03:110
669799306,6cyclictest171ktimers/022:03:110
6697993024,4cyclictest4893-21fschecks_time23:29:220
6697993024,4cyclictest12253-21proc_pri20:54:320
6697993024,4cyclictest12253-21proc_pri20:54:320
6697993021,7cyclictest3502-21netstat23:24:280
225512300,4chrt0-21swapper/222:49:252
6704992925,2cyclictest0-21swapper/121:29:091
6704992925,2cyclictest0-21swapper/121:29:091
6704992923,5cyclictest9835-21processes22:14:311
6704992923,4cyclictest18749-21cut22:39:251
6704992923,4cyclictest18749-21cut22:39:251
6704992922,5cyclictest1988-21timerwakeupswit23:19:321
6704992922,5cyclictest1988-21timerwakeupswit23:19:321
6704992922,5cyclictest1988-21timerwakeupswit23:19:321
6697992923,4cyclictest32145-21unixbench_singl00:39:360
6697992923,4cyclictest32145-21unixbench_singl00:39:360
6697992923,4cyclictest32145-21unixbench_singl00:39:360
6697992921,6cyclictest20028-21cut00:09:230
6697992919,8cyclictest22628-21kernelversion22:49:260
672399282,17cyclictest17738-21chrt00:04:153
672399282,17cyclictest17738-21chrt00:04:153
672399282,17cyclictest17738-21chrt00:04:153
6704992821,5cyclictest6680-21cyclictest23:14:221
6704992821,5cyclictest6680-21cyclictest23:14:221
6704992820,6cyclictest20555-21threads19:49:331
669799288,17cyclictest201rcuc/021:06:400
6697992823,4cyclictest14678-21systemd-journal20:43:130
6697992823,4cyclictest14678-21systemd-journal20:43:130
6697992822,4cyclictest6680-21cyclictest00:29:240
6697992822,4cyclictest6680-21cyclictest00:29:240
6697992820,6cyclictest16071-21cut19:39:230
6697992820,6cyclictest16071-21cut19:39:230
6697992819,7cyclictest1066-21fschecks_count23:19:220
6697992819,7cyclictest1066-21fschecks_count23:19:220
6697992819,7cyclictest1066-21fschecks_count23:19:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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