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2026-07-13 - 06:55

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 Mon Jul 13, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2849921040,3sleep031229-21cyclictest21:58:340
2849921040,3sleep031229-21cyclictest21:58:340
2822421030,2sleep028228-21missed_timers23:23:360
2822421030,2sleep028228-21missed_timers23:23:360
758921000,3sleep30-21swapper/323:53:423
758921000,3sleep30-21swapper/323:53:423
758921000,3sleep30-21swapper/323:53:423
50082950,3sleep30-21swapper/323:48:363
50082950,3sleep30-21swapper/323:48:363
207732900,3sleep20-21swapper/200:28:432
207732900,3sleep20-21swapper/200:28:432
207732900,3sleep20-21swapper/200:28:432
76722880,3chrt0-21swapper/321:03:293
76722880,3chrt0-21swapper/321:03:293
76722880,3chrt0-21swapper/321:03:293
239672870,3sleep20-21swapper/220:18:422
239672870,3sleep20-21swapper/220:18:422
163952870,4sleep20-21swapper/222:53:312
163952870,4sleep20-21swapper/222:53:312
163952870,4sleep20-21swapper/222:53:312
274372860,2sleep20-21swapper/220:28:352
163752860,2sleep30-21swapper/319:58:413
163752860,2sleep30-21swapper/319:58:413
273482840,3chrt0-21swapper/323:23:193
273482840,3chrt0-21swapper/323:23:193
273482840,3chrt0-21swapper/323:23:193
201422840,3chrt0-21swapper/300:28:363
201422840,3chrt0-21swapper/300:28:363
201422840,3chrt0-21swapper/300:28:363
176402830,2sleep017643-21grep21:28:390
176402830,2sleep017643-21grep21:28:390
304062810,3sleep2351rcuc/220:38:242
304062810,3sleep2351rcuc/220:38:242
323382790,3sleep3431rcuc/322:08:343
323382790,3sleep3431rcuc/322:08:343
323382790,3sleep3431rcuc/322:08:343
154352780,3chrt0-21swapper/019:58:220
154352780,3chrt0-21swapper/019:58:220
154352780,3chrt0-21swapper/019:58:220
229882760,1sleep122989-21cut20:18:251
229882760,1sleep122989-21cut20:18:251
92792740,3chrt0-21swapper/219:38:422
92792740,3chrt0-21swapper/219:38:422
325212680,2sleep20-21swapper/223:33:432
325212680,2sleep20-21swapper/223:33:432
142532670,1sleep10-21swapper/100:13:351
142532670,1sleep10-21swapper/100:13:351
273092660,2sleep127436-21wc20:28:351
90662550,3sleep20-21swapper/223:58:402
90662550,3sleep20-21swapper/223:58:402
90662550,3sleep20-21swapper/223:58:402
31230994925,19cyclictest10083-21sed00:03:270
31230994925,19cyclictest10083-21sed00:03:270
31230994925,19cyclictest10083-21sed00:03:270
190062490,3sleep30-21swapper/320:07:013
190062490,3sleep30-21swapper/320:07:013
190062490,3sleep30-21swapper/320:07:013
83952470,3sleep30-21swapper/321:03:383
83952470,3sleep30-21swapper/321:03:383
201742470,2sleep20-21swapper/223:03:322
201742470,2sleep20-21swapper/223:03:322
150382470,3sleep00-21swapper/022:48:350
150382470,3sleep00-21swapper/022:48:350
150382470,3sleep00-21swapper/022:48:350
277042460,4sleep30-21swapper/320:28:403
129072460,3sleep012879-21timerandwakeup19:48:410
129072460,3sleep012879-21timerandwakeup19:48:410
129072460,3sleep012879-21timerandwakeup19:48:410
3123099422,34cyclictest10651-21/usr/sbin/munin00:03:350
3123099422,34cyclictest10651-21/usr/sbin/munin00:03:350
31230994032,6cyclictest1-21systemd20:23:190
31230994032,6cyclictest1-21systemd20:23:190
3123399393,26cyclictest10085-21chrt00:03:273
3123399393,26cyclictest10085-21chrt00:03:273
3123399393,26cyclictest10085-21chrt00:03:273
31231993930,7cyclictest25322-21fschecks_count00:43:321
31231993930,7cyclictest25322-21fschecks_count00:43:321
3123199392,27cyclictest10932-21ntp_states00:03:421
3123199392,27cyclictest10932-21ntp_states00:03:421
31230993931,6cyclictest1239-21/usr/sbin/munin22:13:320
31230993931,6cyclictest1239-21/usr/sbin/munin22:13:320
31230993931,6cyclictest1239-21/usr/sbin/munin22:13:320
210632390,4sleep20-21swapper/221:38:342
210632390,4sleep20-21swapper/221:38:342
74232380,1sleep00-21swapper/022:28:330
74232380,1sleep00-21swapper/022:28:330
31231993831,5cyclictest4098-21latency_hist19:28:191
31231993831,5cyclictest4098-21latency_hist19:28:191
31231993831,5cyclictest4098-21latency_hist19:28:191
31230993832,4cyclictest201rcuc/020:34:400
31230993832,4cyclictest201rcuc/020:34:400
31230993731,4cyclictest14725-21latency_hist22:48:320
224242370,3sleep30-21swapper/320:13:443
224242370,3sleep30-21swapper/320:13:443
126712370,3sleep30-21swapper/322:43:313
95522360,6sleep30-21swapper/322:33:383
95522360,6sleep30-21swapper/322:33:383
95522360,6sleep30-21swapper/322:33:383
31230993629,5cyclictest10155-21fschecks_count19:43:320
31230993629,5cyclictest10155-21fschecks_count19:43:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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