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2026-09-05 - 12:01

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 50 highest latencies:
System rack4slot1s.osadl.org (updated Sat Sep 05, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2558521250,3sleep20-21swapper/200:14:202
148321060,4sleep11481-21systemctl21:44:081
148321060,4sleep11481-21systemctl21:44:081
2305821040,2sleep00-21swapper/000:04:330
473621030,3sleep0201rcuc/021:49:300
473621030,3sleep0201rcuc/021:49:300
173492990,2sleep20-21swapper/222:24:252
70692820,2sleep20-21swapper/221:58:402
70692820,2sleep20-21swapper/221:58:402
39902820,3sleep20-21swapper/220:24:092
39902820,3sleep20-21swapper/220:24:092
236472820,2sleep20-21swapper/219:49:202
236472820,2sleep20-21swapper/219:49:202
132152790,3sleep20-21swapper/222:14:202
59662750,3chrt0-21swapper/320:29:133
59662750,3chrt0-21swapper/320:29:133
67002740,4sleep30-21swapper/320:29:253
67002740,4sleep30-21swapper/320:29:253
297952660,3chrt0-21swapper/322:59:163
297952660,3chrt0-21swapper/322:59:163
254462620,2chrt0-21swapper/122:44:301
232762530,2sleep123419-21wc22:39:291
232762530,2sleep123419-21wc22:39:291
232762530,2sleep123419-21wc22:39:291
191332500,2sleep10-21swapper/122:29:231
191332500,2sleep10-21swapper/122:29:231
53232470,1sleep3431rcuc/321:54:113
53232470,1sleep3431rcuc/321:54:113
177122470,2chrt17711-21if_err_eth020:59:221
46542460,3sleep20-21swapper/223:19:082
46542460,3sleep20-21swapper/223:19:082
11051994539,3cyclictest0-21swapper/100:04:151
11051994539,3cyclictest0-21swapper/100:04:151
215392440,3sleep20-21swapper/219:44:132
215392440,3sleep20-21swapper/219:44:132
273452410,3sleep30-21swapper/321:24:243
273452410,3sleep30-21swapper/321:24:243
188982410,3sleep30-21swapper/322:29:213
188982410,3sleep30-21swapper/322:29:213
85042390,2sleep08610-21vmstat21:59:320
85042390,2sleep08610-21vmstat21:59:320
277542390,3sleep20-21swapper/222:54:082
277542390,3sleep20-21swapper/222:54:082
260732390,2sleep126108-21ntp_states19:54:261
245042390,3sleep30-21swapper/322:44:203
11051993931,6cyclictest16407-21fschecks_time23:49:211
228622380,3sleep30-21swapper/322:39:223
228622380,3sleep30-21swapper/322:39:223
228622380,3sleep30-21swapper/322:39:223
11050993813,5cyclictest201rcuc/022:39:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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