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2026-06-19 - 21:04

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 Fri Jun 19, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1257921260,3sleep20-21swapper/212:03:002
1257921260,3sleep20-21swapper/212:03:002
2110021140,3sleep20-21swapper/210:58:112
2110021140,3sleep20-21swapper/210:58:112
996421040,1sleep20-21swapper/209:02:582
149772940,2sleep20-21swapper/207:48:132
149772940,2sleep20-21swapper/207:48:132
149772940,2sleep20-21swapper/207:48:132
9102930,3chrt0-21swapper/210:03:162
9102930,3chrt0-21swapper/210:03:162
210172840,3sleep20-21swapper/212:23:192
210172840,3sleep20-21swapper/212:23:192
57962800,3chrt0-21swapper/310:18:083
57962800,3chrt0-21swapper/310:18:083
172882790,3sleep30-21swapper/312:13:183
172882790,3sleep30-21swapper/312:13:183
70412730,4sleep20-21swapper/207:28:072
70412730,4sleep20-21swapper/207:28:072
299442700,2sleep20-21swapper/208:28:132
299442700,2sleep20-21swapper/208:28:132
299442700,2sleep20-21swapper/208:28:132
209402630,3sleep020914-21needreboot12:23:160
209402630,3sleep020914-21needreboot12:23:160
91372620,3sleep01387-21cyclictest08:58:180
35102620,4sleep20-21swapper/208:43:202
35102620,4sleep20-21swapper/208:43:202
101912620,3chrt0-21swapper/310:28:133
101912620,3chrt0-21swapper/310:28:133
101912620,3chrt0-21swapper/310:28:133
315142590,7sleep0171ktimers/008:33:130
315142590,7sleep0171ktimers/008:33:130
103972580,2chrt10367-21fschecks_time09:03:120
103972580,2chrt10367-21fschecks_time09:03:120
182492570,2chrt0-21swapper/310:48:193
182492570,2chrt0-21swapper/310:48:193
182492570,2chrt0-21swapper/310:48:193
131952550,2chrt13194-21sed10:38:030
131952550,2chrt13194-21sed10:38:030
87622540,4sleep20-21swapper/207:33:052
87622540,4sleep20-21swapper/207:33:052
34522520,1sleep03454-21fschecks_count11:38:090
34522520,1sleep03454-21fschecks_count11:38:090
183572500,3sleep20-21swapper/209:23:162
183572500,3sleep20-21swapper/209:23:162
16632490,1sleep00-21swapper/008:38:200
109472480,2sleep20-21swapper/207:38:122
109472480,2sleep20-21swapper/207:38:122
298742450,2chrt0-21swapper/108:28:121
298742450,2chrt0-21swapper/108:28:121
298742450,2chrt0-21swapper/108:28:121
214852450,3sleep20-21swapper/210:58:152
214852450,3sleep20-21swapper/210:58:152
214852450,3sleep20-21swapper/210:58:152
291702440,3sleep30-21swapper/309:53:123
291702440,3sleep30-21swapper/309:53:123
291702440,3sleep30-21swapper/309:53:123
82912430,3chrt0-21swapper/211:48:202
82912430,3chrt0-21swapper/211:48:202
1389994133,6cyclictest1648-21ntpd09:18:171
1389994133,6cyclictest1648-21ntpd09:18:171
1389994133,6cyclictest1648-21ntpd09:18:171
222762400,4sleep30-21swapper/312:28:093
222762400,4sleep30-21swapper/312:28:093
280852390,4sleep20-21swapper/209:48:202
280852390,4sleep20-21swapper/209:48:202
280852390,4sleep20-21swapper/209:48:202
164652380,3sleep016458-21tail09:18:160
164652380,3sleep016458-21tail09:18:160
164652380,3sleep016458-21tail09:18:160
1388993828,7cyclictest5823-21netstat07:23:160
1388993828,7cyclictest5823-21netstat07:23:160
222332370,3sleep20-21swapper/208:08:112
222332370,3sleep20-21swapper/208:08:112
150862370,3chrt0-21swapper/307:48:143
150862370,3chrt0-21swapper/307:48:143
150862370,3chrt0-21swapper/307:48:143
1388993715,5cyclictest201rcuc/011:14:060
1388993715,5cyclictest201rcuc/011:14:060
107292370,3sleep30-21swapper/307:38:103
107292370,3sleep30-21swapper/307:38:103
1388993632,3cyclictest60-21kcompactd011:25:070
1388993632,3cyclictest60-21kcompactd011:25:070
123732360,3chrt0-21swapper/209:08:132
123732360,3chrt0-21swapper/209:08:132
123732360,3chrt0-21swapper/209:08:132
207632350,2sleep30-21swapper/308:03:143
207632350,2sleep30-21swapper/308:03:143
212592340,3sleep20-21swapper/209:33:012
212592340,3sleep20-21swapper/209:33:012
139299341,26cyclictest0-21swapper/212:09:282
139299341,26cyclictest0-21swapper/212:09:282
139299341,26cyclictest0-21swapper/212:09:282
139299341,24cyclictest0-21swapper/207:53:402
139299341,24cyclictest0-21swapper/207:53:402
139299341,24cyclictest0-21swapper/207:53:402
1389993424,7cyclictest26054-21fschecks_time12:38:111
1389993424,7cyclictest26054-21fschecks_time12:38:111
1389993424,7cyclictest26054-21fschecks_time12:38:111
94862330,3chrt0-21swapper/307:33:143
94862330,3chrt0-21swapper/307:33:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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