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2026-09-04 - 08:45

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 Sep 04, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1463421130,2chrt14633-21irqstats00:09:231
121302980,2chrt12124-21gzip21:09:240
121302980,2chrt12124-21gzip21:09:240
267762820,3sleep20-21swapper/220:24:072
267762820,3sleep20-21swapper/220:24:072
265912780,3chrt0-21swapper/223:14:282
159612580,2sleep30-21swapper/319:54:213
1266995842,12cyclictest0-21swapper/000:04:120
1266995842,12cyclictest0-21swapper/000:04:120
94022570,3chrt0-21swapper/222:29:222
326482530,4chrt0-21swapper/322:04:223
326482530,4chrt0-21swapper/322:04:223
1266995244,6cyclictest0-21swapper/000:04:200
87182490,3sleep20-21swapper/222:27:372
247502450,2chrt0-21swapper/000:34:340
249812440,3sleep10-21swapper/100:37:251
28222420,3sleep20-21swapper/220:44:252
28222420,3sleep20-21swapper/220:44:252
204212410,2sleep00-21swapper/020:04:280
204212410,2sleep00-21swapper/020:04:280
37102400,1sleep03713-21tr22:14:240
37102400,1sleep03713-21tr22:14:240
266752380,3sleep00-21swapper/023:14:300
118342380,3sleep10-21swapper/121:09:211
118342380,3sleep10-21swapper/121:09:211
74832370,4sleep00-21swapper/022:24:210
60282370,2sleep30-21swapper/322:19:263
60282370,2sleep30-21swapper/322:19:263
271222370,7sleep0171ktimers/021:49:240
271222370,7sleep0171ktimers/021:49:240
1266993731,4cyclictest201rcuc/022:39:590
1266993731,4cyclictest201rcuc/022:39:590
73292360,3sleep20-21swapper/223:49:262
312842360,1sleep131447-21head21:59:311
312842360,1sleep131447-21head21:59:311
29482360,3sleep20-21swapper/223:39:212
29482360,3sleep20-21swapper/223:39:212
29482360,3sleep20-21swapper/223:39:212
236142360,1sleep123737-21timerandwakeup21:39:291
236142360,1sleep123737-21timerandwakeup21:39:291
1266993629,5cyclictest19523-21sendmail00:24:070
1266993629,5cyclictest19523-21sendmail00:24:070
1266993629,5cyclictest19523-21sendmail00:24:070
1266993614,5cyclictest201rcuc/020:14:590
1266993614,5cyclictest201rcuc/020:14:590
140352350,2sleep00-21swapper/019:49:200
140352350,2sleep00-21swapper/019:49:200
140372340,3sleep30-21swapper/321:14:253
140372340,3sleep30-21swapper/321:14:253
128099342,22cyclictest12154-21taskset00:04:132
128099342,22cyclictest12154-21taskset00:04:132
1277993426,6cyclictest1255-21cyclictest23:39:181
1277993426,6cyclictest1255-21cyclictest23:39:181
1277993426,6cyclictest1255-21cyclictest23:39:181
1277993425,6cyclictest749-21runrttasks19:29:321
1266993427,5cyclictest17394-21processes22:49:280
1266993427,5cyclictest17394-21processes22:49:280
1277993314,14cyclictest12919-21gzip00:04:261
1266993326,5cyclictest31410-21needreboot20:34:230
1266993326,5cyclictest1255-21cyclictest20:59:270
1266993324,7cyclictest25066-21threads23:09:280
1266993324,7cyclictest25066-21threads23:09:280
1277993227,4cyclictest21949-21gltestperf00:29:211
1277993227,4cyclictest21949-21gltestperf00:29:211
1266993225,5cyclictest201rcuc/023:45:250
1266993224,6cyclictest8531-21fschecks_time19:34:210
1266993211,7cyclictest16-21ksoftirqd/000:44:080
1266993211,7cyclictest16-21ksoftirqd/000:44:080
1266993211,7cyclictest16-21ksoftirqd/000:44:080
5262310,2sleep10-21swapper/120:39:231
5262310,2sleep10-21swapper/120:39:231
208372310,3sleep10-21swapper/100:24:301
182892310,11sleep1281ktimers/121:24:321
182892310,11sleep1281ktimers/121:24:321
1277993124,5cyclictest19153-21cut21:29:221
1277993124,5cyclictest1255-21cyclictest20:44:301
1277993124,5cyclictest1255-21cyclictest20:44:301
1266993126,3cyclictest1255-21cyclictest19:39:170
1266993126,3cyclictest1255-21cyclictest19:39:170
1277993024,4cyclictest5962-21fschecks_count20:54:191
1277993024,4cyclictest5962-21fschecks_count20:54:191
1277993024,4cyclictest26792-21wc20:24:071
1277993024,4cyclictest26792-21wc20:24:071
126699305,5cyclictest201rcuc/021:18:380
126699305,5cyclictest201rcuc/021:18:380
126699305,5cyclictest201rcuc/019:29:170
1266993023,5cyclictest21019-21cut21:34:250
1266993023,5cyclictest21019-21cut21:34:250
1266993023,4cyclictest0-21swapper/022:04:290
1266993023,4cyclictest0-21swapper/022:04:290
1266993022,6cyclictest28033-21fschecks_time23:19:210
1266993022,6cyclictest28033-21fschecks_time23:19:210
1277992923,4cyclictest25836-21kernelversion00:39:241
1277992923,4cyclictest25836-21kernelversion00:39:241
1277992923,4cyclictest25836-21kernelversion00:39:241
1277992920,6cyclictest13139-21gltestperf22:39:211
1277992920,6cyclictest13139-21gltestperf22:39:211
1277992919,6cyclictest601-21snmpd21:36:301
1277992919,6cyclictest601-21snmpd21:36:301
126699296,19cyclictest171ktimers/020:25:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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