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2026-07-09 - 02:45

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 Thu Jul 09, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1191921150,2sleep0201rcuc/019:53:310
1191921150,2sleep0201rcuc/019:53:310
1191921150,2sleep0201rcuc/019:53:310
31572990,3sleep00-21swapper/022:23:290
31572990,3sleep00-21swapper/022:23:290
31572990,3sleep00-21swapper/022:23:290
177512970,3sleep00-21swapper/000:28:320
177512970,3sleep00-21swapper/000:28:320
177512970,3sleep00-21swapper/000:28:320
36452920,2sleep20-21swapper/220:58:292
36452920,2sleep20-21swapper/220:58:292
36452920,2sleep20-21swapper/220:58:292
249792820,4sleep024980-21cat23:23:150
249792820,4sleep024980-21cat23:23:150
14662640,3sleep20-21swapper/219:25:062
14662640,3sleep20-21swapper/219:25:062
14662640,3sleep20-21swapper/219:25:062
285932620,1sleep00-21swapper/020:38:290
285932620,1sleep00-21swapper/020:38:290
29152590,2sleep02920-21proc_pri23:48:360
29152590,2sleep02920-21proc_pri23:48:360
148102590,1sleep00-21swapper/000:20:150
148102590,1sleep00-21swapper/000:20:150
29194995640,11cyclictest7686-21/usr/sbin/munin00:03:401
29194995640,11cyclictest7686-21/usr/sbin/munin00:03:401
84532520,2sleep30-21swapper/300:03:343
84532520,2sleep30-21swapper/300:03:343
257062510,2sleep025693-21acpi21:58:250
257062510,2sleep025693-21acpi21:58:250
257062510,2sleep025693-21acpi21:58:250
257062510,2sleep025693-21acpi21:58:250
92212500,3sleep20-21swapper/221:13:282
92212500,3sleep20-21swapper/221:13:282
60402490,3sleep30-21swapper/319:38:263
60402490,3sleep30-21swapper/319:38:263
240762480,4chrt0-21swapper/323:18:363
240762480,4chrt0-21swapper/323:18:363
248482470,3sleep30-21swapper/321:53:383
248482470,3sleep30-21swapper/321:53:383
248482470,3sleep30-21swapper/321:53:383
248482470,3sleep30-21swapper/321:53:383
190592440,2sleep30-21swapper/320:13:283
190592440,2sleep30-21swapper/320:13:283
2919299422,31cyclictest7638-21sed00:03:210
2919299422,31cyclictest7638-21sed00:03:210
2919299422,31cyclictest7638-21sed00:03:210
2919299414,33cyclictest8627-21grep00:03:370
2919299414,33cyclictest8627-21grep00:03:370
214262400,3sleep20-21swapper/220:18:332
214262400,3sleep20-21swapper/220:18:332
118382400,2chrt11462-21/usr/sbin/munin00:13:280
212142390,3sleep30-21swapper/300:38:293
212142390,3sleep30-21swapper/300:38:293
212142390,3sleep30-21swapper/300:38:293
19312390,3sleep20-21swapper/222:18:372
19312390,3sleep20-21swapper/222:18:372
19312390,3sleep20-21swapper/222:18:372
18622390,3sleep20-21swapper/220:53:302
18622390,3sleep20-21swapper/220:53:302
75892380,3sleep30-21swapper/300:03:193
75892380,3sleep30-21swapper/300:03:193
75892380,3sleep30-21swapper/300:03:193
318762380,3sleep20-21swapper/219:18:392
318762380,3sleep20-21swapper/219:18:392
301972370,3sleep20-21swapper/222:08:322
301972370,3sleep20-21swapper/222:08:322
301972370,3sleep20-21swapper/222:08:322
301972370,3sleep20-21swapper/222:08:322
232422370,3chrt0-21swapper/220:23:322
171822370,3sleep2351rcuc/220:08:282
171822370,3sleep2351rcuc/220:08:282
29194993628,6cyclictest21950-21timerandwakeup00:38:371
29194993628,6cyclictest21950-21timerandwakeup00:38:371
29194993628,6cyclictest21950-21timerandwakeup00:38:371
40772350,2sleep04179-21switchtime20:58:360
40772350,2sleep04179-21switchtime20:58:360
40772350,2sleep04179-21switchtime20:58:360
284672350,1sleep128569-21/usr/sbin/munin22:03:371
284672350,1sleep128569-21/usr/sbin/munin22:03:371
29194993425,7cyclictest30940-21fschecks_count23:38:271
29192993427,5cyclictest23063-21threads21:48:380
29192993427,5cyclictest23063-21threads21:48:380
29192993427,5cyclictest23063-21threads21:48:380
259582330,3sleep20-21swapper/221:58:272
259582330,3sleep20-21swapper/221:58:272
259582330,3sleep20-21swapper/221:58:272
259582330,3sleep20-21swapper/221:58:272
240432330,3sleep20-21swapper/221:53:282
240432330,3sleep20-21swapper/221:53:282
29194993225,5cyclictest550-21cron21:43:291
29194993225,5cyclictest550-21cron21:43:291
29192993225,5cyclictest0-21swapper/021:38:260
29192993225,5cyclictest0-21swapper/021:38:260
29192993224,6cyclictest601-21snmpd23:08:260
29192993224,6cyclictest601-21snmpd23:08:260
29192993224,6cyclictest601-21snmpd23:08:260
29194993127,2cyclictest0-21swapper/100:03:311
29194993125,4cyclictest2487-21sendmail22:23:161
29194993125,4cyclictest2487-21sendmail22:23:161
29194993125,4cyclictest2487-21sendmail22:23:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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