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2026-07-26 - 18:41

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 Sun Jul 26, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2112721530,3sleep20-21swapper/207:33:432
29412840,2sleep12942-21/usr/sbin/munin11:03:501
29412840,2sleep12942-21/usr/sbin/munin11:03:501
227792790,2sleep30-21swapper/309:03:493
227792790,2sleep30-21swapper/309:03:493
186822710,2chrt18683-21sendmail_mailqu10:18:521
186822710,2chrt18683-21sendmail_mailqu10:18:521
321672680,2sleep30-21swapper/310:53:553
321672680,2sleep30-21swapper/310:53:553
113752670,3sleep10-21swapper/109:58:541
175402640,3sleep20-21swapper/208:48:522
316452610,3sleep20-21swapper/210:53:502
316452610,3sleep20-21swapper/210:53:502
9072600,1chrt0-21swapper/112:23:541
314972600,3sleep20-21swapper/209:28:442
139982570,2chrt0-21swapper/211:33:462
139982570,2chrt0-21swapper/211:33:462
293862550,3sleep10-21swapper/112:13:541
293862550,3sleep10-21swapper/112:13:541
133862550,1sleep0171ktimers/010:03:560
133862550,1sleep0171ktimers/010:03:560
100412490,4chrt0-21swapper/309:58:003
100412490,4chrt0-21swapper/309:58:003
190512480,4sleep30-21swapper/311:48:393
190512480,4sleep30-21swapper/311:48:393
132122480,3sleep30-21swapper/310:03:563
132122480,3sleep30-21swapper/310:03:563
245362470,2sleep129-21ksoftirqd/109:08:451
245362470,2sleep129-21ksoftirqd/109:08:451
167012410,2sleep10-21swapper/110:13:501
167012410,2sleep10-21swapper/110:13:501
13589994136,4cyclictest30676-21sed12:18:471
13589994136,4cyclictest30676-21sed12:18:471
83022400,10sleep1281ktimers/108:23:551
83022400,10sleep1281ktimers/108:23:551
193982390,2sleep10-21swapper/111:48:461
193982390,2sleep10-21swapper/111:48:461
147572390,3sleep30-21swapper/310:08:493
147572390,3sleep30-21swapper/310:08:493
320482370,2chrt0-21swapper/212:23:352
320482370,2chrt0-21swapper/212:23:352
13588993728,6cyclictest13587-21cyclictest09:03:560
13588993728,6cyclictest13587-21cyclictest09:03:560
260372360,3chrt0-21swapper/210:38:512
260372360,3chrt0-21swapper/210:38:512
13589993629,5cyclictest23208-21gltestperf11:58:441
227922350,2sleep022922-21fschecks_time07:38:440
227922350,2sleep022922-21fschecks_time07:38:440
13589993529,4cyclictest545-21in:imuxsock10:33:311
13589993529,4cyclictest545-21in:imuxsock10:33:311
13589993527,5cyclictest31962-21latency_hist08:03:381
13589993527,5cyclictest31962-21latency_hist08:03:381
13589993526,7cyclictest13221-21kernelversion08:38:471
13588993528,5cyclictest1986-21sendmail11:03:310
13588993528,5cyclictest1986-21sendmail11:03:310
63052340,3sleep20-21swapper/212:38:552
63052340,3sleep20-21swapper/212:38:552
13589993426,6cyclictest10673-21latency_hist08:33:321
13589993426,6cyclictest10673-21latency_hist08:33:321
13588993428,3cyclictest0-21swapper/012:23:320
13588993428,3cyclictest0-21swapper/012:23:320
196332330,4chrt0-21swapper/208:53:552
181732330,2sleep30-21swapper/308:53:313
158932330,3sleep10-21swapper/111:38:481
1359299331,2cyclictest0-21swapper/312:29:473
1359299331,2cyclictest0-21swapper/312:29:473
1359299331,1cyclictest0-21swapper/311:42:153
13589993327,4cyclictest13587-21cyclictest09:03:541
13589993327,4cyclictest13587-21cyclictest09:03:541
13589993325,6cyclictest7571-21threads09:48:541
13589993325,6cyclictest7571-21threads09:48:541
13588993326,5cyclictest545-21in:imuxsock07:53:310
13588993326,5cyclictest545-21in:imuxsock07:53:310
13588993324,7cyclictest30422-21fschecks_time07:58:460
13588993324,7cyclictest30422-21fschecks_time07:58:460
77812320,3sleep30-21swapper/308:23:503
77812320,3sleep30-21swapper/308:23:503
1359299321,2cyclictest0-21swapper/311:50:153
1359299321,2cyclictest0-21swapper/311:50:153
13589993225,5cyclictest26924-21kernelversion07:48:461
13589993225,5cyclictest26924-21kernelversion07:48:461
13588993227,3cyclictest0-21swapper/009:23:310
13588993227,3cyclictest0-21swapper/009:23:310
13588993226,4cyclictest24489-21sendmail12:03:310
13588993223,7cyclictest16204-21fschecks_time10:13:440
13588993223,7cyclictest16204-21fschecks_time10:13:440
13589993126,3cyclictest7036-21cron12:43:321
13589993126,3cyclictest7036-21cron12:43:321
13589993124,5cyclictest6507-21sshd08:18:591
13589993124,5cyclictest4786-21netstat11:08:491
13589993124,5cyclictest4786-21netstat11:08:491
13588993125,4cyclictest13587-21cyclictest08:43:320
13588993123,6cyclictest11023-21fschecks_count08:33:460
13588993123,6cyclictest11023-21fschecks_count08:33:460
91152300,3sleep20-21swapper/209:53:482
91152300,3sleep20-21swapper/209:53:482
260662300,3sleep20-21swapper/209:13:492
260662300,3sleep20-21swapper/209:13:492
1359299301,2cyclictest0-21swapper/310:27:133
1359299301,2cyclictest0-21swapper/310:27:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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