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2026-07-31 - 16:36

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 Jul 31, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168632940,3sleep10-21swapper/107:43:501
168632940,3sleep10-21swapper/107:43:501
315462900,2sleep20-21swapper/211:14:002
315462900,2sleep20-21swapper/211:14:002
315462900,2sleep20-21swapper/211:14:002
88732630,2sleep10-21swapper/108:48:501
315902530,3sleep30-21swapper/308:23:493
296352500,3sleep20-21swapper/209:43:512
296352500,3sleep20-21swapper/209:43:512
147652500,4sleep20-21swapper/209:03:552
147652500,4sleep20-21swapper/209:03:552
193092440,2sleep20-21swapper/210:43:492
29432430,3chrt0-21swapper/309:58:553
29432430,3chrt0-21swapper/309:58:553
137532430,4sleep30-21swapper/307:33:593
137532430,4sleep30-21swapper/307:33:593
218512420,2chrt0-21swapper/310:48:563
218512420,2chrt0-21swapper/310:48:563
5368994132,7cyclictest31449-21sendmail12:43:360
5368994132,7cyclictest31449-21sendmail12:43:360
5368994132,7cyclictest31449-21sendmail12:43:360
258342410,1sleep10-21swapper/108:08:421
258342410,1sleep10-21swapper/108:08:421
166412400,3sleep20-21swapper/212:03:442
166412400,3sleep20-21swapper/212:03:442
5369993925,4cyclictest181rcu_preempt12:30:071
5369993925,4cyclictest181rcu_preempt12:30:071
5369993925,4cyclictest181rcu_preempt12:30:071
160612390,2sleep116219-21cut09:08:491
160612390,2sleep116219-21cut09:08:491
295182380,3sleep30-21swapper/311:08:583
270322380,3sleep20-21swapper/209:38:402
270322380,3sleep20-21swapper/209:38:402
112932380,2sleep10-21swapper/111:48:491
38392370,4sleep13842-21timerandwakeup08:33:591
270202370,3sleep30-21swapper/311:03:523
270202370,3sleep30-21swapper/311:03:523
235432360,8chrt23524-21unixbench_singl12:18:591
235432360,8chrt23524-21unixbench_singl12:18:591
5369993528,5cyclictest6157-21netstat11:33:521
5369993528,5cyclictest6157-21netstat11:33:521
5369993527,6cyclictest24142-21netstat09:28:541
5369993527,6cyclictest24142-21netstat09:28:541
5368993525,8cyclictest472-21netstat11:18:550
5368993525,8cyclictest472-21netstat11:18:550
242892350,4chrt0-21swapper/208:03:492
242892350,4chrt0-21swapper/208:03:492
60422330,3sleep30-21swapper/311:33:513
60422330,3sleep30-21swapper/311:33:513
536999338,4cyclictest281ktimers/109:13:501
5369993326,5cyclictest5365-21cyclictest10:11:051
5369993321,3cyclictest181rcu_preempt11:39:191
5369993321,3cyclictest181rcu_preempt11:39:191
5368993326,5cyclictest550-21cron08:53:350
5368993325,6cyclictest19480-21gltestperf10:43:500
5368993325,6cyclictest19480-21gltestperf10:43:500
100632330,3sleep30-21swapper/310:18:493
100632330,3sleep30-21swapper/310:18:493
5369993227,3cyclictest90-1pr/ttyS012:10:361
5369993227,3cyclictest90-1pr/ttyS012:10:361
5369993226,4cyclictest1346-21avahi-daemon10:33:571
5369993226,4cyclictest1346-21avahi-daemon10:33:571
5369993225,5cyclictest32139-21latency_hist11:18:401
5369993225,5cyclictest32139-21latency_hist11:18:401
5369993225,5cyclictest32139-21latency_hist11:18:401
5369993225,5cyclictest10509-21fschecks_count08:53:491
5369993225,5cyclictest10509-21fschecks_count08:53:491
5369993223,7cyclictest7267-21netstat08:43:541
5369993223,2cyclictest181rcu_preempt08:28:451
5369993223,2cyclictest181rcu_preempt08:28:451
536999314,5cyclictest271rcuc/107:24:141
5369993126,3cyclictest0-21swapper/111:03:361
5369993126,3cyclictest0-21swapper/111:03:361
5369993124,5cyclictest5365-21cyclictest11:59:191
5369993124,5cyclictest5365-21cyclictest11:59:191
5369993124,4cyclictest281ktimers/111:58:361
5369993124,4cyclictest281ktimers/111:58:361
5369993122,7cyclictest20401-21fschecks_count07:53:501
5368993125,4cyclictest29554-21cron12:38:360
5368993125,4cyclictest29554-21cron12:38:360
5368993124,5cyclictest15055-21fschecks_time11:58:470
5368993124,5cyclictest15055-21fschecks_time11:58:470
5368993123,6cyclictest9023-21apache210:08:140
5368993123,6cyclictest9023-21apache210:08:140
5368993123,5cyclictest9534-21kernelversion07:23:510
281192310,3sleep30-21swapper/312:33:483
281192310,3sleep30-21swapper/312:33:483
5369993025,3cyclictest0-21swapper/112:18:361
5369993025,3cyclictest0-21swapper/112:18:361
5369993023,5cyclictest12333-21netstat10:23:551
5369993023,5cyclictest12333-21netstat10:23:551
5369993022,6cyclictest3694-21fschecks_count11:28:481
5369993010,12cyclictest90-1pr/ttyS007:33:461
5369993010,12cyclictest90-1pr/ttyS007:33:461
5368993024,5cyclictest7096-21latency_hist11:38:360
5368993024,5cyclictest7096-21latency_hist11:38:360
5368993021,7cyclictest2414-21fschecks_time09:58:480
5368993021,7cyclictest2414-21fschecks_time09:58:480
5368993015,3cyclictest181rcu_preempt12:30:070
5368993015,3cyclictest181rcu_preempt12:30:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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