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2026-08-18 - 21:00

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 Tue Aug 18, 2026 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1189321280,3sleep20-21swapper/209:59:042
1189321280,3sleep20-21swapper/209:59:042
1189321280,3sleep20-21swapper/209:59:042
802321270,2sleep10-21swapper/112:39:151
802321270,2sleep10-21swapper/112:39:151
802321270,2sleep10-21swapper/112:39:151
214942860,2sleep30-21swapper/310:24:063
315132800,3sleep20-21swapper/209:24:072
315132800,3sleep20-21swapper/209:24:072
180892730,3sleep10-21swapper/108:49:051
272012700,2sleep027205-21sed07:44:150
86942560,3sleep18687-21gzip09:49:101
86942560,3sleep18687-21gzip09:49:101
159972540,3chrt0-21swapper/308:43:563
159972540,3chrt0-21swapper/308:43:563
11832460,3sleep30-21swapper/308:04:043
11832460,3sleep30-21swapper/308:04:043
15146994538,5cyclictest1049-21sendmail12:23:521
15146994538,5cyclictest1049-21sendmail12:23:521
275812430,4sleep30-21swapper/310:39:133
275812430,4sleep30-21swapper/310:39:133
46972380,3sleep30-21swapper/309:39:073
46972380,3sleep30-21swapper/309:39:073
100222380,2sleep30-21swapper/311:19:093
100222380,2sleep30-21swapper/311:19:093
261022370,3sleep30-21swapper/312:03:563
261022370,3sleep30-21swapper/312:03:563
166382360,3chrt0-21swapper/310:09:143
15146993628,6cyclictest1-21systemd09:59:051
15146993628,6cyclictest1-21systemd09:59:051
15146993628,6cyclictest1-21systemd09:59:051
15145993621,2cyclictest181rcu_preempt08:13:460
15145993621,2cyclictest181rcu_preempt08:13:460
264332350,2sleep126436-21fschecks_count12:04:051
193552350,5sleep119361-21cpu10:19:011
193552350,5sleep119361-21cpu10:19:011
193552350,5sleep119361-21cpu10:19:011
140822350,3sleep30-21swapper/311:29:143
15146993427,5cyclictest572-21cups-browsed08:03:521
15146993427,5cyclictest572-21cups-browsed08:03:521
15146993419,4cyclictest281ktimers/112:33:541
15146993419,4cyclictest281ktimers/112:33:541
15146993329,2cyclictest0-21swapper/107:29:051
15145993323,8cyclictest10697-21fschecks_time08:29:070
15145993313,11cyclictest181rcu_preempt09:44:050
227172320,1sleep2351rcuc/211:54:052
227172320,1sleep2351rcuc/211:54:052
210592320,3sleep20-21swapper/211:49:072
15146993226,4cyclictest281ktimers/111:14:061
15146993226,4cyclictest281ktimers/111:14:061
15145993226,4cyclictest22785-21gltestperf11:54:060
15145993226,4cyclictest22785-21gltestperf11:54:060
15145993219,11cyclictest0-21swapper/008:54:040
13022320,4sleep1281ktimers/112:24:031
13022320,4sleep1281ktimers/112:24:031
15146993124,5cyclictest27099-21cron09:13:531
15145993126,3cyclictest5419-21unixbench-2d09:39:160
15145993126,3cyclictest5419-21unixbench-2d09:39:160
15145993125,5cyclictest1097-21idleruntime-cro12:23:530
15145993125,5cyclictest1097-21idleruntime-cro12:23:530
15145993125,4cyclictest0-21swapper/012:43:530
15145993125,4cyclictest0-21swapper/012:43:530
15145993125,4cyclictest0-21swapper/012:43:530
15145993124,2cyclictest181rcu_preempt12:28:070
15145993124,2cyclictest181rcu_preempt12:28:070
15145993123,6cyclictest32358-21tr07:59:110
15145993123,6cyclictest32358-21tr07:59:110
183352300,2sleep018338-21sendmail_mailqu10:14:140
183352300,2sleep018338-21sendmail_mailqu10:14:140
183352300,2sleep018338-21sendmail_mailqu10:14:140
15146993025,3cyclictest13773-21missed_timers11:29:091
15146993024,5cyclictest21924-21netstat10:24:111
15146993023,5cyclictest17246-21latency_hist10:13:521
15145993024,4cyclictest3349-21fschecks_count12:29:050
15145993024,4cyclictest3349-21fschecks_count12:29:050
15145993024,4cyclictest20436-21timerwakeupswit10:19:130
15145993024,4cyclictest20436-21timerwakeupswit10:19:130
15145993024,4cyclictest20436-21timerwakeupswit10:19:130
15145993021,7cyclictest21498-21cut10:24:060
15145993018,11cyclictest18525-21latency_hist11:43:520
15145993018,11cyclictest18525-21latency_hist11:43:520
15145993014,2cyclictest181rcu_preempt10:52:420
15146992923,4cyclictest981-21if_wlan009:29:081
15146992923,4cyclictest981-21if_wlan009:29:081
15146992923,4cyclictest23967-21cut09:04:051
15146992923,4cyclictest23967-21cut09:04:051
15146992923,3cyclictest0-21swapper/110:59:051
15146992923,3cyclictest0-21swapper/110:59:051
15146992923,3cyclictest0-21swapper/110:59:051
15146992922,5cyclictest13895-21cut10:04:061
15146992922,5cyclictest13895-21cut10:04:061
15145992924,3cyclictest0-21swapper/010:03:520
15145992924,3cyclictest0-21swapper/010:03:520
15145992924,3cyclictest0-21swapper/010:03:520
15145992922,5cyclictest26282-21sshd10:35:060
15145992914,3cyclictest181rcu_preempt11:12:060
15146992824,3cyclictest30336-21idleruntime-cro10:48:521
15146992824,3cyclictest30336-21idleruntime-cro10:48:521
15146992824,3cyclictest18542-21timerwakeupswit10:14:151
15146992824,3cyclictest18542-21timerwakeupswit10:14:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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