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2026-09-19 - 10:27

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 Sat Sep 19, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
176721250,4sleep00-21swapper/023:19:360
176721250,4sleep00-21swapper/023:19:360
176721250,4sleep00-21swapper/023:19:360
59032720,5sleep05904-21latency_hist20:39:240
59032720,5sleep05904-21latency_hist20:39:240
295402720,2sleep029542-21awk20:14:360
295402720,2sleep029542-21awk20:14:360
152342640,3chrt0-21swapper/021:04:210
152342640,3chrt0-21swapper/021:04:210
39532550,1sleep14110-21timerwakeupswit23:24:451
39532550,1sleep14110-21timerwakeupswit23:24:451
72812520,2sleep20-21swapper/222:09:272
72812520,2sleep20-21swapper/222:09:272
26092510,2sleep20-21swapper/220:29:332
26092510,2sleep20-21swapper/220:29:332
222502510,1sleep122274-21cat22:49:271
170232500,3sleep20-21swapper/219:39:442
170232500,3sleep20-21swapper/219:39:442
309762490,3sleep029812-21/usr/sbin/munin23:09:430
309762490,3sleep029812-21/usr/sbin/munin23:09:430
166702490,2sleep116672-21gzip19:39:391
166702490,2sleep116672-21gzip19:39:391
36552480,3sleep30-21swapper/321:59:313
36552480,3sleep30-21swapper/321:59:313
218092450,3sleep20-21swapper/219:54:322
188582430,2sleep20-21swapper/222:39:342
188582430,2sleep20-21swapper/222:39:342
7044994235,3cyclictest0-21swapper/000:04:250
7044994235,3cyclictest0-21swapper/000:04:250
7044994235,3cyclictest0-21swapper/000:04:250
295002420,2chrt29502-21grep00:34:340
295002420,2chrt29502-21grep00:34:340
291962420,4sleep30-21swapper/323:04:443
291962420,4sleep30-21swapper/323:04:443
7044994035,3cyclictest0-21swapper/000:04:340
7044993934,3cyclictest17665-21wc19:44:210
7044993934,3cyclictest17665-21wc19:44:210
58482390,3chrt5472-21/usr/sbin/munin22:04:350
58482390,3chrt5472-21/usr/sbin/munin22:04:350
141412380,3sleep30-21swapper/320:59:373
141412380,3sleep30-21swapper/320:59:373
7044993732,3cyclictest18383-21cat22:39:210
7044993731,4cyclictest572-21cups-browsed21:24:410
7052993527,5cyclictest545-21in:imuxsock22:54:211
7044993529,4cyclictest201rcuc/000:18:040
7044993529,4cyclictest201rcuc/000:18:040
7044993528,5cyclictest9666-21threads23:39:440
7044993528,5cyclictest9666-21threads23:39:440
7044993528,5cyclictest32741-21sendmail00:44:210
7044993528,5cyclictest32741-21sendmail00:44:210
227832340,1sleep122797-21cut21:24:251
227832340,1sleep122797-21cut21:24:251
186212340,2sleep20-21swapper/200:04:382
705799332,23cyclictest17906-21chrt00:04:253
705799332,23cyclictest17906-21chrt00:04:253
705799332,23cyclictest17906-21chrt00:04:253
7044993327,4cyclictest20250-21wc22:44:210
7044993327,4cyclictest20250-21wc22:44:210
266762330,1sleep026677-21sshd20:05:160
266762330,1sleep026677-21sshd20:05:160
7056993225,4cyclictest21544-21chrt00:14:222
7056993225,4cyclictest21544-21chrt00:14:222
705699322,23cyclictest17896-21chrt00:04:242
705699322,23cyclictest17896-21chrt00:04:242
705699322,23cyclictest17896-21chrt00:04:242
7052993227,3cyclictest4865-21ntp_kernel_pll_20:34:391
7052993227,3cyclictest4865-21ntp_kernel_pll_20:34:391
7052993226,4cyclictest7036-21cyclictest00:04:211
7052993226,4cyclictest7036-21cyclictest00:04:211
7052993226,4cyclictest7036-21cyclictest00:04:211
7044993228,2cyclictest90-1pr/ttyS020:39:280
7044993228,2cyclictest90-1pr/ttyS020:39:280
7044993225,5cyclictest17898-21missed_timers21:09:370
7044993225,5cyclictest17898-21missed_timers21:09:370
7052993122,7cyclictest22101-21kernelversion19:54:341
7044993121,3cyclictest0-21swapper/021:49:370
7044993121,3cyclictest0-21swapper/021:49:370
161342310,2chrt0-21swapper/122:29:441
7052993025,3cyclictest5271-21latency_hist22:04:211
7052993025,3cyclictest5271-21latency_hist22:04:211
7052993024,4cyclictest0-21swapper/123:44:211
7052993024,4cyclictest0-21swapper/123:44:211
705299302,23cyclictest18866-21processes00:04:411
7052993021,7cyclictest20111-21fschecks_time00:09:341
7052993021,7cyclictest20111-21fschecks_time00:09:341
7044993025,4cyclictest572-21cups-browsed22:19:420
7044993025,4cyclictest572-21cups-browsed22:19:420
7044993025,3cyclictest90-1pr/ttyS023:26:030
7044993025,3cyclictest90-1pr/ttyS023:26:030
7044993024,5cyclictest770-21sshd23:18:020
7044993024,5cyclictest770-21sshd23:18:020
7044993023,5cyclictest11049-21unixbench_singl20:49:440
7056992922,4cyclictest293842chrt21:39:442
7056992922,4cyclictest293842chrt21:39:442
7052992923,4cyclictest545-21in:imuxsock20:09:211
7052992923,4cyclictest545-21in:imuxsock20:09:211
7052992923,3cyclictest0-21swapper/122:24:211
7052992923,3cyclictest0-21swapper/122:24:211
7052992913,7cyclictest700-21192.168.115.40-manager21:31:291
7044992923,4cyclictest1-21systemd20:24:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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