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2025-04-02 - 17:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 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.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rackcslot7s.osadl.org (updated Wed Apr 02, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39044462960,6sleep20-21swapper/208:40:022
39273382920,7sleep10-21swapper/109:50:151
387172999922,7cyclictest0-21swapper/211:51:382
387172999922,7cyclictest0-21swapper/211:51:372
387172999912,6cyclictest0-21swapper/211:46:392
387172499782,10cyclictest0-21swapper/011:47:170
387172499766,9cyclictest141rcu_preempt11:58:410
387172499762,14cyclictest0-21swapper/012:03:090
387140227639,13sleep30-21swapper/307:07:393
387172499753,48cyclictest1753-21gnome-shell11:51:490
387172499753,48cyclictest1753-21gnome-shell11:51:490
387173199742,12cyclictest1753-21gnome-shell12:03:143
387040627450,18sleep20-21swapper/207:05:172
3871731997356,6cyclictest42-21ksoftirqd/311:53:563
3871731997356,6cyclictest42-21ksoftirqd/311:53:563
387172999723,12cyclictest1753-21gnome-shell11:57:212
387172999713,10cyclictest1753-21gnome-shell12:03:362
387173199702,48cyclictest1753-21gnome-shell11:48:313
387050027048,13sleep00-21swapper/007:05:190
39051042690,5sleep0161rcuc/008:40:200
3871728996615,9cyclictest26-21ksoftirqd/112:00:301
3871731996548,12cyclictest1753-21gnome-shell11:58:573
387128126444,14sleep10-21swapper/107:06:041
3871729996219,14cyclictest438-20systemd-journal08:20:002
3871728996252,7cyclictest26-21ksoftirqd/111:50:261
3871728996252,7cyclictest26-21ksoftirqd/111:50:251
387172899603,17cyclictest26-21ksoftirqd/111:49:491
162399590,8rtkit-daemon1622-21rtkit-daemon07:20:001
39508932570,5sleep2331rcuc/211:10:232
3871729995714,22cyclictest438-20systemd-journal09:59:562
3871728995721,19cyclictest26-21ksoftirqd/108:00:021
387172999561,31cyclictest1753-21gnome-shell09:25:002
3871729995522,13cyclictest3242254-21gmain09:20:002
3871729995519,10cyclictest3897842-21expr08:20:152
387172899552,49cyclictest3962898-21grep11:55:151
162399550,9rtkit-daemon1622-21rtkit-daemon12:09:521
3871731995430,20cyclictest1753-21gnome-shell11:10:083
3871731995429,20cyclictest1753-21gnome-shell10:30:153
3871729995423,6cyclictest3957724-21cron11:35:012
3871729995410,24cyclictest1753-21gnome-shell12:25:092
162399540,9rtkit-daemon1622-21rtkit-daemon07:12:531
162399540,8rtkit-daemon1622-21rtkit-daemon09:47:173
3871729995318,12cyclictest1632-21dbus-daemon11:10:032
3871729995318,10cyclictest3911763-21cat09:00:152
162399530,8rtkit-daemon1622-21rtkit-daemon09:38:392
3871729995221,6cyclictest3904509-21/usr/sbin/munin08:40:212
387172899520,48cyclictest1622-21rtkit-daemon12:10:541
39274282510,14chrt3927429-21latency09:50:172
39181832510,19sleep126-21ksoftirqd/109:17:161
3871729995120,8cyclictest3975284-21swap12:35:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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