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2024-02-24 - 01:39

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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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 Fri Feb 23, 2024 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37879982199124,68sleep20-21swapper/207:08:562
37880552163138,15sleep10-21swapper/107:09:391
378993421130,7sleep03789932-21munin-node07:15:010
3787963210367,9sleep00-21swapper/007:08:310
383061521010,5sleep126-21ksoftirqd/109:06:271
3788227999923,10cyclictest3807389-21ls08:00:323
162399970,37rtkit-daemon881251-21Softwar~cThread11:31:461
3788215999579,11cyclictest881251-21Softwar~cThread09:07:030
3788227999432,58cyclictest42-21ksoftirqd/310:06:113
378821599922,86cyclictest0-21swapper/009:50:360
3788215999082,5cyclictest0-21swapper/012:39:360
378822799889,15cyclictest881251-21Softwar~cThread12:10:293
378822799889,15cyclictest881251-21Softwar~cThread08:55:113
378822399886,10cyclictest0-21swapper/208:00:332
378822799872,20cyclictest1753-21gnome-shell09:02:463
378822799872,20cyclictest1753-21gnome-shell09:02:453
378822399872,20cyclictest1753-21gnome-shell09:23:102
3788227998623,8cyclictest42-21ksoftirqd/307:56:353
3788227998623,8cyclictest42-21ksoftirqd/307:56:343
3788215998678,5cyclictest0-21swapper/012:02:220
3788215998678,5cyclictest0-21swapper/012:02:220
3788215998678,5cyclictest0-21swapper/010:56:100
3788227998516,8cyclictest3846788-21/usr/sbin/munin09:55:413
378822399852,20cyclictest1753-21gnome-shell12:06:142
378822399852,20cyclictest1753-21gnome-shell09:53:092
378821899855,76cyclictest1069-21runrttasks07:29:351
378821899855,76cyclictest1069-21runrttasks07:29:341
3788215998578,4cyclictest0-21swapper/009:25:340
3788227998429,49cyclictest42-21ksoftirqd/307:48:553
3788215998424,17cyclictest881251-21Softwar~cThread12:00:020
378822799838,12cyclictest141rcu_preempt09:47:083
378822799832,75cyclictest881251-21Softwar~cThread07:54:153
3788227998326,16cyclictest42-21ksoftirqd/309:23:113
378822799832,22cyclictest1753-21gnome-shell09:53:133
3788215998366,12cyclictest1753-21gnome-shell11:45:150
3788215998324,53cyclictest1753-21gnome-shell09:20:400
378786228363,13sleep30-21swapper/307:07:133
162399830,12rtkit-daemon1753-21gnome-shell07:23:130
3788227998224,54cyclictest42-21ksoftirqd/312:01:433
3788227998224,54cyclictest42-21ksoftirqd/312:01:433
378822799822,17cyclictest141rcu_preempt11:55:383
378822399822,55cyclictest1753-21gnome-shell11:37:452
378822399822,16cyclictest1753-21gnome-shell09:04:422
378822399822,16cyclictest1753-21gnome-shell09:04:422
378822399822,16cyclictest1753-21gnome-shell07:32:262
3788215998223,54cyclictest1753-21gnome-shell12:06:540
3788215998222,17cyclictest1753-21gnome-shell11:40:580
3788215998220,56cyclictest1753-21gnome-shell07:30:120
162399820,9rtkit-daemon3809092-21memory08:05:330
162399820,8rtkit-daemon913-21wpa_supplicant10:12:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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