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2025-09-18 - 18:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 100 highest latencies:
System rackeslot5s.osadl.org (updated Thu Sep 18, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1373099251,23cyclictest0-21swapper/110:35:021
1373999240,23cyclictest0-21swapper/307:21:323
1373499240,23cyclictest7543-21dump-pmu-power09:09:592
13730992421,2cyclictest0-21swapper/108:05:011
1373099240,2cyclictest313-21systemd-journal09:50:001
1372899240,23cyclictest313-21systemd-journal09:40:000
1372899240,1cyclictest28064-21apt-get10:56:320
13739992321,2cyclictest34-21ksoftirqd/308:34:593
13739992321,1cyclictest10903-21kworker/u8:010:10:003
1373999231,21cyclictest593-21dbus-daemon09:19:593
1373999230,22cyclictest20734-21latency_hist08:29:593
1373999230,22cyclictest18451-21apt-get10:36:283
13734992321,1cyclictest18306-21apt-get10:35:022
1373499231,21cyclictest271rcuc/208:10:002
1373499231,1cyclictest28-21ksoftirqd/207:15:012
1373499230,22cyclictest313-21systemd-journal10:55:002
1373499230,22cyclictest14245-21idleruntime-cro12:40:002
1373499230,1cyclictest2709-21cron09:00:012
13728992323,0cyclictest13200-21apt-get10:26:320
1372899230,22cyclictest29625-21dump-pmu-power09:55:000
1372899230,1cyclictest16329-21apt-get08:21:340
13739992221,1cyclictest0-21swapper/308:46:323
13739992221,1cyclictest0-21swapper/308:46:323
13739992220,1cyclictest593-21dbus-daemon07:34:593
13739992220,1cyclictest27925-21cron08:45:003
1373999220,21cyclictest419-21apt-get11:06:323
1373999220,21cyclictest32155-21apt-get12:11:323
1373999220,21cyclictest18348-21turbostat08:24:593
1373999220,21cyclictest1032-21apt-get07:51:353
1373999220,21cyclictest0-21swapper/309:21:313
1373999220,21cyclictest0-21swapper/309:00:013
1373999220,21cyclictest0-21swapper/308:01:313
13734992220,1cyclictest8230-21dpkg10:15:012
1373499220,21cyclictest593-21dbus-daemon11:50:002
1373499220,21cyclictest31383-21turbostat12:10:002
1373499220,21cyclictest2866-21apt-get11:11:322
1373499220,21cyclictest0-21swapper/209:21:312
1373499220,1cyclictest26611-21basename12:00:002
13730992222,0cyclictest0-21swapper/107:31:321
13730992220,1cyclictest0-21swapper/107:55:001
1373099220,21cyclictest30403-21apt-get09:56:341
1373099220,21cyclictest0-21swapper/112:16:331
1373099220,21cyclictest0-21swapper/110:21:321
1373099220,21cyclictest0-21swapper/109:15:011
1373099220,21cyclictest0-21swapper/108:51:271
1373099220,21cyclictest0-21swapper/108:26:321
1372899220,21cyclictest7354-21apt-get12:26:320
1372899220,21cyclictest679-21apt-get08:56:300
1372899220,21cyclictest5858-21apt-get08:01:300
1372899220,21cyclictest4885-21awk11:15:010
1372899220,21cyclictest18947-21apt-get07:21:320
1372899220,21cyclictest12475-21apt-get11:31:310
1372899220,21cyclictest0-21swapper/012:36:310
1372899220,1cyclictest2144-21apt-get12:16:330
1372899220,1cyclictest10801-21apt-get10:21:320
13739992120,1cyclictest20873-21apt-get10:41:323
13739992120,1cyclictest12841-21perf10:25:003
13739992120,1cyclictest0-21swapper/310:15:013
1373999210,21cyclictest22817-21apt-get09:41:353
1373999210,21cyclictest0-21swapper/309:36:303
1373999210,20cyclictest7927-21apt-get09:11:333
1373999210,0cyclictest0-21swapper/308:36:313
13734992121,0cyclictest0-21swapper/210:56:312
13734992121,0cyclictest0-21swapper/208:31:322
13734992119,1cyclictest0-21swapper/210:35:012
13734992119,1cyclictest0-21swapper/209:45:012
1373499210,20cyclictest9755-21apt-get12:31:352
1373499210,20cyclictest0-21swapper/209:56:352
1373499210,20cyclictest0-21swapper/208:41:312
1373099213,1cyclictest24151-21cron11:55:001
13730992121,0cyclictest8381-21apt-get10:16:321
13730992121,0cyclictest0-21swapper/112:11:321
13730992121,0cyclictest0-21swapper/111:36:331
13730992121,0cyclictest0-21swapper/107:16:311
13730992119,1cyclictest0-21swapper/108:11:301
13730992113,0cyclictest0-21swapper/108:45:511
13730992113,0cyclictest0-21swapper/108:45:511
1373099210,21cyclictest0-21swapper/110:56:311
1373099210,17cyclictest0-21swapper/109:41:341
1373099210,0cyclictest0-21swapper/110:11:281
1373099210,0cyclictest0-21swapper/109:21:321
13728992121,0cyclictest30482-21apt-get11:01:320
13728992121,0cyclictest0-21swapper/009:55:020
13728992120,1cyclictest18001-21apt-get09:31:320
1372899210,20cyclictest26133-21apt-get07:36:310
1372899210,0cyclictest3131-21apt-get09:01:310
1372899210,0cyclictest19756-21apt-get11:46:320
13739992020,0cyclictest0-21swapper/310:56:323
13739992020,0cyclictest0-21swapper/310:01:333
13739992020,0cyclictest0-21swapper/308:11:313
13739992017,2cyclictest14513-21dump-pmu-power11:34:593
1373999200,20cyclictest0-21swapper/312:21:333
1373999200,0cyclictest5529-21apt-get09:06:323
1373999200,0cyclictest0-21swapper/312:31:343
1373999200,0cyclictest0-21swapper/311:46:333
1373999200,0cyclictest0-21swapper/311:01:333
1373999200,0cyclictest0-21swapper/310:46:363
1373999200,0cyclictest0-21swapper/309:46:323
1373999200,0cyclictest0-21swapper/307:36:303
13734992020,0cyclictest0-21swapper/211:31:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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