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2026-06-18 - 05:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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 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.
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 rack2slot7s.osadl.org (updated Thu Jun 18, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
851151997261,7cyclictest3313177-21cups-browsed20:15:312
851151996050,6cyclictest956307-21ls23:00:182
851151996050,6cyclictest956307-21ls23:00:182
851150995845,7cyclictest0-21swapper/121:15:281
851151995630,22cyclictest931491-21fschecks_time22:20:212
851151995528,23cyclictest943299-21idleruntime-cro22:40:012
85115199542,47cyclictest887128-21diskmemload23:15:302
851149995218,28cyclictest888176-21ssh21:10:290
851151995127,6cyclictest420-21avahi-daemon19:35:192
85115199491,21cyclictest994159-21ssh00:00:332
85115199491,21cyclictest994159-21ssh00:00:332
851150994840,4cyclictest0-21swapper/123:40:251
85115099482,37cyclictest959936-21sh23:05:341
85115099482,37cyclictest959936-21sh23:05:341
851151994736,6cyclictest0-21swapper/221:00:282
85115199472,25cyclictest990982-21ssh23:55:292
851150994740,3cyclictest0-21swapper/100:15:281
851151994537,5cyclictest904016-21sh21:35:332
851151994534,4cyclictest0-21swapper/221:20:282
851150994537,5cyclictest918442-21munin-run22:00:011
85115199442,20cyclictest887128-21diskmemload22:15:302
85114999433,34cyclictest665-21snmpd20:15:270
85115199429,8cyclictest171rcu_preempt23:35:262
851151994230,8cyclictest946610-21latency_hist22:45:032
851151994229,6cyclictest1003-21mta-sts-daemon20:20:292
851150994234,5cyclictest913846-21unixbench_singl21:50:381
851149994223,16cyclictest854188-21latency_hist19:20:010
85115199413,14cyclictest1005508-21munin-run00:20:012
85115199404,27cyclictest1015883-21ssh00:35:262
851151994034,3cyclictest0-21swapper/220:15:022
851151994032,5cyclictest925284-21fschecks_count22:10:242
851151994032,5cyclictest918456-21plymouth22:00:012
851151994030,6cyclictest876645-21systemd-run20:35:022
85115199402,28cyclictest665-21snmpd20:35:312
851150994032,5cyclictest943281-21ls22:40:011
851149994030,6cyclictest151ktimers/020:20:290
851151993925,11cyclictest912983-21kernelversion21:50:212
851150993930,6cyclictest870640-21true20:15:011
851149993929,7cyclictest1015839-21ssh00:35:240
851149993929,6cyclictest151ktimers/021:55:330
85115199383,26cyclictest984743-21ssh23:45:262
85115199383,26cyclictest1012745-21ssh00:30:262
851151993830,5cyclictest909271-21latency_hist21:45:032
851151993830,5cyclictest866119-21munin-plugin-st20:00:012
851151993827,8cyclictest886868-21timerandwakeup21:05:382
851151993827,6cyclictest0-21swapper/200:20:152
851150993828,4cyclictest0-21swapper/100:30:291
851150993826,9cyclictest997728-21timerwakeupswit00:05:421
851150993826,9cyclictest997728-21timerwakeupswit00:05:421
851150993821,3cyclictest171rcu_preempt23:38:581
85114999382,31cyclictest941164-21ssh22:35:260
85115199374,25cyclictest987936-21rm23:50:312
85115199374,25cyclictest891242-21ssh21:15:272
851151993729,5cyclictest884123-21readlink21:00:012
851151993727,4cyclictest0-21swapper/223:08:112
851151993727,4cyclictest0-21swapper/223:08:112
851151993726,7cyclictest3313177-21cups-browsed23:32:562
851151993724,10cyclictest1003-21mta-sts-daemon20:50:272
851150993730,5cyclictest0-21swapper/123:20:001
851149993729,5cyclictest861662-21systemd-run19:45:020
85114999372,29cyclictest1003512-21ssh00:15:320
851149993717,14cyclictest12650irq/32-eth021:15:290
851151993627,4cyclictest0-21swapper/223:30:012
85115099363,25cyclictest953683-21sh22:55:281
85115099363,25cyclictest953683-21sh22:55:281
851150993631,2cyclictest0-21swapper/121:00:011
851150993627,7cyclictest694-21cron20:00:011
851149993627,7cyclictest938011-21ssh22:30:250
851149993626,8cyclictest1-21systemd00:23:350
851149993623,5cyclictest3313177-21cups-browsed21:24:030
85115199355,20cyclictest1000400-21ssh00:10:312
85115199355,20cyclictest1000400-21ssh00:10:312
85115199354,20cyclictest953673-21ssh22:55:282
85115199354,20cyclictest953673-21ssh22:55:282
851151993527,5cyclictest1009260-21fschecks_time00:25:202
851151993526,5cyclictest1002-21mta-sts-daemon22:47:172
851150993529,3cyclictest0-21swapper/123:45:391
851150993527,5cyclictest968812-21fschecks_time23:20:211
851150993527,5cyclictest885635-21cut21:05:011
85114999357,25cyclictest151ktimers/022:20:300
85114999354,27cyclictest12650irq/32-eth023:45:300
85114999354,19cyclictest14-21ksoftirqd/022:03:210
851149993527,5cyclictest996513-21/usr/sbin/munin00:05:250
851149993527,5cyclictest996513-21/usr/sbin/munin00:05:250
851151993424,6cyclictest485-21in:imuxsock19:35:012
851150993429,2cyclictest0-21swapper/119:20:001
851150993428,3cyclictest0-21swapper/100:00:021
851150993427,4cyclictest909471-21aten_r2power_en21:45:151
851150993424,8cyclictest903867-21sh21:35:291
85115099342,24cyclictest1015988-21ssh00:35:311
851150993421,3cyclictest171rcu_preempt22:14:211
851149993427,5cyclictest3313154-21cupsd23:10:120
851149993427,5cyclictest3313154-21cupsd23:10:120
851149993427,4cyclictest958863-21cron23:05:000
851149993427,4cyclictest958863-21cron23:05:000
851149993426,6cyclictest909122-21cut21:45:020
851149993420,6cyclictest945132-21sh22:41:110
851151993326,4cyclictest1000-21mta-sts-daemon19:25:262
851151993325,6cyclictest879648-21kworker/u8:11-xprtiod21:30:242
851151993324,6cyclictest3313177-21cups-browsed19:50:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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