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2026-05-17 - 19:02

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 Sun May 17, 2026 12:43:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
700704996554,5cyclictest0-21swapper/112:15:591
70070399602,48cyclictest874903-21ssh12:00:560
70070399602,48cyclictest874903-21ssh12:00:560
700704995837,17cyclictest893708-21ssh12:25:021
700703995530,17cyclictest151ktimers/012:35:520
700704995330,20cyclictest750554-21timerwakeupswit09:26:041
700703995245,4cyclictest744746-21basename09:20:010
700704995040,6cyclictest757928-21missed_timers09:35:511
700704995040,6cyclictest757928-21missed_timers09:35:511
700705994941,5cyclictest776956-21munin-run10:00:012
700704994939,6cyclictest4037003-21cups-browsed10:10:151
700705994842,3cyclictest0-21swapper/211:20:012
700703994840,5cyclictest736731-21munin-plugin-st09:10:000
700705994737,6cyclictest897678-21ssh12:30:012
700705994734,9cyclictest420-21avahi-daemon12:18:342
70070499473,16cyclictest818699-21ssh10:50:581
700703994735,5cyclictest151ktimers/007:15:570
700703994716,27cyclictest762112-21ssh09:40:540
700705994635,8cyclictest877580-21systemd-run12:05:012
700705994635,8cyclictest877580-21systemd-run12:05:012
700704994637,4cyclictest0-21swapper/112:36:011
700703994639,4cyclictest721716-21kworker/u8:9-xprtiod09:10:500
700705994537,5cyclictest829367-21ssh11:05:012
700705994537,5cyclictest829367-21ssh11:05:012
700704994527,15cyclictest863444-21sh11:46:081
700703994534,8cyclictest790314-21cat10:15:560
700703994534,8cyclictest790314-21cat10:15:560
700705994435,5cyclictest0-21swapper/212:15:012
700705994432,7cyclictest814422-21needreboot10:45:512
700704994436,5cyclictest899222-21mailstats12:31:061
700704994427,13cyclictest727710-21cron08:40:011
70070499441,12cyclictest716668-21ntpq08:01:011
700703994428,4cyclictest833399-21kworker/u8:12+rpciod11:50:010
700705994335,5cyclictest1056-21mta-sts-daemon11:35:542
70070499432,6cyclictest838874-21ntpq11:16:001
700704994317,23cyclictest765809-21ls09:45:471
700703994334,6cyclictest420-21avahi-daemon11:20:560
700703994330,6cyclictest857519-21ssh11:40:010
700703994327,13cyclictest721734-21latency_hist08:20:020
700705994234,5cyclictest845428-21sh11:25:012
700705994234,5cyclictest0-21swapper/209:00:012
700705994232,6cyclictest439-21systemd-logind11:30:012
70070499428,31cyclictest799254-21ssh10:26:231
700704994236,3cyclictest0-21swapper/110:40:011
70070499422,5cyclictest701572-21ntpq07:10:551
700704994224,15cyclictest850733-21netstat11:30:531
700704994216,22cyclictest0-21swapper/111:40:591
70070499421,15cyclictest712090-21ntpq07:45:551
70070499421,11cyclictest774291-21ntpq09:55:561
700703994231,8cyclictest776956-21munin-run10:00:010
700705994133,5cyclictest727764-21systemd-run08:40:012
70070499419,29cyclictest825559-21ssh11:00:051
70070499419,29cyclictest825559-21ssh11:00:051
70070499412,7cyclictest734624-21ntpq09:00:561
70070499412,6cyclictest731601-21ntpq08:50:521
70070499412,5cyclictest722571-21ntpq08:20:531
70070499411,9cyclictest719181-21diskstats08:10:471
700704994118,20cyclictest874219-21aten_r2power_fr12:00:441
700704994118,20cyclictest874219-21aten_r2power_fr12:00:441
70070499411,5cyclictest822714-21ntpq10:56:001
70070499411,5cyclictest709080-21ntpq07:35:551
70070499411,12cyclictest707185-21diskstats07:30:451
70070499411,10cyclictest780991-21ssh10:04:591
70070499411,10cyclictest710638-21ntpq07:40:581
70070499411,10cyclictest710638-21ntpq07:40:581
700703994134,4cyclictest420-21avahi-daemon12:20:010
700703994132,7cyclictest754758-21sh09:31:070
700703994132,6cyclictest421-21dbus-daemon09:55:010
700703994130,5cyclictest829337-21cut11:05:000
700703994130,5cyclictest829337-21cut11:05:000
70070499408,29cyclictest747801-21ssh09:23:111
70070499407,30cyclictest815974-21ssh10:47:351
70070499402,5cyclictest715062-21ntpq07:55:541
70070499402,4cyclictest728717-21ntpq08:41:011
70070499401,9cyclictest736182-21ntpq09:05:591
70070499401,9cyclictest704594-21ntpq07:20:531
70070499401,13cyclictest846963-21ssh11:26:021
70070499401,11cyclictest881177-21ssh12:09:111
70070499401,11cyclictest833261-21ssh11:09:491
70070499401,11cyclictest762879-21ssh09:41:131
70070499401,10cyclictest896923-21ssh12:28:371
70070499401,10cyclictest884763-21ssh12:13:211
70070499401,10cyclictest869370-21ssh11:54:471
70070499401,10cyclictest833815-21ssh11:10:271
70070499401,10cyclictest796503-21ssh10:23:521
70070499401,10cyclictest796503-21ssh10:23:521
70070499401,10cyclictest744231-21ssh09:19:031
70070499400,10cyclictest755190-21ssh09:31:571
70070399403,32cyclictest814489-21sh10:45:530
700703994028,9cyclictest893758-21latency_hist12:25:020
700703994025,11cyclictest0-21swapper/011:56:010
70070399402,28cyclictest838781-21ssh11:15:560
700703994022,14cyclictest881595-21cron12:10:000
700705993931,5cyclictest793089-21sendmail10:20:012
700705993931,5cyclictest793089-21sendmail10:20:012
700705993927,4cyclictest858292-21aten_r2power_vo11:40:452
70070499399,27cyclictest718321-21/usr/sbin/munin08:06:051
700704993932,4cyclictest703689-21grep07:20:011
70070499391,9cyclictest856973-21ssh11:38:591
70070499391,9cyclictest769217-21ssh09:50:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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