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2026-07-07 - 10:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 rack7slot7s.osadl.org (updated Tue Jul 07, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1471829483,6sleep00-21swapper/019:06:050
1490829278,10sleep30-21swapper/319:08:343
1481929274,13sleep10-21swapper/119:07:231
1477128977,8sleep20-21swapper/219:06:482
1510899300,15cyclictest0-21swapper/223:15:442
1510499300,1cyclictest0-21swapper/122:25:271
1510499280,3cyclictest29596-21ssh22:40:211
1510499271,25cyclictest5940-21diskmemload23:52:541
1510499270,3cyclictest18086-21cron22:15:001
1510499261,4cyclictest0-21swapper/123:45:151
15108992524,1cyclictest0-21swapper/222:47:172
1510499259,3cyclictest38150irq/131-snd_hda00:05:201
1510499252,2cyclictest17405-21apache_processe21:55:131
1510499252,2cyclictest17405-21apache_processe21:55:131
1510499251,21cyclictest29195-21grep19:40:191
1510499241,4cyclictest0-21swapper/100:15:201
1509899245,3cyclictest225-21systemd-journal22:00:420
1510499233,19cyclictest1678-21proc_pri19:50:211
1510499232,2cyclictest5940-21diskmemload22:21:381
1510499231,3cyclictest7900-21ssh23:25:201
1510499230,18cyclictest0-21swapper/121:45:131
1510499223,15cyclictest38150irq/131-snd_hda19:45:111
15104992222,0cyclictest0-21swapper/123:04:361
1510499221,20cyclictest0-21swapper/121:15:151
1510499220,2cyclictest5940-21diskmemload22:35:251
1510499220,1cyclictest0-21swapper/119:35:131
1510899210,21cyclictest0-21swapper/200:39:102
1510899210,13cyclictest0-21swapper/200:20:482
1510499212,1cyclictest9204-21ntp_states21:30:231
1510499212,1cyclictest5940-21diskmemload00:37:091
1510499211,5cyclictest5940-21diskmemload23:10:201
1510499211,4cyclictest5940-21diskmemload23:40:051
1510499210,4cyclictest29625-21sh22:01:511
1510499210,20cyclictest0-21swapper/123:30:151
1510499210,20cyclictest0-21swapper/123:30:151
1510499210,1cyclictest0-21swapper/100:27:061
1509899217,8cyclictest13954-21-browsed00:07:070
15098992120,1cyclictest0-21swapper/023:51:290
1510899201,18cyclictest21349-21ps00:30:242
1510499207,5cyclictest11062-21sh23:08:061
1510499203,16cyclictest0-21swapper/123:55:231
1510499202,4cyclictest24146-21/usr/sbin/munin21:20:171
1510499201,5cyclictest20704-21runrttasks00:30:191
1510499201,4cyclictest0-21swapper/119:20:281
1510499200,20cyclictest0-21swapper/122:56:561
1511299190,19cyclictest0-21swapper/323:28:453
1511299190,17cyclictest0-21swapper/300:29:033
1510899190,12cyclictest0-21swapper/221:37:262
15104991919,0cyclictest0-21swapper/100:13:281
15104991915,2cyclictest0-21swapper/121:15:001
1510499190,2cyclictest24993-21unixbench_multi19:30:261
1510499190,16cyclictest0-21swapper/100:24:151
1510499190,14cyclictest24837-21ssh22:18:451
1509899190,4cyclictest0-21swapper/023:33:580
1509899190,4cyclictest0-21swapper/023:33:580
1510499186,6cyclictest19195-21ssh21:36:131
1510499181,5cyclictest14475-21cron20:20:011
1510499180,2cyclictest5940-21diskmemload23:35:151
1510499180,1cyclictest0-21swapper/123:17:071
1510499180,1cyclictest0-21swapper/120:25:191
303032170,0sleep30-21swapper/322:02:233
15112991713,3cyclictest11061-21ls22:10:153
1511299171,12cyclictest0-21swapper/323:05:123
1511299170,17cyclictest12482-21kworker/3:119:23:353
1511299170,15cyclictest0-21swapper/321:54:043
1510899179,2cyclictest16067-21grep19:15:122
15108991717,0cyclictest0-21swapper/200:05:012
15108991716,1cyclictest0-21swapper/223:51:572
15108991710,2cyclictest30629-21grep23:00:182
1510899170,13cyclictest0-21swapper/223:45:572
1510499177,5cyclictest29334-21ssh21:42:331
1510499173,1cyclictest5940-21diskmemload22:53:001
1510499170,9cyclictest0-21swapper/100:01:211
1510499170,2cyclictest19355-21latency_hist22:35:001
1509899175,6cyclictest14495-21munin-run20:20:010
1509899170,1cyclictest0-21swapper/000:38:050
1511299160,3cyclictest225-21systemd-journal00:33:413
1510499169,6cyclictest25965-21sed20:40:261
1510499161,1cyclictest5940-21diskmemload23:23:291
1509899160,2cyclictest0-21swapper/023:40:530
1509899160,1cyclictest0-21swapper/023:49:510
1511299156,7cyclictest0-21swapper/321:15:123
15112991514,1cyclictest39-21ksoftirqd/322:54:163
1510899159,5cyclictest4079-21wc22:25:212
1510899156,8cyclictest716-21munin-node21:50:512
1510899150,4cyclictest0-21swapper/221:20:162
1510899150,2cyclictest0-21swapper/222:59:382
1510499159,5cyclictest5391-21wc21:05:261
1510499158,6cyclictest9866-21cut21:50:161
1510499158,6cyclictest5302-21apache222:06:571
1510499155,6cyclictest225-21systemd-journal20:24:551
1510499150,3cyclictest1276-21unixbench_multi21:25:251
1510499150,2cyclictest0-21swapper/119:15:151
1510499150,14cyclictest20916-21chrt19:25:101
1509899155,5cyclictest14994-21ssh23:30:000
15098991512,2cyclictest28995-21cut22:40:160
1509899150,9cyclictest30386-21grep23:20:010
1509899150,3cyclictest0-21swapper/021:13:150
15112991410,3cyclictest26400-21turbostat.cron20:44:593
15112991410,3cyclictest21390-21ssh22:16:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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