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2026-05-10 - 15:29

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 10, 2026 12:43:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3281800995242,6cyclictest3435208-21basename11:40:002
3281800995040,6cyclictest3428651-21ntpq11:30:572
3281798995042,5cyclictest3383646-21systemd-run10:35:010
3281798994841,4cyclictest3372476-21systemd-run10:20:010
3281798994837,8cyclictest3345903-21munin-run09:45:000
3281800994636,6cyclictest3468939-21head12:21:012
3281798994639,4cyclictest3435217-21systemctl11:40:000
3281800994537,3cyclictest0-21swapper/211:50:012
3281800994435,6cyclictest421-21dbus-daemon09:05:012
3281800994435,6cyclictest421-21dbus-daemon09:05:012
3281798994335,5cyclictest3401188-21unixbench-2d10:56:050
3281798994332,8cyclictest3341930-21munin-run09:40:010
3281798994332,8cyclictest3341930-21munin-run09:40:010
3281800994233,6cyclictest421-21dbus-daemon09:55:012
3281799994233,6cyclictest421-21dbus-daemon11:15:011
328179899425,31cyclictest3323259-21ssh09:15:550
3281798994236,3cyclictest0-21swapper/009:25:010
3281798994233,6cyclictest3284822-21systemd-run07:20:020
3281798994232,7cyclictest3399328-21munin-plugin-st10:55:010
3281798994231,7cyclictest3395423-21systemd-run10:50:010
3281798994227,12cyclictest3377844-21grep10:26:020
3281798994214,22cyclictest3428616-21ssh11:30:540
3281800994133,5cyclictest3333995-21idleruntime-cro09:30:012
3281800994131,6cyclictest1-21systemd09:20:012
3281799994133,5cyclictest3395423-21systemd-run10:50:011
3281799994133,5cyclictest3372440-21grep10:20:001
3281799994123,12cyclictest271ktimers/108:40:521
3281799994123,12cyclictest271ktimers/108:40:521
328179899414,34cyclictest3331279-21ssh09:25:510
3281798994126,12cyclictest3448366-21ntp_kernel_err11:55:490
3281800994033,4cyclictest3407279-21cron11:05:012
3281800994033,4cyclictest3407279-21cron11:05:012
3281800994032,5cyclictest3341932-21munin-plugin-st09:40:012
3281800994032,5cyclictest3341932-21munin-plugin-st09:40:012
3281800994030,7cyclictest3361592-21cron10:05:012
3281799994031,4cyclictest3292261-21kworker/u8:2-rpciod07:59:571
328179899402,7cyclictest14-21ksoftirqd/008:50:530
328179899402,26cyclictest3412721-21ssh11:10:560
3281800993932,4cyclictest3399365-21latency_hist10:55:022
3281800993928,7cyclictest3474977-21cron12:30:012
328179999394,9cyclictest171rcu_preempt09:00:511
328179999394,9cyclictest171rcu_preempt09:00:511
3281799993931,5cyclictest3467004-21munin-plugin-st12:20:001
3281798993929,7cyclictest3311797-21systemd08:50:010
3281798993912,21cyclictest3351106-21ssh09:50:470
3281800993830,4cyclictest0-21swapper/210:40:532
3281800993827,8cyclictest3346921-21kernelversion09:45:452
3281799993830,5cyclictest3400204-21fschecks_count10:55:461
3281799993828,6cyclictest0-21swapper/109:50:471
3281799993813,19cyclictest1051-21mta-sts-daemon09:05:521
328179899389,22cyclictest3416667-21ssh11:15:550
3281798993831,4cyclictest3447143-21munin-plugin-st11:55:010
328179899381,28cyclictest2469968-21cups-browsed11:00:520
328179899381,28cyclictest2469968-21cups-browsed11:00:520
3281800993730,3cyclictest0-21swapper/212:35:532
3281800993729,5cyclictest3372431-21ssh10:20:002
3281800993728,5cyclictest3295288-21kworker/u8:907:55:012
3281798993726,8cyclictest151ktimers/008:55:500
328179899372,30cyclictest3420517-21ssh11:20:480
3281798993722,4cyclictest0-21swapper/012:15:390
328179899371,28cyclictest3362845-21ssh10:05:500
3281800993629,4cyclictest3345924-21kworker/u8:15-xprtiod10:35:012
3281800993628,5cyclictest3357769-21awk10:00:012
3281800993627,6cyclictest3421133-21unixbench_multi11:21:002
3281799993630,3cyclictest0-21swapper/111:25:441
3281799993630,3cyclictest0-21swapper/110:45:011
3281799993628,5cyclictest3482958-21idleruntime-cro12:40:011
3281799993628,5cyclictest3478979-21/usr/sbin/munin12:35:011
3281799993628,5cyclictest3341968-21systemd-run09:40:011
3281799993628,5cyclictest3341968-21systemd-run09:40:011
3281799993627,7cyclictest3347648-21timerandwakeup09:46:011
328179899363,29cyclictest3472320-21ssh12:25:510
3281798993627,6cyclictest0-21swapper/010:21:030
3281798993627,3cyclictest171rcu_preempt10:10:570
3281798993623,9cyclictest3456423-21rm12:05:540
3281798993618,11cyclictest12350irq/32-eth009:30:520
3281800993528,4cyclictest3321835-21munin-plugin-st09:15:002
3281800993525,7cyclictest3366596-21sshd10:10:542
3281800993524,7cyclictest2469968-21cups-browsed12:05:592
3281799993528,4cyclictest0-21swapper/108:20:011
3281799993526,7cyclictest3448510-21sh11:55:541
3281799993526,6cyclictest420-21avahi-daemon11:43:261
3281799993525,7cyclictest3396926-21mailstats10:51:001
328179999352,24cyclictest3440566-21ssh11:45:531
3281798993528,4cyclictest3349894-21systemd-run09:50:010
3281798993528,4cyclictest12450irq/33-eth012:20:530
3281798993523,9cyclictest3424792-21mailstats11:25:580
3281798993522,9cyclictest3317777-21diskmemload12:10:500
3281798993522,9cyclictest3317777-21diskmemload12:10:500
3281800993428,3cyclictest0-21swapper/211:40:522
3281800993422,5cyclictest1056-21mta-sts-daemon08:35:432
3281800993422,5cyclictest1056-21mta-sts-daemon08:35:432
3281799993421,10cyclictest3359338-21mailstats10:01:001
3281799993411,9cyclictest171rcu_preempt09:14:251
328179899345,15cyclictest3480250-21ssh12:35:500
3281798993427,3cyclictest0-21swapper/011:05:450
3281798993424,7cyclictest3387605-21latency_hist10:40:020
328179899342,20cyclictest3355224-21ntpq09:55:540
3281798993412,17cyclictest191rcuc/008:05:510
328180099336,7cyclictest171rcu_preempt08:50:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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