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2026-09-07 - 13:40

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 Mon Sep 07, 2026 12:42:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
331836599548,7cyclictest171rcu_preempt11:51:091
331836599531,22cyclictest2534398-21cups-browsed09:51:111
3318365995142,5cyclictest3362373-21unixbench_singl09:21:211
3318365995134,14cyclictest3342509-21latency_hist08:30:031
3318366994841,3cyclictest0-21swapper/211:26:032
3318366994841,3cyclictest0-21swapper/211:26:032
3318364994731,13cyclictest420-21avahi-daemon11:06:070
331836499472,37cyclictest3453023-21ssh11:51:060
3318366994639,3cyclictest0-21swapper/211:11:162
3318365994617,3cyclictest0-21swapper/111:01:021
3318366994535,6cyclictest3328921-21systemd-run07:45:012
331836599454,36cyclictest3364972-21ssh09:26:211
3318365994536,6cyclictest3375926-21latency_hist09:45:021
3318365994521,21cyclictest3467571-21/usr/sbin/munin12:16:161
3318365994520,3cyclictest0-21swapper/109:50:011
3318365994517,24cyclictest3416668-21sh10:51:151
3318364994536,3cyclictest0-21swapper/009:26:140
3318364994520,15cyclictest12650irq/32-eth010:36:070
3318364994520,15cyclictest12650irq/32-eth010:36:070
3318366994435,5cyclictest3322936-21systemd-run07:25:022
3318365994433,7cyclictest2534398-21cups-browsed11:16:481
3318365994419,2cyclictest0-21swapper/110:25:001
3318365994419,2cyclictest0-21swapper/110:25:001
3318365994413,5cyclictest2534398-21cups-browsed11:11:151
331836499442,35cyclictest3367939-21diskmemload09:31:120
331836499442,34cyclictest151ktimers/011:31:120
3318364994412,25cyclictest3465359-21ssh12:11:130
3318366994337,3cyclictest0-21swapper/208:06:082
3318365994319,3cyclictest0-21swapper/112:26:101
3318365994318,5cyclictest3354237-21grep09:06:191
3318364994321,10cyclictest151ktimers/012:16:100
3318366994235,4cyclictest3482275-21latency_hist12:40:012
331836599422,10cyclictest3401477-21ssh10:26:131
3318365994217,5cyclictest2534398-21cups-browsed08:15:171
3318365994217,3cyclictest0-21swapper/111:00:011
3318365994216,3cyclictest0-21swapper/110:46:181
3318364994230,8cyclictest3459228-21rm12:01:110
3318366994134,4cyclictest3348395-21idleruntime-cro08:50:012
3318366994131,6cyclictest420-21avahi-daemon11:31:402
3318365994133,5cyclictest3406219-21ls10:35:011
3318366994031,5cyclictest2534398-21cups-browsed11:03:322
3318366994020,9cyclictest3354396-21diskmemload11:16:162
3318365994028,9cyclictest3372841-21latency_hist09:40:021
331836599402,10cyclictest3392411-21ssh10:11:151
3318365994017,4cyclictest3476901-21cpu12:30:581
3318365994017,3cyclictest0-21swapper/109:10:581
3318365994015,3cyclictest0-21swapper/111:06:151
3318364994028,9cyclictest3391565-21/usr/sbin/munin10:11:030
3318364994023,15cyclictest3418392-21munin-plugin-st10:55:000
3318366993934,2cyclictest0-21swapper/210:36:032
3318366993934,2cyclictest0-21swapper/210:36:032
3318366993931,5cyclictest3398919-21grep10:21:202
3318366993931,5cyclictest3398919-21grep10:21:202
3318366993930,6cyclictest1-21systemd11:45:012
3318366993930,5cyclictest3334925-21systemd-run08:05:022
3318366993929,7cyclictest3404150-21sshd10:31:032
3318365993931,5cyclictest3442676-21munin-run11:35:011
3318365993930,6cyclictest1-21systemd11:37:031
3318365993930,4cyclictest0-21swapper/108:11:061
3318365993928,5cyclictest0-21swapper/112:11:091
3318365993917,2cyclictest0-21swapper/109:30:591
331836599391,6cyclictest3395285-21ntpq10:16:071
331836599391,6cyclictest3395285-21ntpq10:16:071
3318365993914,6cyclictest3459183-21sed12:01:091
3318365993913,8cyclictest421-21dbus-daemon11:25:261
3318365993913,8cyclictest421-21dbus-daemon11:25:261
331836599391,15cyclictest3319302-21ntpq07:11:121
3318364993932,4cyclictest3340932-21systemd-run08:25:020
331836699386,23cyclictest428-21mta-sts-daemon07:13:252
3318366993832,3cyclictest0-21swapper/210:16:092
3318366993832,3cyclictest0-21swapper/210:16:092
3318366993830,5cyclictest2534398-21cups-browsed09:44:552
331836599384,16cyclictest3383158-21ntpq09:56:081
3318365993830,5cyclictest3386169-21ssh10:01:081
331836599382,15cyclictest3434813-21ntpq11:21:081
3318365993814,5cyclictest0-21swapper/110:40:031
3318365993814,5cyclictest0-21swapper/110:40:031
331836599381,16cyclictest3407279-21memory10:36:041
331836599381,16cyclictest3407279-21memory10:36:041
3318364993832,4cyclictest3462732-21unixbench-2d12:06:210
3318364993830,5cyclictest421-21dbus-daemon11:40:010
3318364993830,5cyclictest3410123-21fschecks_time10:41:020
3318364993830,5cyclictest3410123-21fschecks_time10:41:020
3318364993821,10cyclictest151ktimers/008:56:060
3318366993731,3cyclictest0-21swapper/210:46:032
3318366993730,4cyclictest1001-21mta-sts-daemon12:16:142
3318366993729,5cyclictest3369725-21latency_hist09:35:012
3318366993728,6cyclictest3379561-21aten2.4-expect09:51:002
3318366993728,6cyclictest2534398-21cups-browsed09:21:132
3318366993728,6cyclictest2534392-21cupsd11:20:502
3318366993727,6cyclictest2534398-21cups-browsed10:54:452
331836699372,25cyclictest3453228-21ssh11:51:142
331836599373,21cyclictest3447012-21ssh11:41:111
3318365993730,3cyclictest0-21swapper/108:40:011
3318365993728,5cyclictest0-21swapper/109:16:051
3318364993730,4cyclictest3331915-21systemd-run07:55:010
3318364993727,6cyclictest3333405-21idleruntime-cro08:00:010
3318366993628,5cyclictest3401961-21unixbench_multi10:26:232
3318366993627,6cyclictest3333395-21idleruntime-cro08:00:012
3318366993627,6cyclictest2534398-21cups-browsed12:24:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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