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2026-04-09 - 05:25

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 Apr 09, 2026 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3372880996327,29cyclictest3417910-21ssh21:20:360
3372882995645,6cyclictest0-21swapper/221:30:342
3372882995645,6cyclictest0-21swapper/221:30:342
337288299504,9cyclictest171rcu_preempt22:40:342
3372880994939,4cyclictest0-21swapper/019:35:380
337288299482,37cyclictest3503142-21ssh23:05:352
337288299482,37cyclictest3503142-21ssh23:05:352
3372882994735,8cyclictest420-21avahi-daemon21:10:022
337288099472,35cyclictest3429835-21ssh21:35:290
3372882994638,5cyclictest421-21dbus-daemon21:30:022
3372882994638,5cyclictest421-21dbus-daemon21:30:022
3372882994637,6cyclictest421-21dbus-daemon19:10:012
337288299463,34cyclictest3511233-21ssh23:15:332
3372880994619,21cyclictest3442195-21ssh21:50:380
3372882994530,10cyclictest421-21dbus-daemon21:35:312
3372881994536,6cyclictest3536063-21threads23:45:461
3372881994518,14cyclictest3408864-21diskmemload00:01:171
3372881994436,5cyclictest3514125-21systemctl23:20:001
3372881994432,9cyclictest3466944-21timerwakeupswit22:20:431
3372882994332,7cyclictest3416724-21systemd21:20:022
3372882994231,7cyclictest421-21dbus-daemon22:17:532
3372882994231,7cyclictest3546645-21cups-browsed00:08:502
3372882994229,9cyclictest3440948-21ssh21:50:012
3372880994230,9cyclictest0-21swapper/023:40:010
337288299415,26cyclictest3531640-21ssh23:40:342
337288299413,30cyclictest3450299-21ssh22:00:362
3372882994131,5cyclictest0-21swapper/200:00:262
3372881994133,5cyclictest3518199-21cron23:25:001
3372881994133,4cyclictest0-21swapper/122:05:311
337288199413,27cyclictest3551731-21ssh00:05:331
3372880994125,13cyclictest3465350-21latency_hist22:20:020
3372882994032,5cyclictest3542611-21systemd23:55:022
3372882994032,5cyclictest3497869-21systemd-run23:00:012
337288299401,30cyclictest3442107-21ssh21:50:342
337288099401,33cyclictest3543863-21ssh23:55:380
3372882993933,3cyclictest0-21swapper/220:40:002
3372882993933,3cyclictest0-21swapper/220:40:002
3372882993930,6cyclictest261-21systemd-journal19:15:012
3372882993928,7cyclictest3408864-21diskmemload23:00:242
3372881993932,3cyclictest0-21swapper/123:35:351
3372881993928,8cyclictest3495638-21unixbench_singl22:55:531
337288199392,30cyclictest3462350-21sshd22:15:311
337288099393,27cyclictest3478605-21ssh22:35:320
3372880993931,6cyclictest3477487-21cron22:35:000
3372880993930,7cyclictest439-21systemd-logind23:50:020
337288299383,27cyclictest3559710-21ssh00:15:302
3372882993828,5cyclictest0-21swapper/200:30:372
3372881993832,3cyclictest0-21swapper/122:50:331
3372881993830,3cyclictest0-21swapper/100:20:031
3372880993830,5cyclictest3572433-21unixbench_singl00:30:460
3372882993723,7cyclictest0-21swapper/223:55:372
337288199378,23cyclictest3523458-21ssh23:30:341
3372881993731,3cyclictest0-21swapper/100:00:011
3372881993729,4cyclictest3502643-21fschecks_count23:05:251
3372881993729,4cyclictest3502643-21fschecks_count23:05:251
3372881993729,4cyclictest0-21swapper/122:00:011
3372881993728,6cyclictest420-21avahi-daemon21:15:431
3372881993728,4cyclictest0-21swapper/121:25:321
3372881993728,4cyclictest0-21swapper/121:25:321
3372881993726,7cyclictest3458087-21latency22:10:291
3372881993724,10cyclictest3470302-21latency22:25:301
3372881993724,10cyclictest3470302-21latency22:25:301
3372880993729,6cyclictest3380371-21/usr/sbin/munin19:35:010
337288299363,27cyclictest3434069-21ssh21:40:362
3372882993628,5cyclictest3566684-21latency_hist00:25:022
3372882993626,6cyclictest3404373-21systemd-run20:55:012
3372882993624,7cyclictest1431064-21cups-browsed22:54:242
337288299362,28cyclictest3446290-21ssh21:55:412
337288299362,27cyclictest3466421-21ssh22:20:312
337288199367,11cyclictest3409931-21ntpq21:10:301
3372881993630,3cyclictest0-21swapper/121:10:011
3372881993628,5cyclictest3434628-21unixbench_singl21:40:441
3372881993628,4cyclictest0-21swapper/122:35:341
3372881993628,3cyclictest0-21swapper/121:20:371
3372881993617,14cyclictest548-21gdbus00:25:351
3372881993610,11cyclictest1431064-21cups-browsed22:31:171
337288099363,22cyclictest3486835-21ssh22:45:380
3372880993631,2cyclictest0-21swapper/023:25:270
3372880993628,5cyclictest421-21dbus-daemon00:03:180
3372882993529,3cyclictest0-21swapper/220:10:012
3372882993529,3cyclictest0-21swapper/200:40:002
3372882993526,6cyclictest421-21dbus-daemon22:10:012
3372882993525,5cyclictest0-21swapper/222:30:412
3372881993528,4cyclictest0-21swapper/122:00:451
3372881993527,5cyclictest421-21dbus-daemon21:40:011
3372881993527,5cyclictest3440936-21ssh21:50:011
3372881993527,5cyclictest3398360-21idleruntime-cro20:35:001
337288199352,26cyclictest3563802-21ssh00:20:331
3372881993521,8cyclictest3390298-21ntpq20:05:351
3372880993528,4cyclictest3399900-21kworker/u8:0-rpciod21:26:320
3372880993528,4cyclictest3399900-21kworker/u8:0-rpciod21:26:320
3372880993526,6cyclictest3546645-21cups-browsed00:23:330
3372880993524,5cyclictest3578653-21idleruntime-cro00:40:000
337288099351,30cyclictest3511311-21ssh23:15:360
3372882993426,5cyclictest3556375-21unixbench_singl00:10:442
3372882993426,5cyclictest3471203-21unixbench_singl22:25:472
3372882993426,5cyclictest3471203-21unixbench_singl22:25:472
3372882993426,4cyclictest3514150-21kworker/u8:1-xprtiod23:25:452
3372882993426,4cyclictest1056-21mta-sts-daemon23:10:392
3372882993426,4cyclictest1056-21mta-sts-daemon23:10:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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