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2026-07-20 - 16:35

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 Jul 20, 2026 12:43:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3394685996037,17cyclictest3481963-40mandb10:34:320
3394687995846,9cyclictest2602816-21cups-browsed11:30:532
3394686995546,6cyclictest1003-21mta-sts-daemon10:34:231
3394687995242,6cyclictest2602816-21cups-browsed10:50:532
3394686995139,8cyclictest0-21swapper/110:35:421
3394687994940,6cyclictest3429200-21systemd-run09:05:022
3394685994921,17cyclictest151ktimers/008:20:440
3394687994842,2cyclictest0-21swapper/210:34:322
339468699484,36cyclictest3549695-21ssh12:25:441
3394686994838,5cyclictest3436741-21munin-run09:20:011
3394685994825,19cyclictest3461002-21munin-run10:00:010
3394686994737,6cyclictest3442859-21latency_hist09:30:021
3394686994737,6cyclictest3442859-21latency_hist09:30:021
3394687994637,5cyclictest421-21dbus-daemon12:30:022
3394687994537,5cyclictest3547204-21unixbench-2d12:20:552
3394687994536,5cyclictest3533478-21latency_hist12:00:012
3394685994529,13cyclictest3423198-21systemd-run08:45:010
3394685994529,13cyclictest3423198-21systemd-run08:45:010
3394687994438,3cyclictest0-21swapper/211:05:482
3394687994434,6cyclictest2602816-21cups-browsed12:33:192
3394685994435,5cyclictest0-21swapper/011:15:490
3394687994335,3cyclictest0-21swapper/209:05:482
3394687994334,5cyclictest3406741-21latency_hist07:50:022
3394686994335,5cyclictest3422213-21fschecks_time08:40:371
3394686994335,5cyclictest3422213-21fschecks_time08:40:371
3394686994334,5cyclictest3460997-21latency_hist10:00:011
3394686994334,5cyclictest3396691-21fschecks_count07:15:391
3394687994228,9cyclictest420-21avahi-daemon10:39:182
339468799413,34cyclictest3528600-21ssh11:50:462
3394687994127,10cyclictest3470075-21cron10:15:012
3394686994132,5cyclictest0-21swapper/109:20:541
339468699411,37cyclictest3453066-21ssh09:45:461
3394685994134,4cyclictest3397659-21cron07:20:010
3394685994133,6cyclictest421-21dbus-daemon11:50:020
3394685994130,8cyclictest3436738-21sh09:20:010
3394687994031,5cyclictest3486276-21ssh10:40:472
3394686994032,5cyclictest3548640-21systemd-run12:25:021
3394686994031,5cyclictest3552573-21sort12:30:411
3394685994033,4cyclictest3399207-21systemd-run07:25:010
3394687993932,3cyclictest0-21swapper/209:15:462
3394687993929,7cyclictest3451925-21sh09:45:012
3394687993929,6cyclictest1003-21mta-sts-daemon12:35:202
3394687993928,7cyclictest0-21swapper/209:25:382
3394687993928,7cyclictest0-21swapper/209:25:382
3394686993933,3cyclictest0-21swapper/110:40:571
3394686993931,5cyclictest3456214-21/usr/sbin/munin09:50:491
3394685993932,5cyclictest485-21in:imuxsock11:00:010
339468799384,25cyclictest3474194-21ssh10:20:432
3394687993831,4cyclictest3445866-21systemd09:35:012
3394687993831,4cyclictest3445866-21systemd09:35:012
3394687993830,5cyclictest3402193-21systemd-run07:35:022
3394687993830,4cyclictest0-21swapper/210:45:442
3394687993829,5cyclictest3507009-21fschecks_count11:15:392
3394687993829,4cyclictest0-21swapper/211:11:032
3394687993829,4cyclictest0-21swapper/211:11:032
3394687993828,5cyclictest0-21swapper/211:20:462
3394687993826,8cyclictest420-21avahi-daemon12:03:252
3394686993832,3cyclictest0-21swapper/112:40:011
3394686993830,5cyclictest421-21dbus-daemon10:05:561
3394686993828,4cyclictest0-21swapper/108:50:421
3394685993833,3cyclictest3448875-21munin-run09:40:000
3394685993829,7cyclictest3557660-21munin-run12:40:010
339468799375,20cyclictest428-21mta-sts-daemon07:10:422
3394687993728,6cyclictest3399189-21cut07:25:012
3394687993725,9cyclictest3419486-21needreboot08:30:412
3394686993729,5cyclictest3429200-21systemd-run09:05:021
3394685993730,5cyclictest3418697-21systemd-run08:30:010
3394685993729,5cyclictest485-21in:imuxsock11:05:010
3394685993729,5cyclictest3485680-21aten_r2power_en10:40:350
3394685993728,6cyclictest12650irq/32-eth010:00:480
3394685993727,7cyclictest485-21in:imuxsock10:10:010
3394685993727,7cyclictest3534961-21switchtime12:00:550
3394685993725,9cyclictest3445953-21grep09:35:020
3394685993725,9cyclictest3445953-21grep09:35:020
339468599371,30cyclictest3546678-21sh12:20:420
339468799364,22cyclictest3462074-21ssh10:00:422
3394687993630,3cyclictest0-21swapper/209:50:422
3394687993629,3cyclictest0-21swapper/209:15:012
3394687993628,5cyclictest3521365-21munin-run11:40:012
3394687993628,4cyclictest0-21swapper/209:46:292
3394687993623,5cyclictest1001-21mta-sts-daemon08:10:362
3394686993628,5cyclictest3524396-21cron11:45:011
3394685993631,2cyclictest0-21swapper/010:20:010
3394687993528,3cyclictest0-21swapper/212:10:562
3394687993524,7cyclictest2602816-21cups-browsed10:25:112
339468799352,27cyclictest3495302-21ssh10:55:442
339468799352,24cyclictest3498457-21ssh11:00:482
339468699353,24cyclictest3471220-21ssh10:15:431
3394686993529,3cyclictest0-21swapper/112:05:501
3394686993528,4cyclictest3417184-21grep08:25:011
3394686993527,5cyclictest3517031-21unixbench_multi11:31:051
3394686993526,5cyclictest3501389-21ntp_kernel_pll_11:05:451
3394685993530,3cyclictest3394684-21cyclictest08:45:560
3394685993525,8cyclictest3504008-21fschecks_time11:10:410
3394685993525,8cyclictest3504008-21fschecks_time11:10:410
3394685993525,7cyclictest2602816-21cups-browsed09:40:480
339468799345,22cyclictest3543704-21ssh12:15:462
3394687993424,8cyclictest3404958-21timerwakeupswit07:40:542
3394687993422,8cyclictest420-21avahi-daemon08:35:382
3394686993425,6cyclictest1003-21mta-sts-daemon10:29:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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