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2026-04-03 - 08:35

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 Fri Apr 03, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3322409997930,38cyclictest3454967-21rm23:07:490
3322410996452,7cyclictest0-21swapper/122:40:341
3322410996052,5cyclictest3528514-21systemd-run00:40:021
3322410995648,4cyclictest0-21swapper/120:00:011
3322411995340,9cyclictest3512469-21sh00:20:012
332240999521,10cyclictest3404295-21ssh22:05:320
3322411995136,5cyclictest0-21swapper/223:15:352
332241199512,38cyclictest3392087-21ssh21:50:332
332241199502,42cyclictest3424690-21ssh22:30:342
3322411994939,6cyclictest421-21dbus-daemon23:40:012
332240999492,10cyclictest3493516-21ssh23:55:310
332240999492,10cyclictest3493516-21ssh23:55:310
3322411994735,7cyclictest1421253-21cups-browsed21:28:142
332241199464,9cyclictest171rcu_preempt22:40:302
3322411994633,8cyclictest420-21avahi-daemon21:55:132
3322410994639,5cyclictest1054-21mta-sts-daemon20:50:221
3322409994638,4cyclictest3379685-21missed_timers21:35:260
3322409994635,7cyclictest1054-21mta-sts-daemon22:50:210
3322411994536,5cyclictest3403127-21systemd-run22:05:012
3322411994536,5cyclictest3403127-21systemd-run22:05:012
3322411994533,8cyclictest1421253-21cups-browsed21:11:322
3322411994533,5cyclictest0-21swapper/221:40:332
3322411994532,8cyclictest1421253-21cups-browsed23:50:042
3322411994436,5cyclictest3366597-21latency_hist21:20:022
3322411994436,5cyclictest3366597-21latency_hist21:20:022
3322411994430,8cyclictest420-21avahi-daemon21:30:152
3322410994436,5cyclictest3340412-21systemd-run20:10:011
3322410994434,6cyclictest3512995-21aten_r2power_vo00:20:201
332240999442,25cyclictest3525676-21rm00:35:330
3322409994418,23cyclictest0-21swapper/021:50:430
332240999441,13cyclictest3339872-21ntpq20:05:360
3322411994334,5cyclictest3415303-21sendmail22:20:012
3322411994333,7cyclictest1421253-21cups-browsed22:52:162
3322410994337,3cyclictest0-21swapper/123:25:011
3322410994334,6cyclictest3412795-21timerandwakeup22:15:421
332241099433,32cyclictest3485583-21ssh23:45:371
3322409994335,5cyclictest3427543-21munin-plugin-st22:35:010
332240999431,33cyclictest3412369-21ssh22:15:310
3322411994233,5cyclictest3439776-21cut22:50:012
3322411994232,6cyclictest3356905-21systemd-run21:05:012
332241199422,33cyclictest3420729-21ssh22:25:382
3322410994234,3cyclictest0-21swapper/122:25:431
332241099422,32cyclictest3477500-21ssh23:35:321
332240999424,7cyclictest3469658-21ntpq23:25:360
332240999422,6cyclictest3327803-21ntpq19:25:300
3322409994226,10cyclictest12350irq/32-eth022:55:310
3322409994222,17cyclictest3520486-21systemd-run00:30:010
3322409994217,23cyclictest439-21systemd-logind22:05:010
3322409994217,23cyclictest439-21systemd-logind22:05:010
332240999421,12cyclictest3432799-21ntpq22:40:320
3322409994210,2cyclictest0-21swapper/020:10:340
3322411994131,7cyclictest3367641-21ntp_kernel_err21:20:282
3322411994122,11cyclictest3521684-21ssh00:30:362
3322410994132,6cyclictest1-21systemd00:15:011
3322410994130,8cyclictest3399583-21aten_r2power_vo22:00:201
3322410994130,8cyclictest3399583-21aten_r2power_vo22:00:201
332240999414,10cyclictest3362071-21ssh21:14:180
3322409994134,4cyclictest3356905-21systemd-run21:05:010
332240999412,15cyclictest3465503-21ntpq23:20:330
3322409994118,20cyclictest0-21swapper/021:25:380
3322409994116,23cyclictest3411245-21latency_hist22:15:020
332240999411,13cyclictest3383898-21ntpq21:40:300
332240999411,13cyclictest3325057-21switchtime19:15:400
3322411994033,4cyclictest0-21swapper/223:10:002
3322411994032,5cyclictest3352371-21cron20:50:002
332241199402,34cyclictest3485631-21sh23:45:392
3322410994032,5cyclictest420-21avahi-daemon00:25:291
3322410994031,4cyclictest0-21swapper/100:00:361
3322410994030,6cyclictest3474158-21unixbench_multi23:30:411
332240999402,8cyclictest3329375-21ntpq19:30:330
332240999402,14cyclictest3457294-21ssh23:10:310
3322409994019,18cyclictest0-21swapper/023:40:370
3322409994014,2cyclictest0-21swapper/000:10:230
3322409994011,6cyclictest3345409-21/usr/sbin/munin20:25:240
332240999401,13cyclictest3497510-21ssh00:00:300
332240999401,11cyclictest3439220-21ssh22:48:580
3322411993928,5cyclictest0-21swapper/222:20:252
332241199392,27cyclictest3493562-21ssh23:55:332
332241199392,27cyclictest3493562-21ssh23:55:332
3322410993931,5cyclictest3358376-21diskmemload23:15:241
3322410993928,7cyclictest3489650-21proc_pri23:50:361
332241099392,22cyclictest3416445-21ssh22:20:311
332240999399,6cyclictest3509583-21ssh00:15:310
332240999393,7cyclictest3367741-21ssh21:20:320
332240999393,6cyclictest3428673-21ntpq22:35:320
3322409993933,4cyclictest3378726-21ls21:35:000
332240999393,17cyclictest3461415-21ssh23:15:330
3322409993926,9cyclictest3513987-21timerandwakeup00:20:400
332240999392,14cyclictest3350240-21ntpq20:40:280
332240999392,14cyclictest3350240-21ntpq20:40:280
3322409993914,2cyclictest0-21swapper/023:35:330
3322409993914,22cyclictest3418750-21sh22:23:490
332240999391,13cyclictest3489609-21ssh23:50:350
3322411993829,6cyclictest3464984-21/usr/sbin/munin23:20:222
3322411993828,6cyclictest3358377-21munin-run21:10:012
3322411993826,7cyclictest3496353-21cupsd00:39:252
3322411993825,5cyclictest1054-21mta-sts-daemon22:11:442
3322410993831,4cyclictest3452037-21debian-sa123:05:001
3322410993828,5cyclictest0-21swapper/122:55:321
332241099382,29cyclictest3453124-21ssh23:05:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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