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2026-06-26 - 18:13

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 Jun 26, 2026 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
150193996241,13cyclictest289609-40mandb11:56:370
150194995951,5cyclictest289609-40mandb11:56:361
150194995332,5cyclictest171rcu_preempt08:15:311
150194995141,6cyclictest313617-21unixbench-2d12:35:461
150194995141,6cyclictest313617-21unixbench-2d12:35:461
150193995022,22cyclictest254973-21sshd11:00:320
150194994940,3cyclictest0-21swapper/109:50:301
150195994838,7cyclictest289609-40mandb11:56:412
150195994739,3cyclictest0-21swapper/209:35:012
150194994739,4cyclictest1003-21mta-sts-daemon11:20:351
150193994740,3cyclictest0-21swapper/010:00:330
150193994733,11cyclictest184763-21systemd-run09:05:010
150194994638,4cyclictest0-21swapper/111:10:021
15019399462,23cyclictest187333-21ssh09:10:330
150193994619,10cyclictest12650irq/32-eth010:20:300
150195994538,4cyclictest303039-21idleruntime-cro12:20:012
150194994537,5cyclictest151699-21systemd-run07:15:011
150194994534,8cyclictest160764-21systemd-run07:45:011
150193994517,9cyclictest186233-21diskmemload10:50:300
150193994517,9cyclictest186233-21diskmemload10:50:300
150194994436,4cyclictest210964-21grep09:50:011
15019399441,6cyclictest171rcu_preempt12:15:310
150193994416,21cyclictest267248-21sshd11:20:320
150195994337,3cyclictest0-21swapper/209:00:012
150195994332,7cyclictest0-21swapper/211:40:362
150194994335,4cyclictest0-21swapper/111:00:011
150194994335,4cyclictest0-21swapper/111:00:011
150193994335,3cyclictest195556-21kworker/u8:16-rpciod09:25:220
15019599424,34cyclictest258024-21ssh11:05:322
150195994234,5cyclictest1-21systemd12:35:012
150194994235,4cyclictest278438-21cron11:40:011
15019399423,32cyclictest258025-21sshd11:05:320
150193994232,8cyclictest217103-21grep10:00:010
150193994225,11cyclictest12650irq/32-eth012:20:400
150195994133,5cyclictest0-21swapper/209:55:332
150195994133,3cyclictest0-21swapper/212:10:322
150194994130,4cyclictest0-21swapper/109:55:331
150194994129,9cyclictest196445-21missed_timers09:25:281
150193994133,6cyclictest207901-21grep09:45:010
150194994032,5cyclictest227942-21unixbench_singl10:15:431
150194994031,6cyclictest263119-21sh11:15:011
150194994031,6cyclictest256975-21ssh11:05:001
150193994030,6cyclictest151ktimers/012:10:360
150194993931,5cyclictest1-21systemd08:50:021
150193993917,14cyclictest12650irq/32-eth008:40:310
150194993831,5cyclictest312069-21latency_hist12:35:001
150194993830,5cyclictest178655-21unixbench_singl08:40:421
150193993824,4cyclictest0-21swapper/008:20:010
150195993729,5cyclictest192448-21sendmail09:20:012
150195993729,4cyclictest0-21swapper/210:50:372
150195993729,4cyclictest0-21swapper/210:50:372
150195993727,7cyclictest421-21dbus-daemon09:49:232
150195993726,7cyclictest420-21avahi-daemon12:25:312
150195993726,7cyclictest420-21avahi-daemon12:25:312
150194993731,3cyclictest0-21swapper/111:40:321
150194993729,5cyclictest1-21systemd12:05:021
150194993727,6cyclictest3545678-21cups-browsed10:20:571
15019499372,29cyclictest218117-21ssh10:00:301
150194993710,20cyclictest665-21snmpd09:35:351
150193993731,4cyclictest315090-21munin-run12:40:000
150193993731,4cyclictest315090-21munin-run12:40:000
150193993731,4cyclictest160764-21systemd-run07:45:010
150193993730,4cyclictest189968-21fschecks_count09:15:240
150193993726,8cyclictest309961-21missed_timers12:30:270
15019399371,31cyclictest264156-21ntpq11:15:320
15019599363,29cyclictest294862-21sshd12:05:322
150195993628,5cyclictest186252-21systemd-run09:10:012
150195993624,9cyclictest245465-21sh10:45:282
150195993620,11cyclictest3545678-21cups-browsed11:35:362
150194993627,6cyclictest166778-21latency_hist08:05:011
150194993627,6cyclictest166778-21latency_hist08:05:011
150194993626,7cyclictest206277-21timerandwakeup09:40:431
150193993628,5cyclictest308885-21sshd12:29:310
150193993628,5cyclictest308885-21sshd12:29:310
150193993624,10cyclictest151681-21cut07:15:010
150195993526,5cyclictest1003-21mta-sts-daemon09:35:442
150195993524,7cyclictest312393-21/usr/sbin/munin12:35:272
150195993524,7cyclictest312393-21/usr/sbin/munin12:35:272
150195993523,8cyclictest266181-21cron11:20:012
150194993528,3cyclictest0-21swapper/109:25:011
150194993526,5cyclictest162746-21fschecks_count07:50:261
150193993525,6cyclictest3545678-21cups-browsed10:40:350
15019599344,20cyclictest270268-21ssh11:25:332
150195993426,5cyclictest306104-21latency_hist12:25:022
150195993426,5cyclictest244859-21latency_hist10:45:022
150195993426,5cyclictest0-21swapper/207:20:012
150195993425,6cyclictest187446-21/usr/sbin/munin09:10:382
150195993423,7cyclictest232923-21aten_r2power_po10:25:212
15019599342,23cyclictest218152-21sshd10:00:322
15019499343,25cyclictest242721-21ssh10:40:351
150194993427,3cyclictest0-21swapper/112:10:251
150194993427,3cyclictest0-21swapper/109:10:021
150194993426,5cyclictest287818-21latency_hist11:55:021
150194993426,5cyclictest264753-21unixbench_singl11:15:441
150194993423,8cyclictest183774-21gltestperf09:00:241
150193993428,3cyclictest1003-21mta-sts-daemon11:10:370
150193993424,6cyclictest420-21avahi-daemon11:37:150
150193993419,9cyclictest12650irq/32-eth011:45:310
150195993326,4cyclictest220025-21kworker/u8:8-nfsiod10:15:012
150195993325,5cyclictest291217-21aten_r2power_po12:00:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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