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2026-07-14 - 12:40

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 Tue Jul 14, 2026 00:43:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3711733996656,5cyclictest0-21swapper/222:15:432
3711733996656,5cyclictest0-21swapper/222:15:432
3711733995343,6cyclictest3744738-21systemd-run21:00:012
371173399522,42cyclictest3851266-21ssh00:00:402
3711731995243,5cyclictest3748920-21ssh21:10:450
3711731995239,10cyclictest3814077-21munin-run23:00:010
3711731995125,3cyclictest3779057-21ssh22:00:390
3711733995038,7cyclictest3775954-21needreboot21:55:382
3711733995036,7cyclictest1003-21mta-sts-daemon21:25:472
3711732995043,3cyclictest0-21swapper/122:55:011
371173399492,38cyclictest3866240-21ssh00:25:402
3711731994937,6cyclictest151ktimers/022:05:400
3711732994842,3cyclictest0-21swapper/121:15:421
3711732994842,3cyclictest0-21swapper/121:15:421
3711733994638,3cyclictest0-21swapper/200:20:012
3711733994638,3cyclictest0-21swapper/200:20:012
371173399461,39cyclictest3767003-21ssh21:40:402
371173399455,5cyclictest3833251-21ssh23:30:432
371173399455,5cyclictest3833251-21ssh23:30:432
371173399454,31cyclictest3845205-21ssh23:50:392
3711733994535,7cyclictest3750785-21idleruntime-cro21:15:012
3711733994535,6cyclictest3848798-21unixbench_multi23:55:542
3711731994532,10cyclictest3799024-21latency_hist22:35:010
3711731994433,7cyclictest3743211-21cut20:55:010
3711731994430,5cyclictest3871810-21cpuspeed00:35:320
3711733994333,4cyclictest0-21swapper/221:30:392
3711732994324,13cyclictest421-21dbus-daemon22:40:421
3711731994336,4cyclictest3802056-21tr22:40:010
3711731994335,5cyclictest3826122-21grep23:20:010
3711732994234,5cyclictest3771948-21ssh21:50:011
3711732994234,4cyclictest3826122-21grep23:20:011
3711732994230,8cyclictest1961693-21cups-browsed23:47:181
3711731994218,17cyclictest3836319-21ssh23:35:460
3711733994130,7cyclictest420-21avahi-daemon00:05:122
3711733994130,7cyclictest1961693-21cups-browsed23:13:012
3711731994129,9cyclictest3850238-21cups-browsed00:30:410
371173399408,19cyclictest3824234-21ssh23:15:432
371173399401,33cyclictest3764077-21ssh21:35:452
371173399400,8cyclictest3747714-21diskmemload23:40:412
3711732994032,5cyclictest3802061-21rm22:40:011
3711732994031,5cyclictest3776087-21ssh21:55:441
3711732994028,8cyclictest3830623-21timerandwakeup23:25:561
3711732994028,8cyclictest3830623-21timerandwakeup23:25:561
3711731994031,6cyclictest1961693-21cups-browsed21:43:250
3711733993927,9cyclictest3793053-21ssh22:25:012
371173299397,4cyclictest171rcu_preempt23:20:431
371173299397,4cyclictest171rcu_preempt23:20:431
3711732993932,4cyclictest3726704-21grep20:00:011
3711732993931,5cyclictest3747714-21diskmemload23:05:021
3711732993930,6cyclictest3759910-21latency_hist21:30:011
371173299392,31cyclictest3839258-21ssh23:40:431
3711731993932,5cyclictest421-21dbus-daemon21:10:020
3711731993931,5cyclictest421-21dbus-daemon00:05:450
3711733993829,5cyclictest3793596-21cpu22:25:312
371173299384,30cyclictest3773136-21ssh21:50:451
3711732993830,5cyclictest3787034-21systemd-run22:15:021
371173199383,32cyclictest3776021-21ssh21:55:410
3711731993827,8cyclictest3760826-21missed_timers21:30:350
3711733993729,5cyclictest3862725-21aten_r2power_vo00:20:302
3711733993729,5cyclictest3829143-21cron23:25:012
3711733993729,5cyclictest3829143-21cron23:25:012
3711733993729,5cyclictest3820192-21latency_hist23:10:022
3711733993727,7cyclictest1961693-21cups-browsed22:04:432
3711733993725,9cyclictest3737216-21cut20:35:012
3711733993725,9cyclictest3737216-21cut20:35:012
3711732993728,6cyclictest1000-21mta-sts-daemon23:38:541
3711732993727,6cyclictest420-21avahi-daemon00:13:161
3711731993730,4cyclictest3865203-21cron00:25:000
3711731993730,4cyclictest3793589-21cpu22:25:310
3711733993630,3cyclictest0-21swapper/221:10:012
3711733993628,4cyclictest0-21swapper/221:20:372
3711733993627,6cyclictest420-21avahi-daemon23:00:472
3711733993627,6cyclictest3869562-21mailstats00:30:502
3711732993628,5cyclictest3790028-21idleruntime-cro22:20:001
3711732993628,5cyclictest3790028-21idleruntime-cro22:20:001
3711732993628,5cyclictest3716220-21cron19:25:011
371173299361,30cyclictest3833298-21ssh23:30:441
371173299361,30cyclictest3833298-21ssh23:30:441
3711731993629,5cyclictest0-21swapper/021:40:010
3711733993528,3cyclictest0-21swapper/222:40:312
3711733993527,5cyclictest3802032-21cron22:40:012
3711733993527,4cyclictest0-21swapper/222:10:422
3711733993526,4cyclictest0-21swapper/222:35:012
3711733993525,6cyclictest1961690-21cupsd23:48:242
3711733993524,8cyclictest3716229-21/usr/sbin/munin19:25:022
3711733993524,7cyclictest3725207-21sh19:55:012
3711733993520,3cyclictest171rcu_preempt19:10:392
3711732993527,5cyclictest3743504-21aten_r2power_en20:55:301
3711732993527,5cyclictest3725207-21cron19:55:011
3711732993527,3cyclictest0-21swapper/123:15:011
3711732993527,3cyclictest0-21swapper/120:20:431
3711732993525,6cyclictest3869176-21needreboot00:30:371
3711731993529,3cyclictest1000-21mta-sts-daemon21:25:450
3711731993526,6cyclictest3832675-21aten_r2power_vo23:30:310
3711731993526,6cyclictest3832675-21aten_r2power_vo23:30:310
3711731993523,5cyclictest3713208-21cron19:15:010
3711731993522,10cyclictest1961693-21cups-browsed21:15:420
3711731993522,10cyclictest1961693-21cups-browsed21:15:420
3711733993428,3cyclictest0-21swapper/200:15:012
3711733993427,4cyclictest0-21swapper/223:40:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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