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2026-03-30 - 15:14

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 Mar 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101690995445,4cyclictest0-21swapper/111:45:341
101690995242,6cyclictest223433-21systemd-run10:55:011
101691995141,6cyclictest548-21gdbus10:04:572
101691995040,6cyclictest3424687-21cups-browsed09:56:402
101690995041,6cyclictest227645-21latency_hist11:00:021
101690994941,4cyclictest0-21swapper/112:00:271
101691994842,3cyclictest0-21swapper/209:10:272
101691994841,3cyclictest0-21swapper/210:55:012
101691994738,6cyclictest421-21dbus-daemon10:35:022
101690994739,5cyclictest1-21systemd10:35:011
101690994712,30cyclictest281813-21ssh12:05:311
101689994629,5cyclictest420-21avahi-daemon09:29:420
101691994537,5cyclictest309316-21systemd-run12:40:012
101691994434,6cyclictest211227-21munin-run10:40:012
101689994421,12cyclictest151ktimers/008:00:260
101691994335,5cyclictest186796-21latency_hist10:10:022
101691994334,6cyclictest261-21systemd-journal11:40:502
101690994333,6cyclictest0-21swapper/112:00:011
101689994334,5cyclictest248002-21kworker/u8:7-rpciod12:20:280
101691994234,5cyclictest273185-21fschecks_count11:55:232
101691994233,6cyclictest261-21systemd-journal11:08:272
101689994222,15cyclictest12350irq/32-eth009:15:300
101690994134,3cyclictest0-21swapper/110:40:011
101689994133,5cyclictest151ktimers/010:30:340
101691994031,6cyclictest109180-21cut07:35:012
101691994030,6cyclictest420-21avahi-daemon11:26:132
101691994030,6cyclictest420-21avahi-daemon11:26:132
101690994031,6cyclictest186742-21unin-run10:10:011
101689994033,5cyclictest0-21swapper/012:30:190
101691993932,4cyclictest158103-21cron09:35:012
101691993931,5cyclictest277276-21fschecks_count12:00:222
101691993929,7cyclictest421-21dbus-daemon09:19:582
101690993932,4cyclictest174490-21systemctl09:55:011
101690993930,6cyclictest1-21systemd07:10:011
101690993930,5cyclictest231748-21latency_hist11:05:021
101690993929,6cyclictest272647-21latency_hist11:55:021
10168999394,30cyclictest285910-21ssh12:10:310
101689993932,4cyclictest301300-21latency_hist12:30:020
101689993912,19cyclictest12350irq/32-eth010:00:290
101691993828,6cyclictest439-21systemd-logind07:20:012
101691993828,6cyclictest1-21systemd07:45:012
101690993832,3cyclictest0-21swapper/111:35:001
101690993829,5cyclictest137667-21munin-plugin-st09:10:011
101690993829,3cyclictest0-21swapper/111:25:261
101690993829,3cyclictest0-21swapper/111:25:261
101689993829,7cyclictest106189-21grep07:25:010
101689993819,12cyclictest12350irq/32-eth009:10:310
101689993817,15cyclictest12350irq/32-eth009:30:250
101691993730,3cyclictest0-21swapper/209:20:312
101691993729,4cyclictest297057-21latency_hist12:25:012
101691993728,5cyclictest1-21systemd09:40:022
101691993727,7cyclictest3424687-21cups-browsed10:21:172
101691993727,6cyclictest305224-21ssh12:35:012
101690993729,5cyclictest548-21gdbus11:40:361
101690993723,3cyclictest171rcu_preempt10:25:021
10169099371,30cyclictest285812-21ssh12:10:281
101690993711,20cyclictest421-21dbus-daemon07:45:281
101690993711,20cyclictest421-21dbus-daemon07:45:281
10168999374,27cyclictest200027-21sshd10:25:270
101689993731,4cyclictest256104-21cron11:35:000
101689993730,5cyclictest0-21swapper/012:00:010
101689993728,6cyclictest151ktimers/012:35:350
101691993630,3cyclictest264015-21kworker/u8:12-rpciod11:55:012
101691993630,3cyclictest0-21swapper/212:15:272
101691993630,3cyclictest0-21swapper/212:15:272
101691993628,4cyclictest0-21swapper/207:25:292
101691993627,6cyclictest133171-21systemd-run08:55:012
101691993625,8cyclictest286303-21timerandwakeup12:10:402
101690993628,5cyclictest235737-21ssh11:10:011
101690993628,5cyclictest142447-21fschecks_count09:15:211
101689993630,4cyclictest420-21avahi-daemon12:05:330
101689993630,3cyclictest0-21swapper/009:49:290
101689993630,3cyclictest0-21swapper/009:49:290
101689993629,5cyclictest175536-21/usr/sbin/munin09:55:270
101689993629,4cyclictest12350irq/32-eth007:40:010
101689993624,6cyclictest12350irq/32-eth010:45:300
10169199358,21cyclictest224577-21ssh10:55:302
101691993527,5cyclictest239787-21cron11:15:012
101691993527,5cyclictest0-21swapper/208:20:012
101691993527,4cyclictest0-21swapper/208:00:012
101691993526,5cyclictest1056-21mta-sts-daemon09:26:342
101691993523,8cyclictest298423-21sendmail_mailtr12:25:392
101691993519,12cyclictest240569-21if_eth011:15:242
10169099353,27cyclictest294054-21ssh12:20:281
101690993527,5cyclictest292908-21idleruntime-cro12:20:001
101690993527,5cyclictest292908-21idleruntime-cro12:20:001
101690993527,5cyclictest163230-21needreboot09:40:251
101690993527,5cyclictest163230-21needreboot09:40:251
101690993527,4cyclictest0-21swapper/109:20:351
101689993528,4cyclictest0-21swapper/010:35:290
101689993526,4cyclictest0-21swapper/010:25:010
101691993427,3cyclictest0-21swapper/211:20:302
101691993426,5cyclictest0-21swapper/207:40:012
101691993426,4cyclictest0-21swapper/210:40:342
101691993426,4cyclictest0-21swapper/210:40:342
101691993426,3cyclictest0-21swapper/209:45:232
101691993426,3cyclictest0-21swapper/209:45:232
101691993425,5cyclictest227960-21aten2.4-expect11:00:172
101691993425,5cyclictest190794-21grep10:15:012
101691993425,4cyclictest0-21swapper/210:15:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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