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2026-03-12 - 21:59

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 Thu Mar 12, 2026 07:54:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3614083997748,6cyclictest259418-21sh06:11:221
3614084997462,8cyclictest245590-21sh06:10:462
3614082996543,15cyclictest245088-21tee06:10:450
3614082996452,9cyclictest3853296-21sh05:40:350
3614083995136,12cyclictest3928899-21Run06:02:201
3614084995042,5cyclictest3857904-21od05:40:472
3614084994941,5cyclictest3618784-21whetstone-doubl05:20:012
3614084994941,5cyclictest224900-21sh06:09:532
3614084994941,5cyclictest224900-21sh06:09:532
3614083994840,5cyclictest3889023-21sh05:42:071
3614082994839,6cyclictest151ktimers/006:35:350
3614083994637,5cyclictest143503-21Run06:05:211
3614083994637,5cyclictest143503-21Run06:05:211
3614082994534,8cyclictest202380-21sh06:08:590
3614082994534,8cyclictest202380-21sh06:08:590
3614082994530,10cyclictest0-21swapper/005:20:280
3614084994435,6cyclictest3924112-21execl05:50:272
3614082994431,6cyclictest3924114-21execl05:50:200
3614084994335,5cyclictest564-21dbus-daemon06:25:012
3614082994232,5cyclictest0-21swapper/005:40:010
3614084994031,6cyclictest4116113-21spawn06:03:342
3614082994025,5cyclictest3923864-21execl05:50:030
3614084993932,3cyclictest3620391-21kworker/u8:8-xprtiod05:50:012
3614084993930,6cyclictest1-21systemd05:15:022
3614083993932,4cyclictest0-21swapper/105:50:361
3614083993932,4cyclictest0-21swapper/105:20:011
3614082993818,15cyclictest564-21dbus-daemon05:57:020
3614082993818,15cyclictest564-21dbus-daemon05:57:020
361408399371,30cyclictest3619046-21execl05:20:311
3614083993630,3cyclictest0-21swapper/105:49:541
3614083993628,5cyclictest1165-21mta-sts-daemon05:55:201
3614083993628,5cyclictest1165-21mta-sts-daemon05:55:201
361408299360,30cyclictest3927933-21pipe06:00:350
3614084993525,7cyclictest1167-21mta-sts-daemon05:23:232
3614083993527,5cyclictest0-21swapper/105:35:011
3614082993517,14cyclictest191rcuc/006:20:290
3614084993427,4cyclictest3826936-21multi.sh05:38:282
361408399340,30cyclictest3620602-21fstime05:25:311
3614082993428,3cyclictest0-21swapper/005:05:010
3614082993427,4cyclictest3622102-21latency_hist05:30:020
3614084993325,5cyclictest563-21avahi-daemon05:55:382
3614084993325,5cyclictest563-21avahi-daemon05:55:382
3614084993324,6cyclictest564-21dbus-daemon05:30:012
3614083993321,9cyclictest302278-21ntp_kernel_pll_06:20:291
3614082993317,13cyclictest191rcuc/005:05:310
3614084993123,5cyclictest3494830-21cups-browsed06:35:562
3614083993123,5cyclictest0-21swapper/105:10:011
3614083993023,3cyclictest0-21swapper/105:35:241
3614082993017,3cyclictest171rcu_preempt05:15:310
3614084992920,6cyclictest305897-21cron06:35:002
3614084992918,7cyclictest3748699-21spawn05:35:002
361408399295,18cyclictest3603882-21munin-node05:10:321
3614083992923,3cyclictest0-21swapper/106:40:011
3614082992923,4cyclictest3616957-21unixbench_multi05:10:410
361408399285,16cyclictest1165-21mta-sts-daemon06:15:311
361408599274,7cyclictest0-21swapper/306:10:463
361408299273,3cyclictest171rcu_preempt06:15:360
361408299272,3cyclictest171rcu_preempt06:25:310
361408299272,3cyclictest171rcu_preempt06:25:310
3614082992722,3cyclictest3614081-21cyclictest05:34:140
361408299271,3cyclictest171rcu_preempt06:30:310
361408599262,18cyclictest0-21swapper/305:57:013
361408599262,18cyclictest0-21swapper/305:57:013
361408599252,6cyclictest0-21swapper/305:40:413
361408599251,8cyclictest0-21swapper/305:53:353
3614083992517,5cyclictest303592-21latency06:25:251
3614083992517,5cyclictest303592-21latency06:25:251
3614084992419,2cyclictest0-21swapper/206:25:412
3614084992419,2cyclictest0-21swapper/206:25:412
3614084992414,7cyclictest300621-21cat06:15:282
3614083992416,5cyclictest3494830-21cups-browsed06:35:011
361408599233,5cyclictest0-21swapper/305:20:283
361408599222,6cyclictest0-21swapper/306:07:253
361408599222,6cyclictest0-21swapper/306:07:253
361408599221,5cyclictest0-21swapper/305:45:283
361408499212,15cyclictest3614294-21/usr/sbin/munin05:05:422
361408599203,3cyclictest0-21swapper/305:15:283
3614084991910,6cyclictest3614104-21latency_hist05:05:022
3614083991913,3cyclictest0-21swapper/105:05:021
361408599163,9cyclictest0-21swapper/306:02:203
361408599153,6cyclictest0-21swapper/305:25:283
361408599152,7cyclictest0-21swapper/306:30:353
361408599133,8cyclictest0-21swapper/305:30:283
361408599104,4cyclictest0-21swapper/306:15:293
361408599104,4cyclictest0-21swapper/305:35:303
361408599103,5cyclictest0-21swapper/306:25:293
361408599103,5cyclictest0-21swapper/306:25:293
361408599102,7cyclictest0-21swapper/306:20:323
361408599102,6cyclictest0-21swapper/306:35:293
361408599101,6cyclictest0-21swapper/305:05:273
36140859983,3cyclictest0-21swapper/305:10:283
36140859982,4cyclictest0-21swapper/305:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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