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2026-08-17 - 17:08

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 Aug 17, 2026 12:43:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
808279995535,17cyclictest1000-21mta-sts-daemon10:18:482
808279995235,13cyclictest0-21swapper/212:00:012
808279995225,5cyclictest833808-21debian-sa108:35:002
808279995225,23cyclictest905825-21aten_r2power_cu10:50:482
808279995027,19cyclictest0-21swapper/211:25:012
808279994922,5cyclictest1003-21mta-sts-daemon10:11:482
808279994822,4cyclictest814206-21unixbench_multi07:26:082
808277994741,3cyclictest0-21swapper/011:51:060
808277994739,5cyclictest926605-21idleruntime-cro11:25:010
808279994638,4cyclictest0-21swapper/208:55:572
808279994524,2cyclictest0-21swapper/209:55:022
808279994520,4cyclictest0-21swapper/211:45:582
808279994434,6cyclictest421-21dbus-daemon11:05:542
808279994433,3cyclictest0-21swapper/210:36:042
80827999443,15cyclictest970366-21sshd12:35:592
808279994419,3cyclictest878648-21kworker/u8:2-xprtiod10:20:542
808278994337,3cyclictest0-21swapper/112:05:581
808277994338,3cyclictest0-21swapper/012:30:590
808277994338,3cyclictest0-21swapper/012:30:590
808279994218,4cyclictest0-21swapper/212:11:052
808279994218,4cyclictest0-21swapper/212:11:052
808278994234,5cyclictest946599-21unixbench_singl11:56:081
808278994234,4cyclictest862698-21idleruntime-cro09:40:001
808278994234,4cyclictest0-21swapper/110:16:011
808278994233,6cyclictest420-21avahi-daemon09:11:221
808277994236,4cyclictest923538-21cron11:20:010
808279994135,2cyclictest0-21swapper/208:10:012
808279993931,5cyclictest893940-21fschecks_count10:30:522
808279993931,5cyclictest893940-21fschecks_count10:30:522
808279993930,6cyclictest921874-21proc_pri11:16:092
808279993831,5cyclictest808276-21cyclictest12:16:012
808279993824,3cyclictest171rcu_preempt10:00:012
808278993831,3cyclictest0-21swapper/110:11:041
808278993829,6cyclictest421-21dbus-daemon08:00:011
808277993832,4cyclictest911384-21ssh11:00:010
808279993728,6cyclictest969342-21latency_hist12:35:022
808279993728,6cyclictest969342-21latency_hist12:35:022
808279993727,8cyclictest854161-21aten_r2power_vo09:25:492
808278993729,5cyclictest811274-21idleruntime-cro07:20:011
808278993729,4cyclictest890135-21ssh10:25:011
808277993726,8cyclictest866990-21grep09:46:000
808277993723,11cyclictest0-21swapper/010:25:500
808277993723,11cyclictest0-21swapper/010:25:500
808279993629,4cyclictest944857-21kthreadd11:55:012
808279993629,3cyclictest0-21swapper/210:45:502
808278993630,3cyclictest0-21swapper/110:25:491
808278993630,3cyclictest0-21swapper/110:25:491
808278993630,3cyclictest0-21swapper/110:00:011
808278993629,4cyclictest0-21swapper/111:26:031
808278993629,4cyclictest0-21swapper/111:26:031
808278993629,4cyclictest0-21swapper/109:10:011
808278993629,3cyclictest0-21swapper/107:25:021
808278993628,5cyclictest870473-21unixbench-2d09:51:071
808277993632,2cyclictest0-21swapper/012:20:010
808277993632,2cyclictest0-21swapper/009:00:010
80827799362,29cyclictest894421-21ssh10:31:020
80827799362,29cyclictest894421-21ssh10:31:020
808277993612,20cyclictest869948-21ssh09:50:550
808279993527,5cyclictest876609-21unixbench-2d10:01:102
808278993529,3cyclictest0-21swapper/112:01:021
808278993528,4cyclictest1002-21mta-sts-daemon09:24:161
808278993527,5cyclictest912677-21ssh11:01:011
808278993527,5cyclictest843006-21latency_hist09:05:031
808278993527,5cyclictest1002-21mta-sts-daemon11:41:091
808277993528,4cyclictest914455-21ssh11:05:010
808277993528,4cyclictest824932-21latency_hist08:05:020
808277993528,4cyclictest1002-21mta-sts-daemon11:44:560
808277993526,6cyclictest818837-21kthreadd07:45:010
80827799352,28cyclictest915597-21ssh11:05:560
808277993522,10cyclictest0-21swapper/010:06:110
808277993514,17cyclictest151ktimers/012:36:020
808279993429,2cyclictest0-21swapper/207:20:012
808279993426,5cyclictest952721-21unixbench_singl12:06:122
808279993426,5cyclictest912488-21needreboot11:00:542
808279993426,5cyclictest878775-21/usr/sbin/munin10:05:522
808279993425,7cyclictest845739-21mailstats09:11:062
808279993425,6cyclictest860105-21/usr/sbin/munin09:36:082
808279993425,6cyclictest1003-21mta-sts-daemon11:25:492
808279993425,6cyclictest1003-21mta-sts-daemon11:25:492
808279993423,7cyclictest14482-21cups-browsed10:29:232
808279993423,7cyclictest14482-21cups-browsed10:29:232
808278993428,3cyclictest0-21swapper/111:11:141
808278993428,3cyclictest0-21swapper/108:40:001
808278993427,4cyclictest855125-21timerandwakeup09:26:091
808278993427,4cyclictest824727-21unixbench_multi08:01:101
808278993426,5cyclictest863516-21ssh09:40:541
808278993426,5cyclictest0-21swapper/108:50:021
808278993424,7cyclictest879455-21switchtime10:06:091
808278993422,8cyclictest857229-21cpu09:30:481
808277993426,5cyclictest847834-21/usr/sbin/munin09:16:080
808277993426,5cyclictest847834-21/usr/sbin/munin09:16:080
80827799342,17cyclictest939931-21ssh11:45:580
808277993420,10cyclictest12650irq/32-eth010:36:000
80827799341,30cyclictest151ktimers/011:31:030
80827799341,30cyclictest151ktimers/011:31:030
808279993326,3cyclictest0-21swapper/211:00:012
808279993322,8cyclictest857681-21needreboot09:30:552
808278993327,3cyclictest0-21swapper/111:20:591
808278993327,3cyclictest0-21swapper/111:20:011
80827899332,6cyclictest171rcu_preempt07:45:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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