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2026-09-08 - 15:10

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 Sep 08, 2026 12:42:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
965928996047,10cyclictest12650irq/32-eth009:51:090
96593099513,39cyclictest1045952-21ssh10:21:102
965928994940,6cyclictest421-21dbus-daemon09:46:110
965928994927,18cyclictest0-21swapper/010:50:020
965928994821,3cyclictest0-21swapper/009:35:010
965929994739,5cyclictest982445-21systemd-run08:05:021
965928994723,21cyclictest1092078-21unixbench_multi11:36:220
965928994635,8cyclictest12650irq/32-eth010:21:080
965928994632,7cyclictest12650irq/32-eth010:06:070
965928994626,17cyclictest186014-21cups-browsed10:32:050
965928994620,2cyclictest0-21swapper/007:20:010
965930994536,5cyclictest0-21swapper/208:00:012
96593099453,33cyclictest1058086-21ssh10:41:092
965929994519,13cyclictest1096972-21aten_r2power_fr11:45:591
965928994522,20cyclictest420-21avahi-daemon09:21:030
965930994434,6cyclictest1091471-21ntp_kernel_err11:36:102
965928994422,3cyclictest1056874-21systemd10:40:020
965928994422,3cyclictest1056874-21systemd10:40:020
965928994418,3cyclictest0-21swapper/011:41:050
965929994337,3cyclictest0-21swapper/111:16:061
965929994336,4cyclictest1106639-21needreboot12:01:061
965928994335,3cyclictest0-21swapper/007:26:100
965928994323,4cyclictest0-21swapper/012:31:100
96592899431,20cyclictest1097584-21sh11:46:090
965930994233,5cyclictest1032488-21cron10:00:012
965930994233,5cyclictest1032488-21cron10:00:012
965930994233,5cyclictest1021172-21fschecks_count09:41:022
965929994212,12cyclictest1018675-21ps09:36:171
96592899422,7cyclictest421-21dbus-daemon10:13:450
965930994132,5cyclictest421-21dbus-daemon12:06:172
965929994133,5cyclictest1-21systemd09:20:011
965929994132,6cyclictest186014-21cups-browsed09:31:071
965929994112,8cyclictest1021587-21ntpq09:41:101
965928994134,3cyclictest0-21swapper/011:06:060
965928994126,3cyclictest1082464-21ssh11:21:140
965928994126,3cyclictest1082464-21ssh11:21:140
965928994126,12cyclictest1050738-21cron10:30:010
965928994117,2cyclictest0-21swapper/009:36:170
965928994117,2cyclictest0-21swapper/007:12:040
965930994031,6cyclictest985432-21systemd-run08:15:012
965930994030,6cyclictest186014-21cups-browsed12:00:062
965930994027,9cyclictest420-21avahi-daemon11:16:172
965929994034,4cyclictest1002-21mta-sts-daemon09:46:001
965929994017,7cyclictest978762-21ntpq07:51:051
965929994011,10cyclictest1112797-21ntpq12:11:131
965929994011,10cyclictest1112797-21ntpq12:11:131
965928994034,4cyclictest1117654-21ssh12:20:010
96592899403,28cyclictest420-21avahi-daemon09:11:090
96592899403,28cyclictest420-21avahi-daemon09:11:090
96592899402,23cyclictest1128110-21ssh12:36:140
965928994015,4cyclictest0-21swapper/010:40:420
965928994013,7cyclictest12650irq/32-eth011:31:140
96592899401,19cyclictest1064283-21ssh10:51:140
965930993933,3cyclictest0-21swapper/210:40:012
965930993933,3cyclictest0-21swapper/210:40:012
96592999399,8cyclictest1125789-21ssh12:32:001
965929993934,2cyclictest0-21swapper/109:21:031
965929993933,3cyclictest0-21swapper/110:01:141
965929993932,4cyclictest1003-21mta-sts-daemon10:53:451
965929993914,8cyclictest996822-21ntpq08:51:091
965929993912,8cyclictest995376-21ntp_states08:46:121
965929993912,10cyclictest992559-21switchtime08:36:201
965928993931,5cyclictest12650irq/32-eth012:21:050
96592899393,10cyclictest1042872-21ssh10:16:120
965928993929,7cyclictest12650irq/32-eth011:26:090
965928993929,7cyclictest12650irq/32-eth011:26:090
965928993914,7cyclictest994954-21fschecks_time08:46:020
965930993830,4cyclictest0-21swapper/209:11:022
965930993830,4cyclictest0-21swapper/209:11:022
965930993829,6cyclictest1000413-21cron09:05:002
965930993828,6cyclictest997395-21cron08:55:002
965930993827,8cyclictest1011665-21acpi09:25:572
965929993832,3cyclictest0-21swapper/107:20:011
965929993831,3cyclictest0-21swapper/108:56:051
965929993824,8cyclictest993846-21ntpq08:41:121
965929993824,8cyclictest993846-21ntpq08:41:121
965929993811,8cyclictest1071943-21ssh11:04:371
96592899383,15cyclictest665-21snmpd10:01:090
965928993830,5cyclictest982439-21systemd-run08:05:010
965928993830,5cyclictest1070801-21unixbench-2d11:01:220
96592899382,31cyclictest1106773-21ssh12:01:110
965930993731,4cyclictest1097339-21kernelversion11:46:042
965930993730,4cyclictest0-21swapper/209:20:012
965930993729,5cyclictest992799-21tail08:36:212
965930993729,5cyclictest1009019-21ssh09:21:042
965930993729,3cyclictest0-21swapper/209:36:102
965929993731,3cyclictest0-21swapper/111:11:101
965929993731,3cyclictest0-21swapper/110:41:161
965929993729,5cyclictest1084338-21latency_hist11:25:021
965929993729,5cyclictest1084338-21latency_hist11:25:021
96592999372,31cyclictest1049034-21rm10:26:111
96592999372,28cyclictest1036749-21ssh10:06:071
965929993711,8cyclictest981026-21wc08:00:021
96592899379,3cyclictest171rcu_preempt11:16:130
965930993629,4cyclictest998910-21awk09:00:012
965930993628,3cyclictest0-21swapper/211:01:142
965930993624,9cyclictest1066955-21kernelversion10:56:042
96592999369,10cyclictest1041261-21ssh10:13:571
965929993630,3cyclictest0-21swapper/112:00:011
965929993625,8cyclictest1073168-21missed_timers11:06:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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