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2026-09-06 - 13:09

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 Sun Sep 06, 2026 00:42:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
556278995041,6cyclictest619661-21cut21:55:011
556278994638,5cyclictest577295-21systemd-run20:20:011
556277994640,4cyclictest571249-21sendmail20:00:010
556279994434,6cyclictest698180-21cron00:05:002
556279994235,4cyclictest637828-21idleruntime-cro22:25:012
556279994233,5cyclictest1001-21mta-sts-daemon22:54:312
556278994234,5cyclictest704195-21idleruntime-cro00:15:011
556278994234,5cyclictest1-21systemd00:40:021
556277994236,4cyclictest1-21systemd23:45:020
556278994133,5cyclictest689085-21cron23:50:011
556278994133,5cyclictest610684-21idleruntime-cro21:40:011
556278994031,6cyclictest1-21systemd21:15:011
556278994030,7cyclictest634787-21cron22:20:001
55627999393,30cyclictest596557-21ssh21:16:072
556279993932,4cyclictest610692-21munin-plugin-st21:40:012
556279993932,4cyclictest601490-21grep21:25:012
556279993930,5cyclictest665-21snmpd22:56:162
556279993929,6cyclictest669772-21tail23:16:192
556279993929,6cyclictest563754-21cron19:35:012
556279993929,6cyclictest560794-21true19:25:012
556278993930,6cyclictest421-21dbus-daemon22:25:491
556278993930,5cyclictest421-21dbus-daemon23:42:511
556277993927,3cyclictest0-21swapper/022:36:220
556279993832,3cyclictest0-21swapper/221:46:212
556279993830,5cyclictest689095-21munin-run23:50:012
556279993826,8cyclictest705823-21timerandwakeup00:16:182
556278993832,3cyclictest0-21swapper/121:20:011
556278993831,4cyclictest707228-21sendmail00:20:011
556277993830,5cyclictest711681-21systemctl00:26:160
556279993731,3cyclictest631759-21kworker/u8:10-xprtiod22:40:012
556279993729,5cyclictest630508-21unixbench_multi22:11:222
556279993729,5cyclictest630508-21unixbench_multi22:11:222
556279993729,5cyclictest587780-21systemd-run20:55:012
556279993729,5cyclictest587780-21systemd-run20:55:012
55627899374,10cyclictest708485-21ntpq00:21:101
556278993729,5cyclictest612534-21grep21:41:321
556278993729,5cyclictest607622-21idleruntime-cro21:35:011
556278993712,5cyclictest28-21ksoftirqd/121:26:111
556279993628,5cyclictest566789-21systemd-run19:45:012
55627899363,10cyclictest588737-21ntpq20:56:121
55627899363,10cyclictest588737-21ntpq20:56:121
556278993628,5cyclictest678539-21mailstats23:31:151
556278993628,5cyclictest675282-21ntpq23:26:101
556278993628,5cyclictest560799-21systemd-run19:25:011
556278993611,4cyclictest28-21ksoftirqd/123:00:421
556278993611,4cyclictest28-21ksoftirqd/123:00:421
55627799366,10cyclictest602634-21sh21:26:060
556277993631,3cyclictest607624-21grep21:35:010
556277993629,4cyclictest578923-21latency_hist20:25:020
556277993621,3cyclictest171rcu_preempt19:30:030
556277993619,3cyclictest171rcu_preempt22:55:010
556277993610,10cyclictest14-21ksoftirqd/021:00:010
556277993610,10cyclictest14-21ksoftirqd/021:00:010
556279993528,4cyclictest717759-21mailstats00:36:202
556279993527,5cyclictest672753-21sed23:21:202
556279993526,6cyclictest621505-21unixbench_singl21:56:222
556279993525,8cyclictest699328-21needreboot00:06:092
556278993529,4cyclictest713370-21latency_hist00:30:021
556278993527,5cyclictest592268-21idleruntime-cro21:10:001
556278993527,5cyclictest592268-21idleruntime-cro21:10:001
556278993527,5cyclictest563754-21cron19:35:011
556278993525,6cyclictest590788-21systemd-run21:05:011
556277993528,4cyclictest593646-21sh21:11:130
556277993528,4cyclictest574145-21unixbench_multi20:06:260
556277993527,5cyclictest1-21systemd00:10:010
556277993510,21cyclictest12750irq/33-eth022:16:080
556279993426,5cyclictest680073-21grep23:35:012
556279993426,5cyclictest647707-21fschecks_time22:41:012
556279993426,5cyclictest612541-21ssh21:41:322
556279993426,5cyclictest603341-21unixbench_singl21:26:202
556279993426,5cyclictest561297-21fschecks_count19:26:002
556279993426,4cyclictest0-21swapper/221:31:162
556279993421,3cyclictest171rcu_preempt22:45:152
556279993418,7cyclictest665-21snmpd22:26:102
556279993415,10cyclictest428-21mta-sts-daemon00:21:122
556278993427,4cyclictest654621-21timerwakeupswit22:51:241
556278993425,6cyclictest559315-21latency_hist19:20:021
556278993422,8cyclictest3037047-21cups-browsed22:12:361
556278993422,8cyclictest3037047-21cups-browsed22:12:361
556278993412,5cyclictest28-21ksoftirqd/122:56:081
556278993410,5cyclictest28-21ksoftirqd/122:44:171
556277993429,3cyclictest0-21swapper/022:50:010
556277993425,7cyclictest702992-21unixbench_singl00:11:210
556277993420,4cyclictest556219-21kworker/u8:11-xprtiod19:21:070
556279993325,5cyclictest625711-21idleruntime-cro22:05:012
556279993324,6cyclictest3136330-21munin-node21:50:372
556279993324,5cyclictest1001-21mta-sts-daemon19:16:092
556279993314,3cyclictest171rcu_preempt20:21:102
55627899338,7cyclictest623887-21ntpq22:01:081
55627899337,8cyclictest564104-21aten_r2power_po19:35:581
55627899334,12cyclictest670060-21sh23:17:001
556278993327,3cyclictest0-21swapper/123:10:011
556278993327,3cyclictest0-21swapper/123:10:011
556278993326,4cyclictest628840-21latency_hist22:10:031
556278993325,5cyclictest638020-21latency_hist22:25:021
556278993325,5cyclictest574286-21systemd-run20:10:021
556278993323,8cyclictest592269-21diskmemload23:11:151
556278993323,8cyclictest592269-21diskmemload23:11:151
556278993321,8cyclictest3037047-21cups-browsed20:21:101
556278993318,9cyclictest584155-21ntpq20:41:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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