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2026-09-04 - 12:21

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 Fri Sep 04, 2026 00:42:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1047636996049,6cyclictest0-21swapper/100:31:151
1047636996049,6cyclictest0-21swapper/100:31:151
1047635995742,13cyclictest1183338-21cron23:55:010
1047635995444,5cyclictest0-21swapper/023:56:080
1047636995029,6cyclictest171rcu_preempt20:36:091
1047636994839,5cyclictest0-21swapper/123:01:071
104763699483,5cyclictest171rcu_preempt21:21:201
1047635994736,7cyclictest0-21swapper/022:20:010
1047637994536,5cyclictest694-21cron00:00:012
1047636994536,7cyclictest1117021-21sh22:05:021
1047636994535,7cyclictest1101888-21munin-plugin-st21:40:011
1047636994522,7cyclictest171rcu_preempt20:51:041
104763599453,34cyclictest1157433-21ssh23:11:100
1047637994436,5cyclictest1114516-21aten_r2power_cu22:00:552
1047635994430,11cyclictest0-21swapper/000:20:010
1047635994429,12cyclictest1052248-21latency_hist19:25:020
1047637994333,7cyclictest3527540-21cups-browsed22:15:582
1047636994334,5cyclictest1053700-21latency_hist19:30:021
1047636994334,5cyclictest1053700-21latency_hist19:30:021
1047636994331,8cyclictest1169747-21mailstats23:31:201
1047635994335,4cyclictest1136845-21unixbench_multi22:36:190
1047635994322,18cyclictest1084970-21sh21:11:130
1047636994235,4cyclictest265-21systemd-journal00:40:001
1047635994220,16cyclictest421-21dbus-daemon22:11:120
1047636994133,5cyclictest1186607-21latency_hist00:00:031
104763799404,25cyclictest1112137-21sh21:56:062
1047637994034,3cyclictest0-21swapper/221:00:012
1047636994031,5cyclictest0-21swapper/121:31:111
1047636994027,9cyclictest1196433-21kernelversion00:16:041
1047635994032,3cyclictest0-21swapper/019:11:060
1047635994026,8cyclictest12750irq/33-eth023:26:150
1047637993934,2cyclictest0-21swapper/222:21:072
1047637993933,3cyclictest0-21swapper/221:10:012
1047637993933,3cyclictest0-21swapper/200:40:002
104763699391,32cyclictest1139415-21ssh22:41:121
1047635993930,4cyclictest0-21swapper/022:51:130
1047635993914,15cyclictest12650irq/32-eth023:31:100
1047637993834,2cyclictest0-21swapper/200:06:062
104763799383,24cyclictest1085023-21ssh21:11:142
1047635993824,9cyclictest1163444-21sh23:21:070
1047635993816,4cyclictest0-21swapper/022:01:110
1047637993729,5cyclictest1175110-21fschecks_count23:41:002
1047637993726,8cyclictest1169975-21timerwakeupswit23:31:232
1047637993726,8cyclictest1166251-21kernelversion23:26:062
1047636993729,5cyclictest1000-21mta-sts-daemon21:16:081
1047636993729,5cyclictest1000-21mta-sts-daemon21:16:081
1047635993729,5cyclictest421-21dbus-daemon00:35:010
1047635993729,5cyclictest421-21dbus-daemon00:35:010
1047635993722,12cyclictest1082273-21latency_hist21:05:030
1047635993720,2cyclictest171rcu_preempt19:41:060
1047635993715,18cyclictest1154385-21ssh23:06:040
1047635993714,15cyclictest1160565-21ssh23:16:140
1047637993629,3cyclictest0-21swapper/223:21:082
1047637993624,8cyclictest0-21swapper/221:26:082
1047636993629,4cyclictest1130675-21threads22:26:221
1047636993628,5cyclictest1144157-21ssh22:50:021
1047636993628,5cyclictest1071636-21systemd-run20:30:011
1047636993623,10cyclictest1203125-21timerandwakeup00:26:181
1047636993623,10cyclictest1203125-21timerandwakeup00:26:181
104763699362,29cyclictest1118210-21ssh22:06:081
104763699362,29cyclictest1118210-21ssh22:06:081
104763599364,24cyclictest420-21avahi-daemon20:46:110
1047635993629,4cyclictest1129065-21cron22:25:010
1047635993629,4cyclictest1074613-21munin-run20:40:010
1047635993628,5cyclictest1192944-21/usr/sbin/munin00:11:020
1047637993530,2cyclictest0-21swapper/222:40:012
1047637993528,4cyclictest1003-21mta-sts-daemon21:52:032
1047637993528,3cyclictest0-21swapper/221:25:012
1047637993527,4cyclictest0-21swapper/221:36:122
1047637993524,7cyclictest1138725-21aten_r2power_fr22:40:582
104763799352,24cyclictest665-21snmpd19:11:082
1047636993528,3cyclictest0-21swapper/122:00:011
1047635993530,3cyclictest1135117-21latency_hist22:35:020
1047635993528,4cyclictest1201554-21ssh00:25:020
1047635993519,10cyclictest0-21swapper/021:51:090
1047637993427,4cyclictest1110962-21kworker/u8:8-rpciod23:00:012
1047637993427,4cyclictest1110962-21kworker/u8:8-rpciod23:00:012
1047637993427,3cyclictest0-21swapper/223:16:092
1047637993426,5cyclictest1172109-21fschecks_time23:36:012
1047637993426,5cyclictest1089758-21ssh21:20:012
1047637993426,5cyclictest1089758-21ssh21:20:012
1047637993425,6cyclictest1059505-21sed19:46:182
104763699343,25cyclictest1172528-21ssh23:36:101
1047636993426,5cyclictest1082145-21systemd-run21:05:021
1047636993426,5cyclictest1050485-21tail19:16:181
1047636993425,7cyclictest694-21cron21:45:011
104763699342,26cyclictest1127311-21ssh22:21:091
104763699342,25cyclictest1178611-21ssh23:46:101
1047635993426,5cyclictest1080612-21awk21:00:010
1047635993424,4cyclictest1079098-21cron20:55:000
1047635993422,9cyclictest1178878-21ssh23:46:170
1047635993422,5cyclictest1091413-21ssh21:21:290
1047637993327,4cyclictest1047634-21cyclictest23:06:122
1047637993326,3cyclictest0-21swapper/219:41:102
1047637993325,5cyclictest439-21systemd-logind19:40:022
1047637993325,5cyclictest421-21dbus-daemon00:25:022
1047637993325,5cyclictest1150999-21sort23:01:002
1047637993324,6cyclictest485-21in:imuxsock00:30:022
1047637993324,6cyclictest485-21in:imuxsock00:30:022
1047637993324,6cyclictest1000-21mta-sts-daemon22:45:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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