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2026-08-04 - 03:11

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 Aug 04, 2026 00:43:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1076088995444,7cyclictest1158062-21latency_hist22:25:022
1076087995041,5cyclictest0-21swapper/123:40:541
1076086994918,23cyclictest665-21snmpd22:55:500
1076087994840,5cyclictest1176127-21systemd-run22:55:021
1076086994831,5cyclictest1182765-21aten_r2power_vo23:05:410
1076087994636,7cyclictest1086711-21kworker/u8:13-xprtiod21:25:551
1076087994636,7cyclictest1086711-21kworker/u8:13-xprtiod21:25:551
1076088994536,6cyclictest1188233-21grep23:15:012
1076086994527,14cyclictest1218156-40mandb00:04:060
1076087994435,6cyclictest421-21dbus-daemon23:15:011
107608799441,25cyclictest1150014-21diskmemload22:10:521
1076088994334,5cyclictest1103060-21sendmail20:40:012
1076087994329,11cyclictest1138261-21timerwakeupswit21:51:031
107608799431,37cyclictest1213533-21ssh23:55:531
107608699432,35cyclictest151ktimers/022:00:560
107608699432,35cyclictest151ktimers/022:00:560
1076087994235,4cyclictest1179135-21sendmail23:00:011
1076087994234,4cyclictest0-21swapper/123:20:011
1076087994233,5cyclictest1197782-21aten_r2power_en23:30:411
1076088994033,4cyclictest1230591-21munin-run00:25:012
1076088994032,5cyclictest1121282-21ssh21:25:012
1076088994032,5cyclictest1121282-21ssh21:25:012
1076088994030,6cyclictest420-21avahi-daemon20:21:042
1076088994027,9cyclictest1225509-21missed_timers00:15:492
107608799405,30cyclictest1207549-21ssh23:45:591
1076087994031,6cyclictest1142794-21latency_hist22:00:021
1076087994030,6cyclictest1118283-21latency_hist21:20:021
1076087994029,4cyclictest0-21swapper/122:15:571
107608899395,28cyclictest1216678-21rm00:00:552
1076087993931,5cyclictest1109105-21systemd-run21:00:011
1076087993930,6cyclictest1100080-21munin-plugin-st20:30:011
1076087993930,5cyclictest1133559-21munin-plugin-st21:45:011
1076087993921,13cyclictest3575727-21cups-browsed23:00:591
1076087993921,13cyclictest3575727-21cups-browsed23:00:591
1076086993932,5cyclictest1191391-21latency_hist23:20:020
1076086993932,4cyclictest1134629-21needreboot21:45:500
1076088993829,6cyclictest1107564-21munin-plugin-st20:55:012
1076087993831,4cyclictest1197294-21systemd-run23:30:011
1076087993831,3cyclictest0-21swapper/122:21:121
1076088993729,5cyclictest1224514-21latency_hist00:15:012
1076088993728,6cyclictest1133598-21latency_hist21:45:022
1076087993730,3cyclictest0-21swapper/122:01:041
1076087993730,3cyclictest0-21swapper/122:01:041
1076087993729,5cyclictest1127483-21latency_hist21:35:011
1076087993729,5cyclictest1127483-21latency_hist21:35:011
1076086993731,4cyclictest1101573-21cut20:35:010
1076086993730,4cyclictest1159657-21unixbench-2d22:26:090
1076088993629,4cyclictest1160982-21munin-run22:30:012
1076088993628,5cyclictest1212401-21systemd-run23:55:022
1076088993628,4cyclictest0-21swapper/221:15:552
1076087993629,4cyclictest1185206-21idleruntime-cro23:10:001
1076087993628,5cyclictest1233640-21systemd-run00:30:021
1076087993627,5cyclictest1098582-21munin-plugin-st20:25:011
1076086993630,4cyclictest1000-21mta-sts-daemon23:40:530
1076086993628,5cyclictest420-21avahi-daemon22:53:390
1076086993627,7cyclictest1227545-21munin-plugin-st00:20:010
107608899353,24cyclictest1122470-21ssh21:25:542
107608899353,24cyclictest1122470-21ssh21:25:542
1076088993530,2cyclictest0-21swapper/200:40:012
1076088993527,5cyclictest1128216-21gltestperf21:35:452
1076088993526,5cyclictest1079073-21munin-run19:20:012
1076088993525,6cyclictest420-21avahi-daemon23:30:092
107608899352,26cyclictest1153038-21ssh22:15:502
1076087993527,4cyclictest1002-21mta-sts-daemon00:15:551
1076086993528,4cyclictest1003-21mta-sts-daemon22:33:200
1076086993526,6cyclictest1215473-21cups-browsed00:05:100
1076086993524,7cyclictest3575727-21cups-browsed20:40:540
107608699352,22cyclictest3575727-21cups-browsed21:20:580
107608699352,22cyclictest3575727-21cups-browsed21:20:580
1076086993520,10cyclictest12650irq/32-eth021:16:000
1076088993427,4cyclictest1164034-21latency_hist22:35:022
1076088993424,6cyclictest1-21systemd23:30:012
1076088993424,6cyclictest1176107-21idleruntime-cro22:55:012
1076088993422,8cyclictest1180766-21timerwakeupswit23:01:042
1076088993422,8cyclictest1180766-21timerwakeupswit23:01:042
1076087993426,5cyclictest1079075-21munin-plugin-st19:20:011
1076087993426,4cyclictest0-21swapper/122:45:531
1076087993425,7cyclictest1080589-21/usr/sbin/munin19:25:021
1076087993425,6cyclictest1003-21mta-sts-daemon22:05:501
1076087993425,6cyclictest1003-21mta-sts-daemon22:05:501
1076087993424,7cyclictest1165666-21unixbench_multi22:36:021
1076086993428,4cyclictest1235141-21timerandwakeup00:31:030
1076086993428,4cyclictest1128195-21fschecks_count21:35:440
1076086993427,5cyclictest0-21swapper/023:15:020
1076086993423,8cyclictest1223254-21users00:11:020
1076086993421,10cyclictest1103056-21cron20:40:010
107608699341,27cyclictest1201549-21ntp_states23:35:570
1076088993326,4cyclictest1086809-21/usr/sbin/munin19:46:062
1076088993326,4cyclictest1086809-21/usr/sbin/munin19:46:062
1076088993325,5cyclictest420-21avahi-daemon21:10:522
1076088993324,5cyclictest420-21avahi-daemon23:57:302
1076088993322,8cyclictest1204527-21gcc23:40:532
1076088993314,15cyclictest421-21dbus-daemon20:05:512
107608899331,26cyclictest1147115-21ssh22:06:002
107608899331,26cyclictest1147115-21ssh22:06:002
107608899331,26cyclictest1137965-21ssh21:50:582
1076087993325,5cyclictest1220009-21timerandwakeup00:06:021
1076087993325,5cyclictest1105949-21tail20:46:031
1076087993324,5cyclictest1193026-21unixbench_singl23:21:141
107608799331,29cyclictest1168262-21ssh22:40:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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