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2026-08-11 - 09:44

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 11, 2026 00:43:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1294124996049,8cyclictest1340210-21if_eth021:25:482
129412399532,36cyclictest1435412-21cron00:01:011
129412399532,36cyclictest1435412-21cron00:01:011
1294123994825,13cyclictest271ktimers/120:10:581
1294124994738,6cyclictest1296366-21/usr/sbin/munin19:15:562
1294122994736,7cyclictest0-21swapper/000:40:010
1294124994632,11cyclictest265-21systemd-journal19:55:012
1294122994636,5cyclictest0-21swapper/022:36:010
1294122994636,5cyclictest0-21swapper/022:36:010
1294124994537,5cyclictest1298644-21systemd-run19:25:012
1294123994537,5cyclictest1328640-21systemd-run21:05:011
1294124994434,6cyclictest1348605-21systemd-run21:40:022
1294123994435,5cyclictest1397455-21munin-plugin-st23:00:011
1294123994433,8cyclictest1330114-21munin-plugin-st21:10:001
1294123994432,9cyclictest1458587-21/usr/sbin/munin00:40:021
1294123994423,17cyclictest1002-21mta-sts-daemon23:05:551
129412499438,6cyclictest171rcu_preempt23:25:552
1294124994329,11cyclictest1364954-21needreboot22:05:522
129412399433,31cyclictest1343670-21ssh21:31:021
1294122994333,5cyclictest151ktimers/019:41:010
1294122994330,9cyclictest0-21swapper/021:50:530
1294122994330,9cyclictest0-21swapper/021:50:530
1294124994235,4cyclictest1455724-21latency_hist00:35:032
1294124994234,5cyclictest1333274-21latency_hist21:15:022
1294122994235,4cyclictest1424938-21sh23:45:010
1294122994235,4cyclictest1424938-21sh23:45:010
1294123994133,4cyclictest1003-21mta-sts-daemon22:52:141
1294123994122,14cyclictest271ktimers/123:25:551
1294124994028,9cyclictest1334635-21mailstats21:16:062
129412499402,30cyclictest1374188-21ssh22:20:532
1294123994033,4cyclictest1357740-21ssh21:55:001
1294123994033,4cyclictest1357740-21ssh21:55:001
1294123994028,9cyclictest1388316-21cut22:45:011
129412299403,31cyclictest1429299-21ssh23:51:010
129412299402,26cyclictest1368055-21ssh22:10:520
1294124993931,5cyclictest1434196-40systemctl00:00:022
1294124993924,8cyclictest1410918-21sh23:20:572
1294122993933,4cyclictest1387023-21unixbench_multi22:41:120
1294122993931,5cyclictest1331887-21unixbench_singl21:11:060
1294122993930,5cyclictest151ktimers/023:45:580
1294122993930,5cyclictest151ktimers/023:45:580
129412499382,32cyclictest1362075-21ssh22:01:002
1294124993823,11cyclictest3791945-21cups-browsed19:40:012
1294124993823,11cyclictest3791945-21cups-browsed19:40:012
1294123993831,3cyclictest0-21swapper/100:30:491
1294123993830,5cyclictest3791945-21cups-browsed22:35:471
1294123993830,5cyclictest3791945-21cups-browsed22:35:471
1294123993830,4cyclictest0-21swapper/122:05:551
1294123993829,5cyclictest1351652-21munin-plugin-st21:45:011
1294122993829,6cyclictest0-21swapper/023:20:010
1294122993828,6cyclictest151ktimers/021:45:550
1294124993729,5cyclictest1344133-21unixbench-2d21:31:122
1294124993729,4cyclictest1416150-21kworker/u8:2-xprtiod23:31:072
129412399374,4cyclictest1410882-21ssh23:20:561
1294123993730,3cyclictest0-21swapper/121:50:021
1294123993730,3cyclictest0-21swapper/121:15:591
1294123993728,5cyclictest1431812-21fschecks_time23:55:461
1294122993730,3cyclictest0-21swapper/019:11:170
1294122993729,4cyclictest1338155-21sshd21:21:170
1294124993628,5cyclictest1370923-21ls22:15:502
1294124993626,7cyclictest421-21dbus-daemon23:05:012
1294124993626,7cyclictest421-21dbus-daemon23:05:012
1294124993626,6cyclictest1383968-21head22:36:092
1294124993626,6cyclictest1383968-21head22:36:092
1294123993629,4cyclictest1397962-21aten_r2power_cu23:00:431
1294123993629,4cyclictest1397962-21aten_r2power_cu23:00:431
1294123993629,4cyclictest1370000-21munin-plugin-st22:15:011
1294123993628,5cyclictest1374812-21grep22:21:071
1294123993628,5cyclictest1339530-21latency_hist21:25:031
1294123993627,6cyclictest1450749-21proc_pri00:26:001
1294124993528,4cyclictest1366958-21kworker/u8:14-xprtiod22:30:592
1294124993528,3cyclictest0-21swapper/222:46:042
1294124993526,5cyclictest0-21swapper/221:20:582
1294124993526,4cyclictest0-21swapper/223:40:472
1294124993526,4cyclictest0-21swapper/223:40:472
1294124993525,6cyclictest1-21systemd21:05:012
1294123993529,4cyclictest1294121-21cyclictest23:11:081
1294123993527,5cyclictest1306624-21fschecks_count19:50:481
1294123993526,6cyclictest421-21dbus-daemon23:18:271
1294123993524,8cyclictest1324945-21ntp_kernel_err20:50:531
1294123993524,8cyclictest1298025-21ntp_kernel_pll_19:20:571
129412299353,26cyclictest1358862-21ssh21:55:510
1294122993528,4cyclictest0-21swapper/023:10:530
1294122993527,6cyclictest1413227-21aten_r2power_cu23:25:440
1294122993527,5cyclictest1328634-21systemd-run21:05:010
1294122993522,8cyclictest1443226-21sh00:14:470
1294124993427,4cyclictest1366958-21kworker/u8:14-rpciod00:05:512
1294124993427,4cyclictest1315113-21idleruntime-cro20:20:012
1294124993426,5cyclictest1397458-21munin-run23:00:012
1294124993424,7cyclictest1356185-21switchtime21:51:052
1294124993424,7cyclictest1356185-21switchtime21:51:052
1294123993427,4cyclictest1419052-21latency_hist23:35:031
1294123993426,5cyclictest420-21avahi-daemon23:41:041
1294123993426,5cyclictest420-21avahi-daemon23:41:041
1294123993426,5cyclictest1420396-21threads23:36:051
1294122993428,4cyclictest1348569-21munin-run21:40:010
1294122993427,5cyclictest1322606-21cron20:45:010
1294122993426,5cyclictest1000-21mta-sts-daemon21:15:520
1294122993424,6cyclictest151ktimers/022:51:020
129412299342,24cyclictest1401732-21ssh23:05:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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