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2026-04-24 - 19:49

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 Apr 24, 2026 12:43:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1221971996153,5cyclictest1306683-21systemd-run10:10:012
122197199583,31cyclictest1328344-21ssh10:35:502
122197199583,31cyclictest1328344-21ssh10:35:502
1221971995828,6cyclictest411063-21cups-browsed09:55:572
122197199565,30cyclictest1324179-21ssh10:30:442
1221970995445,4cyclictest0-21swapper/110:50:411
1221970995344,5cyclictest1247474-21systemd-run08:35:011
1221970995344,5cyclictest1247474-21systemd-run08:35:011
1221969995325,19cyclictest151ktimers/007:25:400
1221969995325,19cyclictest151ktimers/007:25:400
1221970995242,7cyclictest411063-21cups-browsed08:25:011
1221970995242,7cyclictest411063-21cups-browsed08:25:011
122196999523,42cyclictest1263404-21ssh09:15:470
1221969995031,17cyclictest1223469-21kworker/u8:7-events_unbound08:55:400
1221970994840,5cyclictest1391500-21latency_hist11:55:021
1221969994834,9cyclictest0-21swapper/010:55:590
1221970994738,5cyclictest0-21swapper/110:25:411
1221969994737,6cyclictest1270235-21latency_hist09:25:020
1221969994737,6cyclictest1270235-21latency_hist09:25:020
1221971994531,11cyclictest1348621-21switchtime11:00:532
1221971994519,20cyclictest1404880-21sh12:10:462
122197099453,30cyclictest1421024-21ssh12:30:481
1221969994536,6cyclictest1335734-21fschecks_time10:45:350
1221969994535,4cyclictest0-21swapper/009:10:420
1221969994523,15cyclictest151ktimers/007:20:420
1221971994437,4cyclictest0-21swapper/210:40:442
1221971994437,4cyclictest0-21swapper/210:40:442
1221971994425,15cyclictest1257946-21diskmemload10:20:392
1221969994433,7cyclictest411063-21cups-browsed10:14:410
1221971994336,4cyclictest1056-21mta-sts-daemon09:12:432
1221970994337,3cyclictest0-21swapper/110:45:001
1221970994337,3cyclictest0-21swapper/110:45:001
1221970994335,5cyclictest1379260-21basename11:40:011
1221970994316,19cyclictest0-21swapper/109:25:451
1221969994334,6cyclictest411063-21cups-browsed12:00:010
1221969994333,6cyclictest1291666-21ntp_kernel_err09:50:390
122196999431,36cyclictest1279700-21ssh09:35:480
1221971994234,5cyclictest1257946-21diskmemload11:25:372
1221971994233,6cyclictest1388006-21aten_r2power_vo11:50:322
1221971994231,7cyclictest1230972-21sendmail07:40:012
1221970994237,2cyclictest0-21swapper/112:20:011
1221970994233,6cyclictest1304452-21tail10:05:531
1221970994232,6cyclictest0-21swapper/110:15:001
1221970994231,7cyclictest411063-21cups-browsed11:16:111
1221970994230,8cyclictest1278317-21sh09:35:011
1221969994233,6cyclictest420-21avahi-daemon12:29:470
1221971994134,3cyclictest0-21swapper/212:25:432
1221970994134,4cyclictest0-21swapper/111:25:011
1221970994132,6cyclictest421-21dbus-daemon10:35:371
1221970994132,6cyclictest421-21dbus-daemon10:35:371
1221970994132,6cyclictest1416686-21needreboot12:25:381
1221970994132,5cyclictest1286449-21munin-plugin-st09:45:011
1221970994116,8cyclictest1384122-21ssh11:45:361
1221970994116,7cyclictest1281895-21sh09:39:041
1221969994134,4cyclictest1367280-21latency_hist11:25:020
1221969994133,6cyclictest1054-21mta-sts-daemon12:34:320
1221969994133,5cyclictest1413392-21unixbench-2d12:21:000
1221969994131,5cyclictest1286469-21kworker/u8:12-rpciod09:55:430
1221969994131,5cyclictest0-21swapper/012:15:520
1221969994128,9cyclictest1401146-21threads12:05:520
1221969994128,7cyclictest0-21swapper/011:05:400
122196999412,31cyclictest1348322-21ssh11:00:450
1221971994032,5cyclictest1-21systemd12:25:012
1221971994029,7cyclictest420-21avahi-daemon10:49:242
1221970994032,5cyclictest1399510-21munin-plugin-st12:05:011
1221970994032,5cyclictest1399510-21munin-plugin-st12:05:011
1221970994031,6cyclictest1-21systemd11:15:021
1221970994031,6cyclictest1-21systemd11:15:021
1221970994029,8cyclictest695-21cron09:05:011
1221970994022,13cyclictest1368577-21ps11:25:481
1221970994016,7cyclictest1236327-21ntpq07:55:411
1221969994034,4cyclictest12350irq/32-eth008:01:040
1221969994031,5cyclictest0-21swapper/009:35:010
1221969994010,22cyclictest1384541-21ssh11:45:430
122197199393,32cyclictest1283598-21ssh09:40:432
1221971993932,4cyclictest1352876-21unixbench_multi11:05:542
1221971993931,4cyclictest1237030-21latency_hist08:00:022
1221970993931,5cyclictest1257946-21diskmemload10:45:361
1221970993931,5cyclictest1254971-21systemd-run09:00:011
1221970993928,8cyclictest1352393-21ntpq11:05:461
1221970993926,8cyclictest1245344-21ntpq08:25:411
1221970993926,8cyclictest1239310-21ntpq08:05:401
1221970993924,9cyclictest1248363-21ntpq08:35:421
1221970993924,9cyclictest1248363-21ntpq08:35:421
1221970993915,8cyclictest1288815-21sh09:46:471
1221970993911,8cyclictest1382587-21ssh11:43:401
1221969993930,5cyclictest1284718-21sshd09:41:430
1221969993926,9cyclictest1-21systemd10:50:300
1221969993925,9cyclictest0-21swapper/007:30:420
1221971993832,3cyclictest0-21swapper/212:40:012
1221971993830,5cyclictest411063-21cups-browsed09:35:012
1221971993830,3cyclictest0-21swapper/211:40:462
1221971993825,8cyclictest0-21swapper/209:45:442
122197199382,31cyclictest1376373-21ssh11:35:402
122197099383,26cyclictest1312037-21ssh10:15:441
1221970993832,3cyclictest0-21swapper/111:00:011
1221970993831,3cyclictest0-21swapper/110:00:011
1221970993825,8cyclictest1227421-21ntpq07:25:441
1221970993825,8cyclictest1227421-21ntpq07:25:441
1221970993824,8cyclictest1242403-21ntpq08:15:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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