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2026-07-31 - 01:07

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 Thu Jul 30, 2026 12:43:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1180427995445,7cyclictest1245343-21sh09:55:560
1180427995042,5cyclictest1271521-21munin-run10:40:010
118042999474,36cyclictest1312324-21ssh11:45:482
118042999474,36cyclictest1312324-21ssh11:45:482
1180429994631,7cyclictest1318644-21mailstats11:55:572
1180427994639,4cyclictest1220648-21ssh09:15:500
118042999455,32cyclictest1272690-21ssh10:40:492
118042999455,32cyclictest1272690-21ssh10:40:492
1180427994538,4cyclictest1320298-21ssh12:00:010
1180429994334,6cyclictest1271521-21munin-run10:40:012
1180428994332,8cyclictest1308111-21idleruntime-cro11:40:011
1180427994332,9cyclictest1278617-21missed_timers10:50:470
1180427994332,9cyclictest1278617-21missed_timers10:50:470
1180429994235,4cyclictest1195528-21kworker/u8:1-rpciod08:15:012
1180429994234,5cyclictest1280677-21cron10:55:002
1180429994234,5cyclictest1280677-21cron10:55:002
1180428994229,9cyclictest1271540-21idleruntime-cro10:40:011
1180429994133,5cyclictest1-21systemd10:00:012
1180429994032,5cyclictest421-21dbus-daemon12:15:012
1180429994032,5cyclictest1326485-21latency_hist12:10:022
1180429994032,5cyclictest1268488-21munin-plugin-st10:35:012
1180429994031,6cyclictest427-21polkitd12:05:012
1180429994027,9cyclictest1-21systemd09:15:372
118042899405,28cyclictest1217617-21ssh09:10:531
1180428994032,5cyclictest421-21dbus-daemon08:25:011
1180428994032,5cyclictest1253395-21latency_hist10:10:021
1180428994028,6cyclictest1312299-21sh11:45:471
1180428994028,6cyclictest1312299-21sh11:45:471
1180427994033,4cyclictest1298979-21cron11:25:010
1180427994032,5cyclictest1332731-21latency_hist12:20:030
118042999393,27cyclictest1233040-21ssh09:35:522
1180429993931,5cyclictest1281534-21kernelversion10:55:412
1180428993931,5cyclictest1274584-21cron10:45:001
1180428993931,5cyclictest1274584-21cron10:45:001
1180428993931,5cyclictest1205923-21systemd-run08:35:011
1180427993933,3cyclictest0-21swapper/011:50:010
1180427993933,3cyclictest0-21swapper/011:50:010
1180427993932,4cyclictest1000-21mta-sts-daemon11:00:560
1180427993931,5cyclictest1216427-21systemd-run09:10:020
1180427993928,8cyclictest1295922-21idleruntime-cro11:20:010
1180429993829,6cyclictest265-21systemd-journal09:33:152
1180429993829,6cyclictest265-21systemd-journal09:33:152
1180427993830,5cyclictest1218045-21ssh09:11:020
1180427993829,6cyclictest485-21in:imuxsock07:50:010
118042799382,31cyclictest1266572-21ssh10:30:500
1180427993822,12cyclictest0-21swapper/010:45:020
1180427993822,12cyclictest0-21swapper/010:45:020
1180429993729,5cyclictest1262381-21cron10:25:012
1180429993729,5cyclictest1247845-21cut10:00:392
1180429993729,5cyclictest1184941-21systemd-run07:25:012
1180429993727,6cyclictest600-21gdbus09:27:012
1180429993727,6cyclictest600-21gdbus09:27:012
1180429993726,8cyclictest1190934-21sh07:45:012
1180428993731,4cyclictest1283743-21munin-run11:00:011
1180428993730,3cyclictest0-21swapper/110:10:381
1180428993729,5cyclictest1194436-21fschecks_time07:55:421
1180428993728,6cyclictest1318916-21unixbench-2d11:56:011
1180428993728,6cyclictest1216403-21munin-run09:10:011
1180428993728,6cyclictest1207393-21idleruntime-cro08:40:001
1180428993728,6cyclictest1207393-21idleruntime-cro08:40:001
1180428993727,7cyclictest1244995-21latency09:55:451
1180428993726,8cyclictest1321526-21ntp_offset12:00:531
1180427993729,5cyclictest1223310-21fschecks_count09:20:430
1180427993723,10cyclictest151ktimers/012:30:510
1180429993630,3cyclictest0-21swapper/207:20:012
1180428993630,3cyclictest0-21swapper/107:55:011
1180428993627,6cyclictest1-21systemd10:30:011
1180428993626,8cyclictest1183411-21/usr/sbin/munin07:20:011
118042799365,29cyclictest1209810-21kworker/0:0+events_power_efficient08:45:530
118042799363,29cyclictest1229978-21ssh09:30:530
118042799363,29cyclictest1229978-21ssh09:30:530
1180427993628,5cyclictest1325071-21unixbench_multi12:06:000
1180427993626,7cyclictest389646-21cups-browsed12:00:180
1180427993626,7cyclictest1-21systemd09:27:010
1180427993626,7cyclictest1-21systemd09:27:010
1180427993624,9cyclictest1216400-21diskmemload10:26:000
1180427993623,10cyclictest1259334-21munin-run10:20:010
1180427993620,13cyclictest0-21swapper/012:25:380
1180429993528,4cyclictest1250911-21fschecks_count10:05:412
1180429993528,4cyclictest1208899-21cron08:45:002
1180429993528,4cyclictest1208899-21cron08:45:002
1180429993528,4cyclictest1206219-21kworker/u8:6-xprtiod09:00:012
1180429993527,5cyclictest389646-21cups-browsed07:50:412
1180429993526,6cyclictest567-21gdbus08:05:542
1180428993527,5cyclictest1250180-21cron10:05:011
1180428993527,5cyclictest1208902-21cron08:45:001
1180428993527,5cyclictest1208902-21cron08:45:001
1180428993527,5cyclictest1186406-21cron07:30:011
1180428993526,6cyclictest1292875-21cron11:15:011
1180428993524,7cyclictest421-21dbus-daemon10:35:021
118042799353,29cyclictest1306145-21ssh11:35:450
1180427993529,4cyclictest1232590-21fschecks_time09:35:420
1180427993529,3cyclictest0-21swapper/011:45:000
1180427993529,3cyclictest0-21swapper/011:45:000
1180427993522,9cyclictest0-21swapper/010:20:390
1180427993520,11cyclictest0-21swapper/011:30:440
118042999349,22cyclictest1002-21mta-sts-daemon11:30:502
118042999345,22cyclictest389643-21cupsd11:05:492
1180429993428,3cyclictest0-21swapper/209:15:012
1180429993427,4cyclictest1338799-21ssh12:30:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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