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2026-04-04 - 08:25

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 Sat Apr 04, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1255589995748,6cyclictest1-21systemd21:40:012
125558799561,32cyclictest1292750-21ssh21:10:300
1255587995518,13cyclictest0-21swapper/023:00:370
1255587995518,13cyclictest0-21swapper/023:00:370
1255587995330,20cyclictest1315948-21sendmail21:40:010
1255587995228,16cyclictest151ktimers/023:05:350
1255587995224,4cyclictest1-21systemd21:20:010
1255589995143,5cyclictest1299771-21idleruntime-cro21:20:002
1255589995142,6cyclictest3496356-21cups-browsed21:20:312
125558799514,42cyclictest0-21swapper/019:25:300
1255587995138,4cyclictest1430191-21munin-plugin-st00:00:000
125558799501,25cyclictest1378407-21ssh22:55:370
1255589994739,5cyclictest1352703-21systemd-run22:25:012
1255588994739,5cyclictest1364914-21munin-run22:40:011
1255588994638,5cyclictest1398034-21aten_r2power_fr23:20:191
1255588994638,5cyclictest1328247-21ssh21:55:021
125558799464,23cyclictest1439579-21ssh00:10:340
1255587994624,3cyclictest0-21swapper/022:15:430
1255587994525,17cyclictest1349752-21ssh22:20:320
1255587994514,7cyclictest12350irq/32-eth021:40:360
1255589994436,5cyclictest1381906-21ssh23:00:242
1255589994436,5cyclictest1381906-21ssh23:00:242
1255587994433,7cyclictest151ktimers/019:15:280
1255587994433,7cyclictest151ktimers/019:15:280
1255587994421,7cyclictest1304903-21ssh21:25:300
1255589994335,5cyclictest1272144-21grep20:05:012
1255589994334,6cyclictest1402119-21aten_r2power_po23:25:202
1255588994336,3cyclictest0-21swapper/121:10:231
1255588994334,5cyclictest1291631-21diskmemload23:55:031
1255588994332,8cyclictest1430237-21sh00:00:011
1255588994332,7cyclictest421-21dbus-daemon23:18:101
1255587994331,9cyclictest1418391-21aten_r2power_cu23:45:200
1255589994234,5cyclictest421-21dbus-daemon23:50:022
1255589994233,6cyclictest1255586-21cyclictest23:38:592
1255588994237,3cyclictest0-21swapper/122:30:421
1255588994234,5cyclictest1285647-21systemd-run20:50:011
1255588994233,6cyclictest420-21avahi-daemon00:26:381
1255587994222,12cyclictest12350irq/32-eth000:00:330
1255589994133,5cyclictest1397519-21munin-plugin-st23:20:012
1255589994133,5cyclictest1266109-21systemd-run19:45:012
1255588994133,5cyclictest3496356-21cups-browsed23:37:591
1255588994133,5cyclictest1458692-21cron00:35:011
1255588994133,5cyclictest1446503-21munin-run00:20:011
1255588994133,5cyclictest1296452-21fschecks_time21:15:261
1255588994131,7cyclictest1291649-21ssh21:10:021
1255588994131,6cyclictest3496356-21cups-browsed21:59:031
1255588994131,6cyclictest3496356-21cups-browsed21:59:031
1255588994130,8cyclictest1258624-21sh19:20:011
1255588994130,8cyclictest1258624-21sh19:20:011
1255589994032,5cyclictest421-21dbus-daemon23:15:012
1255589994031,6cyclictest1291743-21latency_hist21:10:022
1255589994030,7cyclictest1354455-21unixbench_singl22:25:422
1255588994031,6cyclictest1353636-21missed_timers22:25:261
1255587994010,11cyclictest12350irq/32-eth022:30:290
1255589993934,3cyclictest0-21swapper/200:20:022
1255588993931,5cyclictest1460433-21unixbench_multi00:35:431
1255588993931,5cyclictest1313573-21unixbench-2d21:35:411
1255587993926,11cyclictest1-21systemd22:10:010
1255587993915,19cyclictest1451833-21ssh00:25:360
1255589993830,5cyclictest421-21dbus-daemon20:20:012
1255589993829,6cyclictest3496356-21cups-browsed23:51:012
1255589993829,5cyclictest1377130-21cron22:55:012
1255588993830,5cyclictest3496356-21cups-browsed22:46:041
1255588993823,11cyclictest421-21dbus-daemon21:40:311
125558799382,29cyclictest659-21snmpd19:55:290
1255589993732,2cyclictest0-21swapper/200:20:342
1255589993731,3cyclictest1055-21mta-sts-daemon21:27:302
1255589993731,3cyclictest0-21swapper/221:45:012
1255589993728,6cyclictest420-21avahi-daemon00:00:002
1255589993727,7cyclictest1341896-21mailstats22:10:402
1255588993729,5cyclictest1337091-21sshd22:05:231
1255588993729,5cyclictest1290209-21latency_hist21:05:021
1255588993729,5cyclictest1261522-21unixbench_singl19:25:401
1255588993728,6cyclictest439-21systemd-logind19:58:201
1255588993728,5cyclictest1-21systemd23:05:011
1255588993728,5cyclictest1-21systemd23:05:011
1255588993726,7cyclictest420-21avahi-daemon00:09:551
1255587993731,3cyclictest0-21swapper/019:40:010
1255587993728,6cyclictest420-21avahi-daemon00:06:140
1255587993728,6cyclictest1328208-21cron21:55:010
1255587993727,7cyclictest1410368-21cpu23:35:200
1255589993628,5cyclictest1434330-21ssh00:05:012
1255589993628,5cyclictest1332340-21sendmail22:00:012
1255589993628,5cyclictest1332340-21sendmail22:00:012
1255588993629,3cyclictest0-21swapper/120:40:291
1255588993628,5cyclictest420-21avahi-daemon19:50:271
1255588993627,6cyclictest421-21dbus-daemon21:30:011
1255588993627,6cyclictest1439660-21wc00:10:371
125558799364,25cyclictest659-21snmpd20:10:310
1255587993621,12cyclictest1450721-21latency_hist00:25:020
1255587993621,11cyclictest0-21swapper/022:00:330
125558799361,28cyclictest1402851-21ssh23:25:340
125558999354,28cyclictest1337685-21ssh22:05:372
1255589993527,5cyclictest3496356-21cups-browsed19:11:012
1255589993527,5cyclictest3496356-21cups-browsed19:11:012
1255589993527,5cyclictest1456268-21timerwakeupswit00:30:412
1255589993526,6cyclictest1-21systemd19:20:012
1255589993526,6cyclictest1-21systemd19:20:012
1255589993525,7cyclictest1055-21mta-sts-daemon22:42:222
1255589993524,8cyclictest1333936-21timerwakeupswit22:00:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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