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2026-06-16 - 04:59

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 Jun 16, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1284955995948,7cyclictest1427483-21cups-browsed00:15:302
1284954995243,6cyclictest1427483-21cups-browsed00:07:471
1284955994843,2cyclictest0-21swapper/221:15:262
1284953994828,13cyclictest151ktimers/020:50:300
1284953994635,5cyclictest0-21swapper/022:50:260
128495399452,38cyclictest1331454-21ssh21:25:280
1284955994436,5cyclictest439-21systemd-logind20:20:012
1284955994316,25cyclictest351ktimers/221:40:342
128495499434,5cyclictest171rcu_preempt22:30:291
1284955994234,5cyclictest265-21systemd-journal21:05:012
1284954994235,4cyclictest1001-21mta-sts-daemon19:55:331
1284954994234,5cyclictest1389847-21cron23:00:011
1284954994234,5cyclictest1364828-21cron22:20:001
1284953994228,12cyclictest1320937-21diskmemload21:30:330
1284953994218,16cyclictest151ktimers/019:15:280
1284955994133,5cyclictest1364884-21systemd-run22:20:012
1284955994131,7cyclictest1346108-21ssh21:50:012
1284954994133,5cyclictest421-21dbus-daemon00:00:031
1284953994131,5cyclictest151ktimers/023:45:330
1284953994130,6cyclictest151ktimers/023:00:280
128495399412,33cyclictest3759903-21cups-browsed21:00:250
1284955994027,6cyclictest1002-21mta-sts-daemon22:10:282
1284954994032,4cyclictest0-21swapper/123:30:321
1284953994031,4cyclictest1365294-21aten_r2power_po22:20:170
1284953994021,14cyclictest12650irq/32-eth023:05:290
1284955993930,5cyclictest1411755-21systemd-run23:35:012
1284954993928,7cyclictest1001-21mta-sts-daemon21:55:251
1284953993933,3cyclictest0-21swapper/022:45:330
1284953993932,5cyclictest1427387-21unin-run00:00:020
1284953993931,4cyclictest0-21swapper/022:55:270
128495599383,31cyclictest1387765-21ssh22:55:292
1284954993831,4cyclictest1367966-21cron22:25:001
1284954993831,4cyclictest1324086-21cron21:15:011
1284954993831,4cyclictest1287858-21unixbench_singl19:15:381
1284954993830,5cyclictest1316428-21debian-sa120:55:011
1284954993829,5cyclictest1305937-21munin-plugin-st20:20:011
1284953993832,3cyclictest0-21swapper/021:55:240
1284953993830,5cyclictest1372285-21proc_pri22:30:330
1284953993829,6cyclictest1409721-21ssh23:30:320
128495599374,28cyclictest1419053-21ssh23:45:322
128495599373,30cyclictest1378384-21ssh22:40:292
1284955993729,5cyclictest265-21systemd-journal19:15:012
1284955993729,5cyclictest1322565-21unixbench_singl21:10:382
1284955993729,5cyclictest1317913-21cron21:00:012
1284955993728,5cyclictest1-21systemd00:40:022
1284955993727,8cyclictest1315737-21needreboot20:50:232
128495499373,25cyclictest1340984-21ssh21:40:371
1284954993725,9cyclictest1450813-21unixbench_multi00:35:421
128495499372,28cyclictest1359650-21ssh22:10:281
1284953993728,3cyclictest151ktimers/020:20:250
1284955993629,3cyclictest0-21swapper/223:35:282
1284955993627,6cyclictest420-21avahi-daemon23:01:312
1284955993627,6cyclictest1396102-21grep23:10:012
1284955993625,7cyclictest3759900-21cupsd22:35:162
1284955993625,7cyclictest1353254-21needreboot22:00:212
128495499363,25cyclictest1444111-21ssh00:25:311
1284954993629,4cyclictest1424200-21cron23:55:011
1284954993628,5cyclictest420-21avahi-daemon23:13:381
1284954993628,5cyclictest1400824-21unixbench_singl23:15:381
128495499361,25cyclictest1331491-21ssh21:25:301
1284953993625,8cyclictest3759900-21cupsd20:15:260
1284953993618,11cyclictest151ktimers/019:30:240
1284955993528,4cyclictest421-21dbus-daemon20:05:012
1284955993527,5cyclictest1425769-21tail23:55:372
1284955993527,5cyclictest1405601-21latency_hist23:25:022
128495599352,24cyclictest1347136-21ssh21:50:292
1284955993514,17cyclictest351ktimers/222:20:292
1284954993528,4cyclictest1347656-21tail21:50:381
1284954993523,9cyclictest1438158-21timerandwakeup00:15:411
128495399353,24cyclictest665-21snmpd19:55:260
128495599343,25cyclictest1356547-21ssh22:05:302
128495599343,25cyclictest1356547-21ssh22:05:302
1284955993426,5cyclictest1399222-21munin-plugin-st23:15:012
1284955993426,5cyclictest1292442-21munin-plugin-st19:35:002
1284955993425,4cyclictest0-21swapper/200:20:282
1284954993426,5cyclictest1393096-21date23:05:021
1284953993428,4cyclictest1416421-21unixbench_multi23:40:360
1284953993426,5cyclictest1338360-21unixbench_singl21:35:390
1284953993424,6cyclictest1364875-21kworker/u8:10+nfsiod22:35:250
128495599333,6cyclictest171rcu_preempt22:30:292
128495599333,24cyclictest1337889-21sh21:35:332
1284955993326,4cyclictest1328826-21unixbench_multi21:20:382
1284955993325,5cyclictest1303468-21fschecks_time20:10:252
1284955993325,5cyclictest1289458-21ls19:25:012
1284955993322,8cyclictest1334629-21ntp_offset21:30:292
128495499332,5cyclictest171rcu_preempt21:30:241
1284954993325,5cyclictest265-21systemd-journal22:40:011
1284954993325,5cyclictest1285465-21fschecks_time19:10:191
1284954993324,6cyclictest3759903-21cups-browsed22:54:111
128495499332,22cyclictest1381495-21ssh22:45:281
128495499331,23cyclictest1353407-21ssh22:00:271
1284953993327,3cyclictest0-21swapper/022:20:010
128495399332,25cyclictest1400404-21ssh23:15:330
1284953993317,12cyclictest12650irq/32-eth020:35:270
128495399331,28cyclictest0-21swapper/000:25:260
1284955993225,4cyclictest1422125-21ntp_kernel_pll_23:50:272
1284955993225,4cyclictest1369164-21proc_pri22:25:332
1284955993224,5cyclictest1385179-21unixbench_multi22:50:372
1284955993222,7cyclictest1314573-21sshd20:45:342
1284955993222,5cyclictest0-21swapper/200:30:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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