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2026-06-10 - 14:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Wed Jun 10, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
127153422400,3sleep3471rcuc/312:10:333
12367032980,2sleep375-21kworker/3:1-events11:35:013
11619852740,3chrt75-21kworker/3:1+events10:20:003
9874672690,2sleep3471rcuc/307:20:473
9890852580,2sleep3451irq_work/307:25:373
9890852580,2sleep3451irq_work/307:25:363
971105995534,18cyclictest1087794-21/usr/sbin/munin09:05:461
971105995234,16cyclictest1206909-21apt-get11:05:281
971103995241,9cyclictest975069-21ntpq07:10:430
12857732500,5sleep20-21swapper/212:20:462
971105994939,8cyclictest1006780-21ntpq07:40:421
971105994738,7cyclictest1155892-21ntpq10:10:411
971105994737,8cyclictest1260453-21ntpq11:55:441
971105994735,9cyclictest1280185-21ntpq12:15:441
971105994626,18cyclictest1704890-21systemd-journal09:17:001
971105994626,18cyclictest1704890-21systemd-journal09:17:001
971105994534,8cyclictest1704890-21systemd-journal11:01:511
971105994530,13cyclictest1290268-21ntpq12:25:411
971103994433,8cyclictest1240593-21ntpq11:35:420
971105994334,7cyclictest1042455-21cp08:20:011
971105994334,7cyclictest1021629-21ntpq07:55:411
971105994334,6cyclictest1176893-21latency_hist10:35:011
971105994321,19cyclictest1236289-21latency_hist11:35:001
971105994224,16cyclictest1086411-21ntpq09:00:411
971103994034,4cyclictest1037605-21kworker/u8:1+flush-8:009:40:470
971103994033,5cyclictest1246714-21/usr/sbin/munin11:45:420
971103994033,4cyclictest988138-21apt-get07:25:290
971103994033,4cyclictest988138-21apt-get07:25:290
971103994032,6cyclictest1231582-21/usr/sbin/munin11:30:440
971103994029,8cyclictest1096636-21ntpq09:10:420
971103993931,5cyclictest1231342-21true11:30:000
971105993830,6cyclictest1201663-21latency_hist11:00:011
971105993830,6cyclictest1201663-21latency_hist11:00:001
971105993823,13cyclictest1097535-21munin-run09:14:591
971105993818,2cyclictest0-21swapper/107:35:481
971105993817,5cyclictest1704890-21systemd-journal09:40:011
971103993829,6cyclictest1002693-21latency_hist07:40:020
9700442383,30sleep30-21swapper/307:06:113
971105993729,6cyclictest1704890-21systemd-journal10:55:001
971105993727,7cyclictest1704890-21systemd-journal08:00:511
971105993720,15cyclictest0-21swapper/109:50:011
971105993719,15cyclictest0-21swapper/110:05:441
971105993626,8cyclictest1126253-21ntpq09:40:391
971105993620,14cyclictest1166983-21ls10:25:011
971105993617,2cyclictest0-21swapper/108:55:001
971105993616,2cyclictest0-21swapper/107:25:401
971105993616,2cyclictest0-21swapper/107:25:401
971103993632,3cyclictest137713-21kworker/u8:2+events_unbound08:00:360
971103993627,7cyclictest1032122-21kworker/u8:0+flush-8:008:10:340
971103993626,8cyclictest1117802-21diskstats09:35:300
971105993528,5cyclictest1031605-21ntpq08:05:441
971105993521,12cyclictest0-21swapper/112:39:591
971105993519,14cyclictest1116903-21unixbench_singl09:30:481
971105993519,14cyclictest0-21swapper/108:55:311
971105993518,15cyclictest987872-21systemd-run07:24:591
971105993517,2cyclictest0-21swapper/108:35:411
971105993517,2cyclictest0-21swapper/108:30:341
971105993517,2cyclictest0-21swapper/108:20:341
971105993517,2cyclictest0-21swapper/107:50:441
971105993516,2cyclictest0-21swapper/111:50:311
971105993516,2cyclictest0-21swapper/109:50:371
971105993515,4cyclictest0-21swapper/112:20:391
971103993526,6cyclictest1704890-21systemd-journal11:00:370
971103993525,8cyclictest1190848-21ntpq10:45:410
9706762353,9sleep10-21swapper/107:07:011
11149072350,5sleep3451irq_work/309:30:373
971105993425,7cyclictest1160866-21ntpq10:15:401
971105993418,2cyclictest0-21swapper/111:45:501
971105993417,2cyclictest0-21swapper/111:20:471
971105993415,7cyclictest1216753-21apt-get11:15:281
971103993429,3cyclictest1087352-21systemd-run09:05:000
971103993427,5cyclictest1255430-21ntpq11:50:420
971105993326,5cyclictest1111971-21grep09:25:491
971105993318,2cyclictest976127-21sed07:15:011
971105993317,2cyclictest0-21swapper/112:10:331
971103993327,4cyclictest1175957-21ntpq10:30:390
971103993326,4cyclictest1016663-21ntpq07:50:430
971103993323,8cyclictest1195817-21ntpq10:50:430
971103993323,8cyclictest1076549-21ntpq08:50:430
97110599329,9cyclictest1137324-21apt-get09:55:291
971105993228,2cyclictest1036412-21needreboot08:10:411
971105993224,6cyclictest1211841-21apt-get11:10:281
971105993218,1cyclictest0-21swapper/107:20:001
971105993216,2cyclictest0-21swapper/110:40:391
971103993228,2cyclictest1197931-21kthreadcore10:55:360
971103993228,2cyclictest1197931-21kthreadcore10:55:350
971103993227,4cyclictest137713-21kworker/u8:2+flush-8:008:40:550
971103993224,6cyclictest1286237-21latency_hist12:25:010
971103993224,6cyclictest1245573-21ntpq11:40:420
971103993123,6cyclictest1081439-21ntpq08:55:400
9708722313,22sleep00-21swapper/007:09:340
971108993025,3cyclictest1057503-21kworker/u8:3+flush-8:009:35:472
971105993018,9cyclictest1704890-21systemd-journal11:27:521
971105993011,6cyclictest1704890-21systemd-journal12:04:591
971103993021,7cyclictest1171032-21ntpq10:25:390
971103993020,8cyclictest1051891-21ntpq08:25:450
971103993019,9cyclictest1266770-21diskstats12:05:320
971103993019,8cyclictest1281045-21apt-get12:20:000
971108992925,3cyclictest1037605-21kworker/u8:1+flush-8:008:15:432
971108992924,3cyclictest1057212-21unixbench_singl08:30:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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