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2026-07-10 - 17:37

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 Fri Jul 10, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
332050521000,3chrt75-21kworker/3:1-events12:20:113
30451572810,1sleep03045159-21sort07:45:000
32384472690,2sleep3481ktimers/310:55:143
30334142560,3sleep13008366-21cyclictest07:30:161
3008379995547,6cyclictest3008229-21kworker/u8:0+flush-8:008:10:261
3008379995447,5cyclictest1704890-21systemd-journal11:15:171
3008371995444,8cyclictest3239162-21ntpq10:55:170
3008379995040,8cyclictest3249172-21ntpq11:05:151
3008371995045,4cyclictest3226202-21kworker/u8:1+events_unbound10:50:080
3008371995044,4cyclictest3209801-21latency_hist10:30:010
3008379994943,4cyclictest3194351-21kworker/u8:1+flush-8:010:15:081
3008379994838,7cyclictest3338585-21ntpq12:35:161
3008371994839,7cyclictest3150065-21latency_hist09:30:000
3008371994741,4cyclictest3204637-21latency_hist10:25:010
3008379994640,5cyclictest3270478-21kworker/u8:0+flush-8:011:35:161
3008379994640,5cyclictest3270478-21kworker/u8:0+flush-8:011:35:161
3008379994638,6cyclictest3045421-21apt-get07:45:041
3008379994636,8cyclictest3045032-21cp07:45:011
3008371994637,7cyclictest3170140-21/usr/sbin/munin09:50:160
3008379994540,3cyclictest3035561-21kworker/u8:1+flush-8:008:45:101
3008383994436,6cyclictest3204635-21apt-get10:24:592
3008379994438,4cyclictest3099624-21kworker/u8:4+flush-8:009:30:101
3008371994435,6cyclictest3260047-21latency_hist11:20:000
3008379994339,3cyclictest3035561-21kworker/u8:1+events_unbound09:05:191
3008371994339,3cyclictest3240393-21kworker/u8:0+events_unbound11:10:180
3008379994237,3cyclictest3099624-21kworker/u8:4+flush-8:009:40:191
3008379994232,8cyclictest3269211-21ntpq11:25:161
3008371994239,2cyclictest3094557-21kworker/u8:0+flush-8:008:35:240
3008371994237,4cyclictest2176286-21kworker/u8:2+flush-8:007:25:090
3008371994233,7cyclictest1704890-21systemd-journal12:00:010
3008371994229,10cyclictest1704890-21systemd-journal11:40:000
3008371994229,10cyclictest1704890-21systemd-journal11:39:590
3008379994135,5cyclictest3094557-21kworker/u8:0+flush-8:008:35:051
3008379994134,5cyclictest3104007-21ntpq08:40:181
3008371994132,7cyclictest1704890-21systemd-journal11:09:370
3008383994031,7cyclictest3339518-21cron12:40:012
3008379994035,4cyclictest3226202-21kworker/u8:1+events_unbound11:20:171
3008379994034,3cyclictest3065332-21kworker/u8:2+flush-8:008:05:071
3008379994032,6cyclictest1704890-21systemd-journal10:01:161
3008371994035,3cyclictest3099624-21kworker/u8:4+events_unbound09:40:170
3008371994033,5cyclictest3120062-21apt-get09:00:010
3008371994031,7cyclictest1704890-21systemd-journal10:49:590
3008371994029,9cyclictest3140649-21diskstats09:20:070
3008379993929,8cyclictest3284150-21ntpq11:40:191
3008371993933,4cyclictest3226202-21kworker/u8:1+flush-8:011:25:080
3008379993833,4cyclictest3150693-21kworker/u8:2+flush-8:010:25:161
3008371993833,3cyclictest3150693-21kworker/u8:2+flush-8:009:55:240
3008371993830,6cyclictest3030280-21apt-get07:30:070
3008371993829,7cyclictest3210256-21/usr/sbin/munin10:30:170
300837199381,33cyclictest3199746-21unin-run10:19:590
3008371993731,4cyclictest3008229-21kworker/u8:0+flush-8:007:45:090
3008371993731,4cyclictest2176286-21kworker/u8:2+flush-8:007:15:240
3008371993729,6cyclictest1704890-21systemd-journal12:19:000
3008371993728,7cyclictest3285287-21/usr/sbin/munin11:45:150
3008379993631,4cyclictest3065332-21kworker/u8:2+flush-8:008:15:211
3008379993631,3cyclictest3008229-21kworker/u8:0+flush-8:007:25:251
3008379993630,5cyclictest3309480-21kworker/u8:2+flush-8:012:25:151
3008379993630,4cyclictest3035561-21kworker/u8:1+events_unbound08:25:091
3008379993629,5cyclictest3150693-21kworker/u8:2+events_unbound10:05:071
3008379993627,7cyclictest3215021-21apt-get10:35:001
3008379993627,6cyclictest1704890-21systemd-journal07:17:001
3008371993632,3cyclictest3220684-21kworker/u8:3+events_unbound12:10:010
3008371993631,4cyclictest2976073-21kworker/u8:3+flush-8:007:35:260
3008371993631,3cyclictest3226202-21kworker/u8:1+events_unbound11:20:230
3008371993530,4cyclictest2176286-21kworker/u8:2+flush-8:007:20:100
3008379993429,4cyclictest3220684-21kworker/u8:3+events_unbound11:45:181
3008379993429,3cyclictest3146057-21irqrtprio09:25:111
3008379993429,3cyclictest2176286-21kworker/u8:2+events_unbound07:10:071
3008379993428,4cyclictest3150693-21kworker/u8:2+events_unbound09:45:161
3008379993427,5cyclictest1704890-21systemd-journal11:56:161
3008379993426,6cyclictest3235171-21latency_hist10:55:001
3008379993424,8cyclictest3114876-21apt-get08:55:001
3008379993423,9cyclictest3159143-21ntpq09:35:181
3008371993424,8cyclictest3060306-21/usr/sbin/munin08:00:170
3008379993330,2cyclictest3084911-21systemd-run08:25:001
3008379993320,10cyclictest1704890-21systemd-journal09:11:161
3008371993329,3cyclictest3145102-21kworker/u8:1+flush-8:009:30:260
3008371993328,4cyclictest3065332-21kworker/u8:2+flush-8:008:25:230
3008371993327,4cyclictest2976073-21kworker/u8:3+flush-8:007:10:200
3008371993324,6cyclictest3304855-21latency_hist12:05:020
3008379993228,3cyclictest3008229-21kworker/u8:0+events_unbound07:20:181
3008379993227,4cyclictest3099624-21kworker/u8:4+flush-8:009:20:091
3008379993226,5cyclictest3065332-21kworker/u8:2+events_unbound09:00:251
3008379993225,5cyclictest1704890-21systemd-journal11:31:171
30079922324,9sleep20-21swapper/207:07:282
3008379993127,3cyclictest3309480-21kworker/u8:2+flush-8:012:30:101
3008379993127,3cyclictest3169933-21kworker/u8:0+flush-8:010:10:221
3008379993126,4cyclictest3194351-21kworker/u8:1+events_unbound10:20:201
3008379993126,3cyclictest3170885-21irqrtprio09:50:111
3008379993123,6cyclictest3120069-21latency_hist09:00:001
3008379993122,6cyclictest1704890-21systemd-journal07:51:171
3008371993126,4cyclictest3220684-21kworker/u8:3+flush-8:011:40:250
3008371993125,4cyclictest3065332-21kworker/u8:2+events_unbound08:15:080
3008371993124,5cyclictest3329209-21grep12:25:240
3008371993123,6cyclictest1704890-21systemd-journal09:50:000
3008383993026,2cyclictest3290527-21fschecks_count11:50:072
3008383993026,2cyclictest3170430-21fschecks_count09:50:082
3008383993026,2cyclictest3100284-21aten2_r5power_c08:40:052
3008383993022,6cyclictest1704890-21systemd-journal09:05:012
3008379993025,4cyclictest2976073-21kworker/u8:3+events_unbound07:35:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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