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2025-11-17 - 04:33

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 Mon Nov 17, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2613175996353,7cyclictest2901849-21ntpq23:56:280
2613178996042,15cyclictest2923113-21apt-get00:21:181
26469612580,3chrt0-21swapper/019:41:280
26631102550,3chrt0-21swapper/119:56:261
2613178995543,9cyclictest2714159-21apt-get20:50:001
2613178995543,9cyclictest2714159-21apt-get20:50:001
2613178995537,15cyclictest2773091-21ntpq21:46:301
2613178995344,6cyclictest282-21systemd-journal23:51:491
261317599531,48cyclictest1-21systemd23:39:590
2613178995243,6cyclictest2917837-21latency_hist00:15:011
2613178994838,8cyclictest282-21systemd-journal23:40:001
2613175994636,7cyclictest2674416-21latency_hist20:10:010
2613178994538,5cyclictest2789272-21/usr/sbin/munin22:06:281
2613175994533,9cyclictest282-21systemd-journal22:00:000
2613175994437,5cyclictest1769938-21kworker/u8:3+flush-8:019:20:010
2613175994433,8cyclictest2625013-21kworker/u8:1+flush-8:020:01:190
2613178994328,12cyclictest282-21systemd-journal22:55:011
2613178994328,12cyclictest282-21systemd-journal00:16:181
2613178994328,12cyclictest282-21systemd-journal00:16:181
2613175994333,7cyclictest282-21systemd-journal21:55:000
2613178994231,9cyclictest282-21systemd-journal00:40:001
2613175994236,4cyclictest2674760-21apt-get20:11:150
2613178994120,18cyclictest2848270-21latency_hist23:05:011
2613175994131,7cyclictest2893467-21diskstats23:51:180
2613178994034,5cyclictest1769938-21kworker/u8:3+flush-8:022:41:491
2613178994026,12cyclictest2908308-21apt-get00:06:151
2613175994030,7cyclictest282-21systemd-journal20:21:490
2613175993935,3cyclictest1769938-21kworker/u8:3+flush-8:022:26:230
2613175993932,5cyclictest2625013-21kworker/u8:1+flush-8:020:16:330
2613178993829,7cyclictest2862194-21ntpq23:16:291
2613178993828,8cyclictest2901883-21ntpq23:56:281
2613178993828,8cyclictest2735009-21diskstats21:11:221
2613175993832,4cyclictest1769938-21kworker/u8:3+flush-8:023:31:280
2613175993831,5cyclictest2887902-21latency_hist23:45:010
2613175993829,6cyclictest2853496-21/usr/sbin/munin23:11:310
2613178993731,4cyclictest2625013-21kworker/u8:1+flush-8:019:26:331
2613175993732,3cyclictest1769938-21kworker/u8:3+flush-8:000:21:380
2613175993726,7cyclictest282-21systemd-journal23:00:010
261317599370,31cyclictest1206777-21kworker/0:1+events19:35:120
28160422360,2sleep3481ktimers/322:31:263
28160422360,2sleep3481ktimers/322:31:263
2613178993629,5cyclictest282-21systemd-journal20:31:501
2613178993624,10cyclictest2818566-21cron22:35:001
2613178993624,10cyclictest2818566-21cron22:35:001
2613175993627,6cyclictest2937567-21latency_hist00:35:010
260839323625,8sleep20-21swapper/219:05:112
2613178993524,9cyclictest2622537-21kthreadcore19:16:241
2613178993513,19cyclictest2753341-21ntpq21:26:311
261317599352,29cyclictest2818600-21kworker/0:2+events23:15:560
261317599351,30cyclictest2818600-21kworker/0:2+events22:40:040
261317599350,30cyclictest2818600-21kworker/0:2+events23:05:080
2613181993429,3cyclictest1769938-21kworker/u8:3+flush-8:019:11:362
2613181993425,7cyclictest282-21systemd-journal23:30:002
2613178993425,7cyclictest2645390-21diskstats19:41:221
2613178993416,15cyclictest282-21systemd-journal21:17:501
261317599343,30cyclictest2778963-21kworker/0:1+events22:03:280
2613175993428,4cyclictest2907970-21munin-plugin-st00:05:000
2613175993426,6cyclictest282-21systemd-journal20:43:090
2613175993424,8cyclictest2634033-21ntpq19:26:260
261317599341,30cyclictest1-21systemd19:35:010
261317899333,6cyclictest0-21swapper/120:16:151
2613178993328,3cyclictest2720219-21fschecks_time20:56:181
2613178993324,7cyclictest282-21systemd-journal21:44:501
261317899332,23cyclictest2650094-21apt-get19:46:151
2613175993327,4cyclictest2261296-21kworker/u8:0+flush-8:021:11:200
261317599331,31cyclictest2694423-21kworker/0:1+events20:49:200
261317599331,31cyclictest2694423-21kworker/0:1+events20:49:200
2613175993310,18cyclictest2788990-21kworker/0:0+events22:15:560
261317599330,27cyclictest2719469-21kworker/0:0+events21:35:440
261317899324,2cyclictest0-21swapper/122:26:151
2613178993222,8cyclictest2852274-21needreboot23:06:291
2613178993212,15cyclictest421rcuog/219:21:251
261317599328,19cyclictest2694423-21kworker/0:1+events20:35:040
2613175993227,3cyclictest2625013-21kworker/u8:1+events_unbound20:56:220
261317599321,30cyclictest2818600-21kworker/0:2+events23:27:440
261317599321,30cyclictest1206777-21kworker/0:1+events19:59:440
261317599321,30cyclictest1206777-21kworker/0:1+events19:23:120
261317599321,26cyclictest2818600-21kworker/0:2+events23:45:480
261317599321,26cyclictest2719469-21kworker/0:0+events21:15:520
261317599320,31cyclictest1206777-21kworker/0:1+events19:47:400
261317599320,26cyclictest2887918-21kworker/0:0+events00:10:240
27803292310,10sleep30-21swapper/321:56:273
2613181993123,6cyclictest282-21systemd-journal00:25:002
261317899313,5cyclictest0-21swapper/121:31:151
261317899313,5cyclictest0-21swapper/120:21:161
2613178993127,2cyclictest2642342-21kthreadcore19:36:261
2613178993126,3cyclictest2877109-21needreboot23:31:301
2613178993125,4cyclictest2903331-21apt-get00:01:151
2613178993124,5cyclictest2689247-21apt-get20:25:011
2613178993122,8cyclictest2635601-21cut19:31:211
2613178993117,12cyclictest2655317-21cut19:51:201
2613175993124,5cyclictest2823794-21kworker/u8:1+events_unbound22:46:310
261317599312,24cyclictest2719469-21kworker/0:0+events21:45:160
261317599311,29cyclictest2818600-21kworker/0:2+events22:53:040
261317599311,26cyclictest2694423-21kworker/0:1+events20:50:240
261317599311,26cyclictest2694423-21kworker/0:1+events20:50:240
261317599311,24cyclictest2719469-21kworker/0:0+events21:20:160
261317599310,30cyclictest2788990-21kworker/0:0+events22:39:040
261317599310,30cyclictest2719469-21kworker/0:0+events21:01:520
261317599310,26cyclictest2719469-21kworker/0:0+events21:05:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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