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2026-08-08 - 08:21

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 Sat Aug 08, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
335394521790,2sleep30-21swapper/320:32:563
33031542540,5sleep13303152-21fschecks_time19:42:501
3270563995242,7cyclictest3376701-21latency_hist20:55:011
3270563995143,5cyclictest3555460-21apt-get23:57:451
3270556995146,3cyclictest3450978-21kworker/u8:2+events_unbound22:57:470
3270556995144,5cyclictest3450978-21kworker/u8:2+events_unbound22:47:460
3270556995045,4cyclictest3411612-21kworker/u8:1+events_unbound23:22:500
3270556994945,3cyclictest3260607-21kworker/u8:2+events_unbound19:18:040
33303952480,3sleep1281rcuc/120:07:541
3270556994843,4cyclictest3431197-21kworker/u8:0+flush-8:023:13:040
34893092470,2sleep130-21ksoftirqd/122:47:551
3270556994739,6cyclictest3336963-21latency_hist20:15:010
3270556994640,4cyclictest3260607-21kworker/u8:2+events_unbound21:30:010
35267842440,3sleep3575-21kworker/3:2+events23:27:533
35267842440,3sleep3575-21kworker/3:2+events23:27:533
3270568994433,8cyclictest3460837-21cat22:19:592
3270568994428,15cyclictest3362058-21base6420:40:012
3270556994439,4cyclictest3270408-21kworker/u8:1+events_unbound19:30:000
3270556994435,7cyclictest3311560-21ntpq19:47:550
3270556994337,4cyclictest3431197-21kworker/u8:0+events_unbound23:05:010
3270563994231,8cyclictest275-21systemd-journal21:25:021
3270556994236,4cyclictest3411612-21kworker/u8:1+events_unbound23:27:490
3270556994236,4cyclictest3411612-21kworker/u8:1+events_unbound23:27:490
327034924226,10sleep10-21swapper/119:09:451
3270556994137,3cyclictest3431197-21kworker/u8:0+events_unbound22:52:450
3270556994034,4cyclictest3411612-21kworker/u8:1+events_unbound23:48:000
3270556994033,5cyclictest3560276-21kworker/u8:4+events_unbound00:02:470
3270568993920,16cyclictest3341878-21awk20:20:002
3270556993935,3cyclictest3560276-21kworker/u8:4+events_unbound00:17:470
3270556993935,3cyclictest3302610-21kworker/u8:3+events_unbound19:58:040
3270556993934,3cyclictest3260607-21kworker/u8:2+events_unbound19:23:070
3270556993933,4cyclictest3550301-21kworker/u8:0+events_unbound23:52:520
3270556993933,4cyclictest3356530-21kworker/u8:1+events_unbound21:07:500
3270556993933,4cyclictest275-21systemd-journal21:34:280
3270556993834,3cyclictest3302610-21kworker/u8:3+flush-8:022:07:540
3270556993833,3cyclictest3302610-21kworker/u8:3+events_unbound21:58:050
3270556993832,4cyclictest3534642-21kworker/u8:2+events_unbound23:38:030
3270556993832,4cyclictest3450978-21kworker/u8:2+events_unbound22:12:490
3270556993832,4cyclictest3450978-21kworker/u8:2+events_unbound22:12:490
3270556993832,4cyclictest3260607-21kworker/u8:2+events_unbound21:47:500
3270556993832,4cyclictest3260607-21kworker/u8:2+events_unbound20:18:000
3270568993724,11cyclictest3283371-21fschecks_time19:22:512
3270563993728,6cyclictest275-21systemd-journal19:24:401
3270556993731,4cyclictest3450978-21kworker/u8:2+events_unbound22:23:000
3270568993622,12cyclictest3441901-21fschecks_time22:02:502
3270568993621,13cyclictest0-21swapper/221:20:002
327056899361,28cyclictest3317689-21apt-get19:57:482
3270563993628,6cyclictest3550503-21/usr/sbin/munin23:53:001
3270563993626,8cyclictest3495650-21latency_hist22:55:021
3270563993625,9cyclictest3499827-21ntpq22:57:581
3270556993632,3cyclictest3411612-21kworker/u8:1+flush-8:021:43:070
3270556993631,3cyclictest3411612-21kworker/u8:1+events_unbound00:28:060
3270556993630,4cyclictest3260607-21kworker/u8:2+events_unbound20:43:050
3270568993523,10cyclictest3322906-21fschecks_count20:02:502
327056899352,25cyclictest3387114-21apt-get21:07:482
3270568993517,15cyclictest3336972-21awk20:15:002
327056899351,27cyclictest3481275-21apt-get22:42:462
327056899350,19cyclictest3509526-21/usr/sbin/munin23:07:562
3270563993528,5cyclictest275-21systemd-journal19:27:401
3270556993532,2cyclictest3302610-21kworker/u8:3+events_unbound21:53:030
3270556993531,3cyclictest3302610-21kworker/u8:3+events_unbound20:28:040
3270556993530,4cyclictest3302610-21kworker/u8:3+flush-8:019:53:050
3270556993530,4cyclictest3297292-21kworker/u8:0+events_unbound20:02:570
3270556993529,4cyclictest3356530-21kworker/u8:1+events_unbound20:38:040
3270556993529,4cyclictest3302610-21kworker/u8:3+events_unbound21:15:000
3270556993529,4cyclictest3302610-21kworker/u8:3+events_unbound21:15:000
35886152340,6sleep3451irq_work/300:27:563
35213402340,5sleep3451irq_work/323:22:523
3270568993421,11cyclictest3421102-21grep21:38:052
3270563993424,8cyclictest275-21systemd-journal22:05:001
3270556993430,3cyclictest3569967-21kworker/u8:0+events_unbound00:12:480
3270556993430,3cyclictest3515616-21kworker/u8:3+events_unbound23:17:470
3270556993430,3cyclictest3431197-21kworker/u8:0+flush-8:022:18:040
3270556993430,3cyclictest3302610-21kworker/u8:3+flush-8:021:23:050
3270556993429,4cyclictest3569967-21kworker/u8:0+events_unbound00:31:180
3270556993429,4cyclictest3569967-21kworker/u8:0+events_unbound00:31:180
3270556993429,3cyclictest3356530-21kworker/u8:1+events_unbound21:03:050
3270556993428,5cyclictest3534642-21kworker/u8:2+flush-8:023:42:510
3270556993427,2cyclictest3260607-21kworker/u8:2+events_unbound21:16:460
327056899333,23cyclictest3406877-21apt-get21:27:462
3270568993315,15cyclictest3312120-21unixbench_singl19:48:032
327056899331,24cyclictest3515842-21apt-get23:17:452
327056899331,24cyclictest3312778-21apt-get19:52:482
3270563993326,5cyclictest3426252-21latency_hist21:45:011
3270556993329,3cyclictest3450978-21kworker/u8:2+flush-8:022:42:510
327056899321,24cyclictest3525733-21apt-get23:27:462
327056899321,24cyclictest3525733-21apt-get23:27:462
3270556993228,3cyclictest3450978-21kworker/u8:2+flush-8:022:33:040
3270556993228,3cyclictest3260607-21kworker/u8:2+events_unbound20:23:070
3270556993225,5cyclictest275-21systemd-journal20:56:460
3270556993224,6cyclictest3356530-21kworker/u8:1+events_unbound20:48:000
34602382310,2sleep1161rcu_preempt22:18:021
3270568993126,3cyclictest3511258-21fschecks_time23:12:502
327056899312,22cyclictest3302842-21apt-get19:42:482
327056899311,23cyclictest3287967-21apt-get19:27:462
3270563993126,3cyclictest3381723-21idleruntime-cro21:00:001
3270556993127,3cyclictest3302610-21kworker/u8:3+flush-8:020:32:540
3270556993127,3cyclictest3302610-21kworker/u8:3+events_unbound21:38:470
3270556993127,3cyclictest3297292-21kworker/u8:0+flush-8:019:43:050
3270556993127,3cyclictest3270408-21kworker/u8:1+events_unbound19:33:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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