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2026-08-30 - 19:14

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 Sun Aug 30, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
329165021780,3sleep30-21swapper/307:52:403
35054192630,6chrt0-21swapper/211:27:372
3247808995950,7cyclictest3246951-21kworker/u8:2+flush-8:007:37:360
34234292540,1chrt3423430-21unixbench_singl10:02:510
3247808995039,9cyclictest3334851-21diskstats08:37:330
3247814994931,16cyclictest3264583-21gpgv07:25:002
3247814994923,8cyclictest3523751-21diskstats11:47:332
3247808994736,8cyclictest275-21systemd-journal12:40:010
3247814994638,5cyclictest275-21systemd-journal07:45:002
3247814994638,5cyclictest275-21systemd-journal07:45:002
3247808994535,8cyclictest2253105-21kworker/u8:1+flush-8:007:15:060
3247808994535,7cyclictest275-21systemd-journal12:07:320
3247814994327,3cyclictest3325038-21fschecks_time08:27:332
3247812994334,7cyclictest3478043-21latency_hist11:00:011
3247812994225,6cyclictest3389941-21irqrtprio09:32:371
34059682410,4sleep10-21swapper/109:47:391
3247808994032,5cyclictest3557625-21latency_hist12:20:010
3247812993914,16cyclictest3463486-21taskset10:45:161
3247812993913,16cyclictest3508415-21taskset11:30:021
3247812993912,15cyclictest3448692-21runrttasks10:31:521
3247812993833,3cyclictest3384984-21irqrtprio09:27:391
3247812993814,14cyclictest3453625-21taskset10:36:131
3247812993814,12cyclictest3528231-21taskset11:50:131
3247812993813,14cyclictest3289397-21runrttasks07:49:111
3247812993813,14cyclictest3289397-21runrttasks07:49:111
3247812993812,16cyclictest3348895-21runrttasks08:49:021
3247808993830,6cyclictest3467906-21grep10:47:500
3247808993830,6cyclictest275-21systemd-journal10:22:070
324781299379,15cyclictest3354597-21df_inode08:57:321
3247812993714,14cyclictest3319237-21taskset08:18:561
3247812993714,10cyclictest3463087-21runrttasks10:43:081
3247812993712,13cyclictest3523349-21runrttasks11:45:521
3247812993712,11cyclictest3353055-21missed_timers08:52:401
3247812993710,10cyclictest3371422-21kthreadcore09:12:391
3247808993728,6cyclictest275-21systemd-journal07:57:320
3247814993628,5cyclictest275-21systemd-journal09:32:002
3247812993623,5cyclictest161rcu_preempt10:20:011
3247812993612,15cyclictest3418282-21runrttasks09:58:011
3247812993612,15cyclictest3329517-21taskset08:31:161
3247812993612,14cyclictest3513441-21taskset11:36:121
3247812993612,14cyclictest3408792-21runrttasks09:50:101
3247812993612,14cyclictest3408792-21runrttasks09:50:101
3247812993612,13cyclictest3319599-21runrttasks08:20:211
3247808993626,7cyclictest3438437-21latency_hist10:20:000
3247814993526,7cyclictest275-21systemd-journal10:33:322
324781299359,15cyclictest3268736-21memory07:27:401
324781299359,13cyclictest3543208-21/usr/sbin/munin12:07:331
324781299359,13cyclictest3340124-21sed08:42:371
3247812993513,9cyclictest3299889-21runrttasks08:00:391
3247812993513,8cyclictest3573007-21runrttasks12:37:011
3247812993513,13cyclictest3488066-21taskset11:08:521
3247812993513,12cyclictest3548098-21runrttasks12:11:401
3247812993511,10cyclictest3567381-21runrttasks12:28:491
3247812993511,10cyclictest3559612-21kthreadcore12:22:381
3247812993510,9cyclictest3277108-21kthreadcore07:37:391
3247812993510,15cyclictest3494214-21if_enp4s0.211:17:351
3247812993510,11cyclictest3252495-21head07:12:501
3247808993530,4cyclictest3246951-21kworker/u8:2+flush-8:007:47:350
3247808993530,4cyclictest3246951-21kworker/u8:2+flush-8:007:47:350
3247808993529,4cyclictest3513567-21apt-get11:37:300
324781299349,10cyclictest3294647-21taskset07:55:141
324781299348,16cyclictest3263742-21ntpq07:22:421
324781299348,12cyclictest3378111-21ld09:17:431
3247812993413,12cyclictest3482447-21taskset11:02:421
3247812993413,10cyclictest573-21runrttasks09:01:081
3247812993412,9cyclictest3468503-21taskset10:51:221
3247812993412,13cyclictest3448240-21runrttasks10:29:031
3247812993411,9cyclictest3539538-21kthreadcore12:02:371
3247812993411,9cyclictest3539538-21kthreadcore12:02:371
3247812993411,7cyclictest3568150-21cpuspeed_turbos12:32:321
3247812993411,10cyclictest3364496-21/usr/sbin/munin09:07:401
3247812993410,10cyclictest3535770-21kthreadcore11:57:391
3247812993410,10cyclictest3535770-21kthreadcore11:57:391
3247812993410,10cyclictest3506262-21kthreadcore11:27:371
3247808993429,4cyclictest3246951-21kworker/u8:2+flush-8:008:07:340
3247814993327,4cyclictest3468929-21fschecks_time10:52:332
324781299339,9cyclictest3489718-21cut11:12:371
324781299339,14cyclictest3442649-21ld10:22:411
324781299339,14cyclictest3335072-21cat08:37:361
324781299338,14cyclictest3429008-21apt-get10:12:301
3247812993311,9cyclictest3274288-21timerwakeupswit07:32:501
3247812993310,8cyclictest3502573-21gcc11:22:461
3247808993329,3cyclictest3195856-21kworker/u8:3+events_unbound07:12:480
3247808993326,5cyclictest2253105-21kworker/u8:1+flush-8:007:22:420
324780899330,31cyclictest3418529-21munin-run10:00:000
324781299329,9cyclictest3553536-21if_enp4s012:17:341
324781299329,9cyclictest3283862-21gcc07:42:451
324781299329,9cyclictest3283862-21gcc07:42:451
324781299329,13cyclictest3328440-21collect208:27:411
324781299329,10cyclictest3309742-21runrttasks08:10:301
3247812993210,8cyclictest3420357-21kthreadcore10:02:401
3247812993210,8cyclictest3383844-21munin-run09:25:001
3247808993228,3cyclictest3271980-21kthreadcore07:32:390
324780899321,29cyclictest1-21systemd09:09:320
32475712324,10sleep20-21swapper/207:09:302
324781299319,13cyclictest3394626-21if_enp4s0.209:37:361
324781299319,12cyclictest3247864-21latency_hist07:10:011
324781299318,9cyclictest3399083-21runrttasks09:42:111
324781299318,9cyclictest3253072-21irqcore07:15:011
324781299318,10cyclictest3518528-21runrttasks11:42:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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