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2025-12-18 - 01:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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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: performance
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rack2slot7s.osadl.org (updated Wed Dec 17, 2025 19:55:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3719175995638,16cyclictest321075-21wc18:09:280
3719176995446,5cyclictest4017174-21sh17:43:111
3719176995446,5cyclictest4017174-21sh17:43:111
3719176995344,5cyclictest334925-21sh18:10:041
3719177995239,10cyclictest3971523-21sh17:41:162
3719177995239,10cyclictest3971523-21sh17:41:162
3719176995240,9cyclictest4027677-21execl17:49:421
3719176995143,5cyclictest348474-21multi.sh18:10:351
3719175994941,4cyclictest0-21swapper/017:49:380
3719176994817,12cyclictest4028641-21execl17:50:561
3719177994736,7cyclictest247539-21syscall18:04:422
3719176994722,9cyclictest416496-21ntpq18:39:431
3719176994721,7cyclictest0-21swapper/118:03:311
3719176994721,18cyclictest0-21swapper/118:34:411
3719175994737,7cyclictest3939969-21sh17:39:380
3719177994638,4cyclictest0-21swapper/217:49:372
3719176994639,3cyclictest0-21swapper/117:39:381
3719176994620,20cyclictest0-21swapper/118:24:431
3719175994633,10cyclictest3987733-21sort17:41:580
3719175994633,10cyclictest3987733-21sort17:41:580
3719177994534,8cyclictest327619-21sh18:09:432
3719176994516,9cyclictest410658-21ntpq18:19:451
3719177994435,5cyclictest351279-21sh18:10:412
3719175994437,5cyclictest412668-21systemd-run18:25:010
3719176994334,5cyclictest4030288-21Run17:58:271
3719176994333,5cyclictest3720045-21ntpq17:09:401
3719176994313,11cyclictest3724063-21fstime17:22:261
3719175994330,11cyclictest368077-21sh18:11:220
3719176994216,10cyclictest3762715-21spawn17:33:421
3719176994127,8cyclictest3725616-21sshd17:29:161
3719177994032,5cyclictest3940176-21sh17:39:392
3719176994031,4cyclictest413511-21ntpq18:29:411
3719176994013,9cyclictest3722822-21df_inode17:19:341
3719177993830,5cyclictest3722075-21Run17:15:012
3719176993820,12cyclictest3720860-21sshd17:14:171
3719175993821,3cyclictest171rcu_preempt18:04:150
371917799362,29cyclictest3871335-21spawn17:34:412
3719177993620,6cyclictest413261-21if_eth018:29:362
371917599362,23cyclictest3721580-21ntpq17:14:440
3719175993612,9cyclictest0-21swapper/017:09:480
3719177993522,5cyclictest4028619-21execl17:50:242
3719176993528,4cyclictest3719196-21latency_hist17:05:011
3719175993520,6cyclictest171rcu_preempt17:29:410
3719175993428,3cyclictest3893326-21spawn17:34:530
3719175993419,6cyclictest171rcu_preempt17:50:480
3719177993326,3cyclictest0-21swapper/217:57:512
3719177993322,8cyclictest414931-21needreboot18:34:392
3719177993226,3cyclictest0-21swapper/218:20:012
3719177993224,6cyclictest2401394-21cups-browsed17:09:412
3719177993223,6cyclictest411729-21fschecks_count18:24:352
3719177993125,3cyclictest0-21swapper/217:30:012
3719175993110,8cyclictest171rcu_preempt18:29:410
3719177993021,6cyclictest417108-21latency_hist18:40:012
3719175993025,3cyclictest3725232-21grep17:24:500
3719177992923,3cyclictest0-21swapper/217:24:312
3719175992917,3cyclictest171rcu_preempt18:19:440
3719175992913,3cyclictest171rcu_preempt17:59:300
3719177992815,6cyclictest2401394-21cups-browsed17:17:012
3719175992813,3cyclictest171rcu_preempt18:34:440
3719175992716,2cyclictest171rcu_preempt17:05:010
3719175992713,3cyclictest171rcu_preempt18:39:360
3719175992621,3cyclictest3723780-21grep17:20:000
371917899224,9cyclictest0-21swapper/317:51:583
3719177992210,5cyclictest171rcu_preempt17:05:012
371917899213,11cyclictest0-21swapper/317:49:393
371917899205,10cyclictest0-21swapper/318:05:443
371917899203,11cyclictest0-21swapper/317:56:133
371917899203,10cyclictest0-21swapper/318:10:273
371917899202,8cyclictest0-21swapper/317:24:433
371917899174,8cyclictest0-21swapper/317:39:363
371917899173,6cyclictest0-21swapper/318:39:433
371917899172,9cyclictest0-21swapper/318:01:153
371917899162,8cyclictest0-21swapper/317:34:413
371917899162,6cyclictest0-21swapper/317:19:443
371917899161,9cyclictest0-21swapper/317:41:283
371917899161,9cyclictest0-21swapper/317:41:283
371917899152,5cyclictest0-21swapper/318:29:413
371917899143,6cyclictest0-21swapper/317:14:453
371917899142,8cyclictest0-21swapper/318:35:003
371917899132,7cyclictest0-21swapper/317:28:083
371917899131,7cyclictest0-21swapper/318:20:013
371917899121,7cyclictest0-21swapper/318:24:453
371917899113,5cyclictest0-21swapper/317:09:423
371917899111,7cyclictest0-21swapper/317:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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