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2026-07-26 - 12:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sun Jul 26, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24082210164,33sleep00-21swapper/019:05:500
2429329368,8sleep30-21swapper/319:08:303
2416428875,9sleep20-21swapper/219:06:522
2349727867,6sleep10-21swapper/119:05:221
99052550,1sleep1241rcuc/122:41:001
2449499261,1cyclictest3343-21/usr/sbin/munin21:40:231
2449099261,7cyclictest14306-21ntp_states22:05:230
2449999240,23cyclictest0-21swapper/223:11:422
2449999230,23cyclictest0-21swapper/222:22:522
2449999230,23cyclictest0-21swapper/222:22:522
2449999230,23cyclictest0-21swapper/221:26:552
2449999230,21cyclictest0-21swapper/221:54:432
2449999230,21cyclictest0-21swapper/200:10:082
2449999230,1cyclictest0-21swapper/222:29:412
24494992322,1cyclictest0-21swapper/122:06:371
24490992313,5cyclictest32353-21/usr/sbin/munin00:30:230
2449999220,22cyclictest0-21swapper/223:09:062
2449499220,21cyclictest0-21swapper/100:38:481
2450199211,18cyclictest25789-21sshd20:19:273
2449999211,1cyclictest141rcu_preempt22:15:072
24490992120,1cyclictest0-21swapper/022:29:410
2449999200,19cyclictest0-21swapper/223:47:132
24494992018,1cyclictest27699-21cut21:35:161
2449499201,19cyclictest0-21swapper/123:55:001
2449499200,0cyclictest0-21swapper/123:42:081
24490992019,1cyclictest0-21swapper/023:11:430
2449099200,20cyclictest0-21swapper/022:55:420
2449999190,19cyclictest0-21swapper/223:15:352
2449999190,18cyclictest0-21swapper/223:37:582
2449499190,18cyclictest0-21swapper/100:27:281
24490991918,1cyclictest0-21swapper/022:38:350
24490991911,6cyclictest13-21ksoftirqd/000:24:410
24501991815,2cyclictest17830-21kworker/3:021:51:023
2449999180,18cyclictest0-21swapper/222:30:252
2449999180,18cyclictest0-21swapper/222:00:282
2449499180,18cyclictest0-21swapper/100:07:101
2449499180,18cyclictest0-21swapper/100:07:101
2449099180,2cyclictest0-21swapper/022:32:530
2449999170,2cyclictest141rcu_preempt23:35:002
2449999170,16cyclictest0-21swapper/222:49:352
2449499172,15cyclictest0-21swapper/100:03:401
24494991715,2cyclictest8151-21latency_hist23:00:011
2449499170,16cyclictest3887-21cut20:40:171
24490991716,1cyclictest0-21swapper/023:01:040
24490991711,5cyclictest13-21ksoftirqd/021:26:170
2449099170,1cyclictest0-21swapper/021:44:060
2450199161,1cyclictest0-21swapper/300:34:453
2449999160,3cyclictest0-21swapper/200:03:552
2449999160,15cyclictest0-21swapper/200:23:402
2449499161,14cyclictest8178-21ssh22:01:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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