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2025-11-28 - 08:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Fri Nov 28, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
277721020,38sleep12778-21cat19:09:001
266929910137,10cyclictest12966-21grep21:44:053
266929910137,10cyclictest12966-21grep21:44:053
26689999736,13cyclictest0-21swapper/123:33:271
162652900,15sleep32669299cyclictest22:59:013
52752850,3sleep1201ktimersoftd/120:23:361
26686998535,44cyclictest19074-21fschecks_count19:43:540
26686998524,53cyclictest0-21swapper/023:43:270
2668699835,30cyclictest0-21swapper/018:55:050
2668699833,28cyclictest1369-21runrttasks23:47:310
26686998324,12cyclictest0-21swapper/022:58:290
2668699829,8cyclictest114550irq/46-eth019:17:500
2668699824,71cyclictest0-21swapper/022:38:500
2668699824,30cyclictest0-21swapper/020:56:220
26686998230,46cyclictest3471-21unixbench_multi19:09:120
26686998230,46cyclictest1369-21runrttasks21:20:290
26686998230,46cyclictest1369-21runrttasks20:10:150
2668699823,9cyclictest13357-21turbostat00:03:270
2668699823,71cyclictest17181-21cut00:08:540
2668699823,24cyclictest3163-21grep22:33:450
26686998228,47cyclictest1369-21runrttasks21:58:500
26686998224,51cyclictest0-21swapper/020:47:590
26686998130,45cyclictest14750-21grep00:03:520
26686998122,9cyclictest1369-21runrttasks22:29:050
2668699804,11cyclictest0-21swapper/020:23:520
26686998029,9cyclictest28120-21sh20:03:500
2668699794,11cyclictest0-21swapper/019:48:560
2668699793,31cyclictest0-21swapper/019:58:500
2668699793,31cyclictest0-21swapper/000:18:590
2668699793,29cyclictest1369-21runrttasks21:15:330
2668699793,28cyclictest0-21swapper/020:33:490
2668699793,11cyclictest0-21swapper/019:38:570
2668699793,10cyclictest8468-21grep22:43:500
26686997919,9cyclictest19905-21sshd00:14:020
2668699784,31cyclictest0-21swapper/021:48:500
2668699784,12cyclictest0-21swapper/021:28:540
26686997830,42cyclictest26833-21munin-node21:08:490
26686997826,8cyclictest15303-21timerwakeupswit19:34:120
26686997826,8cyclictest15303-21timerwakeupswit19:34:120
26686997822,11cyclictest0-21swapper/023:03:440
26686997812,14cyclictest0-21swapper/023:53:270
2668699774,66cyclictest0-21swapper/023:08:480
2668699774,66cyclictest0-21swapper/023:08:480
2668699773,31cyclictest0-21swapper/023:23:430
26686997724,11cyclictest0-21swapper/021:03:480
26686997715,13cyclictest0-21swapper/022:48:460
2668699765,12cyclictest0-21swapper/022:25:210
2668699765,12cyclictest0-21swapper/022:25:210
2668699764,24cyclictest0-21swapper/019:24:090
2668699764,13cyclictest0-21swapper/022:11:310
2668699764,10cyclictest0-21swapper/023:13:490
2668699763,30cyclictest0-21swapper/022:14:360
2668699763,29cyclictest0-21swapper/022:08:310
26686997628,42cyclictest22039-21munin-node20:59:010
26686997622,8cyclictest1618-21nscd21:39:060
26686997621,9cyclictest1369-21runrttasks23:21:070
26686997618,9cyclictest12145-21gltestperf19:28:550
2668699754,12cyclictest0-21swapper/023:35:050
2668699753,31cyclictest0-21swapper/020:20:350
2668699753,11cyclictest0-21swapper/018:59:020
26686997524,9cyclictest0-21swapper/021:33:470
26686997524,7cyclictest16407-21ls22:59:020
26686997523,10cyclictest0-21swapper/021:23:480
2668699745,9cyclictest0-21swapper/023:58:270
2668699745,9cyclictest0-21swapper/023:58:270
2668699743,11cyclictest0-21swapper/019:19:130
26686997425,10cyclictest0-21swapper/022:18:460
26686997420,10cyclictest659-21cpuspeed_turbos20:13:500
26686997420,10cyclictest659-21cpuspeed_turbos20:13:500
26686997418,12cyclictest0-21swapper/021:53:440
2668699734,13cyclictest0-21swapper/019:04:570
2668699724,11cyclictest0-21swapper/020:38:580
2668699723,30cyclictest0-21swapper/023:28:430
2668699723,14cyclictest0-21swapper/019:58:360
26686997229,9cyclictest11839-21fschecks_count21:43:500
26686997229,9cyclictest11839-21fschecks_count21:43:500
2668699703,10cyclictest0-21swapper/020:28:550
2668699693,15cyclictest0-21swapper/020:48:550
2524726310,43sleep00-21swapper/018:48:580
2524726310,43sleep00-21swapper/018:48:580
243799620,4rtkit-daemon2436-21rtkit-daemon20:14:312
243799620,4rtkit-daemon2436-21rtkit-daemon20:14:312
243799620,4rtkit-daemon2436-21rtkit-daemon00:09:442
243799600,4rtkit-daemon2436-21rtkit-daemon19:57:172
215592603,13sleep20-21swapper/222:03:512
83662593,11sleep10-21swapper/119:19:211
243799590,4rtkit-daemon2436-21rtkit-daemon22:48:402
198572599,8sleep119993-21expr20:53:491
2669299584,49cyclictest0-21swapper/321:28:333
2668999584,24cyclictest0-21swapper/122:43:431
26689995831,13cyclictest0-21swapper/120:28:471
26691995723,15cyclictest0-21swapper/221:58:322
2668999563,47cyclictest0-21swapper/122:23:491
2668999563,47cyclictest0-21swapper/122:23:491
26689995628,13cyclictest0-21swapper/123:01:481
26689995627,14cyclictest0-21swapper/120:03:501
243799560,5rtkit-daemon2436-21rtkit-daemon23:48:002
300722553,44sleep20-21swapper/223:28:512
2669199558,27cyclictest0-21swapper/223:18:402
26691995534,13cyclictest32537-21sed19:04:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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