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2026-09-16 - 03:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Wed Sep 16, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2236121180,3chrt0-21swapper/220:49:352
174421180,4sleep20-21swapper/219:54:362
293662920,2chrt0-21swapper/321:09:303
293662920,2chrt0-21swapper/321:09:303
78962800,2sleep07897-21grep20:09:420
226522630,3chrt0-21swapper/222:17:432
18956996144,14cyclictest29913-21/usr/sbin/munin00:04:340
18956996144,14cyclictest29913-21/usr/sbin/munin00:04:340
249952600,2sleep024869-21/usr/sbin/munin22:24:300
249952600,2sleep024869-21/usr/sbin/munin22:24:300
116882590,3sleep20-21swapper/220:19:412
116882590,3sleep20-21swapper/220:19:412
312032580,2sleep20-21swapper/200:04:452
312032580,2sleep20-21swapper/200:04:452
278302570,3sleep027952-21missed_timers21:04:380
18957995447,4cyclictest0-21swapper/100:04:321
18957995447,4cyclictest0-21swapper/100:04:321
15632530,3sleep30-21swapper/300:14:313
15632530,3sleep30-21swapper/300:14:313
256622510,3sleep125664-21fschecks_time20:59:311
256622510,3sleep125664-21fschecks_time20:59:311
99792500,3sleep118946-21cyclictest21:44:301
99792500,3sleep118946-21cyclictest21:44:301
55802490,3sleep30-21swapper/322:59:333
55802490,3sleep30-21swapper/322:59:333
36952490,3chrt0-21swapper/000:19:340
36952490,3chrt0-21swapper/000:19:340
203582490,3sleep30-21swapper/320:44:343
203582490,3sleep30-21swapper/320:44:343
7102470,3chrt0-21swapper/219:52:432
253672470,2sleep10-21swapper/120:59:231
18956994722,23cyclictest25526-21sshd19:30:430
18956994722,23cyclictest25526-21sshd19:30:430
191302460,3sleep10-21swapper/123:34:331
26972450,3sleep20-21swapper/221:24:332
26972450,3sleep20-21swapper/221:24:332
53712430,2sleep15372-21cut22:59:191
18956994236,3cyclictest0-21swapper/000:04:300
18956994118,21cyclictest0-21swapper/020:54:290
42062400,2sleep04208-21date21:29:250
42062400,2sleep04208-21date21:29:250
18956994013,6cyclictest4162-21kernelversion22:54:330
18956994012,4cyclictest0-21swapper/021:20:370
18956994012,4cyclictest0-21swapper/021:20:370
18956994010,6cyclictest1518-21seq22:48:410
18956994010,6cyclictest1518-21seq22:48:410
1895799391,33cyclictest14678-21systemd-journal00:04:231
1895799391,33cyclictest14678-21systemd-journal00:04:231
1895699391,12cyclictest1069-21/usr/sbin/munin19:54:440
63832380,1chrt6381-21tune2fs21:34:320
41942380,3chrt0-21swapper/219:59:432
41942380,3chrt0-21swapper/219:59:432
231192380,2sleep00-21swapper/022:19:310
231192380,2sleep00-21swapper/022:19:310
231192380,2sleep00-21swapper/022:19:310
18956993814,5cyclictest0-21swapper/022:34:390
18956993814,5cyclictest0-21swapper/022:34:390
18956993814,2cyclictest0-21swapper/023:59:390
1895699381,16cyclictest5231-21ls20:04:330
1895699381,16cyclictest5231-21ls20:04:330
186232380,3sleep20-21swapper/220:39:342
186232380,3sleep20-21swapper/220:39:342
267972370,3sleep10-21swapper/123:54:351
267972370,3sleep10-21swapper/123:54:351
18956993711,5cyclictest28130-21cut19:39:300
18956993711,5cyclictest28130-21cut19:39:300
1895699371,10cyclictest29188-21/usr/sbin/munin21:09:300
1895699371,10cyclictest29188-21/usr/sbin/munin21:09:300
54772360,8sleep15479-21grep21:29:421
54772360,8sleep15479-21grep21:29:421
24372360,3sleep20-21swapper/222:49:352
18957993629,5cyclictest24015-21threads22:19:421
18957993629,5cyclictest24015-21threads22:19:421
18957993629,5cyclictest24015-21threads22:19:421
18956993627,7cyclictest11135-21needreboot20:19:350
18956993627,7cyclictest11135-21needreboot20:19:350
18956993610,4cyclictest0-21swapper/023:29:330
18956993610,4cyclictest0-21swapper/023:29:330
18957993526,7cyclictest26734-21netstat19:34:371
18956993514,2cyclictest0-21swapper/020:47:170
18956993514,2cyclictest0-21swapper/020:47:170
172412350,2sleep116829-21/usr/sbin/munin23:29:341
172412350,2sleep116829-21/usr/sbin/munin23:29:341
1896099342,25cyclictest29832-21chrt00:04:263
1896099342,25cyclictest29832-21chrt00:04:263
18957993427,5cyclictest547-21rs:main1
18957993427,5cyclictest547-21rs:main1
18956993415,3cyclictest0-21swapper/000:14:380
18956993415,3cyclictest0-21swapper/000:14:380
18956993328,4cyclictest14678-21systemd-journal21:44:190
18956993328,4cyclictest14678-21systemd-journal21:44:190
18956993328,4cyclictest14678-21systemd-journal21:44:190
18956993325,6cyclictest10588-21needreboot21:44:360
18956993325,6cyclictest10588-21needreboot21:44:360
18956993324,7cyclictest31430-21idleruntime-cro19:49:180
18956993311,4cyclictest0-21swapper/020:24:390
18956993311,4cyclictest0-21swapper/020:24:390
18957993227,4cyclictest7587-21sort23:04:291
18957993224,6cyclictest6409-21fschecks_time21:34:321
18957993224,6cyclictest18946-21cyclictest21:18:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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