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2026-04-03 - 08:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
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 rackbslot7s.osadl.org (updated Fri Apr 03, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
130192515714,5131sleep39992-21kworker/3:020:30:403
223822489914,4874sleep320644-21kworker/3:121:00:403
5593269016,656sleep35586-21apt-get23:32:163
20903228627,241sleep320917-21modprobe20:57:013
7186225810,49sleep00-21swapper/020:12:190
22396225681,154sleep013441-21snmpd19:17:190
32728224477,151sleep0376-21timerandwakeup21:32:310
22882222524,175sleep323019-21unixbench_multi22:42:333
14111222445,129sleep014149-21processes23:57:290
20518221733,146sleep020649-21timerwakeupswit00:17:320
11837221340,156sleep011990-21apt-key23:52:040
11837221340,156sleep011990-21apt-key23:52:040
20628221236,115sleep00-21swapper/022:37:130
10999221124,161sleep111141-21unixbench_multi20:22:341
1975622077,187sleep00-21swapper/022:32:410
7067220144,106sleep00-21swapper/021:56:020
7067220144,106sleep00-21swapper/021:56:020
28152218534,28sleep00-21swapper/019:36:130
10240218520,95sleep00-21swapper/023:47:110
664521835,167sleep00-21swapper/023:34:230
156692182122,45sleep015731-21uname00:02:300
12305218148,114sleep012339-21modprobe22:12:010
679721735,12sleep10-21swapper/121:52:351
679721735,12sleep10-21swapper/121:52:351
2065221707,149sleep020678-21latency19:12:100
1802217012,100sleep00-21swapper/019:54:510
1768721686,12sleep00-21swapper/022:27:280
9232216745,40sleep00-21swapper/022:02:120
2270121678,147sleep022726-21munin-run00:27:010
11710216616,135sleep211826-21timerwakeupswit22:07:392
17863216310,105sleep018014-21latency_hist20:47:040
18060216231,21sleep00-21swapper/000:12:030
13059216240,21sleep00-21swapper/022:12:290
32587216115,130sleep332715-21uptime23:12:333
10925216054,51sleep00-21swapper/020:22:330
2881921586,36sleep00-21swapper/023:02:210
25112215313,129sleep025190-21ls00:32:300
2410121529,22sleep00-21swapper/021:07:030
18926214617,52sleep218976-21fschecks_count22:32:222
15259214661,67sleep015277-21kernelversion20:37:230
3047214560,64sleep00-21swapper/023:22:320
25302214410,30sleep025409-21latency_hist22:52:030
1834721435,12sleep20-21swapper/200:12:172
32205214218,18sleep00-21swapper/019:47:320
32205214218,18sleep00-21swapper/019:47:320
4442214010,93sleep04482-21ntp_kernel_pll_23:27:240
3156921389,53sleep00-21swapper/023:12:020
28797213721,97sleep128815-21uname19:37:231
28797213721,97sleep128815-21uname19:37:231
1828221378,114sleep018339-21if_eth020:47:200
4315213616,60sleep00-21swapper/021:47:130
20926213610,26sleep00-21swapper/020:57:020
25168213514,106sleep325141-21latency_hist19:27:033
13814213551,60sleep00-21swapper/020:32:260
12546213518,100sleep212675-21unixbench_multi20:27:322
8810213434,88sleep00-21swapper/021:59:570
8810213434,88sleep00-21swapper/021:59:570
16990213429,84sleep217022-21munin-plugin-st22:27:012
21826213326,50sleep00-21swapper/020:57:300
24488213212,29sleep024554-21idleruntime21:07:240
8473212732,83sleep08503-21latency_hist23:42:020
1640212711,102sleep01686-21ntpq21:37:280
2974721265,11sleep00-21swapper/019:41:300
2974721265,11sleep00-21swapper/019:41:300
1988621255,108sleep00-21swapper/019:10:080
2471212422,71sleep12490-21apt-get23:22:131
27236212322,26sleep30-21swapper/321:17:043
9132212013,21sleep00-21swapper/020:17:240
1844212012,94sleep31856-21vmstat23:17:343
17222212017,88sleep317376-21unixbench_multi20:42:353
1492821199,94sleep015080-21sed22:17:340
22710211810,89sleep222755-21ntp_offset19:17:252
1945321185,10sleep00-21swapper/000:15:300
9182211618,76sleep38696-21/usr/sbin/munin23:42:303
10029211610,93sleep010085-21sed23:47:030
8832211414,84sleep20-21swapper/222:00:162
8832211414,84sleep20-21swapper/222:00:162
6733211453,48sleep021800-1kworker/0:1H20:09:570
30607211412,73sleep30-21swapper/323:07:253
917211334,27sleep00-21swapper/023:17:070
5326211334,67sleep00-21swapper/020:06:460
24793211313,77sleep224800-21/usr/sbin/munin21:07:302
22670211310,90sleep022711-21cut22:42:300
9020211024,70sleep39112-21latency_hist22:02:023
9020211024,70sleep39112-21latency_hist22:02:023
26943211034,28sleep00-21swapper/021:14:180
1307321105,10sleep00-21swapper/020:31:210
31577210934,28sleep00-21swapper/021:28:480
28215210916,39sleep00-21swapper/021:17:330
2553921098,50sleep025533-21apt-get22:52:150
13641210913,82sleep20-21swapper/223:57:152
28504210819,72sleep228521-21apt19:37:122
28504210819,72sleep228521-21apt19:37:122
25891210812,80sleep00-21swapper/019:27:290
18445210737,35sleep00-21swapper/019:07:010
19443210515,73sleep119520-21timerandwakeup22:32:331
2733521048,14sleep10-21swapper/122:57:211
22994210437,47sleep00-21swapper/000:27:170
17443210419,61sleep217593-21unixbench_multi00:07:332
355621038,47sleep03597-21sh20:02:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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