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2026-03-14 - 05:49

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 Sat Mar 14, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18334234765,3458sleep115274-21kworker/1:021:30:311
32590227707,2747sleep24936-21kworker/u8:220:33:282
32590227707,2747sleep24936-21kworker/u8:220:33:282
209462204319,2011sleep119486-21kworker/1:019:55:321
8010260012,571sleep08054-21ntpq00:23:350
8586251815,485sleep28728-21latency_hist19:18:142
17823238313,353sleep217900-21fschecks_time23:13:282
10526232426,241sleep210602-21sed22:48:412
9763228284,168sleep20-21swapper/221:03:312
6572227083,102sleep26540-21latency_hist19:13:142
11993225878,161sleep212043-21idleruntime-cro00:38:102
7910225342,196sleep27976-21latency00:23:332
3655224710,221sleep03694-21ntpq20:43:350
3655224710,221sleep03694-21ntpq20:43:350
143922417,221sleep21505-21fschecks_time00:03:302
25885223680,85sleep225970-21latency_hist20:13:132
6047222919,77sleep20-21swapper/200:18:282
14456222424,185sleep214518-21wc21:18:332
25251222213,195sleep325296-21if_eth021:53:313
25251222213,195sleep325296-21if_eth021:53:313
6555221116,107sleep26572-21modprobe22:38:112
278872210109,22sleep20-21swapper/222:03:102
73422056,166sleep2752-21fschecks_count22:18:332
13947220362,128sleep214000-21latency_hist21:18:132
20653219426,151sleep220651-21munin-run23:23:132
7075218545,91sleep20-21swapper/220:53:432
24757218222,132sleep024785-21munin-run21:53:110
30421217721,133sleep20-21swapper/223:53:122
2115321749,81sleep221215-21modprobe19:58:112
20088216863,39sleep220138-21readlink21:38:112
11541216810,89sleep20-21swapper/221:08:402
26487216717,133sleep126501-21awk23:38:381
26487216717,133sleep126501-21awk23:38:381
1178621628,118sleep211875-21cat22:53:332
3270721587,26sleep20-21swapper/223:58:382
13149215711,82sleep20-21swapper/219:33:122
9370215229,109sleep29462-21cat19:18:392
9370215229,109sleep29462-21cat19:18:392
2997214910,123sleep23092-21fschecks_time00:08:312
14940214917,116sleep114993-21idleruntime-cro19:38:121
14940214917,116sleep114993-21idleruntime-cro19:38:121
7702213911,113sleep07767-21cat20:58:130
32087213829,94sleep232193-21latency_hist23:58:132
23917213328,87sleep223920-21cron23:33:102
12844213212,20sleep10-21swapper/121:13:321
26502213131,42sleep226562-21find23:38:392
26502213131,42sleep226562-21find23:38:392
5071212728,87sleep25186-21timerandwakeup00:13:402
2997321278,104sleep230117-21grep20:23:432
6316212615,97sleep16330-21kernelversion00:18:351
28417212642,72sleep228404-21apt-get22:03:272
1352212610,103sleep00-21swapper/000:03:240
4376212531,67sleep14541-21grep19:03:401
17542212527,36sleep20-21swapper/219:43:422
27950212423,79sleep028080-21apt-config22:03:120
26096212311,96sleep25016-21cyclictest20:13:212
9029212214,40sleep20-21swapper/222:43:442
3200021227,29sleep232064-21mailstats22:13:402
29586211913,92sleep029607-21awk23:48:380
2349921197,71sleep20-21swapper/221:48:252
671221180,7sleep30-21swapper/319:13:143
5668211411,88sleep35272-21/usr/sbin/munin22:33:363
3734211329,70sleep23735-21apt-get22:28:222
22437211310,86sleep222501-21mailstats21:43:402
4807211225,75sleep213441-21snmpd20:48:262
25706211220,76sleep125835-21sed21:53:411
25706211220,76sleep125835-21sed21:53:411
22440211229,72sleep213441-21snmpd19:59:242
19373211212,87sleep113441-21snmpd19:50:111
3341211131,67sleep23355-21grep20:43:292
3341211131,67sleep23355-21grep20:43:292
2597621117,92sleep213441-21snmpd21:53:582
2597621117,92sleep213441-21snmpd21:53:582
32579210917,70sleep132074-21apt-get20:33:231
32579210917,70sleep132074-21apt-get20:33:231
31303210972,19sleep20-21swapper/220:28:392
13557210931,66sleep213619-21uname22:58:382
31476210715,76sleep031580-21ls20:28:410
2205210711,25sleep20-21swapper/220:38:412
2205210711,25sleep20-21swapper/220:38:412
22423210425,37sleep20-21swapper/223:28:132
20351210416,73sleep320359-21ntp_states19:53:403
15535210411,76sleep315685-21cut21:23:153
2401821036,11sleep20-21swapper/220:04:452
14646210324,21sleep20-21swapper/223:03:262
21709210126,64sleep221713-21munin-run21:43:122
19922210112,73sleep120000-21/usr/sbin/munin23:18:391
16872210112,74sleep016881-21diskstats19:43:280
1051621017,80sleep210666-21latency_hist00:33:142
1051621017,80sleep210666-21latency_hist00:33:142
28872210029,39sleep228882-21munin-run23:48:122
10869210015,30sleep011015-21latency_hist21:08:140
2302429913,68sleep023025-21/usr/sbin/munin20:03:260
3160129820,52sleep131683-21cut22:13:311
2171429817,22sleep30-21swapper/321:43:133
2091029820,59sleep021057-21latency_hist23:23:150
1859129821,16sleep20-21swapper/219:48:342
2158129713,64sleep021616-21proc_pri23:23:430
168492978,73sleep20-21swapper/221:26:202
86162967,75sleep28738-21cat20:58:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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