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2026-04-28 - 09:26

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 Tue Apr 28, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20014287455,8727sleep218447-21kworker/2:120:58:132
2027280418,768sleep02067-21/usr/sbin/munin20:01:020
15878266814,640sleep315885-21/usr/sbin/munin20:45:503
2606258718,551sleep32694-21/usr/sbin/munin23:30:543
4366252912,501sleep24383-21awk20:10:332
12143239215,365sleep212188-21grep00:01:142
6004223719,202sleep36080-21latency_hist20:15:343
6004223719,202sleep36080-21latency_hist20:15:343
21948222016,185sleep322080-21grep19:21:043
919221570,26sleep20-21swapper/219:56:072
8500221010,187sleep27998-21apt-get22:05:472
6726220711,178sleep26808-21cut20:16:022
28501220320,27sleep20-21swapper/223:10:352
9987220114,123sleep210049-21modprobe23:55:322
16881219319,147sleep20-21swapper/200:15:352
16881219319,147sleep20-21swapper/200:15:352
6476219029,146sleep26484-21latency_hist22:00:342
23090219010,160sleep223093-21acpi19:25:432
368521887,170sleep213441-21snmpd23:34:292
8857217740,126sleep213441-21snmpd20:23:082
8857217740,126sleep213441-21snmpd20:23:082
18038217361,39sleep218182-21unixbench_singl00:16:202
18038217361,39sleep218182-21unixbench_singl00:16:202
2787921687,148sleep227935-21tune2fs19:40:532
2231721635,12sleep20-21swapper/221:05:562
29313216169,25sleep20-21swapper/223:11:032
14667216111,136sleep113441-21snmpd19:00:481
32225216030,18sleep20-21swapper/219:55:352
22634215657,29sleep222706-21fschecks_time22:50:532
22634215657,29sleep222706-21fschecks_time22:50:532
29272215016,69sleep20-21swapper/221:27:112
2266121509,123sleep222768-21cut19:25:352
2136214916,109sleep32213-21fschecks_time21:45:543
20499214811,60sleep20-21swapper/200:25:522
486214414,113sleep1562-21mailstats19:56:021
22134214016,108sleep322194-21fschecks_time21:05:533
19432213915,103sleep319496-21mailstats20:56:003
30006213522,94sleep330026-21latency_hist23:15:323
4060213328,89sleep30-21swapper/321:51:023
15205212541,71sleep215260-21latency_hist00:10:342
19500212411,91sleep00-21swapper/020:56:010
31163212317,77sleep20-21swapper/221:35:352
19418212124,48sleep10-21swapper/122:40:501
10763212016,25sleep20-21swapper/220:30:352
28366211917,16sleep10-21swapper/121:25:531
3586211872,35sleep23597-21grep21:50:492
8059211711,57sleep20-21swapper/222:05:352
25638211755,46sleep20-21swapper/223:00:462
25638211755,46sleep20-21swapper/223:00:462
2179521150,6sleep00-21swapper/000:30:340
23096211423,71sleep322613-21apt-get19:25:443
21233211442,59sleep221308-21cat22:45:562
15516211418,80sleep315522-21df_inode00:10:523
15516211418,80sleep315522-21df_inode00:10:523
15142211415,81sleep015202-21/usr/sbin/munin19:01:030
10286211414,78sleep20-21swapper/223:55:442
17917211314,83sleep118036-21timerandwakeup00:16:191
17917211314,83sleep118036-21timerandwakeup00:16:191
17513211311,29sleep217533-21apt19:10:332
1575211021,18sleep20-21swapper/223:26:012
14901211038,55sleep20-21swapper/220:41:052
22385210912,20sleep20-21swapper/200:31:012
21051210912,30sleep121137-21sed00:26:041
1092210936,59sleep21169-21grep21:41:042
8510210824,52sleep18493-21apt-get22:05:541
27867210810,16sleep00-21swapper/019:40:510
26332210840,56sleep226365-21grep19:35:532
9736210713,77sleep30-21swapper/320:26:003
8490210617,72sleep18537-21grep23:50:351
19470210535,52sleep20-21swapper/219:15:342
26851210310,77sleep126925-21find19:36:041
2070321037,12sleep20-21swapper/219:16:102
12786210316,66sleep312829-21fschecks_count20:35:533
22526210211,45sleep00-21swapper/000:31:030
24770210117,67sleep324873-21perl19:30:533
18341210019,63sleep018400-21/usr/sbin/munin22:36:010
13142210031,52sleep20-21swapper/220:36:002
265129959,19sleep20-21swapper/221:46:052
2367929917,67sleep323689-21forks21:10:533
474029861,16sleep20-21swapper/220:10:532
474029861,16sleep20-21swapper/220:10:532
1696629816,64sleep117099-21sed22:31:011
109342980,8sleep00-21swapper/022:11:050
2454729713,68sleep10-21swapper/122:56:001
2260429713,68sleep122757-21awk00:31:041
1109329712,22sleep20-21swapper/220:30:432
80262969,11sleep30-21swapper/320:20:553
80262969,11sleep30-21swapper/320:20:553
1909829634,46sleep20-21swapper/200:20:562
1909829634,46sleep20-21swapper/200:20:562
822329520,19sleep30-21swapper/322:05:363
3059229517,61sleep130624-21kernelversion23:15:551
1762729529,49sleep20-21swapper/222:35:342
2359329461,15sleep20-21swapper/221:10:482
1127129437,12sleep20-21swapper/222:14:552
1672329318,56sleep016792-21modprobe00:15:330
1672329318,56sleep016792-21modprobe00:15:330
1007429310,61sleep010021-40mandb23:55:340
801329220,21sleep10-21swapper/122:05:341
592429223,43sleep15935-21modprobe20:15:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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