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2026-05-15 - 12:18

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 May 15, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20091210848,1017sleep320132-21unin-run00:29:243
107432101850,910sleep310760-21unin-run23:59:243
13202496133,288sleep31353-21fschecks_count20:04:453
1516922789,255sleep315231-21mailstats22:29:523
1516922789,255sleep315231-21mailstats22:29:523
79692272166,40sleep38051-21gpgv22:09:253
95282265173,74sleep30-21swapper/320:29:483
17580224648,185sleep317656-21sed22:39:253
15759223718,197sleep015853-21fschecks_time00:14:430
405122349,210sleep34136-21cat23:39:253
22223223398,65sleep30-21swapper/300:34:453
17311223111,206sleep217403-21load20:54:462
425222424,117sleep3564-21unixbench_singl20:00:173
17781222210,189sleep317931-21grep20:54:553
16063221315,183sleep216153-21cat20:49:542
16063221315,183sleep216153-21cat20:49:542
12844221312,179sleep312847-21cron22:24:233
12844221312,179sleep312847-21cron22:24:233
22466220935,57sleep30-21swapper/322:54:393
22466220935,57sleep30-21swapper/322:54:393
31939220410,176sleep331309-21/usr/sbin/munin21:39:543
26910220112,173sleep326997-21latency_hist23:09:253
2980121997,181sleep3363-21snmpd19:51:323
20520219813,173sleep320615-21latency_hist19:24:273
7547218325,87sleep37745-21grep23:49:273
31655218116,151sleep131741-21apt-config19:59:261
1575521780,30sleep215759-21fschecks_count19:09:432
30439217212,145sleep330596-21grep21:34:573
18704217023,85sleep318794-21fschecks_time20:59:443
30398216812,142sleep330465-21fschecks_time19:54:433
15850216658,24sleep30-21swapper/319:09:453
1117621599,138sleep311201-21awk20:34:493
1117621599,138sleep311201-21awk20:34:493
9346215619,115sleep09412-21fschecks_time20:29:450
20996215267,20sleep30-21swapper/300:29:573
12770215216,118sleep112538-21/usr/sbin/munin00:04:471
2399121479,81sleep30-21swapper/321:14:543
17225214111,66sleep30-21swapper/300:19:353
14141213914,112sleep00-21swapper/019:04:420
23288213318,94sleep30-21swapper/321:14:263
57221319,109sleep3641-21basename21:44:463
18226213124,93sleep318314-21timerandwakeup19:14:543
27239213016,82sleep30-21swapper/323:09:463
16242212614,82sleep20-21swapper/222:34:402
1170212643,69sleep31162-21apt-get23:29:403
8362212520,88sleep18483-21timerwakeupswit20:24:531
25667212425,20sleep30-21swapper/321:19:553
20674212421,83sleep120687-21fschecks_count00:29:431
5193212015,82sleep20-21swapper/221:59:432
8640211919,77sleep30-21swapper/323:49:593
21953211820,79sleep20-21swapper/221:09:362
16814211729,23sleep30-21swapper/320:54:273
16814211729,23sleep30-21swapper/320:54:273
20894211631,44sleep00-21swapper/022:49:360
20894211631,44sleep00-21swapper/022:49:360
30800211534,13sleep30-21swapper/323:19:473
1468221139,18sleep30-21swapper/300:09:543
25672211220,73sleep225691-21cpu19:39:402
19171211123,70sleep019210-21ntpq00:24:490
18366211116,78sleep318439-21switchtime22:39:543
13694211068,21sleep30-21swapper/320:44:263
13694211068,21sleep30-21swapper/320:44:263
24313210932,14sleep30-21swapper/322:59:483
21525210940,14sleep30-21swapper/319:24:553
8455210829,14sleep30-21swapper/322:09:413
32161210725,26sleep332252-21fschecks_time23:24:443
22228210715,76sleep222325-21latency_hist22:54:262
22228210715,76sleep222325-21latency_hist22:54:262
1283421069,19sleep30-21swapper/300:04:493
5509210516,73sleep05555-21ntp_offset21:59:490
17043210520,63sleep30-21swapper/300:19:273
19099210417,69sleep018593-21/usr/sbin/munin20:59:530
30075210315,66sleep230162-21latency_hist19:54:262
556921027,81sleep35608-21ps21:59:523
4604210211,66sleep30-21swapper/320:14:463
1008221029,17sleep30-21swapper/322:14:423
1008221029,17sleep30-21swapper/322:14:423
6756210114,72sleep26862-21grep22:04:442
1206721015,13sleep30-21swapper/300:01:503
4422210024,61sleep04484-21grep20:14:430
12128210014,70sleep012204-21expr22:19:520
12128210014,70sleep012204-21expr22:19:520
340529922,52sleep23561-21unixbench_multi23:34:562
285302988,39sleep328529-21munin-run19:49:263
2674629814,61sleep30-21swapper/321:24:433
96629713,68sleep01038-21swap21:44:550
696529763,16sleep30-21swapper/320:20:153
3209829625,54sleep231617-21apt-get19:59:352
2586829523,58sleep025888-21kernelversion23:04:460
205462955,34sleep30-21swapper/322:48:223
733929426,52sleep07374-21basename23:49:240
1541629419,56sleep215532-21sed22:29:552
1541629419,56sleep215532-21sed22:29:552
569129317,58sleep30-21swapper/323:44:263
486829330,46sleep14992-21latency_hist21:59:261
428929311,17sleep00-21swapper/023:39:390
2968229319,52sleep029823-21grep23:14:560
256129214,19sleep30-21swapper/321:49:553
181429236,33sleep00-21swapper/023:29:580
478729112,20sleep30-21swapper/321:59:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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