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2026-04-29 - 09:36

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 Wed Apr 29, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
253982233015,2302sleep123737-21kworker/1:223:39:071
253982233015,2302sleep123737-21kworker/1:223:39:071
1374027316,713sleep313763-21ntpq23:00:543
32516250110,475sleep232577-21/usr/sbin/munin00:01:002
2535124080,8sleep10-21swapper/120:11:111
239223946,351sleep32428-21unin-run00:10:303
19649237813,351sleep319675-21latency_hist19:55:313
4813232915,298sleep24806-21apt-get20:50:462
2317923180,11sleep222646-21/usr/sbin/munin23:30:592
2317923180,11sleep222646-21/usr/sbin/munin23:30:592
319162310127,166sleep331521-21/usr/sbin/munin22:15:563
319162310127,166sleep331521-21/usr/sbin/munin22:15:563
23584230311,278sleep323476-21/usr/sbin/munin21:50:483
23584230311,278sleep323476-21/usr/sbin/munin21:50:483
13116226837,33sleep313254-21latency_hist19:35:323
18079225315,214sleep118221-21latency_hist19:50:321
23916224711,222sleep213441-21snmpd21:50:552
23916224711,222sleep213441-21snmpd21:50:552
27937224213,216sleep327976-21cat22:05:303
7218224016,211sleep27242-21grep19:15:482
3081622330,6sleep30-21swapper/320:30:313
21747223114,203sleep321836-21/usr/sbin/munin20:00:523
24638222772,72sleep324313-21apt-get20:10:333
21189222421,187sleep121224-21awk20:00:301
26489222315,194sleep226546-21fschecks_time20:15:492
991222139,182sleep310021-21apt-key22:50:323
991222139,182sleep310021-21apt-key22:50:323
16004221214,173sleep316026-21kernelversion21:25:533
16004221214,173sleep316026-21kernelversion21:25:533
8042221112,171sleep18197-21unixbench_multi00:26:021
5573220935,158sleep35661-21latency_hist00:20:313
7484218412,23sleep37604-21sed22:41:003
29491218421,142sleep30-21swapper/322:10:313
29491218421,142sleep30-21swapper/322:10:313
23260218115,148sleep223295-21date21:50:312
4019217912,155sleep34051-21latency_hist00:15:303
6478217532,132sleep36528-21fschecks_count20:55:523
18399217511,148sleep218474-21fschecks_time19:50:502
39932172126,22sleep30-21swapper/319:05:563
28685217213,123sleep328834-21latency_hist23:50:313
5326216855,29sleep35327-21cpu22:35:473
9122216615,14sleep30-21swapper/322:46:043
8908216555,30sleep38915-21wc00:30:443
6160216313,136sleep36308-21date20:55:323
27701216115,133sleep327725-21cut20:20:303
3275216019,123sleep13334-21unin-run19:05:301
3275216019,123sleep13334-21unin-run19:05:301
1122216014,30sleep20-21swapper/200:05:442
20128215417,53sleep320201-21ls23:21:003
10801215412,101sleep310875-21cat19:25:593
32300215119,36sleep032326-21munin-run20:35:300
3184521459,96sleep331988-21cut00:00:323
25446214539,19sleep30-21swapper/321:55:533
23000214525,106sleep30-21swapper/320:05:413
23000214525,106sleep30-21swapper/320:05:413
9954214417,110sleep30-21swapper/321:05:583
13897214327,97sleep013912-21sh21:20:290
13897214327,97sleep013912-21sh21:20:290
32701214210,86sleep30-21swapper/320:35:493
1609021418,100sleep313441-21snmpd19:44:373
143221417,117sleep01542-21users22:21:020
12401214170,57sleep312512-21latency_hist21:15:313
12401214170,57sleep312512-21latency_hist21:15:313
1774421399,95sleep317778-21ps21:30:583
6554213814,88sleep10-21swapper/100:21:011
17625213812,112sleep01-21systemd19:46:190
2807213712,91sleep30-21swapper/322:26:023
8982213411,78sleep30-21swapper/319:20:543
21018213023,23sleep30-21swapper/321:40:593
22196212816,92sleep022340-21grep20:01:010
3104721240,10sleep131033-21munin-run22:15:291
29497212113,13sleep30-21swapper/323:51:003
16525211810,15sleep00-21swapper/023:10:480
6628211711,91sleep30-21swapper/319:13:073
15260211516,23sleep315279-21netstat23:05:543
3097521135,11sleep00-21swapper/022:15:130
29580211311,88sleep029658-21grep20:25:490
12468211317,77sleep212626-21unixbench_multi22:56:002
1708211210,16sleep30-21swapper/320:40:463
2040721118,90sleep020418-21grep21:40:440
714521087,20sleep37294-21sed00:25:313
7358210710,16sleep30-21swapper/300:25:443
1178921077,14sleep30-21swapper/322:55:453
17710210616,23sleep10-21swapper/123:15:291
7500210512,74sleep30-21swapper/319:15:533
64221049,14sleep30-21swapper/322:20:453
24811210421,65sleep024313-21apt-get20:10:460
24222210312,37sleep30-21swapper/323:35:423
24222210312,37sleep30-21swapper/323:35:423
5630210112,66sleep25522-21/usr/sbin/munin19:10:482
1937121017,13sleep30-21swapper/323:20:323
1305421017,14sleep30-21swapper/321:15:553
1305421017,14sleep30-21swapper/321:15:553
31230210014,68sleep131372-21/usr/sbin/munin23:56:021
15526210015,67sleep215675-21latency_hist21:25:312
2608029927,45sleep226101-21modprobe20:15:292
171442997,15sleep30-21swapper/319:45:583
142672995,36sleep30-21swapper/319:36:053
83982986,35sleep30-21swapper/321:00:573
279992986,12sleep30-21swapper/320:20:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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