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2026-09-17 - 04:41

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 Sep 16, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6612131413,1285sleep1680-21/usr/sbin/munin08:42:521
812276312,733sleep3828-21/usr/sbin/munin12:08:113
812276312,733sleep3828-21/usr/sbin/munin12:08:113
31893274219,705sleep031905-21/usr/sbin/munin08:38:110
30605253312,507sleep330649-21ntpq08:33:173
6313252243,462sleep26380-21latency_hist10:42:522
21016229529,142sleep221051-21grep11:28:202
147022957,256sleep2367-21snmpd12:08:302
147022957,256sleep2367-21snmpd12:08:302
112802279105,136sleep211363-21mailstats07:33:232
24158227310,249sleep024225-21systemctl11:38:190
2342322659,240sleep123433-21/usr/sbin/munin11:37:521
97342258109,55sleep20-21swapper/210:53:102
97342258109,55sleep20-21swapper/210:53:102
27766225454,20sleep20-21swapper/208:24:202
20890224162,164sleep220404-21/usr/sbin/munin08:03:192
4111222412,186sleep24241-21unixbench_multi10:33:232
2729222253,124sleep22310-21/usr/sbin/munin12:13:272
27140221210,167sleep227185-21ntpq11:48:152
1013221213,184sleep11053-21processes12:08:171
1013221213,184sleep11053-21processes12:08:171
397522098,162sleep24119-21cat07:12:552
397522098,162sleep24119-21cat07:12:552
15260220830,63sleep20-21swapper/207:47:532
2467220226,138sleep22600-21latency_hist08:47:542
8335220159,125sleep28421-21latency_hist12:32:532
177272201114,30sleep217791-21cat11:18:142
10505219915,142sleep210651-21latency_hist09:12:542
28766219624,57sleep20-21swapper/208:28:072
14086219616,137sleep214154-21latency_hist11:07:522
23525219539,49sleep20-21swapper/208:12:532
2013921919,167sleep220142-21cron08:02:512
5240218713,162sleep35263-21sed12:22:533
30107218710,162sleep230141-21proc_pri10:13:202
2284221779,153sleep222983-21awk11:33:252
5831217223,68sleep15873-21sendmail07:17:511
23640216610,59sleep223679-21proc_pri09:53:212
956216516,126sleep20-21swapper/210:23:222
17217216518,129sleep117326-21latency_hist11:17:531
26110216332,116sleep226260-21latency_hist10:02:542
26905216211,137sleep026984-21find10:03:200
32005215431,86sleep232063-21if_eth008:38:132
185921530,34sleep31863-21unixbench_multi07:03:273
3962213922,101sleep20-21swapper/208:52:512
1798521385,12sleep20-21swapper/209:34:552
30164213610,60sleep20-21swapper/211:58:122
2425213664,17sleep20-21swapper/207:07:542
2132321349,114sleep2367-21snmpd09:47:392
1959921340,14sleep00-21swapper/011:23:200
12408213430,91sleep212410-21apt-get07:38:032
940021327,15sleep00-21swapper/010:52:520
940021327,15sleep00-21swapper/010:52:520
704021327,15sleep27108-21readlink10:43:212
5510213027,64sleep25587-21apt-config08:57:522
1937321298,48sleep20-21swapper/211:23:152
15956212928,62sleep20-21swapper/211:13:092
8079212849,40sleep28092-21apt-get10:48:012
8079212849,40sleep28092-21apt-get10:48:012
30323212739,73sleep20-21swapper/208:33:122
15782212547,41sleep215737-21apt-get07:48:292
9156212122,26sleep30-21swapper/309:08:023
3924212123,77sleep13972-21latency_hist07:12:541
3924212123,77sleep13972-21latency_hist07:12:541
32536212126,60sleep232509-21latency_hist10:22:532
11681212128,51sleep20-21swapper/210:58:192
17722212022,14sleep20-21swapper/207:53:182
11382212013,48sleep211505-21timerwakeupswit09:13:232
24255211926,48sleep20-21swapper/208:13:212
509521185,56sleep20-21swapper/212:21:392
3640211817,73sleep00-21swapper/010:33:130
8437211725,70sleep18578-21grep07:23:241
14255211713,87sleep314293-21/usr/sbin/munin09:23:173
14255211713,87sleep314293-21/usr/sbin/munin09:23:173
25218211618,56sleep20-21swapper/211:43:062
25218211618,56sleep20-21swapper/211:43:062
10554211313,84sleep110656-21latency_hist07:32:531
27698211212,82sleep127765-21systemctl08:24:191
16057211215,16sleep00-21swapper/011:13:110
214221098,65sleep22220-21sed10:28:142
1501421070,7sleep00-21swapper/007:45:110
9393210612,79sleep19451-21irqstats09:08:131
1359421068,63sleep213602-21munin-run09:22:522
1359421068,63sleep213602-21munin-run09:22:522
9004210517,65sleep18072-21/usr/sbin/munin10:48:251
9004210517,65sleep18072-21/usr/sbin/munin10:48:251
16767210533,55sleep216911-21latency_hist09:32:532
28289210312,75sleep328308-21apt-get11:53:003
28289210312,75sleep328308-21apt-get11:53:003
29575210229,54sleep129613-21modprobe11:57:511
29575210229,54sleep129613-21modprobe11:57:511
14410210218,65sleep014479-21grep11:08:100
1664221019,77sleep316770-21/usr/sbin/munin11:13:223
1624210019,54sleep11708-21find07:03:261
2738229810,72sleep027498-21sed11:48:210
2386129815,65sleep123949-21/usr/sbin/munin08:13:121
1532129814,68sleep315471-21cat07:47:543
248029619,62sleep10-21swapper/112:13:221
675229512,66sleep36845-21cat07:18:213
59802956,72sleep20-21swapper/208:57:562
2519329415,29sleep30-21swapper/311:43:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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