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2026-08-17 - 14:27

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 Mon Aug 17, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77772657211,6544sleep03775-21kworker/0:223:35:080
25239258787,5859sleep119154-21kworker/1:222:46:091
9836252710,500sleep09849-21/usr/sbin/munin23:40:120
11166235111,318sleep111310-21grep23:45:101
14602234821,211sleep114624-21munin-plugin-st22:14:401
14602234821,211sleep114624-21munin-plugin-st22:14:401
26187227813,123sleep126266-21fschecks_time19:25:021
2884221087,35sleep13033-21unixbench_multi21:35:121
1597221018,175sleep11632-21proc_pri23:15:111
25389218512,83sleep124999-21/usr/sbin/munin21:05:051
20764218311,122sleep120811-21grep00:15:091
5448217215,94sleep10-21swapper/121:45:011
2824216911,42sleep10-21swapper/123:19:591
21022216911,112sleep121172-21sed20:50:121
26345216615,106sleep30-21swapper/321:09:433
24751216331,117sleep124809-21latency_hist00:29:421
15273216134,109sleep10-21swapper/122:15:121
15273216134,109sleep10-21swapper/122:15:121
9157216010,40sleep10-21swapper/123:40:011
27061215953,93sleep127086-21awk22:54:401
23469215617,122sleep223463-21apt-get20:59:572
20744215637,99sleep320786-21latency_hist19:09:423
17085215316,22sleep00-21swapper/022:20:120
17085215316,22sleep00-21swapper/022:20:120
19335215253,88sleep119334-21/usr/sbin/munin22:29:421
14429214856,74sleep10-21swapper/120:30:131
893214610,118sleep11015-21latency_hist23:14:421
24306214516,114sleep224316-21systemd19:19:422
22469214524,100sleep120778-21cyclictest22:39:431
27879214214,39sleep127835-21latency_hist00:39:431
8370214019,103sleep0231-21systemd-journal21:54:410
8370214019,103sleep0231-21systemd-journal21:54:410
7405214054,72sleep17556-21date20:09:431
7405214054,72sleep17556-21date20:09:431
11048213912,111sleep111135-21latency20:20:041
1108213611,109sleep01127-21apt-get23:14:540
31318213217,90sleep10-21swapper/121:24:431
25190213138,78sleep10-21swapper/119:20:141
8173213063,40sleep10-21swapper/120:10:111
27200213015,99sleep00-21swapper/021:10:130
25674212915,97sleep125829-21unixbench_multi00:30:151
16156212684,21sleep10-21swapper/100:00:151
1330921265,109sleep00-21swapper/020:26:090
4167212526,18sleep10-21swapper/121:40:051
30564212566,40sleep10-21swapper/119:39:431
32387212415,20sleep10-21swapper/121:25:161
4951212361,23sleep15099-21grep23:25:161
25592212214,93sleep025670-21find00:30:140
4545212016,90sleep24598-21ls19:59:592
4545212016,90sleep24598-21ls19:59:592
32326212013,94sleep132340-21cpu19:45:001
9562211940,63sleep10-21swapper/120:15:081
9562211940,63sleep10-21swapper/120:15:081
19416211941,61sleep10-21swapper/100:10:131
20890211841,16sleep10-21swapper/122:34:421
16211211831,16sleep10-21swapper/120:36:151
7994211617,44sleep18115-21timerwakeupswit23:35:131
12738211516,24sleep10-21swapper/122:05:401
12738211516,24sleep10-21swapper/122:05:401
11801211511,87sleep211770-21latency_hist23:49:432
1074521138,83sleep10-21swapper/122:00:111
26807211217,79sleep326826-21sed00:35:053
23453211116,75sleep123538-21mailstats19:15:091
28363210816,74sleep028360-21apt-get21:14:530
2346821089,17sleep10-21swapper/120:59:561
13830210815,22sleep20-21swapper/222:10:092
13830210815,22sleep20-21swapper/222:10:092
6729210715,70sleep36940-21cut21:49:433
31629210610,25sleep231635-21df_inode21:25:002
409210515,77sleep0460-21latency_hist21:29:420
2040921059,47sleep00-21swapper/020:49:580
13876210534,52sleep313943-21/usr/sbin/munin20:29:593
12529210415,73sleep012682-21head22:05:140
12529210415,73sleep012682-21head22:05:140
4224210025,58sleep0314-21rs:main0
4224210025,58sleep0314-21rs:main0
310432997,77sleep131093-21sed19:40:041
2694029914,25sleep20-21swapper/200:35:082
326812975,12sleep20-21swapper/223:10:162
309462979,75sleep231009-21processes23:05:072
309462979,75sleep231009-21processes23:05:072
1657329713,71sleep116677-21fschecks_time22:20:011
1657329713,71sleep116677-21fschecks_time22:20:011
268829613,69sleep02707-21apt-get23:19:500
2006129618,23sleep30-21swapper/300:14:433
1742429610,73sleep317472-21if_err_eth000:05:183
1625829616,64sleep316196-21latency_hist22:19:433
1625829616,64sleep316196-21latency_hist22:19:433
122142966,11sleep10-21swapper/123:50:021
1092129620,59sleep311072-21sed22:00:133
481529514,61sleep10-21swapper/120:00:061
481529514,61sleep10-21swapper/120:00:061
1884429520,58sleep218940-21uniq00:10:012
1212729514,27sleep00-21swapper/023:50:010
2735229312,15sleep10-21swapper/122:54:571
2005329311,62sleep30-21swapper/320:49:413
2005329311,62sleep30-21swapper/320:49:413
83822929,69sleep10-21swapper/121:54:421
83822929,69sleep10-21swapper/121:54:421
1720529212,14sleep10-21swapper/100:04:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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