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2026-03-22 - 23:14

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 Sun Mar 22, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1340529796,961sleep032089-1kworker/0:1H09:28:460
18015259014,560sleep118077-21fschecks_time09:43:001
8609255218,516sleep08701-21/usr/sbin/munin09:13:040
627251512,488sleep1663-21/usr/sbin/munin08:48:021
627251512,488sleep1663-21/usr/sbin/munin08:48:021
29581240839,218sleep1588-21cron08:37:411
32724235231,272sleep1318-21grep12:13:011
201612331130,135sleep120327-21unixbench_multi09:48:131
201612331130,135sleep120327-21unixbench_multi09:48:131
29624233013,200sleep129662-21fschecks_count12:02:591
1553230513,275sleep01637-21memory10:33:050
1553230513,275sleep01637-21memory10:33:050
1208228520,236sleep01227-21apt-get07:07:540
28589228110,259sleep128681-21cat11:58:111
3251422596,243sleep113441-21snmpd08:45:161
1812122450,101sleep11010-21cyclictest07:58:121
1812122450,101sleep11010-21cyclictest07:58:121
9402224417,201sleep39451-21latency_hist07:32:433
26861223749,173sleep126918-21fschecks_count08:28:001
26861223749,173sleep126918-21fschecks_count08:28:001
8464223441,34sleep10-21swapper/107:28:051
25226222219,47sleep10-21swapper/108:22:551
20448222251,18sleep10-21swapper/108:07:451
20448222251,18sleep10-21swapper/108:07:451
14588220411,177sleep314732-21latency_hist09:32:453
25494220147,54sleep125430-21latency_hist10:07:431
972220012,81sleep11043-21sort07:07:431
5220220025,26sleep10-21swapper/107:18:081
5220220025,26sleep10-21swapper/107:18:081
3436219923,162sleep13527-21latency_hist08:57:431
13496218911,66sleep10-21swapper/107:43:151
11442218937,103sleep10-21swapper/109:22:501
6839218555,23sleep10-21swapper/107:23:211
7251218413,156sleep17395-21latency_hist10:52:431
1540721647,117sleep115481-21find09:33:111
16130215249,46sleep10-21swapper/107:53:041
2172215162,24sleep10-21swapper/112:18:051
14073214719,67sleep114112-21fschecks_count11:13:221
16856214622,102sleep10-21swapper/111:22:431
2394121439,122sleep123955-21grep08:18:031
30381213816,109sleep130458-21tr08:38:091
7998213132,85sleep18086-21latency_hist12:37:431
11879213040,76sleep111882-21cron11:07:411
1407212815,64sleep10-21swapper/107:08:031
4523212742,22sleep10-21swapper/107:17:441
21853212721,91sleep021909-21fschecks_count11:38:000
27012212614,98sleep10-21swapper/111:53:111
27012212614,98sleep10-21swapper/111:53:111
22464212633,44sleep122501-21ntpq08:13:061
1044212614,96sleep21193-21modprobe07:07:442
2094721248,103sleep120991-21ntpq08:08:061
7917212220,83sleep31-21systemd12:37:413
3414212217,85sleep10-21swapper/112:23:021
11588211913,51sleep10-21swapper/107:38:061
3214721188,95sleep032089-1kworker/0:1H10:27:520
2934211817,84sleep32939-21/usr/sbin/munin10:38:003
4993211710,53sleep15131-21latency_hist09:02:431
13560211619,78sleep313729-21latency_hist11:12:443
13560211619,78sleep313729-21latency_hist11:12:443
15627211550,15sleep10-21swapper/107:52:441
22036211312,89sleep00-21swapper/009:54:300
22036211312,89sleep00-21swapper/009:54:300
1892421139,36sleep10-21swapper/111:28:041
29450211221,74sleep00-21swapper/010:18:070
2820211249,47sleep32917-21munin-node07:12:453
31445211110,53sleep10-21swapper/110:23:131
21486211118,74sleep321521-21grep09:53:073
21486211118,74sleep321521-21grep09:53:073
509921109,62sleep113441-21snmpd12:28:021
509921109,62sleep113441-21snmpd12:28:021
6793210812,54sleep10-21swapper/109:07:561
6627210819,67sleep26144-21apt-get12:32:522
3356210827,59sleep33403-21munin-run08:57:413
10193210815,72sleep210285-21/usr/sbin/munin09:18:022
10193210815,72sleep210285-21/usr/sbin/munin09:18:022
23681210717,76sleep323732-21cpuspeed08:17:573
2710921059,84sleep00-21swapper/010:11:330
28041210419,66sleep028106-21switchtime10:13:110
2176221039,52sleep10-21swapper/111:37:531
2390921018,57sleep123918-21munin-run10:02:421
2390921018,57sleep123918-21munin-run10:02:421
1340621019,50sleep10-21swapper/109:28:471
971721009,49sleep10-21swapper/107:32:581
971721009,49sleep10-21swapper/107:32:581
3399210016,67sleep23463-21switchtime10:38:112
20791210019,58sleep020918-21latency_hist09:52:440
20791210019,58sleep020918-21latency_hist09:52:440
1034210013,71sleep31110-21latency_hist10:32:433
3263629828,33sleep132680-21processes10:28:091
2531429815,69sleep225377-21fschecks_time08:23:002
12662989,34sleep10-21swapper/110:32:531
12662989,34sleep10-21swapper/110:32:531
466929736,43sleep10-21swapper/110:43:071
1904129718,61sleep319086-21ntp_offset11:28:063
1330429714,63sleep213247-21apt-get09:28:322
749029618,58sleep10-21swapper/110:52:561
648829620,60sleep26492-21cron09:07:412
648829620,60sleep26492-21cron09:07:412
316922968,36sleep10-21swapper/112:08:121
3000529612,62sleep230069-21ps12:03:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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