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2026-08-23 - 18:08

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 Aug 23, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
118322700013,6973sleep330483-21kworker/3:212:29:573
20883217388,1714sleep120905-21users11:14:531
6782213409,1306sleep16847-21/usr/sbin/munin12:14:491
20488283126,791sleep120533-21ntpq07:49:431
19528267716,644sleep019530-21sshd11:11:570
3215245721,419sleep33304-21perl12:04:373
28317239817,249sleep128368-21sendmail09:59:171
24173233710,310sleep224230-21/usr/sbin/munin09:44:402
150562327115,195sleep115243-21latency_hist07:34:201
7433231115,279sleep07519-21fw_packets10:34:380
2101228723,87sleep22131-21modprobe10:19:172
95872285101,129sleep19698-21timerandwakeup07:14:501
157732284245,25sleep315775-21sshd09:17:563
157732284245,25sleep315775-21sshd09:17:563
5992242108,23sleep10-21swapper/110:14:191
3727223817,205sleep33836-21sed10:24:193
6214223531,181sleep16253-21wc10:29:461
179872235124,51sleep118093-21apt-config11:09:191
27978222712,99sleep128036-21fschecks_count08:14:381
2684022269,202sleep126952-21cat11:34:471
586522190,68sleep16781-21cyclictest08:44:501
3025221810,134sleep13132-21timerandwakeup10:19:491
10196221714,149sleep110320-21latency_hist10:44:201
10196221714,149sleep110320-21latency_hist10:44:201
16701221518,150sleep116722-21modprobe07:39:171
3267219715,155sleep03413-21latency_hist08:39:200
30457219013,163sleep330511-21sed10:04:403
19180218825,128sleep119292-21sed07:44:501
1671218620,58sleep11758-21fschecks_time11:59:391
11242218531,92sleep111383-21sed07:19:511
11242218531,92sleep111383-21sed07:19:511
3126921717,103sleep131308-21ntpq11:49:411
3126921717,103sleep131308-21ntpq11:49:411
26315217017,138sleep226388-21fschecks_time11:34:362
29151216912,135sleep129296-21latency_hist11:44:201
23807215417,120sleep323931-21sed11:24:483
7990215319,111sleep38135-21sed10:34:493
11470215356,63sleep110988-21apt-get09:04:251
2168321519,128sleep121777-21fschecks_time11:19:371
13630214811,42sleep00-21swapper/007:29:310
10520214810,95sleep110587-21fschecks_time10:44:361
10520214810,95sleep110587-21fschecks_time10:44:361
9859214728,104sleep19336-21/usr/sbin/munin12:24:461
11283214379,18sleep10-21swapper/112:29:431
4192214210,23sleep00-21swapper/008:39:490
13536214116,104sleep10-21swapper/110:54:331
13529214162,55sleep10-21swapper/109:09:461
3677213910,113sleep13751-21switchtime12:04:481
19075213918,19sleep10-21swapper/109:29:211
16005213926,77sleep116157-21cut09:19:191
23341213729,49sleep123393-21if_eth011:24:381
29678213630,47sleep129721-21if_err_eth008:19:381
16873213616,100sleep10-21swapper/109:19:481
93421347,116sleep1367-21snmpd11:55:101
93421347,116sleep1367-21snmpd11:55:101
789421339,63sleep10-21swapper/108:54:201
1911213213,101sleep10-21swapper/108:34:331
5220213127,42sleep10-21swapper/112:09:481
26821213127,45sleep126962-21sed09:54:201
26319212713,63sleep10-21swapper/108:09:291
12663212711,97sleep212716-21/usr/sbin/munin12:34:372
417521259,74sleep14194-21apt-get10:24:291
417521259,74sleep14194-21apt-get10:24:291
712721228,78sleep17213-21fschecks_time07:09:371
17917212221,81sleep317932-21modprobe11:09:173
6698212136,63sleep16721-21apt07:09:171
911621208,72sleep19144-21latency_hist12:24:181
8647211738,20sleep10-21swapper/110:39:191
29374211740,31sleep129520-21unixbench_singl09:59:501
9467211519,77sleep3231-21systemd-journal08:59:183
9467211519,77sleep3231-21systemd-journal08:59:183
30659211221,78sleep330684-21latency_hist11:49:193
8107211021,68sleep28108-21/usr/sbin/munin08:54:292
8107211021,68sleep28108-21/usr/sbin/munin08:54:292
5409211018,73sleep35549-21unixbench_singl12:09:503
2577321105,30sleep10-21swapper/108:05:421
32522210921,64sleep232528-21modprobe08:29:172
26105210813,82sleep026144-21cut08:09:200
29158210722,67sleep029195-21basename08:19:170
2587421077,64sleep1367-21snmpd11:33:301
1657210712,79sleep01670-21fschecks_count11:59:380
1210421078,57sleep10-21swapper/107:24:311
22098210633,50sleep022137-21modprobe09:39:170
8972210515,74sleep29008-21fschecks_count10:39:362
8972210515,74sleep29008-21fschecks_count10:39:362
28260210517,73sleep228294-21ntp_kernel_err08:14:432
16371210518,71sleep316396-21awk11:04:163
11523210517,71sleep311494-21apt-get09:04:483
7908210411,79sleep08010-21grep12:19:360
22392210428,17sleep122506-21awk07:54:511
1844921048,62sleep118443-21apt-get11:09:311
28410210324,28sleep20-21swapper/211:39:492
10831210313,76sleep010881-21sed07:19:410
10831210313,76sleep010881-21sed07:19:410
347621027,78sleep10-21swapper/108:39:291
1591210135,50sleep10-21swapper/108:33:561
2446521006,62sleep1367-21snmpd08:03:481
1091229816,66sleep010913-21/usr/sbin/munin12:29:340
3055829726,18sleep10-21swapper/110:04:421
2627829614,67sleep326407-21/usr/sbin/munin09:49:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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