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2026-04-07 - 09:17

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 Tue Apr 07, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
68062117916,1141sleep326257-21kworker/u8:020:42:053
2069269512,669sleep02161-21sshd23:52:100
1904725016,456sleep219082-21ntpq23:02:122
31688242547,326sleep231837-21grep20:17:202
29071241535,257sleep2222-21systemd-journal20:11:472
17749239818,361sleep117765-21fschecks_count21:17:081
1960228315,191sleep22102-21head22:07:212
4474227719,238sleep04526-21fschecks_time22:17:080
17421227031,202sleep217381-21latency_hist21:16:492
933225430,195sleep1958-21modprobe22:06:471
3342223718,205sleep13416-21cat22:12:161
3051222945,133sleep20-21swapper/220:31:502
21065221926,63sleep221104-21modprobe19:46:472
884321828,135sleep20-21swapper/200:12:112
23560217829,128sleep323555-21apt-get23:16:593
3306217252,65sleep23394-21apt-key23:56:482
12122216718,136sleep112127-21cat19:17:061
30017216440,71sleep230069-21munin-plugin-st21:56:472
9218216318,127sleep29326-21unixbench_multi19:07:182
629621628,140sleep36332-21ntpq22:22:113
13053216243,104sleep213067-21fschecks_count21:02:072
8073215912,55sleep20-21swapper/222:27:152
10820215826,118sleep213441-21snmpd22:37:012
10820215826,118sleep213441-21snmpd22:37:012
4117215612,81sleep20-21swapper/222:16:502
4076215416,123sleep04151-21timerandwakeup20:33:340
7172215132,73sleep20-21swapper/200:07:102
29996215130,80sleep230120-21timerwakeupswit20:12:202
14952215114,119sleep20-21swapper/200:32:102
14137215130,70sleep20-21swapper/219:22:162
988214916,112sleep01112-21latency_hist22:06:500
5901214431,70sleep25953-21cpuspeed22:22:022
1869421446,125sleep2191-21jbd2/mmcblk2p2-21:18:552
15342214418,93sleep10-21swapper/119:27:081
9813214245,53sleep20-21swapper/220:51:572
1449321399,15sleep20-21swapper/200:31:492
2635221356,72sleep20-21swapper/220:02:062
4630213412,70sleep24645-21modprobe20:36:472
20171213217,45sleep20-21swapper/223:06:572
25937213011,66sleep226140-21apt-config20:01:502
16444213017,96sleep316418-21latency_hist19:31:503
32106212954,47sleep20-21swapper/222:02:002
31290212944,60sleep20-21swapper/221:57:442
27971212819,87sleep328022-21latency_hist23:31:493
381321266,107sleep23788-21apt-get23:57:122
11095212221,83sleep3222-21systemd-journal20:56:473
25636212011,53sleep20-21swapper/221:41:572
2721321197,96sleep20-21swapper/221:47:012
25737211819,80sleep3292-21in:imuxsock20:01:473
21444211816,27sleep121535-21perl19:47:071
26872211749,21sleep20-21swapper/223:27:082
19818211738,20sleep20-21swapper/221:22:182
11238211729,74sleep211099-21cron20:56:502
9814211511,22sleep00-21swapper/019:11:480
29336211514,85sleep129428-21sed21:52:171
2453021146,29sleep20-21swapper/223:18:072
29919211315,84sleep129993-21switchtime20:12:191
6077211221,64sleep36221-21grep00:02:183
1366821126,12sleep10-21swapper/100:27:161
780621115,30sleep10-21swapper/100:07:211
12133211111,83sleep212203-21switchtime00:22:162
25651211015,74sleep325722-21/usr/sbin/munin23:22:163
157721105,29sleep20-21swapper/223:50:222
1641121087,11sleep20-21swapper/222:52:432
15159210818,70sleep015224-21grep00:32:160
5777210715,71sleep15846-21/usr/sbin/munin20:37:181
12848210616,75sleep012910-21sendmail_mailqu22:42:160
16431210515,72sleep116446-21/usr/sbin/munin21:12:111
12978210324,57sleep20-21swapper/222:42:182
18685210210,80sleep018687-21sshd21:18:490
27014210115,70sleep327160-21cat21:46:503
30699210013,74sleep330718-21latency_hist20:16:493
2864421006,29sleep20-21swapper/223:32:132
451229922,56sleep03768-21/usr/sbin/munin23:57:470
2183729953,12sleep20-21swapper/219:47:162
1133729947,12sleep20-21swapper/200:21:482
66829813,31sleep3695-21irqstats23:47:083
456729846,14sleep20-21swapper/222:17:102
2626829823,62sleep326295-21grep20:02:033
2211329812,69sleep022152-21ntpq23:12:120
2211329812,69sleep022152-21ntpq23:12:120
515429736,25sleep20-21swapper/220:37:072
843729611,68sleep08506-21idleruntime20:47:070
93202949,18sleep30-21swapper/322:32:053
93202949,18sleep30-21swapper/322:32:053
3229229411,65sleep332350-21idleruntime22:02:093
2644329423,44sleep026592-21latency_hist23:26:500
2422529425,58sleep224235-21munin-run19:56:492
2422529425,58sleep224235-21munin-run19:56:492
118229416,61sleep11323-21uptime23:47:181
982729220,45sleep19831-21munin-node19:11:491
942729125,49sleep20-21swapper/222:32:082
942729125,49sleep20-21swapper/222:32:082
3154429124,15sleep28270-21cyclictest23:42:102
2666529116,33sleep00-21swapper/023:27:020
2408429138,14sleep20-21swapper/221:36:522
226592919,65sleep322717-21cat19:51:493
789428915,63sleep20-21swapper/220:45:312
339628820,48sleep33492-21sed23:56:493
323228828,40sleep13255-21munin-run23:56:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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