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2026-08-08 - 11:17

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 Fri Aug 07, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1442226066,588sleep014461-21ntpq08:42:410
11289235118,317sleep211299-21/usr/sbin/munin08:32:422
11289235118,317sleep211299-21/usr/sbin/munin08:32:422
9013231333,241sleep09021-21awk10:07:460
2702230467,195sleep00-21swapper/008:07:200
184742295141,56sleep00-21swapper/012:22:360
194522283187,43sleep00-21swapper/010:42:180
952622767,230sleep09613-21basename11:52:480
22593225997,24sleep00-21swapper/009:07:490
2161222375,141sleep322107-1kworker/3:1H09:07:193
144862217104,60sleep014489-21cron10:27:160
21915220710,111sleep022043-21timerwakeupswit10:47:470
15005219010,161sleep015150-21latency_hist12:12:180
15005219010,161sleep015150-21latency_hist12:12:180
26283218310,17sleep00-21swapper/009:22:180
20430218212,151sleep020527-21timerandwakeup07:17:530
11364218011,134sleep211402-21idleruntime-cro10:17:162
24469217915,136sleep00-21swapper/010:57:360
24469217915,136sleep00-21swapper/010:57:360
16043217611,152sleep016046-21cron10:32:170
12992217511,150sleep013103-21latency_hist10:22:190
6313216915,97sleep00-21swapper/008:17:420
24735216326,124sleep024786-21cat07:32:430
24735216326,124sleep024786-21cat07:32:430
5821216215,128sleep15865-21ntpq09:57:451
1662121616,107sleep00-21swapper/008:49:070
16563215615,126sleep316628-21mailstats07:07:463
14246215315,126sleep314319-21expr12:07:453
14246215315,126sleep314319-21expr12:07:453
276421518,108sleep02893-21unixbench_multi09:47:510
2623321429,70sleep00-21swapper/007:37:400
1891221420,63sleep218916-21fschecks_time08:57:362
4496214039,63sleep04562-21swap09:53:480
9910213913,48sleep00-21swapper/008:28:360
9910213913,48sleep00-21swapper/008:28:360
16190213918,100sleep316389-21latency_hist10:32:203
18153213711,89sleep018181-21sed07:12:280
18153213711,89sleep018181-21sed07:12:280
2456213630,93sleep00-21swapper/011:31:400
12881213510,81sleep00-21swapper/008:37:410
6128213310,17sleep00-21swapper/009:57:520
572221339,87sleep01-21systemd08:17:170
572221339,87sleep01-21systemd08:17:170
1967221305,30sleep00-21swapper/010:42:260
6458212712,30sleep36494-21ntp_states08:17:453
557121268,70sleep0364-21snmpd11:41:330
28159212521,69sleep20-21swapper/209:27:332
30363212421,56sleep00-21swapper/011:17:180
21532212211,99sleep00-21swapper/009:07:040
19403212138,38sleep219427-21modprobe10:42:162
9872211912,89sleep110015-21cut10:12:191
1525121199,49sleep00-21swapper/012:12:350
30683211811,14sleep00-21swapper/007:52:340
30683211811,14sleep00-21swapper/007:52:340
11477211814,48sleep00-21swapper/008:32:480
11477211814,48sleep00-21swapper/008:32:480
2853821176,13sleep00-21swapper/009:27:440
4578211620,76sleep34626-21grep08:12:403
4578211620,76sleep34626-21grep08:12:403
26799211610,58sleep00-21swapper/009:22:390
26781211520,75sleep126914-21unixbench_singl07:37:531
3038921149,46sleep00-21swapper/007:52:170
2468421148,52sleep01-21systemd09:17:180
16711211418,75sleep116842-21grep07:07:481
27552211311,17sleep00-21swapper/011:07:340
27552211311,17sleep00-21swapper/011:07:340
17832211323,68sleep317862-21modprobe10:37:163
1343211321,72sleep11436-21uniq11:27:371
12306211311,85sleep012371-21ls12:02:370
12306211311,85sleep012371-21ls12:02:370
29833211212,82sleep021555-21kworker/u8:009:32:280
26531211019,75sleep126575-21/usr/sbin/munin09:22:321
16917211024,41sleep00-21swapper/012:17:350
15330211011,21sleep215334-21diskstats12:12:372
23462210933,61sleep00-21swapper/007:27:510
23462210933,61sleep00-21swapper/007:27:510
6087210826,63sleep30-21swapper/311:42:373
27954210714,71sleep327560-21/usr/sbin/munin07:42:443
1715721068,20sleep00-21swapper/008:52:310
11759210615,33sleep311766-21diskstats10:17:343
17158210510,15sleep00-21swapper/010:32:530
3215421047,15sleep00-21swapper/011:22:310
2136821048,60sleep021416-21awk07:22:330
19571210422,61sleep219589-21latency_hist07:17:182
19571210422,61sleep219589-21latency_hist07:17:182
26891210315,60sleep00-21swapper/011:03:300
26891210315,60sleep00-21swapper/011:03:300
1630121039,21sleep016389-21latency07:07:390
3225621027,38sleep00-21swapper/007:57:300
3225621027,38sleep00-21swapper/007:57:300
2147621027,44sleep00-21swapper/012:32:290
2147621027,44sleep00-21swapper/012:32:290
1934121029,37sleep00-21swapper/008:57:470
1058721028,14sleep00-21swapper/011:57:280
1058721028,14sleep00-21swapper/011:57:280
16518210021,55sleep116542-21latency_hist12:17:161
979429835,38sleep39796-21sshd10:12:093
27942989,40sleep00-21swapper/011:32:290
2413129715,69sleep324209-21cat10:57:193
75932968,34sleep00-21swapper/008:22:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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