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2026-03-12 - 22:31

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 Thu Mar 12, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1686622242615,22394sleep014334-21kworker/u8:307:13:430
6258252058,5184sleep36186-21kworker/3:210:06:363
2553427857,765sleep325572-21ntpq09:23:413
2553427857,765sleep325572-21ntpq09:23:413
3164527617,699sleep331787-21cat11:28:183
8115275620,718sleep28148-21/usr/sbin/munin08:28:382
1486227458,725sleep314894-21ntpq10:33:403
1486227458,725sleep314894-21ntpq10:33:403
3849255816,526sleep03943-21/usr/sbin/munin09:58:380
1951325369,511sleep219558-21ntpq10:48:412
1940024766,460sleep313441-21snmpd07:19:313
7113244761,372sleep36176-21/usr/sbin/munin08:23:513
31441240098,209sleep331479-21fschecks_count09:43:353
12908234358,191sleep30-21swapper/310:28:323
12908234358,191sleep30-21swapper/310:28:323
17139231023,270sleep217170-21memory12:23:392
21846229921,255sleep121861-21cut09:13:341
21846229921,255sleep121861-21cut09:13:341
35022978,275sleep0390-21ntpq08:03:410
6201229316,259sleep16250-21/usr/sbin/munin08:23:321
31235229317,193sleep30-21swapper/307:58:393
3257226167,88sleep33286-21modprobe09:58:163
5260224616,210sleep35365-21timerandwakeup08:18:463
31965224666,99sleep331979-21fschecks_count11:28:343
18654222531,182sleep318655-21cpu09:03:303
17614219616,160sleep117706-21unixbench_multi07:14:121
18817219573,53sleep30-21swapper/312:28:453
21241219042,133sleep321328-21latency_hist12:38:173
27338218716,95sleep30-21swapper/311:13:413
21364218272,86sleep30-21swapper/310:53:473
974218178,72sleep30-21swapper/311:33:313
32397218029,58sleep30-21swapper/308:03:283
29002217122,126sleep129013-21sh07:53:161
9684216612,95sleep30-21swapper/311:58:463
9684216612,95sleep30-21swapper/311:58:463
17368216510,134sleep317432-21latency08:58:383
1082121649,143sleep213441-21snmpd10:20:032
14841215929,115sleep314891-21cat07:08:373
1889721518,131sleep318964-21latency_hist10:48:183
684421497,107sleep00-21swapper/008:23:480
10554214215,111sleep00-21swapper/008:38:170
25177214116,109sleep125141-21latency_hist11:08:181
2384021417,47sleep30-21swapper/311:03:273
23628214042,60sleep323764-21latency_hist11:03:193
20491214044,51sleep30-21swapper/309:08:393
20445214056,18sleep30-21swapper/310:53:183
15342213918,104sleep315431-21grep12:18:363
17167213743,74sleep30-21swapper/310:41:353
17167213743,74sleep30-21swapper/310:41:353
11553213410,111sleep311706-21awk08:38:483
1895213333,77sleep30-21swapper/308:08:413
13336213311,107sleep013354-21grep07:03:380
1048221338,72sleep310607-21cat10:18:473
29951213257,16sleep30-21swapper/307:53:473
23593212518,91sleep123577-21apt-get09:18:341
23593212518,91sleep123577-21apt-get09:18:341
3444212410,95sleep33485-21ntpq08:13:413
9574212236,67sleep30-21swapper/310:18:183
25009211811,89sleep125018-21/usr/sbin/munin07:38:391
29892211351,23sleep30-21swapper/309:38:343
11452211210,43sleep30-21swapper/310:23:353
18716211014,78sleep218725-21/usr/sbin/munin12:28:402
929621088,86sleep39342-21grep08:33:313
30095210735,16sleep30-21swapper/311:23:173
30095210735,16sleep30-21swapper/311:23:173
6948210649,22sleep36988-21latency10:08:383
31880210630,49sleep231876-21apt-get11:28:292
3153621069,82sleep231638-21timerwakeupswit07:58:472
5888210317,11sleep30-21swapper/311:48:323
5888210317,11sleep30-21swapper/311:48:323
29052210315,52sleep30-21swapper/307:53:183
13040210117,67sleep113045-21sort07:03:271
4887210015,69sleep24923-21/usr/sbin/munin08:18:372
23233210031,17sleep30-21swapper/307:33:363
23233210031,17sleep30-21swapper/307:33:363
386329913,64sleep20-21swapper/211:43:192
386329913,64sleep20-21swapper/211:43:192
236122998,61sleep30-21swapper/309:18:483
236122998,61sleep30-21swapper/309:18:483
1819529929,18sleep30-21swapper/307:18:183
312102989,76sleep231239-21users11:23:492
676229721,51sleep06827-21fschecks_time10:08:340
79552967,45sleep30-21swapper/308:28:353
1113929630,53sleep311223-21cat12:03:463
1113929630,53sleep311223-21cat12:03:463
108042967,80sleep00-21swapper/010:19:490
2152629527,19sleep321518-21apt-get07:28:323
2152629527,19sleep321518-21apt-get07:28:323
2895729417,58sleep013441-21snmpd09:33:470
268929421,47sleep22845-21grep09:53:472
743729312,38sleep30-21swapper/311:53:333
333929327,52sleep13428-21/usr/sbin/munin08:13:391
2688329316,58sleep027020-21unixbench_multi07:43:510
2210629314,65sleep022181-21grep07:28:490
2210629314,65sleep022181-21grep07:28:490
267612929,40sleep30-21swapper/309:28:333
835329118,54sleep08456-21timerandwakeup08:28:440
1707229120,54sleep117138-21wc12:23:381
1656229116,59sleep116602-21cut12:23:181
1261829124,45sleep012645-21modprobe10:28:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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