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2026-07-18 - 02:45

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 Jul 17, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13361271013,681sleep37836-21kworker/3:109:44:033
6146266613,603sleep26293-21grep07:39:052
5378250812,339sleep25496-21latency_hist11:03:352
25819237820,340sleep325843-21/usr/sbin/munin10:24:043
2819235511,202sleep22828-21apt-key09:13:372
15181235594,210sleep215327-21unixbench_singl09:49:062
2396023387,320sleep2364-21snmpd12:00:112
3035323318,251sleep2364-21snmpd12:22:112
8493228029,60sleep20-21swapper/209:28:562
19980227795,170sleep220043-21latency08:23:592
19980227795,170sleep220043-21latency08:23:592
14494226557,70sleep214496-21cron08:08:332
14494226557,70sleep214496-21cron08:08:332
30200226179,75sleep230282-21fschecks_time07:13:542
18652222712,198sleep018696-21ntpq08:20:340
18652222712,198sleep018696-21ntpq08:20:340
14388222537,108sleep213591-21/usr/sbin/munin11:29:072
4461221518,179sleep24542-21sort07:34:052
30375221534,159sleep20-21swapper/208:58:352
30375221534,159sleep20-21swapper/208:58:352
18235221444,109sleep20-21swapper/208:19:472
18235221444,109sleep20-21swapper/208:19:472
15159220615,21sleep20-21swapper/211:33:472
28459220330,89sleep228493-21cpu10:33:482
235142203139,21sleep223666-21tail08:34:162
539220246,67sleep2525-21latency_hist07:23:352
10604220216,170sleep210658-21fschecks_count11:18:532
5280219411,163sleep25322-21fschecks_time09:19:142
330321837,163sleep211610-1kworker/2:1H09:13:492
3565218212,49sleep23581-21munin-run10:58:342
7987218018,52sleep20-21swapper/209:28:352
251172178104,26sleep225184-21latency_hist10:23:342
251172178104,26sleep225184-21latency_hist10:23:342
28126217713,73sleep20-21swapper/207:08:452
11443217711,150sleep211525-21latency_hist07:58:352
17334217212,17sleep20-21swapper/209:58:352
21748217018,54sleep20-21swapper/208:29:082
27584216928,116sleep327743-21grep10:29:043
27584216928,116sleep327743-21grep10:29:043
13354216837,16sleep20-21swapper/209:44:022
2805216026,47sleep20-21swapper/212:38:342
8696215912,16sleep10-21swapper/111:13:351
31123215914,128sleep331191-21sendmail_mailtr08:59:043
31123215914,128sleep331191-21sendmail_mailtr08:59:043
864421569,66sleep28678-21munin-run11:13:322
26568214568,20sleep20-21swapper/210:28:022
27399214318,41sleep20-21swapper/212:13:352
367421418,79sleep23828-21latency_hist07:33:362
367421418,79sleep23828-21latency_hist07:33:362
3075521398,15sleep20-21swapper/208:58:552
3075521398,15sleep20-21swapper/208:58:552
679021374,11sleep00-21swapper/011:04:460
679021374,11sleep00-21swapper/011:04:460
2333721365,11sleep20-21swapper/210:16:362
2333721365,11sleep20-21swapper/210:16:362
21089213530,59sleep221119-21awk11:53:332
21089213530,59sleep221119-21awk11:53:332
27588213333,78sleep327669-21apt-config07:08:343
27588213333,78sleep327669-21apt-config07:08:343
744221327,53sleep2360-21ntpd07:44:022
744221327,53sleep2360-21ntpd07:44:022
209921309,38sleep20-21swapper/207:28:362
2592821299,40sleep20-21swapper/208:43:452
27671212740,64sleep027762-21apt-config07:08:350
27671212740,64sleep027762-21apt-config07:08:350
2761021278,38sleep20-21swapper/212:13:482
20434212518,89sleep020483-21grep10:08:340
1920521259,38sleep20-21swapper/210:03:522
5838212328,84sleep25830-21apt-get11:03:472
5838212328,84sleep25830-21apt-get11:03:472
20440212218,88sleep020545-21timerandwakeup11:49:030
20440212218,88sleep020545-21timerandwakeup11:49:030
16977212141,25sleep20-21swapper/211:38:552
23432212011,94sleep123501-21timerandwakeup08:34:151
2417521185,102sleep00-21swapper/012:02:590
6446211720,76sleep00-21swapper/009:23:370
23570211710,91sleep323679-21latency_hist10:18:343
23570211710,91sleep323679-21latency_hist10:18:343
3275021166,98sleep2364-21snmpd10:47:242
9019211378,17sleep20-21swapper/207:49:032
12151211315,81sleep012224-21fschecks_time11:23:520
12151211315,81sleep012224-21fschecks_time11:23:520
22295211211,75sleep00-21swapper/010:13:510
22295211211,75sleep00-21swapper/010:13:510
17570211222,72sleep20-21swapper/209:58:472
11436211216,24sleep30-21swapper/309:38:543
571211012,80sleep0726-21awk12:29:040
21758211011,88sleep221803-21ntp_kernel_pll_11:53:572
21758211011,88sleep221803-21ntp_kernel_pll_11:53:572
15961211011,17sleep30-21swapper/311:34:043
2286921090,6sleep00-21swapper/011:58:350
2286921090,6sleep00-21swapper/011:58:350
11350210722,68sleep20-21swapper/209:38:492
782210625,35sleep20-21swapper/212:29:262
16704210618,70sleep016751-21awk08:14:000
1662210521,64sleep31729-21latency12:33:553
31586210415,20sleep30-21swapper/310:43:503
21898210418,11sleep20-21swapper/210:13:092
3091921039,16sleep20-21swapper/212:23:532
15859210318,10sleep20-21swapper/208:11:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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