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2026-08-26 - 19:07

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 Wed Aug 26, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211332102738,10232sleep120958-21kworker/1:112:13:151
263952808410,8062sleep219648-21kworker/2:212:29:142
29271274217,714sleep212196-21kworker/2:210:55:152
11149263317,598sleep211197-21/usr/sbin/munin11:39:372
2370826067,563sleep123749-21ntpq12:19:321
1407525448,520sleep114056-21latency_hist10:09:081
1407525448,520sleep114056-21latency_hist10:09:081
2348825347,519sleep212574-1kworker/2:0H08:54:282
3732240725,348sleep1367-21snmpd11:17:431
28779237915,265sleep128818-21wc10:54:381
2377623177,259sleep123823-21ntpq08:54:351
27848228488,131sleep10-21swapper/109:09:081
25034227315,240sleep325062-21/usr/sbin/munin07:19:083
9277226816,235sleep39279-21sshd09:53:153
3229622617,242sleep132370-21find11:04:431
15354224538,155sleep115425-21fschecks_time11:54:251
1746223214,202sleep21879-21awk11:09:452
31197221712,194sleep131217-21apt-get09:19:171
4788221430,131sleep14912-21ls11:19:371
1577221312,121sleep11586-21modprobe09:29:071
283982211144,52sleep128408-21modprobe07:29:071
283982211144,52sleep128408-21modprobe07:29:071
24048220712,182sleep324097-21ntpq10:39:303
24048220712,182sleep324097-21ntpq10:39:303
14120220645,124sleep114164-21ntpq11:49:331
22365220272,58sleep10-21swapper/107:09:371
10077219611,135sleep10-21swapper/108:14:091
28772218516,149sleep328801-21fschecks_count07:29:253
28772218516,149sleep328801-21fschecks_count07:29:253
28186218313,155sleep228281-21fschecks_time09:09:252
22183217348,65sleep112-21rcu_sched10:34:271
18994217347,55sleep121603-21cyclictest10:24:221
10250216633,49sleep10-21swapper/109:54:381
618121659,56sleep10-21swapper/111:24:341
618121659,56sleep10-21swapper/111:24:341
28434215611,15sleep10-21swapper/112:34:341
18266215636,15sleep10-21swapper/108:39:201
770215311,14sleep00-21swapper/009:24:330
26529215333,42sleep10-21swapper/110:49:091
12417215218,116sleep112026-21/usr/sbin/munin08:19:301
18776214747,59sleep118919-21cat10:24:101
3710214578,52sleep13719-21modprobe07:54:061
31396214315,68sleep10-21swapper/111:04:061
17242214322,49sleep10-21swapper/111:59:301
14919214118,60sleep10-21swapper/110:09:361
14919214118,60sleep10-21swapper/110:09:361
17043213962,21sleep10-21swapper/108:34:321
23883213717,106sleep223952-21switchtime12:19:372
21710213530,84sleep221217-21apt-get12:14:172
27037213311,59sleep127108-21latency10:49:291
2150421310,16sleep0231-21systemd-journal07:09:060
2150421310,16sleep0231-21systemd-journal07:09:060
3585213016,42sleep10-21swapper/109:34:271
2308621269,63sleep123141-21ls12:19:081
3304212416,86sleep23447-21unixbench_singl11:14:372
27597212413,91sleep027631-21/usr/sbin/munin07:25:390
27597212413,91sleep027631-21/usr/sbin/munin07:25:390
2399212462,17sleep10-21swapper/109:29:351
24847212312,95sleep024867-21apt-get12:24:160
20224212347,47sleep120221-21apt-get07:04:201
20224212347,47sleep120221-21apt-get07:04:201
11307212366,16sleep10-21swapper/109:59:271
11307212366,16sleep10-21swapper/109:59:271
29399212230,76sleep129517-21latency_hist09:14:091
25547212114,84sleep20-21swapper/208:59:362
19121211719,76sleep00-21swapper/012:04:380
26743211519,38sleep20-21swapper/210:49:182
7132211410,16sleep30-21swapper/308:04:223
23756211447,50sleep10-21swapper/110:39:241
23756211447,50sleep10-21swapper/110:39:241
10870211447,26sleep110915-21ntp_offset08:14:381
12047211321,68sleep20-21swapper/208:19:192
2471210818,73sleep22549-21/usr/sbin/munin09:29:362
23693210814,78sleep00-21swapper/012:19:310
22678210811,15sleep00-21swapper/010:34:380
21483210836,46sleep321498-21modprobe07:09:063
21483210836,46sleep321498-21modprobe07:09:063
9510210647,19sleep10-21swapper/111:34:351
21244210615,75sleep321245-21sshd08:48:153
1626921057,66sleep10-21swapper/108:32:261
24379210426,26sleep10-21swapper/107:14:371
26122210372,14sleep10-21swapper/107:19:381
23495210313,74sleep023587-21perl08:54:300
31572210245,45sleep131583-21ls07:39:081
21206210243,43sleep121332-21sed10:29:391
21206210243,43sleep121332-21sed10:29:391
16237210117,70sleep316278-21ntp_kernel_pll_10:14:313
2773629915,71sleep027831-21latency_hist12:34:090
2661429915,52sleep20-21swapper/209:04:252
1644929915,65sleep216556-21latency_hist08:34:092
2749729725,52sleep227532-21latency07:25:372
2749729725,52sleep227532-21latency07:25:372
3181429614,66sleep331897-21tune2fs11:04:333
3231629538,16sleep10-21swapper/107:39:371
2963929512,25sleep20-21swapper/209:14:222
2917529539,44sleep129261-21mailstats07:29:351
2917529539,44sleep129261-21mailstats07:29:351
2657929516,24sleep10-21swapper/112:29:251
2518229560,18sleep10-21swapper/108:59:271
2011029539,14sleep10-21swapper/108:45:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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