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2026-03-26 - 12:04

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 26, 2026 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7567264122,600sleep015664-21kworker/u8:023:12:400
26573238156,227sleep126711-21unixbench_multi20:48:001
27530230017,268sleep127605-21fschecks_time20:52:491
29394224810,225sleep029438-21ntpq20:57:530
31992222425,147sleep10-21swapper/119:22:481
31992222425,147sleep10-21swapper/119:22:481
30115221842,122sleep130173-21cut19:17:311
2432822170,9sleep112-21rcu_sched20:42:381
1806122147,45sleep00-21swapper/023:45:520
1806122147,45sleep00-21swapper/023:45:520
1592221414,185sleep31657-21awk22:52:573
6516220814,169sleep16664-21unixbench_singl23:08:011
10016220513,158sleep110067-21sendmail19:57:291
10016220513,158sleep110067-21sendmail19:57:291
9428220213,147sleep10-21swapper/123:17:501
18515219117,153sleep318548-21ntp_kernel_pll_20:22:553
22209218510,158sleep315664-21kworker/u8:023:57:583
155642183110,54sleep10-21swapper/123:37:491
13871218328,139sleep013912-21gpgv21:52:290
12229218235,132sleep112240-21sort23:27:391
2666821769,153sleep126715-21ntpq00:12:541
25548217519,80sleep10-21swapper/122:27:311
7294217444,117sleep17351-21grep19:47:481
7294217444,117sleep17351-21grep19:47:481
2566721746,158sleep113441-21snmpd00:08:381
19542217438,84sleep10-21swapper/122:07:561
22550217112,143sleep222660-21latency_hist20:37:312
4005216710,101sleep14121-21latency_hist23:02:321
26819216415,81sleep10-21swapper/119:07:461
17294216247,26sleep10-21swapper/122:02:311
5901216171,74sleep15890-21munin-run21:27:301
10802216129,96sleep110832-21proc_pri19:58:011
2958921597,104sleep129660-21switchtime20:57:581
30083215243,93sleep130213-21grep00:23:001
20037215213,124sleep220068-21nfs_client20:27:542
1097721529,129sleep111047-21cat23:22:511
1097721529,129sleep111047-21cat23:22:511
16295215121,100sleep215358-21/usr/sbin/munin23:38:022
28989215014,120sleep329008-21apt-get20:57:393
1738214431,54sleep10-21swapper/121:12:521
524921435,72sleep10-21swapper/123:04:131
23153214215,111sleep223181-21netstat20:37:522
5197214012,111sleep05278-21threads21:23:010
15474214010,95sleep115547-21tr20:12:591
24307213710,112sleep024326-21apt-get20:42:380
13778213720,98sleep013797-21apt-get23:32:390
31975213635,84sleep132164-21latency_hist21:07:311
2742621307,108sleep127458-21tune2fs22:32:481
29290212723,49sleep10-21swapper/122:37:561
1727212736,76sleep11852-21timerwakeupswit22:52:591
8071212614,96sleep17545-21/usr/sbin/munin23:13:181
32417212342,43sleep132345-21/usr/sbin/munin21:08:161
14648212312,96sleep314649-21sshd20:11:523
1696321218,94sleep30-21swapper/320:17:543
7518212019,12sleep10-21swapper/121:30:491
7579211921,77sleep27563-21apt-get23:12:462
24097211810,95sleep124096-21munin-run20:42:311
2013821187,100sleep00-21swapper/022:09:530
19088211811,88sleep10-21swapper/123:47:591
19088211811,88sleep10-21swapper/123:47:591
2102321176,12sleep10-21swapper/123:54:121
13913211712,59sleep114002-21gpgv21:52:301
25904211652,47sleep10-21swapper/122:27:471
363821155,11sleep10-21swapper/119:35:241
363821155,11sleep10-21swapper/119:35:241
17339211438,22sleep10-21swapper/123:42:581
17339211438,22sleep10-21swapper/123:42:581
16656211447,22sleep116688-21fschecks_count20:17:481
511521127,96sleep00-21swapper/019:39:060
6973211129,56sleep10-21swapper/119:47:311
31670211114,80sleep131817-21latency_hist19:22:321
12163211022,67sleep212219-21latency20:02:552
12163211022,67sleep212219-21latency20:02:552
1178211019,73sleep21207-21awk21:12:292
4669210929,67sleep14735-21switchtime19:37:581
26496210911,81sleep026570-21find20:47:590
1383621097,80sleep10-21swapper/120:07:551
996210834,27sleep10-21swapper/119:27:451
996210834,27sleep10-21swapper/119:27:451
9513210827,60sleep10-21swapper/121:37:441
24990210837,44sleep224986-21apt-get19:02:422
21279210824,28sleep221337-21munin-run23:57:282
12839210838,21sleep10-21swapper/120:03:301
12839210838,21sleep10-21swapper/120:03:301
3056521077,84sleep130668-21fschecks_time22:42:491
21615210514,28sleep10-21swapper/120:32:541
14524210534,19sleep10-21swapper/121:52:501
1232221049,56sleep112350-21munin-plugin-st21:47:291
2273221015,16sleep10-21swapper/122:18:141
1386210123,55sleep21507-21latency_hist00:37:302
354029910,50sleep13613-21tr21:17:571
6392985,12sleep10-21swapper/122:50:081
2556429820,60sleep125633-21switchtime19:02:581
2578329725,39sleep00-21swapper/022:27:420
2035329725,52sleep10-21swapper/120:28:021
196142978,12sleep30-21swapper/322:07:583
817129611,45sleep10-21swapper/121:32:511
2273429614,64sleep322679-21apt-get22:18:163
2190629611,17sleep00-21swapper/023:57:510
3209929514,59sleep231991-21/usr/sbin/munin22:47:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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