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2026-07-22 - 07:03

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 50 highest latencies:
System rackbslot7s.osadl.org (updated Wed Jul 22, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
287932194713,1917sleep228798-21ntp_states20:48:442
28995259314,565sleep329123-21ls20:48:493
284102429387,27sleep128418-21sshd20:48:351
7586242522,386sleep17645-21/usr/sbin/munin23:08:401
8953235037,209sleep39016-21fschecks_time23:13:383
293502254109,30sleep30-21swapper/319:08:483
3896224916,17sleep30-21swapper/322:58:173
31712224823,215sleep3364-21snmpd19:14:413
31712224823,215sleep3364-21snmpd19:14:413
5285222533,70sleep25304-21apt-get21:18:312
5285222533,70sleep25304-21apt-get21:18:312
1740822169,192sleep317419-21sort20:13:303
29488220615,179sleep129604-21sed22:33:491
2402721958,175sleep324066-21ntpq20:33:403
23101219411,168sleep323142-21grep22:13:453
22817219422,147sleep117166-1kworker/1:1H23:58:161
9742219216,27sleep30-21swapper/319:48:353
29493219139,24sleep30-21swapper/300:18:363
29493219139,24sleep30-21swapper/300:18:363
5186219054,31sleep30-21swapper/319:34:193
1175921878,164sleep311902-21latency_hist23:23:193
31572218518,25sleep30-21swapper/300:23:493
15487218513,152sleep30-21swapper/323:34:213
24429217919,25sleep30-21swapper/322:18:373
13313217714,130sleep30-21swapper/321:43:303
616521758,151sleep36201-21ntpq23:03:423
30213217511,34sleep330345-21latency_hist22:38:193
26233216931,114sleep30-21swapper/322:23:463
19133216718,130sleep20-21swapper/220:18:372
10425216618,126sleep30-21swapper/321:33:543
26871215813,18sleep30-21swapper/320:43:373
19106215214,120sleep219232-21sed23:43:482
1502821529,16sleep30-21swapper/323:33:203
8823215019,23sleep30-21swapper/319:43:513
1901321508,17sleep30-21swapper/320:18:303
1257021458,42sleep312659-21switchtime23:23:483
6207214412,118sleep36222-21awk21:18:523
6207214412,118sleep36222-21awk21:18:523
3268921447,123sleep032725-21ntpq19:18:420
3268921447,123sleep032725-21ntpq19:18:420
211962140106,17sleep30-21swapper/320:23:513
12162214021,41sleep30-21swapper/319:54:253
15469213916,23sleep30-21swapper/321:48:473
708021387,17sleep30-21swapper/321:23:403
708021387,17sleep30-21swapper/321:23:403
8524213720,60sleep30-21swapper/323:12:383
6947213715,104sleep17034-21fschecks_time21:23:381
6947213715,104sleep17034-21fschecks_time21:23:381
3145421335,11sleep30-21swapper/322:40:013
2467521335,10sleep30-21swapper/300:03:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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