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2026-05-28 - 09:28

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 Thu May 28, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11682363511,3611sleep06727-21kworker/0:021:59:590
20437248422,444sleep120486-21/usr/sbin/munin23:03:521
7015242659,201sleep37028-21sshd00:03:593
20834241813,387sleep220872-21ntpq23:04:012
426223986,380sleep3194-21jbd2/mmcblk2p2-20:29:223
23101227590,166sleep323122-21awk19:48:383
138322259101,33sleep313857-21fschecks_count20:59:003
19886224913,211sleep3225-21systemd-journal21:18:373
1208622370,10sleep30-21swapper/319:13:423
1208622370,10sleep30-21swapper/319:13:423
28895223413,23sleep30-21swapper/320:04:563
28895223413,23sleep30-21swapper/320:04:563
25039222134,22sleep30-21swapper/321:33:593
2456322219,200sleep324608-21unin-run21:33:393
16024222014,190sleep116046-21ntpq19:24:021
16024222014,190sleep116046-21ntpq19:24:021
7036220613,177sleep17196-21latency_hist20:38:401
12086220224,24sleep30-21swapper/319:13:433
4838219252,34sleep30-21swapper/322:13:503
9388218812,78sleep30-21swapper/320:44:073
9388218812,78sleep30-21swapper/320:44:073
4877217615,145sleep25002-21awk20:29:452
10299217210,20sleep30-21swapper/300:14:003
30307216817,107sleep30-21swapper/320:09:003
1395216819,130sleep01543-21grep23:44:110
1927321677,77sleep319309-21ntpq22:59:023
11672216617,112sleep311794-21latency_hist20:53:393
2146216430,46sleep31716-21/usr/sbin/munin22:04:053
3001021638,16sleep30-21swapper/323:33:533
11828216216,121sleep211324-21apt-get00:18:472
12709215914,128sleep112734-21df_inode22:38:541
12309215923,99sleep312383-21fschecks_time20:54:483
25787215766,25sleep30-21swapper/323:19:403
25787215766,25sleep30-21swapper/323:19:403
1993215014,114sleep12127-21latency_hist23:48:401
28221214915,43sleep20-21swapper/223:28:392
28221214915,43sleep20-21swapper/223:28:392
5394214816,117sleep05473-21switchtime22:14:070
27594214824,105sleep027745-21sed23:24:090
27594214824,105sleep027745-21sed23:24:090
11382214825,101sleep111476-21latency_hist00:18:381
3194821458,71sleep331959-21uname23:39:013
2682021450,7sleep10-21swapper/121:39:001
16267214391,27sleep30-21swapper/319:24:083
16267214391,27sleep30-21swapper/319:24:083
13759213922,91sleep20-21swapper/219:18:382
2347213611,112sleep02422-21find22:04:110
23750213516,23sleep323799-21irqstats23:13:593
14571213354,58sleep30-21swapper/322:44:013
29380213117,94sleep029500-21head20:05:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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