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2026-05-22 - 07:01

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 Fri May 22, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29403210436,999sleep028740-1kworker/0:0H23:14:170
372329658,883sleep03912-21apt-config21:54:020
8781289017,855sleep28817-21/usr/sbin/munin22:09:182
22801276522,725sleep322851-21/usr/sbin/munin00:34:203
20679271813,692sleep320681-21sshd19:23:073
2887624318,411sleep028912-21ntpq21:29:390
23636240113,371sleep023727-21fschecks_time21:14:210
2393223928,368sleep024049-21cat00:39:010
8999235212,324sleep29040-21/usr/sbin/munin20:29:002
17635230711,252sleep017650-21modprobe00:18:580
1866228211,196sleep01364-21apt-get23:29:150
27548226793,57sleep00-21swapper/019:44:160
65422259113,57sleep00-21swapper/023:44:130
65422259113,57sleep00-21swapper/023:44:130
19683224711,216sleep019715-21fschecks_count22:44:170
14227223965,103sleep014261-21wc20:44:200
17217223638,180sleep017368-21unixbench_singl22:34:320
6296222514,197sleep36322-21latency_hist23:44:003
2766222570,86sleep02788-21awk20:08:590
22637221714,142sleep022417-21latency_hist22:54:020
916321909,166sleep09227-21ps22:09:280
247502183100,37sleep00-21swapper/019:34:270
14843218324,143sleep314857-21awk19:04:303
5678218218,143sleep25826-21grep23:39:312
2116421819,66sleep021306-21head21:04:310
2116421819,66sleep021306-21head21:04:310
3250821807,156sleep00-21swapper/023:24:110
31966218018,139sleep032011-21apt-key19:59:020
3587217929,132sleep33612-21apt-key21:54:013
30075217910,158sleep00-21swapper/019:51:060
24275217510,149sleep024423-21date22:59:030
11831217011,61sleep011836-21cpu22:19:180
7691216924,69sleep07769-21switchtime22:04:280
25773216921,131sleep325775-21cron23:03:593
432216810,14sleep20-21swapper/219:59:492
27393216726,119sleep227533-21unixbench_singl21:24:322
22151216726,42sleep00-21swapper/021:09:200
1579321677,39sleep00-21swapper/020:49:410
28272216192,52sleep00-21swapper/023:09:290
21678215810,134sleep021800-21timerwakeupswit00:29:320
9657215613,124sleep09265-21/usr/sbin/munin20:29:220
14541215421,117sleep114056-21apt-get00:09:101
14541215421,117sleep114056-21apt-get00:09:101
1179221477,71sleep00-21swapper/020:35:080
9229214613,116sleep19299-21sensors22:09:291
2048421455,29sleep00-21swapper/000:25:280
20123214410,49sleep00-21swapper/019:19:450
32398214127,92sleep132395-21apt-get19:59:111
8831213920,99sleep18956-21grep23:49:311
8831213920,99sleep18956-21grep23:49:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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