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2026-07-31 - 08:39

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 Jul 31, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6172546614,5439sleep222033-21kworker/2:000:03:332
1211726328,609sleep312161-21ntpq19:33:093
1211726328,609sleep312161-21ntpq19:33:093
1044323976,375sleep310515-21latency_hist21:12:463
6421229011,267sleep36434-21awk19:13:193
17369227022,226sleep317516-21unixbench_singl19:48:153
2239225957,19sleep30-21swapper/322:28:053
250502253106,31sleep30-21swapper/320:13:183
115112233128,39sleep311569-21fschecks_count22:58:083
3482221211,186sleep13567-21threads20:48:151
25446221115,181sleep325525-21awk21:58:153
6114220317,165sleep36206-21fschecks_time20:58:053
27593220313,28sleep30-21swapper/323:48:083
27593220313,28sleep30-21swapper/323:48:083
23454219799,82sleep222516-21/usr/sbin/munin23:33:182
14802218912,68sleep014949-21awk21:23:210
14802218912,68sleep014949-21awk21:23:210
19154218814,157sleep119155-21cron23:22:431
6493218322,22sleep10-21swapper/100:23:171
6493218322,22sleep10-21swapper/100:23:171
15442218117,27sleep30-21swapper/319:43:513
18471217819,136sleep30-21swapper/319:53:073
16918217615,146sleep116994-21timerandwakeup23:13:151
15690217515,140sleep30-21swapper/321:28:043
11834216624,118sleep211913-21fschecks_time19:33:042
11834216624,118sleep211913-21fschecks_time19:33:042
21435215811,121sleep30-21swapper/320:03:043
7652215610,135sleep37656-21entropy21:03:023
25378215616,122sleep025411-21idleruntime-cro23:42:440
26342215416,122sleep226460-21timerwakeupswit23:43:152
470521508,131sleep3364-21snmpd22:35:283
28528215013,25sleep00-21swapper/022:08:130
335321498,126sleep33393-21ps20:48:133
30642214910,113sleep30-21swapper/320:32:553
24762214911,30sleep30-21swapper/323:38:153
2145214912,24sleep02149-21df_inode22:28:020
19139214914,20sleep30-21swapper/323:22:333
6704214818,110sleep30-21swapper/300:23:193
6704214818,110sleep30-21swapper/300:23:193
29831214814,90sleep329829-21apt-get22:12:563
14058214712,121sleep114081-21grep21:23:021
14058214712,121sleep114081-21grep21:23:021
13085214412,115sleep013030-21latency_hist19:37:460
13085214412,115sleep013030-21latency_hist19:37:460
1358214316,94sleep30-21swapper/320:43:003
1986421385,10sleep30-21swapper/321:41:123
928721375,12sleep30-21swapper/322:49:203
90332137102,19sleep30-21swapper/300:33:003
224721357,12sleep00-21swapper/020:43:170
32216212814,19sleep20-21swapper/220:37:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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