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2026-08-09 - 13:04

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 50 highest latencies:
System rackbslot7s.osadl.org (updated Fri Aug 07, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1442226066,588sleep014461-21ntpq08:42:410
11289235118,317sleep211299-21/usr/sbin/munin08:32:422
11289235118,317sleep211299-21/usr/sbin/munin08:32:422
9013231333,241sleep09021-21awk10:07:460
2702230467,195sleep00-21swapper/008:07:200
184742295141,56sleep00-21swapper/012:22:360
194522283187,43sleep00-21swapper/010:42:180
952622767,230sleep09613-21basename11:52:480
22593225997,24sleep00-21swapper/009:07:490
2161222375,141sleep322107-1kworker/3:1H09:07:193
144862217104,60sleep014489-21cron10:27:160
21915220710,111sleep022043-21timerwakeupswit10:47:470
15005219010,161sleep015150-21latency_hist12:12:180
15005219010,161sleep015150-21latency_hist12:12:180
26283218310,17sleep00-21swapper/009:22:180
20430218212,151sleep020527-21timerandwakeup07:17:530
11364218011,134sleep211402-21idleruntime-cro10:17:162
24469217915,136sleep00-21swapper/010:57:360
24469217915,136sleep00-21swapper/010:57:360
16043217611,152sleep016046-21cron10:32:170
12992217511,150sleep013103-21latency_hist10:22:190
6313216915,97sleep00-21swapper/008:17:420
24735216326,124sleep024786-21cat07:32:430
24735216326,124sleep024786-21cat07:32:430
5821216215,128sleep15865-21ntpq09:57:451
1662121616,107sleep00-21swapper/008:49:070
16563215615,126sleep316628-21mailstats07:07:463
14246215315,126sleep314319-21expr12:07:453
14246215315,126sleep314319-21expr12:07:453
276421518,108sleep02893-21unixbench_multi09:47:510
2623321429,70sleep00-21swapper/007:37:400
1891221420,63sleep218916-21fschecks_time08:57:362
4496214039,63sleep04562-21swap09:53:480
9910213913,48sleep00-21swapper/008:28:360
9910213913,48sleep00-21swapper/008:28:360
16190213918,100sleep316389-21latency_hist10:32:203
18153213711,89sleep018181-21sed07:12:280
18153213711,89sleep018181-21sed07:12:280
2456213630,93sleep00-21swapper/011:31:400
12881213510,81sleep00-21swapper/008:37:410
6128213310,17sleep00-21swapper/009:57:520
572221339,87sleep01-21systemd08:17:170
572221339,87sleep01-21systemd08:17:170
1967221305,30sleep00-21swapper/010:42:260
6458212712,30sleep36494-21ntp_states08:17:453
557121268,70sleep0364-21snmpd11:41:330
28159212521,69sleep20-21swapper/209:27:332
30363212421,56sleep00-21swapper/011:17:180
21532212211,99sleep00-21swapper/009:07:040
19403212138,38sleep219427-21modprobe10:42:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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