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2026-06-12 - 13:31

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 Jun 12, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3360273621,697sleep03416-21/usr/sbin/munin21:58:080
22606255226,400sleep322655-21basename21:17:443
21193233611,309sleep021267-21find19:28:150
21193233611,309sleep021267-21find19:28:150
27638230431,259sleep227644-21df_inode21:33:012
609229015,250sleep1696-21tune2fs23:33:041
18345228577,94sleep318407-21fschecks_time21:03:223
16730225410,206sleep316773-21ntp_kernel_pll_00:23:223
248502250123,26sleep30-21swapper/321:23:093
13990224552,140sleep314021-21munin-plugin-st22:32:443
1151222840,124sleep30-21swapper/321:52:453
10026222095,28sleep30-21swapper/322:18:303
9688220816,170sleep09774-21latency_hist20:37:460
16001220612,149sleep316094-21fschecks_time19:13:043
21119220312,144sleep321261-21latency_hist21:12:473
21119220312,144sleep321261-21latency_hist21:12:473
13437219078,69sleep313463-21netstat20:48:073
21895218313,132sleep321994-21latency_hist19:32:473
21895218313,132sleep321994-21latency_hist19:32:473
1069218331,134sleep31148-21sort23:33:143
8620218217,146sleep10-21swapper/120:33:071
430921817,124sleep30-21swapper/320:18:143
1012821817,38sleep30-21swapper/300:03:073
1012821817,38sleep30-21swapper/300:03:073
26484217915,146sleep326635-21latency_hist23:12:463
12834217844,19sleep30-21swapper/320:47:473
19646217628,133sleep319741-21cat19:23:143
817321736,133sleep38209-21ntpq22:13:093
11797217113,53sleep30-21swapper/300:08:243
5322216435,113sleep30-21swapper/322:03:163
5322216435,113sleep30-21swapper/322:03:163
2914321627,38sleep30-21swapper/321:37:593
14408215819,112sleep30-21swapper/322:33:043
6892215710,64sleep36982-21sshd20:28:043
31797215588,49sleep30-21swapper/323:28:093
31452215147,59sleep30-21swapper/320:02:563
2908215016,114sleep30-21swapper/321:57:463
2908215016,114sleep30-21swapper/321:57:463
16980214852,25sleep30-21swapper/320:58:133
16980214852,25sleep30-21swapper/320:58:133
23390214715,113sleep323393-21cron19:37:433
23390214715,113sleep323393-21cron19:37:433
665021469,80sleep36686-21ntpq22:08:083
665021469,80sleep36686-21ntpq22:08:083
3462214648,86sleep33528-21date20:17:463
26556214430,60sleep30-21swapper/319:47:453
5352214220,102sleep30-21swapper/323:48:043
20687214180,18sleep30-21swapper/300:37:443
20687214180,18sleep30-21swapper/300:37:443
29895214027,98sleep329902-21basename19:57:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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