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2026-06-25 - 23:16

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 20 highest latencies:
System rackbslot7s.osadl.org (updated Thu Jun 25, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9326212238,1200sleep09385-21sendmail-msp07:19:540
8576267627,632sleep08666-21cut10:40:120
3321251914,490sleep23322-21sshd08:41:012
283522444131,138sleep00-21swapper/008:19:550
31157241749,250sleep031278-21latency_hist10:09:550
14493240324,340sleep014545-21if_eth007:35:130
14493240324,340sleep014545-21if_eth007:35:130
3055323348,290sleep030598-21ntpq08:25:200
28985232321,280sleep229126-21grep10:00:282
1530229024,239sleep31663-21grep08:35:253
12486225422,222sleep0364-21snmpd10:50:260
6675224211,192sleep06802-21wc10:34:550
6675224211,192sleep06802-21wc10:34:550
7221222410,192sleep2364-21snmpd08:55:142
7221222410,192sleep2364-21snmpd08:55:142
5218220910,187sleep05260-21latency_hist08:49:550
1995122079,17sleep00-21swapper/009:34:540
1995122079,17sleep00-21swapper/009:34:540
304652206171,21sleep330467-21sshd11:50:013
304652206171,21sleep330467-21sshd11:50:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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