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2026-04-18 - 19:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #6

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 on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack8slot6s.osadl.org (updated Sat Apr 18, 2026 12:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9985991919,0cyclictest65850irq/126-lan12:23:553
9985991918,1cyclictest65850irq/126-lan10:55:163
9985991918,1cyclictest65850irq/126-lan10:40:003
9980991919,0cyclictest16280-21fwupd08:44:222
9985991818,0cyclictest65850irq/126-lan11:41:023
9985991818,0cyclictest65850irq/126-lan11:05:583
9985991818,0cyclictest65850irq/126-lan08:23:543
9985991817,1cyclictest65850irq/126-lan11:35:203
9985991817,1cyclictest65850irq/126-lan09:35:163
9985991817,1cyclictest65850irq/126-lan08:05:333
9985991817,1cyclictest65850irq/126-lan08:04:213
9985991817,1cyclictest65850irq/126-lan07:25:153
9985991717,0cyclictest743-21snmpd11:30:183
9985991717,0cyclictest743-21snmpd10:00:473
9985991717,0cyclictest743-21snmpd09:26:293
9985991717,0cyclictest65850irq/126-lan11:55:143
9985991717,0cyclictest65850irq/126-lan11:50:203
9985991717,0cyclictest65850irq/126-lan09:50:193
9985991717,0cyclictest65850irq/126-lan09:30:323
9985991717,0cyclictest65850irq/126-lan09:23:023
9985991717,0cyclictest65850irq/126-lan09:10:183
9985991717,0cyclictest65850irq/126-lan08:50:123
9985991717,0cyclictest1866-21cat12:05:153
9985991716,1cyclictest65850irq/126-lan11:15:463
9985991616,0cyclictest743-21snmpd10:21:403
9985991616,0cyclictest743-21snmpd07:41:013
9985991616,0cyclictest65850irq/126-lan12:35:183
9985991616,0cyclictest65850irq/126-lan10:08:073
9985991616,0cyclictest65850irq/126-lan09:45:063
9985991616,0cyclictest65850irq/126-lan09:05:093
9985991616,0cyclictest65850irq/126-lan08:55:203
9985991616,0cyclictest65850irq/126-lan08:26:183
9985991615,1cyclictest65850irq/126-lan11:13:463
9985991615,1cyclictest65850irq/126-lan09:16:113
9985991615,1cyclictest65850irq/126-lan07:56:303
9985991615,1cyclictest65850irq/126-lan07:20:003
9985991515,0cyclictest65850irq/126-lan12:30:493
9985991515,0cyclictest65850irq/126-lan12:25:153
9985991515,0cyclictest65850irq/126-lan11:20:413
9985991515,0cyclictest65850irq/126-lan11:04:473
9985991515,0cyclictest65850irq/126-lan10:45:153
9985991515,0cyclictest65850irq/126-lan08:45:193
9985991515,0cyclictest65850irq/126-lan08:35:323
9985991515,0cyclictest65850irq/126-lan08:30:083
9985991515,0cyclictest65850irq/126-lan08:15:153
9985991515,0cyclictest65850irq/126-lan08:14:473
9985991515,0cyclictest65850irq/126-lan07:45:193
9985991514,1cyclictest65850irq/126-lan11:45:183
9985991514,1cyclictest65850irq/126-lan10:30:523
9985991514,1cyclictest65850irq/126-lan10:10:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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