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2026-06-02 - 18:55

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 Tue Jun 02, 2026 12:43:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3631993737,0cyclictest4230-21fwupd09:49:411
3643992019,1cyclictest65850irq/126-lan11:15:163
3643991918,1cyclictest65850irq/126-lan10:26:413
3643991918,1cyclictest65850irq/126-lan09:22:043
3643991817,1cyclictest65850irq/126-lan11:25:183
3643991817,1cyclictest65850irq/126-lan11:05:183
3643991817,1cyclictest65850irq/126-lan08:25:213
3643991817,1cyclictest65850irq/126-lan07:45:193
3643991717,0cyclictest65850irq/126-lan12:15:203
3643991717,0cyclictest65850irq/126-lan10:30:103
3643991717,0cyclictest65850irq/126-lan10:15:163
3643991717,0cyclictest65850irq/126-lan08:30:133
3643991717,0cyclictest65850irq/126-lan07:42:263
3643991716,1cyclictest65850irq/126-lan09:05:203
3643991616,0cyclictest65850irq/126-lan12:02:513
3643991616,0cyclictest65850irq/126-lan11:55:173
3643991616,0cyclictest65850irq/126-lan10:50:283
3643991616,0cyclictest65850irq/126-lan09:50:003
3643991616,0cyclictest65850irq/126-lan09:40:203
3643991616,0cyclictest65850irq/126-lan09:15:183
3643991616,0cyclictest65850irq/126-lan08:43:573
3643991616,0cyclictest65850irq/126-lan08:23:083
3643991616,0cyclictest65850irq/126-lan08:05:153
3643991616,0cyclictest65850irq/126-lan07:59:183
3643991616,0cyclictest65850irq/126-lan07:27:273
3643991615,1cyclictest65850irq/126-lan12:10:143
3643991615,1cyclictest65850irq/126-lan10:35:153
3643991615,1cyclictest65850irq/126-lan10:20:193
3643991615,1cyclictest65850irq/126-lan09:55:133
3643991615,1cyclictest65850irq/126-lan09:10:143
3643991615,1cyclictest65850irq/126-lan09:00:163
3643991615,1cyclictest65850irq/126-lan07:30:143
3643991615,1cyclictest65850irq/126-lan07:30:133
3643991615,1cyclictest65850irq/126-lan07:10:153
3643991515,0cyclictest65850irq/126-lan12:35:163
3643991515,0cyclictest65850irq/126-lan12:30:193
3643991515,0cyclictest65850irq/126-lan10:12:273
3643991515,0cyclictest65850irq/126-lan09:29:563
3643991515,0cyclictest65850irq/126-lan08:50:153
3643991515,0cyclictest65850irq/126-lan08:10:073
3643991515,0cyclictest65850irq/126-lan07:20:123
3643991514,1cyclictest65850irq/126-lan11:00:103
3643991514,1cyclictest65850irq/126-lan08:40:003
3643991514,1cyclictest65850irq/126-lan07:15:113
3643991414,0cyclictest65850irq/126-lan11:50:133
3643991414,0cyclictest65850irq/126-lan11:45:113
3643991414,0cyclictest65850irq/126-lan11:10:173
3643991414,0cyclictest65850irq/126-lan10:43:543
3643991414,0cyclictest65850irq/126-lan08:45:133
3643991413,1cyclictest65850irq/126-lan12:05:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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