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2026-05-03 - 17:19

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 Sun May 03, 2026 12:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6748992929,0cyclictest18578-21fwupd07:37:112
6743992019,1cyclictest65850irq/126-lan12:24:251
6753991818,0cyclictest743-21snmpd10:07:273
6753991818,0cyclictest30015-21cat09:25:153
6743991818,0cyclictest65850irq/126-lan10:30:141
6743991818,0cyclictest65850irq/126-lan07:25:161
6743991817,1cyclictest65850irq/126-lan11:55:121
6743991817,1cyclictest65850irq/126-lan09:21:591
6753991717,0cyclictest743-21snmpd11:09:283
6753991717,0cyclictest743-21snmpd09:22:223
6753991717,0cyclictest743-21snmpd09:16:373
6753991717,0cyclictest743-21snmpd07:58:203
6743991717,0cyclictest65850irq/126-lan11:50:111
6743991716,1cyclictest65850irq/126-lan12:05:271
6743991716,1cyclictest65850irq/126-lan11:30:491
6743991716,1cyclictest65850irq/126-lan11:25:121
6743991716,1cyclictest65850irq/126-lan10:13:351
6743991716,1cyclictest65850irq/126-lan08:05:111
6753991616,0cyclictest743-21snmpd11:57:333
6753991616,0cyclictest743-21snmpd10:18:063
6753991616,0cyclictest743-21snmpd07:46:103
6743991616,0cyclictest65850irq/126-lan08:45:181
6743991616,0cyclictest65850irq/126-lan08:10:121
6743991616,0cyclictest65850irq/126-lan07:45:211
6743991615,1cyclictest65850irq/126-lan11:20:121
6743991615,1cyclictest65850irq/126-lan11:00:141
6743991615,1cyclictest65850irq/126-lan10:22:101
6743991615,1cyclictest65850irq/126-lan09:30:181
6743991615,1cyclictest65850irq/126-lan09:00:171
6743991615,1cyclictest65850irq/126-lan08:35:171
6743991615,1cyclictest65850irq/126-lan08:00:161
6743991615,1cyclictest65850irq/126-lan07:40:201
6743991515,0cyclictest65850irq/126-lan11:10:151
6743991515,0cyclictest65850irq/126-lan11:05:161
6743991515,0cyclictest65850irq/126-lan10:50:171
6743991514,1cyclictest65850irq/126-lan10:40:151
6743991514,1cyclictest65850irq/126-lan10:05:091
6743991514,1cyclictest65850irq/126-lan09:50:161
6743991514,1cyclictest65850irq/126-lan09:25:181
6743991414,0cyclictest65850irq/126-lan12:15:201
6743991414,0cyclictest65850irq/126-lan10:35:171
6743991414,0cyclictest65850irq/126-lan09:45:131
6743991414,0cyclictest65850irq/126-lan08:50:161
6743991414,0cyclictest65850irq/126-lan07:38:101
6743991413,1cyclictest65850irq/126-lan11:15:141
6743991413,1cyclictest65850irq/126-lan09:35:121
6743991413,1cyclictest65850irq/126-lan08:55:161
6743991413,1cyclictest65850irq/126-lan08:40:181
6743991413,1cyclictest65850irq/126-lan08:40:171
6743991413,1cyclictest65850irq/126-lan08:30:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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