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2026-05-20 - 00:31

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 100 highest latencies:
System rack8slot6s.osadl.org (updated Tue May 19, 2026 12:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30812991818,0cyclictest65850irq/126-lan11:18:403
30812991818,0cyclictest65850irq/126-lan10:50:243
30812991818,0cyclictest65850irq/126-lan10:10:113
30812991818,0cyclictest65850irq/126-lan09:29:413
30812991818,0cyclictest65850irq/126-lan07:46:273
30812991818,0cyclictest65850irq/126-lan07:40:183
30812991717,0cyclictest65850irq/126-lan11:45:113
30812991717,0cyclictest65850irq/126-lan10:07:483
30812991717,0cyclictest65850irq/126-lan09:24:003
30812991717,0cyclictest65850irq/126-lan08:15:133
30812991717,0cyclictest65850irq/126-lan08:10:143
30812991717,0cyclictest65850irq/126-lan07:30:153
30812991616,0cyclictest65850irq/126-lan12:30:133
30812991616,0cyclictest65850irq/126-lan12:25:173
30812991616,0cyclictest65850irq/126-lan12:21:523
30812991616,0cyclictest65850irq/126-lan11:55:153
30812991616,0cyclictest65850irq/126-lan11:20:123
30812991616,0cyclictest65850irq/126-lan11:05:143
30812991616,0cyclictest65850irq/126-lan10:55:153
30812991616,0cyclictest65850irq/126-lan10:49:563
30812991616,0cyclictest65850irq/126-lan10:00:123
30812991616,0cyclictest65850irq/126-lan09:45:163
30812991616,0cyclictest65850irq/126-lan09:30:123
30812991616,0cyclictest65850irq/126-lan07:23:063
30812991616,0cyclictest65850irq/126-lan07:16:123
30812991615,1cyclictest65850irq/126-lan12:35:153
30812991615,1cyclictest65850irq/126-lan08:00:153
30801991616,0cyclictest743-21snmpd10:00:090
30801991616,0cyclictest743-21snmpd07:19:340
30801991616,0cyclictest3820-21cat11:15:150
30801991616,0cyclictest1789-21cat11:10:140
30812991515,0cyclictest65850irq/126-lan12:15:153
30812991515,0cyclictest65850irq/126-lan11:50:113
30812991515,0cyclictest65850irq/126-lan11:00:163
30812991515,0cyclictest65850irq/126-lan10:20:203
30812991515,0cyclictest65850irq/126-lan10:15:133
30812991515,0cyclictest65850irq/126-lan09:40:173
30812991515,0cyclictest65850irq/126-lan08:45:173
30812991515,0cyclictest65850irq/126-lan08:28:573
30812991515,0cyclictest65850irq/126-lan08:20:183
30812991515,0cyclictest65850irq/126-lan08:05:123
30812991515,0cyclictest65850irq/126-lan07:10:153
30801991515,0cyclictest743-21snmpd11:35:490
30801991515,0cyclictest743-21snmpd10:44:440
30801991515,0cyclictest743-21snmpd10:09:520
30801991515,0cyclictest743-21snmpd09:41:290
30801991515,0cyclictest743-21snmpd09:14:250
30801991515,0cyclictest743-21snmpd08:49:580
30801991514,1cyclictest743-21snmpd09:35:540
30812991414,0cyclictest65850irq/126-lan12:00:213
30812991414,0cyclictest65850irq/126-lan11:25:123
30812991414,0cyclictest65850irq/126-lan10:40:113
30812991414,0cyclictest65850irq/126-lan09:15:183
30812991414,0cyclictest65850irq/126-lan09:10:123
30812991414,0cyclictest65850irq/126-lan09:02:083
30812991414,0cyclictest65850irq/126-lan08:53:423
30812991414,0cyclictest65850irq/126-lan08:40:143
30812991414,0cyclictest65850irq/126-lan07:35:133
30801991414,0cyclictest743-21snmpd12:11:230
30801991414,0cyclictest743-21snmpd11:01:290
30801991414,0cyclictest743-21snmpd09:32:350
30801991414,0cyclictest743-21snmpd09:22:230
30801991414,0cyclictest743-21snmpd08:53:040
30801991414,0cyclictest743-21snmpd08:09:080
30801991414,0cyclictest743-21snmpd07:20:150
30801991414,0cyclictest743-21snmpd07:12:220
30801991414,0cyclictest30978-21cat09:45:140
30812991313,0cyclictest65850irq/126-lan11:30:103
30812991313,0cyclictest65850irq/126-lan10:25:143
30812991313,0cyclictest65850irq/126-lan09:58:413
30812991313,0cyclictest65850irq/126-lan09:50:203
30812991313,0cyclictest65850irq/126-lan08:35:203
30812991313,0cyclictest65850irq/126-lan08:30:113
30812991313,0cyclictest65850irq/126-lan07:55:133
30812991313,0cyclictest65850irq/126-lan07:50:123
30801991313,0cyclictest743-21snmpd12:32:410
30801991313,0cyclictest743-21snmpd12:03:140
30801991313,0cyclictest743-21snmpd11:51:580
30801991313,0cyclictest743-21snmpd11:41:010
30801991313,0cyclictest743-21snmpd11:34:070
30801991313,0cyclictest743-21snmpd10:33:130
30801991313,0cyclictest743-21snmpd09:57:030
30801991313,0cyclictest743-21snmpd09:09:050
30801991313,0cyclictest743-21snmpd08:55:060
30801991313,0cyclictest743-21snmpd08:15:270
30801991313,0cyclictest743-21snmpd07:46:590
30801991313,0cyclictest743-21snmpd07:33:490
30801991313,0cyclictest743-21snmpd07:25:480
30801991313,0cyclictest31062-21cat08:25:150
30801991313,0cyclictest12044-21cat07:40:120
30812991212,0cyclictest65850irq/126-lan12:05:143
30812991212,0cyclictest65850irq/126-lan09:39:563
30801991212,0cyclictest743-21snmpd12:35:590
30812991111,0cyclictest65850irq/126-lan12:10:153
30812991111,0cyclictest65850irq/126-lan11:44:013
30812991111,0cyclictest65850irq/126-lan11:35:113
30812991111,0cyclictest65850irq/126-lan10:37:553
30812991111,0cyclictest65850irq/126-lan10:32:553
30812991111,0cyclictest65850irq/126-lan08:55:233
3081299109,1cyclictest65850irq/126-lan11:10:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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