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2026-04-15 - 09:29

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 Wed Apr 15, 2026 00:43:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11035991918,1cyclictest65850irq/126-lan23:55:151
11035991918,1cyclictest65850irq/126-lan21:40:111
11035991817,1cyclictest65850irq/126-lan23:20:151
11035991817,1cyclictest65850irq/126-lan21:10:131
11035991817,1cyclictest65850irq/126-lan00:20:211
11035991717,0cyclictest65850irq/126-lan22:43:411
11035991717,0cyclictest65850irq/126-lan21:48:111
11035991717,0cyclictest65850irq/126-lan19:35:211
11035991716,1cyclictest65850irq/126-lan21:39:391
11035991716,1cyclictest65850irq/126-lan19:45:121
11035991616,0cyclictest65850irq/126-lan23:30:121
11035991616,0cyclictest65850irq/126-lan22:30:131
11035991616,0cyclictest65850irq/126-lan21:19:111
11035991616,0cyclictest65850irq/126-lan20:20:121
11035991616,0cyclictest65850irq/126-lan20:05:161
11035991616,0cyclictest65850irq/126-lan19:55:161
11035991616,0cyclictest65850irq/126-lan19:50:191
11035991615,1cyclictest65850irq/126-lan23:03:111
11035991615,1cyclictest65850irq/126-lan23:00:001
11035991615,1cyclictest65850irq/126-lan22:35:171
11035991615,1cyclictest65850irq/126-lan00:30:181
11044991515,0cyclictest743-21snmpd23:12:573
11035991515,0cyclictest65850irq/126-lan22:25:141
11035991515,0cyclictest65850irq/126-lan21:25:151
11035991515,0cyclictest65850irq/126-lan20:41:101
11035991515,0cyclictest65850irq/126-lan20:35:161
11035991515,0cyclictest65850irq/126-lan20:00:141
11035991515,0cyclictest65850irq/126-lan19:40:371
11035991515,0cyclictest65850irq/126-lan19:25:361
11035991515,0cyclictest65850irq/126-lan00:35:141
11035991514,1cyclictest65850irq/126-lan22:05:181
11035991414,0cyclictest65850irq/126-lan23:25:101
11035991414,0cyclictest65850irq/126-lan22:45:191
11035991414,0cyclictest65850irq/126-lan22:20:171
11035991414,0cyclictest65850irq/126-lan22:15:221
11035991414,0cyclictest65850irq/126-lan21:00:221
11035991414,0cyclictest65850irq/126-lan20:50:151
11035991414,0cyclictest65850irq/126-lan19:11:091
11035991413,1cyclictest65850irq/126-lan23:05:171
11035991413,1cyclictest65850irq/126-lan22:00:141
11044991313,0cyclictest743-21snmpd23:42:193
11044991313,0cyclictest743-21snmpd22:55:423
11044991313,0cyclictest743-21snmpd20:15:073
11044991312,1cyclictest743-21snmpd23:09:533
11035991313,0cyclictest65850irq/126-lan23:51:361
11035991313,0cyclictest65850irq/126-lan23:43:111
11035991313,0cyclictest65850irq/126-lan23:10:141
11035991313,0cyclictest65850irq/126-lan22:50:201
11035991313,0cyclictest65850irq/126-lan21:55:121
11035991313,0cyclictest65850irq/126-lan20:30:121
11035991313,0cyclictest65850irq/126-lan19:20:101
11035991313,0cyclictest65850irq/126-lan19:15:191
11035991312,1cyclictest65850irq/126-lan22:10:161
11035991312,1cyclictest65850irq/126-lan19:30:161
11035991312,1cyclictest65850irq/126-lan00:25:181
11044991212,0cyclictest743-21snmpd23:32:433
11044991212,0cyclictest743-21snmpd22:10:053
11044991212,0cyclictest743-21snmpd22:05:593
11044991212,0cyclictest743-21snmpd21:52:553
11044991212,0cyclictest743-21snmpd21:28:043
11044991212,0cyclictest743-21snmpd21:07:573
11044991212,0cyclictest743-21snmpd19:45:513
11044991212,0cyclictest743-21snmpd19:32:393
11035991212,0cyclictest65850irq/126-lan21:50:151
11035991212,0cyclictest65850irq/126-lan20:15:121
11035991212,0cyclictest65850irq/126-lan00:15:121
11035991211,1cyclictest65850irq/126-lan20:45:151
11044991111,0cyclictest9532-21cat20:25:153
11044991111,0cyclictest743-21snmpd23:54:443
11044991111,0cyclictest743-21snmpd22:49:483
11044991111,0cyclictest743-21snmpd22:04:233
11044991111,0cyclictest743-21snmpd21:04:563
11044991111,0cyclictest743-21snmpd20:51:053
11044991111,0cyclictest743-21snmpd19:52:283
11044991111,0cyclictest743-21snmpd19:18:573
11044991111,0cyclictest743-21snmpd00:01:353
11044991111,0cyclictest15722-21cat19:20:153
11035991111,0cyclictest743-21snmpd23:49:111
11035991111,0cyclictest743-21snmpd00:12:351
11035991111,0cyclictest65850irq/126-lan00:05:161
11044991010,0cyclictest743-21snmpd23:59:443
11044991010,0cyclictest743-21snmpd23:46:443
11044991010,0cyclictest743-21snmpd22:44:333
11044991010,0cyclictest743-21snmpd22:29:473
11044991010,0cyclictest743-21snmpd21:48:373
11044991010,0cyclictest743-21snmpd20:48:013
11044991010,0cyclictest743-21snmpd19:27:173
11044991010,0cyclictest743-21snmpd00:19:323
11044991010,0cyclictest31836-21cat20:00:143
1103599109,1cyclictest65850irq/126-lan00:05:001
11035991010,0cyclictest65850irq/126-lan23:35:151
11035991010,0cyclictest65850irq/126-lan21:05:151
11035991010,0cyclictest65850irq/126-lan20:55:221
110359999,0cyclictest65850irq/126-lan21:20:191
110359998,1cyclictest741-21lldpd20:29:171
110359998,1cyclictest65850irq/126-lan23:15:191
110319998,1cyclictest741-21lldpd20:49:250
110449988,0cyclictest743-21snmpd23:17:583
110449988,0cyclictest743-21snmpd21:14:393
110449988,0cyclictest741-21lldpd23:35:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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