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2026-04-08 - 03:27

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 08, 2026 00:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14777992424,0cyclictest20265-21fwupd00:34:410
14791991918,1cyclictest65850irq/126-lan23:11:443
14791991918,1cyclictest65850irq/126-lan19:25:213
14791991917,2cyclictest65850irq/126-lan19:25:003
14791991817,1cyclictest65850irq/126-lan22:45:133
14782991818,0cyclictest743-21snmpd23:23:201
14782991818,0cyclictest743-21snmpd23:06:311
14782991818,0cyclictest743-21snmpd21:55:151
14782991818,0cyclictest743-21snmpd20:30:251
14782991818,0cyclictest743-21snmpd20:26:041
14782991818,0cyclictest743-21snmpd19:55:301
14782991818,0cyclictest18594-21cat20:35:131
14782991818,0cyclictest10877-21cat21:35:141
14791991717,0cyclictest65850irq/126-lan20:40:133
14791991716,1cyclictest65850irq/126-lan23:45:143
14791991716,1cyclictest65850irq/126-lan23:35:013
14791991716,1cyclictest65850irq/126-lan23:30:193
14791991716,1cyclictest65850irq/126-lan20:46:273
14791991716,1cyclictest65850irq/126-lan20:15:143
14791991716,1cyclictest65850irq/126-lan00:10:103
14782991717,0cyclictest743-21snmpd23:44:071
14782991717,0cyclictest743-21snmpd22:17:071
14782991717,0cyclictest743-21snmpd22:05:341
14782991717,0cyclictest743-21snmpd20:43:171
14782991717,0cyclictest743-21snmpd00:30:541
14782991717,0cyclictest29142-21cat21:00:131
14782991717,0cyclictest19444-21cat19:20:141
14791991616,0cyclictest65850irq/126-lan22:40:173
14791991616,0cyclictest65850irq/126-lan22:20:123
14791991616,0cyclictest65850irq/126-lan22:10:143
14791991616,0cyclictest65850irq/126-lan21:35:133
14791991616,0cyclictest65850irq/126-lan21:10:153
14791991616,0cyclictest65850irq/126-lan00:35:143
14791991616,0cyclictest65850irq/126-lan00:00:203
14791991615,1cyclictest65850irq/126-lan23:40:003
14791991615,1cyclictest65850irq/126-lan23:15:013
14791991615,1cyclictest65850irq/126-lan22:25:143
14791991615,1cyclictest65850irq/126-lan20:20:183
14791991615,1cyclictest65850irq/126-lan19:55:183
14791991515,0cyclictest65850irq/126-lan23:05:133
14791991515,0cyclictest65850irq/126-lan22:35:113
14791991515,0cyclictest65850irq/126-lan21:50:153
14791991515,0cyclictest65850irq/126-lan20:35:173
14791991515,0cyclictest65850irq/126-lan19:35:133
14791991515,0cyclictest65850irq/126-lan00:23:253
14791991514,1cyclictest65850irq/126-lan20:05:163
14791991514,1cyclictest65850irq/126-lan19:45:133
14791991514,1cyclictest65850irq/126-lan19:15:113
14791991514,1cyclictest65850irq/126-lan19:10:213
14791991514,1cyclictest65850irq/126-lan00:30:003
14791991513,2cyclictest65850irq/126-lan21:20:153
14791991414,0cyclictest65850irq/126-lan21:40:203
14791991414,0cyclictest65850irq/126-lan21:30:063
14791991414,0cyclictest65850irq/126-lan21:00:133
14791991414,0cyclictest65850irq/126-lan20:25:123
14791991414,0cyclictest65850irq/126-lan19:40:203
14791991414,0cyclictest65850irq/126-lan19:34:543
14791991414,0cyclictest65850irq/126-lan00:15:203
14791991413,1cyclictest65850irq/126-lan23:00:133
14791991413,1cyclictest65850irq/126-lan22:00:173
14791991413,1cyclictest65850irq/126-lan21:48:293
14791991413,1cyclictest65850irq/126-lan20:30:173
14791991412,2cyclictest65850irq/126-lan23:25:133
14791991412,2cyclictest65850irq/126-lan22:20:003
14791991412,2cyclictest65850irq/126-lan21:55:153
14791991313,0cyclictest65850irq/126-lan22:53:163
14791991312,1cyclictest65850irq/126-lan23:50:193
14791991312,1cyclictest65850irq/126-lan23:20:113
14791991312,1cyclictest65850irq/126-lan22:05:133
14791991312,1cyclictest65850irq/126-lan00:35:003
14791991312,1cyclictest65850irq/126-lan00:05:163
14782991313,0cyclictest743-21snmpd20:15:031
14791991212,0cyclictest65850irq/126-lan21:25:133
14791991211,1cyclictest65850irq/126-lan21:15:173
14791991211,1cyclictest65850irq/126-lan19:50:143
14791991110,1cyclictest65850irq/126-lan23:56:503
1479199109,1cyclictest65850irq/126-lan20:00:173
14791991010,0cyclictest65850irq/126-lan21:06:423
14791991010,0cyclictest65850irq/126-lan20:55:223
147919998,1cyclictest65850irq/126-lan22:55:113
147919998,1cyclictest65850irq/126-lan22:30:163
147869998,1cyclictest743-21snmpd22:49:032
147869998,1cyclictest743-21snmpd20:51:402
147869998,1cyclictest743-21snmpd19:54:502
147869998,1cyclictest741-21lldpd23:11:102
147779998,1cyclictest743-21snmpd23:30:130
147779998,1cyclictest743-21snmpd19:46:470
147919988,0cyclictest65850irq/126-lan20:10:123
147869988,0cyclictest743-21snmpd22:10:252
147869988,0cyclictest743-21snmpd20:31:492
147869988,0cyclictest743-21snmpd20:19:212
147869988,0cyclictest741-21lldpd20:06:282
147869987,1cyclictest743-21snmpd22:50:112
147869987,1cyclictest743-21snmpd22:06:102
147869987,1cyclictest27952-21fschecks_count23:35:142
147869986,2cyclictest743-21snmpd23:26:012
147869986,2cyclictest743-21snmpd23:23:082
147869986,2cyclictest743-21snmpd21:16:112
147869986,2cyclictest743-21snmpd19:30:252
147869986,2cyclictest743-21snmpd00:26:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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