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2026-05-28 - 10:03

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 Thu May 28, 2026 00:43:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12020993838,0cyclictest26131-21fwupd23:37:503
12014991919,0cyclictest65850irq/126-lan23:44:172
12014991918,1cyclictest65850irq/126-lan23:05:112
12014991918,1cyclictest65850irq/126-lan20:05:122
12014991818,0cyclictest743-21snmpd22:53:252
12014991818,0cyclictest743-21snmpd19:45:162
12014991818,0cyclictest743-21snmpd19:18:132
12014991818,0cyclictest743-21snmpd00:35:082
12014991818,0cyclictest65850irq/126-lan23:15:152
12014991818,0cyclictest65850irq/126-lan20:20:152
12014991817,1cyclictest65850irq/126-lan20:40:162
12014991817,1cyclictest65850irq/126-lan00:15:122
12014991717,0cyclictest743-21snmpd22:11:152
12014991717,0cyclictest65850irq/126-lan23:10:172
12014991717,0cyclictest65850irq/126-lan22:20:122
12014991717,0cyclictest65850irq/126-lan22:17:322
12014991717,0cyclictest65850irq/126-lan22:00:132
12014991717,0cyclictest65850irq/126-lan21:50:162
12014991717,0cyclictest65850irq/126-lan21:35:182
12014991717,0cyclictest65850irq/126-lan20:49:312
12014991717,0cyclictest65850irq/126-lan19:29:322
12014991717,0cyclictest65850irq/126-lan00:29:402
12014991717,0cyclictest24988-21cat23:35:142
12014991716,1cyclictest65850irq/126-lan23:50:132
12014991716,1cyclictest65850irq/126-lan23:20:152
12014991716,1cyclictest65850irq/126-lan21:00:122
12014991716,1cyclictest65850irq/126-lan19:30:212
12014991716,1cyclictest65850irq/126-lan00:01:102
12014991616,0cyclictest65850irq/126-lan23:47:202
12014991616,0cyclictest65850irq/126-lan21:30:112
12014991616,0cyclictest65850irq/126-lan20:30:182
12014991616,0cyclictest65850irq/126-lan20:15:182
12014991616,0cyclictest65850irq/126-lan19:54:592
12014991616,0cyclictest65850irq/126-lan19:20:102
12014991616,0cyclictest65850irq/126-lan00:30:162
12014991616,0cyclictest65850irq/126-lan00:20:122
12014991615,1cyclictest65850irq/126-lan21:15:152
12014991615,1cyclictest65850irq/126-lan20:35:172
12014991615,1cyclictest65850irq/126-lan19:40:172
12014991615,1cyclictest65850irq/126-lan19:10:122
12014991515,0cyclictest65850irq/126-lan23:55:142
12014991515,0cyclictest65850irq/126-lan22:45:452
12014991515,0cyclictest65850irq/126-lan22:30:202
12014991515,0cyclictest65850irq/126-lan21:45:132
12014991515,0cyclictest65850irq/126-lan20:50:152
12014991515,0cyclictest65850irq/126-lan20:25:092
12014991514,1cyclictest65850irq/126-lan19:55:102
12014991414,0cyclictest65850irq/126-lan23:25:182
12014991414,0cyclictest65850irq/126-lan21:55:152
12014991414,0cyclictest65850irq/126-lan20:11:542
12014991414,0cyclictest65850irq/126-lan19:38:412
12014991414,0cyclictest65850irq/126-lan00:07:232
12014991413,1cyclictest65850irq/126-lan21:20:162
12020991312,1cyclictest717-21ntpd23:00:383
12014991313,0cyclictest65850irq/126-lan23:02:122
12014991313,0cyclictest65850irq/126-lan22:43:142
12014991313,0cyclictest65850irq/126-lan22:38:042
12014991313,0cyclictest65850irq/126-lan21:40:142
12014991313,0cyclictest65850irq/126-lan20:55:122
12014991312,1cyclictest65850irq/126-lan21:07:152
12014991212,0cyclictest65850irq/126-lan23:30:382
12014991212,0cyclictest65850irq/126-lan22:25:002
12014991212,0cyclictest65850irq/126-lan22:05:182
12014991212,0cyclictest65850irq/126-lan21:10:322
12014991211,1cyclictest65850irq/126-lan00:10:142
12014991111,0cyclictest65850irq/126-lan22:55:182
12014991111,0cyclictest65850irq/126-lan21:25:132
120209998,1cyclictest743-21snmpd23:07:503
120209998,1cyclictest743-21snmpd22:32:523
120209998,1cyclictest743-21snmpd21:25:293
120209998,1cyclictest743-21snmpd20:27:213
120209998,1cyclictest743-21snmpd00:15:433
120209998,1cyclictest743-21snmpd00:05:463
120209996,3cyclictest24099-21grep22:15:133
120099998,1cyclictest743-21snmpd21:45:531
120049998,1cyclictest743-21snmpd22:57:440
120049998,1cyclictest743-21snmpd22:20:060
120049998,1cyclictest743-21snmpd21:00:340
120049998,1cyclictest743-21snmpd20:48:220
120049998,1cyclictest741-21lldpd21:56:490
120209988,0cyclictest741-21lldpd23:58:303
120209988,0cyclictest741-21lldpd23:34:203
120209988,0cyclictest741-21lldpd21:57:283
120209988,0cyclictest741-21lldpd21:01:463
120209988,0cyclictest741-21lldpd20:12:393
120209988,0cyclictest741-21lldpd19:18:023
120209988,0cyclictest741-21lldpd00:13:303
120209987,1cyclictest743-21snmpd23:27:273
120209987,1cyclictest743-21snmpd22:36:343
120209987,1cyclictest743-21snmpd19:43:323
120209986,2cyclictest743-21snmpd22:03:393
120209986,2cyclictest743-21snmpd21:39:023
120209986,2cyclictest743-21snmpd19:24:133
120209986,2cyclictest743-21snmpd19:11:393
120209986,2cyclictest743-21snmpd00:34:263
120209986,2cyclictest717-21ntpd23:50:033
120209986,2cyclictest717-21ntpd00:26:413
120209985,2cyclictest23400-21head20:55:133
120149988,0cyclictest743-21snmpd20:00:162
120099988,0cyclictest743-21snmpd22:20:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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