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2026-04-05 - 15:09

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 Sun Apr 05, 2026 12:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17234993939,0cyclictest28163-21fwupd07:35:113
17227991818,0cyclictest65850irq/126-lan11:03:141
17227991818,0cyclictest65850irq/126-lan08:24:341
17227991818,0cyclictest65850irq/126-lan07:53:271
17227991818,0cyclictest3263-21cat10:30:151
17227991817,1cyclictest65850irq/126-lan12:30:181
17227991817,1cyclictest65850irq/126-lan11:51:331
17227991817,1cyclictest65850irq/126-lan10:00:131
17227991817,1cyclictest65850irq/126-lan09:59:191
17227991817,1cyclictest65850irq/126-lan09:59:181
17227991717,0cyclictest65850irq/126-lan11:25:151
17227991717,0cyclictest65850irq/126-lan11:20:121
17227991717,0cyclictest65850irq/126-lan11:18:191
17227991717,0cyclictest65850irq/126-lan11:13:421
17227991717,0cyclictest65850irq/126-lan10:40:011
17227991717,0cyclictest65850irq/126-lan10:15:131
17227991717,0cyclictest65850irq/126-lan10:05:201
17227991717,0cyclictest65850irq/126-lan09:02:191
17227991717,0cyclictest65850irq/126-lan08:06:501
17227991716,1cyclictest65850irq/126-lan09:55:011
17227991716,1cyclictest65850irq/126-lan09:55:011
17227991716,1cyclictest65850irq/126-lan07:45:121
17227991616,0cyclictest743-21snmpd10:28:281
17227991616,0cyclictest743-21snmpd07:43:241
17227991616,0cyclictest743-21snmpd07:15:211
17227991616,0cyclictest65850irq/126-lan11:55:001
17227991616,0cyclictest65850irq/126-lan11:30:151
17227991616,0cyclictest65850irq/126-lan10:49:051
17227991616,0cyclictest65850irq/126-lan09:41:081
17227991616,0cyclictest65850irq/126-lan09:25:121
17227991616,0cyclictest65850irq/126-lan08:50:131
17227991616,0cyclictest65850irq/126-lan08:10:221
17227991616,0cyclictest65850irq/126-lan08:00:181
17227991616,0cyclictest65850irq/126-lan07:20:141
17227991615,1cyclictest65850irq/126-lan12:20:121
17227991615,1cyclictest65850irq/126-lan12:15:121
17227991515,0cyclictest743-21snmpd09:09:101
17227991515,0cyclictest65850irq/126-lan11:49:361
17227991515,0cyclictest65850irq/126-lan11:42:191
17227991515,0cyclictest65850irq/126-lan10:50:171
17227991515,0cyclictest65850irq/126-lan10:20:141
17227991515,0cyclictest65850irq/126-lan09:20:201
17227991515,0cyclictest65850irq/126-lan09:15:181
17227991515,0cyclictest65850irq/126-lan09:13:451
17227991515,0cyclictest65850irq/126-lan07:10:141
17227991514,1cyclictest65850irq/126-lan12:35:171
17227991514,1cyclictest65850irq/126-lan08:25:111
17227991514,1cyclictest65850irq/126-lan08:15:151
17227991414,0cyclictest743-21snmpd12:12:351
17227991414,0cyclictest743-21snmpd09:35:201
17227991414,0cyclictest65850irq/126-lan12:25:171
17227991414,0cyclictest65850irq/126-lan11:39:191
17227991414,0cyclictest65850irq/126-lan10:55:111
17227991414,0cyclictest65850irq/126-lan10:42:551
17227991414,0cyclictest65850irq/126-lan09:46:181
17227991414,0cyclictest65850irq/126-lan08:45:181
17227991414,0cyclictest65850irq/126-lan07:25:201
17227991413,1cyclictest65850irq/126-lan08:40:101
17227991413,1cyclictest65850irq/126-lan07:30:171
17227991313,0cyclictest65850irq/126-lan07:55:211
17227991313,0cyclictest65850irq/126-lan07:36:451
17227991312,1cyclictest65850irq/126-lan08:35:151
17227991211,1cyclictest65850irq/126-lan11:05:131
17227991211,1cyclictest65850irq/126-lan09:30:171
1721999128,3cyclictest743-21snmpd10:43:280
17227991111,0cyclictest65850irq/126-lan08:56:181
1721999118,3cyclictest743-21snmpd12:17:110
1721999118,3cyclictest743-21snmpd08:19:260
1721999118,3cyclictest743-21snmpd07:41:080
1721999115,6cyclictest743-21snmpd11:01:410
1721999110,4cyclictest0-21swapper/008:58:580
17227991010,0cyclictest65850irq/126-lan10:14:221
17227991010,0cyclictest65850irq/126-lan08:30:171
1721999107,3cyclictest743-21snmpd10:50:230
1721999107,3cyclictest743-21snmpd09:22:190
1721999107,3cyclictest741-21lldpd07:22:080
1721999107,3cyclictest741-21lldpd07:14:070
172349998,1cyclictest743-21snmpd10:49:143
172349998,1cyclictest743-21snmpd08:48:063
172349998,1cyclictest743-21snmpd08:15:323
172349998,1cyclictest741-21lldpd12:28:183
172349998,1cyclictest741-21lldpd09:14:183
172349998,1cyclictest741-21lldpd08:30:383
172319998,1cyclictest743-21snmpd10:57:472
172319998,1cyclictest743-21snmpd08:50:452
172319998,1cyclictest743-21snmpd08:43:142
172199998,1cyclictest743-21snmpd11:50:580
172199998,1cyclictest743-21snmpd11:40:120
172199998,1cyclictest743-21snmpd09:47:490
172199998,1cyclictest741-21lldpd10:47:560
172199997,2cyclictest743-21snmpd07:28:240
172199997,2cyclictest506-21systemd-resolve09:34:330
172199995,4cyclictest743-21snmpd09:28:380
172199992,3cyclictest557-21NetworkManager12:25:170
172199992,3cyclictest557-21NetworkManager08:39:230
172199992,3cyclictest2033-21grep07:50:140
172349988,0cyclictest743-21snmpd12:33:443
172349988,0cyclictest743-21snmpd09:36:173
172349988,0cyclictest741-21lldpd11:30:493
172349988,0cyclictest741-21lldpd11:05:543
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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