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2026-04-20 - 20:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rack0slot3s.osadl.org (updated Mon Apr 20, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28671772266241,16sleep50-21swapper/519:09:335
28668232264215,16sleep70-21swapper/719:05:347
28668822262215,16sleep20-21swapper/219:06:182
28668672261220,32sleep30-21swapper/319:06:113
28668352260214,16sleep10-21swapper/119:05:441
28671452258216,32sleep60-21swapper/619:09:106
28668252257217,32sleep00-21swapper/019:05:350
28670562246222,16sleep40-21swapper/419:08:044
303448121090,0sleep00-21swapper/000:10:210
28942072990,0sleep00-21swapper/019:55:180
29380912540,0sleep20-21swapper/221:15:172
2867536994033,5cyclictest2888679-21iostat_ios19:45:167
2867518993326,6cyclictest1391-21snmpd23:25:233
2867531993028,1cyclictest0-21swapper/621:55:166
2867527993023,5cyclictest523-21systemd-journal21:15:155
2867527992821,5cyclictest523-21systemd-journal19:24:195
2867522992819,5cyclictest571rcuc/420:25:154
2867509992825,2cyclictest2743-21gnome-shell21:15:581
2867518992721,2cyclictest1391-21snmpd19:50:223
286750999270,23cyclictest0-21swapper/121:21:431
2867536992622,3cyclictest0-21swapper/721:17:217
286753699260,25cyclictest0-21swapper/700:17:107
2867531992622,3cyclictest1391-21snmpd23:41:026
2867531992622,3cyclictest1391-21snmpd23:04:016
2867531992621,4cyclictest1391-21snmpd21:00:096
2867522992622,3cyclictest1391-21snmpd22:38:154
286752299260,22cyclictest0-21swapper/420:16:234
286752299260,22cyclictest0-21swapper/420:16:234
2867518992621,2cyclictest1391-21snmpd23:13:053
2867518992621,2cyclictest1391-21snmpd20:37:043
2867518992621,1cyclictest1391-21snmpd21:10:303
2867518992619,3cyclictest1391-21snmpd20:30:043
286751899260,26cyclictest0-21swapper/321:33:593
286751399260,22cyclictest0-21swapper/221:30:252
2867509992620,6cyclictest1391-21snmpd23:45:081
286750499260,24cyclictest0-21swapper/022:16:180
286750499260,22cyclictest0-21swapper/022:25:560
2867536992521,3cyclictest2907869-21cat20:20:177
2867536992521,3cyclictest2907869-21cat20:20:177
2867536992518,5cyclictest0-21swapper/723:51:507
2867536992518,3cyclictest0-21swapper/723:23:447
2867527992522,2cyclictest2921556-21cat20:45:165
2867527992520,3cyclictest3040646-21updatedb00:22:145
286752799250,3cyclictest2945864-21df21:30:125
286752799250,1cyclictest0-21swapper/522:11:275
2867518992521,3cyclictest1391-21snmpd22:25:483
2867518992521,3cyclictest1391-21snmpd22:14:443
2867518992521,1cyclictest1391-21snmpd00:38:343
2867518992520,4cyclictest1391-21snmpd23:39:053
2867513992521,3cyclictest2899621-21awk20:05:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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