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2026-03-29 - 22:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 100 highest latencies:
System rackcslot7s.osadl.org (updated Sun Mar 29, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
197195521340,2sleep00-21swapper/009:00:000
193266527641,29sleep10-21swapper/107:08:231
193247827540,30sleep00-21swapper/007:05:570
20088972670,2sleep22000093-21kworker/u8:110:45:012
193208226744,15sleep30-21swapper/307:05:233
193257826345,13sleep20-21swapper/207:07:152
139099540,4rtkit-daemon1389-21rtkit-daemon08:16:272
20220512430,4sleep00-21swapper/011:20:190
20396272360,3sleep10-21swapper/112:10:171
19831692350,1sleep11983174-21grep09:30:171
20259292340,1sleep00-21swapper/011:31:340
20259292340,1sleep00-21swapper/011:31:330
139099340,4rtkit-daemon884-21gmain08:04:322
19989572330,4sleep13056-21PK-Backend10:15:111
139099320,4rtkit-daemon1934841-21munin-node09:11:332
139099310,2rtkit-daemon3056-21PK-Backend10:34:012
139099290,4rtkit-daemon1389-21rtkit-daemon11:10:393
139099290,4rtkit-daemon1389-21rtkit-daemon09:22:493
19493922280,5chrt0-21swapper/307:55:123
1932935992813,12cyclictest2012322-21cron10:55:001
139099270,4rtkit-daemon1389-21rtkit-daemon11:24:113
139099260,4rtkit-daemon1389-21rtkit-daemon11:02:063
139099260,4rtkit-daemon1389-21rtkit-daemon08:08:033
19706612250,4chrt0-21swapper/108:55:131
1932935992514,8cyclictest436-20systemd-journal07:35:001
139099250,4rtkit-daemon1389-21rtkit-daemon10:40:543
139099250,21rtkit-daemon1788620-21WebKitWebProces08:30:143
1932943992413,8cyclictest883-21dbus-daemon12:40:003
193294399241,20cyclictest436-20systemd-journal07:24:353
19852352230,5sleep20-21swapper/209:35:242
19557492230,4sleep13056-21PK-Backend08:10:221
193294399238,13cyclictest20472362chrt12:31:123
193294399232,16cyclictest1095-21runrttasks10:15:113
1932943992311,9cyclictest883-21dbus-daemon10:51:053
1932935992320,2cyclictest3056-21PK-Backend09:42:231
1932935992320,2cyclictest3056-21PK-Backend09:42:231
193293599230,3cyclictest2038142-21ntp_states12:05:191
193293599230,21cyclictest3056-21PK-Backend08:38:351
1932933992315,6cyclictest1-21systemd09:05:000
19603332220,3sleep20-21swapper/208:25:142
1932943992215,4cyclictest1940295-21turbostat.cron07:30:013
1932943992214,5cyclictest82332-21update-manager09:26:033
1932935992220,1cyclictest3056-21PK-Backend07:45:421
1932935992220,1cyclictest3056-21PK-Backend07:45:421
1932935992220,1cyclictest0-21swapper/111:36:331
1932935992219,2cyclictest3056-21PK-Backend08:27:261
193293599220,21cyclictest0-21swapper/109:01:331
1932933992220,1cyclictest0-21swapper/010:57:430
1932933992214,6cyclictest1946194-21df07:45:150
1932933992214,6cyclictest1946194-21df07:45:150
139099220,15rtkit-daemon3056-21PK-Backend12:32:131
193294399219,8cyclictest1095-21runrttasks09:15:113
1932943992118,2cyclictest3056-21PK-Backend10:01:593
1932943992118,2cyclictest3056-21PK-Backend09:04:273
1932943992118,2cyclictest3056-21PK-Backend08:51:513
193294399210,20cyclictest0-21swapper/307:53:243
193294399210,19cyclictest3056-21PK-Backend11:58:343
1932938992118,2cyclictest1992354-21smartctl09:55:192
1932938992115,4cyclictest34-21ksoftirqd/207:36:022
1932938992114,5cyclictest2017519-21cron11:10:012
193293899210,20cyclictest0-21swapper/209:07:132
193293899210,1cyclictest0-21swapper/208:11:432
193293599213,13cyclictest2029348-21taskset11:40:221
1932935992119,1cyclictest3056-21PK-Backend12:24:251
1932935992119,1cyclictest3056-21PK-Backend11:22:471
1932935992119,1cyclictest3056-21PK-Backend10:12:241
1932935992119,1cyclictest3056-21PK-Backend09:35:331
1932935992119,1cyclictest3056-21PK-Backend08:21:581
1932935992119,1cyclictest0-21swapper/108:45:031
1932935992119,1cyclictest0-21swapper/107:35:351
1932935992118,2cyclictest3056-21PK-Backend07:51:431
1932935992114,4cyclictest2005367-21sh10:35:001
1932935992112,6cyclictest436-20systemd-journal09:30:001
1932935992111,7cyclictest2031336-21seq11:45:211
193293599210,20cyclictest3056-21PK-Backend08:32:061
193293599210,20cyclictest3056-21PK-Backend07:55:281
193293599210,20cyclictest0-21swapper/110:00:071
193293599210,19cyclictest3056-21PK-Backend10:41:241
193293599210,19cyclictest3056-21PK-Backend10:21:501
193293599210,19cyclictest3056-21PK-Backend07:12:371
193293399210,20cyclictest0-21swapper/011:12:160
193293399210,20cyclictest0-21swapper/009:46:050
193293399210,20cyclictest0-21swapper/009:44:160
193293399210,20cyclictest0-21swapper/009:44:160
193293399210,20cyclictest0-21swapper/009:32:120
193293399210,20cyclictest0-21swapper/009:28:000
193293399210,20cyclictest0-21swapper/008:06:080
193293399210,1cyclictest0-21swapper/012:29:090
139099210,14rtkit-daemon3056-21PK-Backend12:38:251
139099210,14rtkit-daemon0-21swapper/112:15:311
139099210,14rtkit-daemon0-21swapper/012:06:550
139099210,14rtkit-daemon0-21swapper/011:39:590
20135242200,5chrt3056-21PK-Backend10:55:221
1932943992018,1cyclictest0-21swapper/310:21:073
1932943992015,3cyclictest2002299-21tr10:25:113
1932943992012,6cyclictest436-20systemd-journal10:09:553
193294399201,16cyclictest1956233-21ls08:15:003
1932943992010,8cyclictest1977019-21cron09:15:003
193294399200,1cyclictest3056-21PK-Backend10:37:023
193294399200,1cyclictest3056-21PK-Backend10:37:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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