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2026-04-21 - 12:10

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 Tue Apr 21, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211162722480,5sleep21-21systemd19:10:012
215922521540,3sleep13056-21PK-Backend21:20:001
220625721100,4sleep2341ksoftirqd/223:30:212
211050528743,35sleep10-21swapper/119:05:191
139099830,72rtkit-daemon0-21swapper/019:09:020
22058422640,3sleep10-21swapper/123:30:161
211133826241,14sleep30-21swapper/319:07:273
21379042520,7sleep126-21ksoftirqd/120:20:141
21679562410,3sleep30-21swapper/321:45:003
21449512310,4sleep20-21swapper/220:40:112
2111738992421,2cyclictest13-21ksoftirqd/021:04:570
22279852230,2sleep13056-21PK-Backend00:35:001
2111750992310,9cyclictest978-21snmpd00:15:103
2111745992315,6cyclictest2213396-21users23:50:232
2111738992321,1cyclictest0-21swapper/021:09:230
2111738992320,2cyclictest3056-21PK-Backend20:35:300
2111750992215,5cyclictest2117819-21idleruntime-cro19:24:593
2111750992215,4cyclictest82332-21update-manager23:22:203
2111750992215,4cyclictest82332-21update-manager23:22:193
2111750992215,4cyclictest2173647-21apt22:00:113
2111750992213,7cyclictest2165584-21python321:35:203
211175099220,19cyclictest2180585-21perf22:20:003
2111745992220,1cyclictest0-21swapper/200:06:052
2111745992214,6cyclictest2131494-21awk20:00:192
211174599220,21cyclictest0-21swapper/221:37:222
211174599220,20cyclictest0-21swapper/200:00:452
2111738992220,1cyclictest0-21swapper/023:22:260
2111738992220,1cyclictest0-21swapper/023:22:260
2111738992220,1cyclictest0-21swapper/022:25:210
2111738992220,1cyclictest0-21swapper/020:44:020
2111738992220,1cyclictest0-21swapper/020:26:110
2111738992220,1cyclictest0-21swapper/019:47:100
2111738992219,2cyclictest0-21swapper/022:24:210
211173899220,21cyclictest0-21swapper/023:55:320
139099220,3rtkit-daemon1389-21rtkit-daemon22:50:041
21415382210,4sleep03056-21PK-Backend20:30:160
21415382210,4sleep03056-21PK-Backend20:30:150
2111750992115,4cyclictest2126741-21grep19:50:003
2111750992113,6cyclictest2184048-21apt-get22:30:003
2111750992112,7cyclictest2121293-21apt-get19:35:013
211175099210,19cyclictest3056-21PK-Backend00:00:353
2111745992119,1cyclictest0-21swapper/223:35:032
2111745992119,1cyclictest0-21swapper/223:15:562
2111745992119,1cyclictest0-21swapper/222:37:442
2111745992119,1cyclictest0-21swapper/222:12:362
2111745992119,1cyclictest0-21swapper/222:07:222
2111745992119,1cyclictest0-21swapper/221:56:072
2111745992119,1cyclictest0-21swapper/221:45:252
2111745992119,1cyclictest0-21swapper/221:15:242
2111745992119,1cyclictest0-21swapper/221:11:462
2111745992119,1cyclictest0-21swapper/221:05:322
2111745992119,1cyclictest0-21swapper/220:59:152
2111745992119,1cyclictest0-21swapper/219:55:412
2111745992119,1cyclictest0-21swapper/219:35:472
2111745992113,6cyclictest2152924-21python321:00:202
211174599210,20cyclictest978-21snmpd23:45:442
211174599210,20cyclictest0-21swapper/222:53:122
211174599210,20cyclictest0-21swapper/222:19:532
211174599210,20cyclictest0-21swapper/220:54:012
211174599210,20cyclictest0-21swapper/219:16:352
211174599210,20cyclictest0-21swapper/219:16:352
211174599210,20cyclictest0-21swapper/200:15:322
211174599210,19cyclictest0-21swapper/223:25:102
2111739992119,1cyclictest3056-21PK-Backend21:23:471
2111739992119,1cyclictest0-21swapper/123:27:441
2111739992119,1cyclictest0-21swapper/122:03:351
2111739992119,1cyclictest0-21swapper/121:41:521
2111739992119,1cyclictest0-21swapper/120:01:211
2111739992118,2cyclictest3056-21PK-Backend22:37:561
2111739992117,2cyclictest3056-21PK-Backend00:20:301
211173999210,19cyclictest3056-21PK-Backend22:56:141
211173999210,19cyclictest3056-21PK-Backend20:39:541
211173999210,19cyclictest3056-21PK-Backend19:29:231
211173999210,19cyclictest3056-21PK-Backend00:17:121
2111738992119,1cyclictest0-21swapper/023:42:470
2111738992119,1cyclictest0-21swapper/022:30:010
2111738992119,1cyclictest0-21swapper/022:13:110
2111738992119,1cyclictest0-21swapper/021:27:550
2111738992119,1cyclictest0-21swapper/021:11:120
2111738992119,1cyclictest0-21swapper/020:11:510
2111738992119,1cyclictest0-21swapper/020:02:110
2111738992119,1cyclictest0-21swapper/019:41:020
2111738992119,1cyclictest0-21swapper/019:37:580
2111738992116,3cyclictest2179248-21tr22:15:120
211173899210,20cyclictest0-21swapper/020:45:030
211173899210,20cyclictest0-21swapper/019:24:530
211173899210,20cyclictest0-21swapper/019:15:540
211173899210,20cyclictest0-21swapper/019:15:540
139099210,18rtkit-daemon884-21gmain19:47:331
2111750992018,1cyclictest3056-21PK-Backend21:49:143
2111750992018,1cyclictest0-21swapper/323:50:073
2111750992018,1cyclictest0-21swapper/323:42:443
2111750992018,1cyclictest0-21swapper/322:37:413
2111750992018,1cyclictest0-21swapper/321:18:533
2111750992018,1cyclictest0-21swapper/319:43:423
2111750992018,1cyclictest0-21swapper/300:28:063
2111750992018,1cyclictest0-21swapper/300:24:493
2111750992018,1cyclictest0-21swapper/300:11:033
2111750992015,3cyclictest2141174-21apt-config20:30:003
2111750992015,3cyclictest2130715-21/usr/sbin/munin20:00:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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