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2026-08-27 - 20:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Thu Aug 27, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2337421220,3chrt0-21swapper/210:59:132
2337421220,3chrt0-21swapper/210:59:132
673921080,2chrt6743-21timerandwakeup11:39:230
673921080,2chrt6743-21timerandwakeup11:39:230
2418021080,2sleep30-21swapper/309:34:153
2418021080,2sleep30-21swapper/309:34:153
2245121040,2sleep022454-21grep10:54:240
2245121040,2sleep022454-21grep10:54:240
267652940,3sleep30-21swapper/308:14:163
267652940,3sleep30-21swapper/308:14:163
109772870,3sleep010553-21/usr/sbin/munin08:59:150
109772870,3sleep010553-21/usr/sbin/munin08:59:150
155882790,3chrt0-21swapper/009:09:240
61902740,3sleep00-21swapper/008:44:240
61902740,3sleep00-21swapper/008:44:240
149032740,3sleep20-21swapper/210:34:282
149032740,3sleep20-21swapper/210:34:282
311982670,3sleep20-21swapper/209:54:122
51592550,3chrt0-21swapper/208:44:142
51592550,3chrt0-21swapper/208:44:142
49512550,2sleep30-21swapper/310:09:173
49512550,2sleep30-21swapper/310:09:173
306122550,3sleep20-21swapper/208:24:212
290922480,3sleep10-21swapper/109:49:021
290922480,3sleep10-21swapper/109:49:021
5992470,3sleep20-21swapper/209:59:112
5992470,3sleep20-21swapper/209:59:112
5992470,3sleep20-21swapper/209:59:112
281112470,3sleep028107-21grep11:09:240
281112470,3sleep028107-21grep11:09:240
403099461,9cyclictest29577-21taskset12:41:171
403099461,9cyclictest29577-21taskset12:41:171
11852460,3sleep00-21swapper/008:34:110
403099451,7cyclictest3891-21seq10:05:441
403099451,7cyclictest3891-21seq10:05:441
403099441,7cyclictest22236-21seq12:22:561
403099441,7cyclictest22236-21seq12:22:561
403099441,7cyclictest22236-21seq12:22:561
403099441,6cyclictest22728-21runrttasks10:56:491
403099441,6cyclictest22728-21runrttasks10:56:491
403099441,6cyclictest10885-21seq11:51:201
403099441,6cyclictest10885-21seq11:51:201
403099440,3cyclictest700-21192.168.115.40-manager08:29:301
403099440,3cyclictest700-21192.168.115.40-manager08:29:301
403099440,2cyclictest700-21192.168.115.40-manager09:39:581
403099440,2cyclictest700-21192.168.115.40-manager09:39:581
403099431,4cyclictest19024-21taskset10:47:051
403099431,4cyclictest19024-21taskset10:47:051
403099431,3cyclictest0-21swapper/112:11:371
403099431,3cyclictest0-21swapper/112:11:371
403099431,3cyclictest0-21swapper/111:42:211
403099431,3cyclictest0-21swapper/111:42:211
403099430,4cyclictest700-21192.168.115.40-manager12:01:051
403099430,4cyclictest700-21192.168.115.40-manager12:01:051
403099430,3cyclictest700-21192.168.115.40-manager08:35:451
403099430,2cyclictest700-21192.168.115.40-manager11:20:061
403099430,2cyclictest700-21192.168.115.40-manager11:20:061
403099430,2cyclictest700-21192.168.115.40-manager08:54:571
403099421,9cyclictest4453-21taskset08:41:171
403099421,9cyclictest4453-21taskset08:41:171
403099421,3cyclictest0-21swapper/112:27:381
403099421,3cyclictest0-21swapper/111:31:261
403099421,3cyclictest0-21swapper/111:31:261
403099421,3cyclictest0-21swapper/111:03:041
403099421,3cyclictest0-21swapper/111:03:041
403099421,3cyclictest0-21swapper/110:51:011
403099421,3cyclictest0-21swapper/110:51:011
403099421,3cyclictest0-21swapper/110:22:291
403099421,3cyclictest0-21swapper/110:22:291
403099421,3cyclictest0-21swapper/109:06:021
403099421,3cyclictest0-21swapper/108:46:011
403099421,3cyclictest0-21swapper/108:46:011
403099421,3cyclictest0-21swapper/108:27:311
403099421,3cyclictest0-21swapper/107:56:441
403099421,3cyclictest0-21swapper/107:51:221
403099421,3cyclictest0-21swapper/107:51:221
403099421,2cyclictest0-21swapper/109:53:331
403099421,2cyclictest0-21swapper/109:00:461
403099421,2cyclictest0-21swapper/109:00:461
403099420,2cyclictest700-21192.168.115.40-manager09:27:071
403099420,2cyclictest700-21192.168.115.40-manager09:27:071
403099411,3cyclictest0-21swapper/112:32:101
403099411,3cyclictest0-21swapper/111:37:211
403099411,3cyclictest0-21swapper/111:37:211
403099411,3cyclictest0-21swapper/111:07:351
403099411,3cyclictest0-21swapper/111:07:351
403099411,3cyclictest0-21swapper/110:31:491
403099411,3cyclictest0-21swapper/110:26:481
403099411,3cyclictest0-21swapper/109:55:581
403099411,3cyclictest0-21swapper/108:53:311
403099411,3cyclictest0-21swapper/108:53:311
403099411,3cyclictest0-21swapper/108:19:301
403099411,3cyclictest0-21swapper/108:19:301
403099411,3cyclictest0-21swapper/107:42:171
403099411,3cyclictest0-21swapper/107:42:171
403099411,2cyclictest0-21swapper/110:43:041
403099411,2cyclictest0-21swapper/110:43:041
403099411,2cyclictest0-21swapper/108:19:001
403099411,2cyclictest0-21swapper/108:19:001
403099401,8cyclictest749-21runrttasks11:09:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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