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2025-12-08 - 03:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Dec 08, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6229998233,8cyclictest0-21swapper/218:44:152
622999804,27cyclictest0-21swapper/219:12:282
622999773,38cyclictest0-21swapper/223:49:282
622999773,21cyclictest29940-21latency_hist00:04:022
6227997620,49cyclictest9110-21cpuspeed_turbos21:04:261
622599736,60cyclictest0-21swapper/019:09:280
622599684,56cyclictest0-21swapper/021:29:080
622599674,55cyclictest0-21swapper/022:39:070
622599653,56cyclictest0-21swapper/019:34:420
623099645,53cyclictest0-21swapper/322:44:373
623099644,54cyclictest0-21swapper/323:04:313
623099642,26cyclictest0-21swapper/321:44:193
622999644,48cyclictest0-21swapper/220:04:412
229272643,12sleep30-21swapper/319:19:143
6227996311,33cyclictest0-21swapper/123:44:041
6227996311,33cyclictest0-21swapper/123:44:041
622599635,51cyclictest0-21swapper/020:55:490
622599634,52cyclictest0-21swapper/023:39:040
622599634,52cyclictest0-21swapper/023:39:040
622599634,52cyclictest0-21swapper/021:59:210
622599626,49cyclictest0-21swapper/019:30:280
622599624,49cyclictest0-21swapper/018:49:280
622599624,27cyclictest0-21swapper/022:14:200
68542610,4sleep1201ktimersoftd/123:14:221
623099614,51cyclictest0-21swapper/322:19:083
622799613,52cyclictest1727-21sendmail_mailqu19:39:441
622599614,51cyclictest23937-21gltestperf21:34:300
622599613,52cyclictest0-21swapper/021:19:280
245892613,9sleep124716-21unixbench_multi23:49:381
622799604,8cyclictest32455-21yum-updatesd-he19:39:131
6227996036,10cyclictest1369-21runrttasks22:54:061
622599604,27cyclictest0-21swapper/023:24:410
622599603,50cyclictest0-21swapper/022:29:280
6227995936,10cyclictest23126-21telnet21:34:211
622599593,50cyclictest0-21swapper/022:19:280
622599593,49cyclictest0-21swapper/021:54:330
622599593,49cyclictest0-21swapper/020:39:150
622599593,49cyclictest0-21swapper/019:14:290
263312593,49sleep00-21swapper/019:24:360
623099585,44cyclictest1369-21runrttasks22:54:183
623099584,29cyclictest0-21swapper/322:29:383
622599585,26cyclictest0-21swapper/022:09:190
622599584,47cyclictest0-21swapper/023:39:210
622599584,47cyclictest0-21swapper/023:39:210
622599583,49cyclictest0-21swapper/019:44:270
622599583,49cyclictest0-21swapper/018:54:270
622599583,49cyclictest0-21swapper/018:54:270
622599583,49cyclictest0-21swapper/018:44:420
622599583,48cyclictest0-21swapper/023:23:010
125832583,9sleep112647-21switchtime21:09:411
623099574,30cyclictest0-21swapper/320:04:123
6230995739,12cyclictest11885-21head23:24:253
6230995720,14cyclictest0-21swapper/320:59:383
6230995720,14cyclictest0-21swapper/320:59:383
623099572,9cyclictest0-21swapper/322:29:073
623099572,9cyclictest0-21swapper/322:29:073
622599574,47cyclictest0-21swapper/021:19:110
622599573,48cyclictest0-21swapper/023:14:300
622599573,48cyclictest0-21swapper/023:07:370
622599573,48cyclictest0-21swapper/020:19:240
622599573,48cyclictest0-21swapper/020:19:240
622599572,48cyclictest0-21swapper/022:44:370
281652573,46sleep00-21swapper/020:34:450
623099565,42cyclictest0-21swapper/320:24:353
622799563,47cyclictest0-21swapper/123:34:391
622799563,47cyclictest0-21swapper/123:34:391
622599563,47cyclictest0-21swapper/022:24:310
622599563,47cyclictest0-21swapper/022:24:310
622599563,47cyclictest0-21swapper/021:04:400
622599563,46cyclictest0-21swapper/019:49:320
623099555,28cyclictest0-21swapper/319:25:343
623099554,27cyclictest0-21swapper/321:39:033
623099553,45cyclictest7729-21munin-node18:44:513
623099553,44cyclictest0-21swapper/320:44:253
622999553,46cyclictest0-21swapper/221:04:472
6227995540,8cyclictest19215-21awk22:34:061
6227995535,8cyclictest19292-21munin-run20:19:111
6227995535,13cyclictest0-21swapper/119:24:141
622599554,44cyclictest0-21swapper/023:54:160
622599553,46cyclictest0-21swapper/023:59:220
622599553,46cyclictest0-21swapper/023:49:390
622599553,46cyclictest0-21swapper/023:44:260
622599553,46cyclictest0-21swapper/022:59:180
622599553,46cyclictest0-21swapper/022:59:180
622599553,46cyclictest0-21swapper/021:49:490
622599553,46cyclictest0-21swapper/021:09:210
622599553,46cyclictest0-21swapper/020:14:440
622599553,45cyclictest0-21swapper/020:24:310
622599552,47cyclictest0-21swapper/021:29:330
622599552,47cyclictest0-21swapper/000:09:220
263652553,45sleep00-21swapper/020:33:160
216982556,42sleep20-21swapper/223:44:272
623099544,44cyclictest0-21swapper/319:08:173
6230995437,10cyclictest482-21tr21:54:233
623099543,8cyclictest19967-21unixbench_singl23:39:373
623099543,8cyclictest19967-21unixbench_singl23:39:373
6230995421,15cyclictest0-21swapper/322:11:023
6227995441,7cyclictest0-21swapper/120:39:121
6227995436,12cyclictest0-21swapper/120:04:321
622599544,28cyclictest0-21swapper/020:00:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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