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2026-07-31 - 17:49

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 Fri Jul 31, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
158919910011,81cyclictest0-21swapper/010:30:270
1589199994,61cyclictest0-21swapper/008:28:220
15891999319,46cyclictest7227-21grep08:05:330
15891999312,61cyclictest29644-21tune2fs08:40:300
1589199924,8cyclictest13703-21ssh08:15:460
1589199914,8cyclictest26934-21ntp_states08:35:420
1589199906,8cyclictest265271rm10:15:090
1589199904,13cyclictest0-21swapper/010:05:210
1589199903,64cyclictest3350-21cpu08:50:250
15891999013,58cyclictest0-21swapper/010:43:270
1589199895,59cyclictest0-21swapper/006:10:350
1589199894,65cyclictest0-21swapper/009:05:460
1589199894,12cyclictest0-21swapper/009:50:220
1589199894,12cyclictest0-21swapper/007:00:160
1589199894,11cyclictest0-21swapper/009:45:320
1589199893,8cyclictest18789-21ssh10:50:340
1589199893,67cyclictest0-21swapper/011:14:190
1589199893,67cyclictest0-21swapper/008:47:350
1589199893,10cyclictest3810-21aten_r1power_en09:40:220
1589199886,10cyclictest0-21swapper/011:07:060
1589199884,12cyclictest0-21swapper/009:15:230
1589199884,12cyclictest0-21swapper/009:15:230
1589199874,66cyclictest0-21swapper/008:33:520
1589199874,63cyclictest0-21swapper/007:05:520
1589199874,12cyclictest0-21swapper/010:45:200
1589199874,12cyclictest0-21swapper/008:21:020
1589199874,11cyclictest0-21swapper/011:25:540
1589199874,11cyclictest0-21swapper/009:10:370
1589199874,11cyclictest0-21swapper/006:15:380
1589199873,8cyclictest8629-21diskmemload10:00:250
1589199873,66cyclictest0-21swapper/011:33:570
1589199873,65cyclictest0-21swapper/010:22:150
1589199873,13cyclictest0-21swapper/009:55:250
1589199873,13cyclictest0-21swapper/009:55:250
1589199873,12cyclictest0-21swapper/006:25:350
1589199873,12cyclictest0-21swapper/006:25:350
15891998714,55cyclictest0-21swapper/010:55:440
15891998711,58cyclictest0-21swapper/007:50:310
15891998711,58cyclictest0-21swapper/007:50:310
1589199865,11cyclictest0-21swapper/009:25:330
1589199864,12cyclictest0-21swapper/010:36:370
1589199864,12cyclictest0-21swapper/006:50:490
1589199864,10cyclictest0-21swapper/011:00:470
1589199863,64cyclictest8069-21cat08:55:450
1589199863,13cyclictest0-21swapper/009:24:290
1589199863,11cyclictest29831-21grep09:30:240
1589199863,10cyclictest0-21swapper/011:15:330
1589199863,10cyclictest0-21swapper/011:15:330
15891998612,55cyclictest1858-21http_loadtime10:25:290
1589199854,61cyclictest0-21swapper/007:00:310
1589199854,12cyclictest0-21swapper/011:35:360
1589199854,12cyclictest0-21swapper/011:20:350
1589199854,12cyclictest0-21swapper/006:30:500
1589199854,11cyclictest0-21swapper/007:10:430
1589199854,11cyclictest0-21swapper/007:10:430
1589199853,59cyclictest0-21swapper/010:15:440
15891998516,52cyclictest0-21swapper/009:36:410
1589199844,12cyclictest0-21swapper/009:00:380
1589199843,62cyclictest0-21swapper/006:35:300
1589199843,12cyclictest0-21swapper/008:12:200
15891998417,49cyclictest0-21swapper/007:45:280
1589199834,60cyclictest0-21swapper/007:35:330
1589199824,12cyclictest0-21swapper/007:32:290
1589199824,12cyclictest0-21swapper/007:20:170
15891998219,46cyclictest0-21swapper/007:58:530
1589199814,12cyclictest0-21swapper/006:25:190
1589199804,60cyclictest0-21swapper/008:00:280
1589199804,57cyclictest0-21swapper/007:20:380
1589199804,57cyclictest0-21swapper/006:40:420
1589199794,12cyclictest0-21swapper/006:45:370
1589199784,13cyclictest0-21swapper/007:42:570
1589199764,65cyclictest0-21swapper/007:25:350
1589199714,10cyclictest15861-21crond06:10:180
2840126520,36sleep328414-21kernelversion11:05:313
15893996524,22cyclictest12287-21open_inodes10:40:411
15894996436,11cyclictest0-21swapper/208:54:492
219499630,6rtkit-daemon29469-21diskstats08:40:281
15895996332,25cyclictest4529-21fschecks_time09:40:293
1589599623,21cyclictest0-21swapper/310:05:553
219499610,7rtkit-daemon8136-21latency09:45:331
219499600,7rtkit-daemon0-21swapper/009:08:571
1589499605,48cyclictest0-21swapper/211:30:212
1589499605,47cyclictest0-21swapper/207:00:162
219499590,7rtkit-daemon0-21swapper/009:44:551
219499590,5rtkit-daemon5723-21ssh08:53:281
15895995932,13cyclictest0-21swapper/308:58:173
127292594,47sleep20-21swapper/208:15:312
219499580,5rtkit-daemon8629-21diskmemload08:55:201
219499580,4rtkit-daemon27894-21ssh08:37:281
1589499584,47cyclictest0-21swapper/209:15:302
1589499584,47cyclictest0-21swapper/209:15:302
1589399585,26cyclictest0-21swapper/108:45:451
58112574,12sleep20-21swapper/209:41:252
219499570,6rtkit-daemon1124-21snmpd09:22:111
219499570,6rtkit-daemon0-21swapper/009:19:261
219499570,6rtkit-daemon0-21swapper/009:19:261
219499570,5rtkit-daemon2193-21rtkit-daemon10:05:103
15895995731,13cyclictest0-21swapper/309:51:333
1589499574,46cyclictest0-21swapper/209:39:252
15894995719,31cyclictest281ktimersoftd/211:00:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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