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2026-04-29 - 10:34

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 Wed Apr 29, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2392199984,12cyclictest0-21swapper/221:00:472
2392199984,12cyclictest0-21swapper/220:41:392
2392199964,65cyclictest0-21swapper/221:46:332
23921999421,49cyclictest0-21swapper/217:21:542
2392199934,68cyclictest0-21swapper/221:10:152
2392199934,13cyclictest0-21swapper/220:34:522
2392199934,10cyclictest25894-21aten_r1power_en20:01:342
2392199934,10cyclictest25894-21aten_r1power_en20:01:342
2392199924,64cyclictest0-21swapper/219:28:272
2392199924,11cyclictest0-21swapper/221:17:182
2392199919,7cyclictest0-21swapper/219:06:582
2392199914,64cyclictest0-21swapper/220:53:052
2392199914,13cyclictest0-21swapper/218:08:172
2392199913,12cyclictest0-21swapper/220:24:142
2392199913,10cyclictest0-21swapper/220:49:292
2392199913,10cyclictest0-21swapper/220:49:292
23921999120,47cyclictest0-21swapper/219:17:512
23921999120,47cyclictest0-21swapper/219:17:512
23921999117,56cyclictest20787-21ssh19:51:562
23921999115,57cyclictest0-21swapper/222:21:472
23921999112,55cyclictest0-21swapper/220:16:352
2392199907,7cyclictest16762-21diskmemload19:21:412
2392199907,7cyclictest16762-21diskmemload19:21:412
2392199906,12cyclictest0-21swapper/222:10:042
2392199906,12cyclictest0-21swapper/222:10:042
2392199905,14cyclictest0-21swapper/221:36:442
2392199904,62cyclictest0-21swapper/221:56:202
2392199904,12cyclictest0-21swapper/220:27:162
2392199903,12cyclictest0-21swapper/217:07:012
23921999017,53cyclictest24948-21ssh19:11:462
2392199895,60cyclictest0-21swapper/221:01:262
2392199895,10cyclictest1419-21runrttasks21:51:302
2392199894,63cyclictest0-21swapper/219:44:562
2392199894,63cyclictest0-21swapper/219:03:412
2392199894,12cyclictest0-21swapper/220:14:222
285042880,3sleep041ktimersoftd/020:04:470
285042880,3sleep041ktimersoftd/020:04:470
2392199885,62cyclictest0-21swapper/222:12:342
2392199884,9cyclictest16396-21missed_timers21:21:452
2392199884,69cyclictest0-21swapper/220:39:382
2392199884,68cyclictest0-21swapper/221:11:552
2392199884,66cyclictest27571-21gltestperf22:26:372
2392199884,64cyclictest0-21swapper/219:31:362
2392199884,60cyclictest0-21swapper/218:51:502
2392199884,59cyclictest0-21swapper/217:36:502
2392199884,13cyclictest0-21swapper/220:11:182
2392099882,78cyclictest44791sshd21:05:131
2392199874,9cyclictest16024-21ssh19:46:382
2392199874,58cyclictest0-21swapper/219:56:322
2392199874,12cyclictest0-21swapper/221:41:462
2392199873,12cyclictest11247-21ps22:01:472
2392199873,10cyclictest22210-21taskset22:18:132
2392199873,10cyclictest10464-21ps19:36:532
2392099874,76cyclictest0-21swapper/119:46:551
2392099873,75cyclictest0-21swapper/120:43:551
2392199864,12cyclictest0-21swapper/221:32:022
2392099864,74cyclictest25388-21python20:46:531
2392099864,74cyclictest25388-21python20:46:531
2392099863,65cyclictest0-21swapper/121:33:131
2392199855,56cyclictest0-21swapper/218:56:392
2392199854,65cyclictest0-21swapper/218:33:212
2392199854,57cyclictest0-21swapper/217:01:432
2392199853,13cyclictest0-21swapper/217:56:402
2392199853,13cyclictest0-21swapper/217:56:402
2392199853,10cyclictest20617-21runrttasks18:01:392
2392199853,10cyclictest18584-21basename21:26:312
2392199853,10cyclictest18584-21basename21:26:312
2392099854,72cyclictest0-21swapper/120:13:541
2392099843,75cyclictest2896-21fschecks_count19:26:421
2392099843,73cyclictest6473-21munin-node21:56:331
2392199834,54cyclictest0-21swapper/217:41:402
2392199834,13cyclictest0-21swapper/218:11:452
2392199833,62cyclictest8219-21systemd-cgroups17:35:022
2392199833,10cyclictest1676-21nscd17:31:292
2392099834,72cyclictest0-21swapper/121:16:401
2392099834,61cyclictest0-21swapper/122:20:571
2392099833,74cyclictest0-21swapper/120:41:161
2392099833,74cyclictest0-21swapper/118:19:351
2392099833,73cyclictest28236-21fschecks_time19:16:441
2392099833,73cyclictest28236-21fschecks_time19:16:441
2392099833,73cyclictest10033-21fgrep17:36:571
2392099833,73cyclictest0-21swapper/122:15:311
2392099833,47cyclictest0-21swapper/121:23:141
2392199824,61cyclictest15574-21munin-run17:51:282
2392199824,56cyclictest0-21swapper/218:41:372
2392199824,56cyclictest0-21swapper/218:41:372
2392199824,11cyclictest0-21swapper/218:26:412
2392199823,13cyclictest11564-21grep18:47:022
2392099824,70cyclictest0-21swapper/119:54:061
2392099823,72cyclictest7138-21runrttasks21:07:381
2392099823,70cyclictest26778-21cut22:26:291
2392099823,60cyclictest8350-21ntp_kernel_pll_20:21:511
2392199814,12cyclictest0-21swapper/217:01:312
2392099814,70cyclictest0-21swapper/117:06:481
2392099814,69cyclictest0-21swapper/121:37:341
2392099814,69cyclictest0-21swapper/119:21:401
2392099814,69cyclictest0-21swapper/119:21:401
2392099814,61cyclictest0-21swapper/120:56:211
2392099814,61cyclictest0-21swapper/120:09:341
2392099813,71cyclictest0-21swapper/119:33:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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