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2025-08-21 - 21:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 50 highest latencies:
System rack9slot4s (updated Thu Aug 21, 2025 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23109912121202,7cyclictest0-21swapper/107:25:101
23099911391129,7cyclictest0-21swapper/007:25:070
230999655636,14cyclictest111rcuc/007:35:010
18782484440,29sleep00-21swapper/007:21:150
19392479436,28sleep10-21swapper/107:21:551
200812900,7sleep0230999cyclictest12:40:210
231099781,42cyclictest31686-21iostat_ios11:45:211
307802760,3sleep030781-21cat11:10:280
231099761,43cyclictest24426-21taskset11:04:571
231099731,5cyclictest9489-21ssh11:22:111
231099731,5cyclictest28315-21ssh11:41:291
231099728,31cyclictest32220-21seq10:39:221
231099711,6cyclictest23476-21chrt09:55:431
231099711,5cyclictest28117-21chrt09:27:311
231099711,5cyclictest10518-21diskmemload10:00:301
231099701,6cyclictest16379-21chrt07:59:121
231099701,6cyclictest16379-21chrt07:59:111
231099701,5cyclictest10379-21ssh10:15:391
231099692,6cyclictest13729-21seq09:12:401
231099692,6cyclictest13729-21seq09:12:391
231099692,38cyclictest0-21swapper/110:24:201
231099691,7cyclictest8914-21chrt07:39:551
231099681,7cyclictest8132-21iostat_ios09:40:231
231099672,5cyclictest26816-21taskset12:47:241
231099672,5cyclictest26816-21taskset12:47:231
231099672,35cyclictest30092-21df_inode08:35:141
231099662,4cyclictest0-21swapper/112:04:081
231099659,42cyclictest21027-21taskset12:40:461
231099651,41cyclictest26547-21hddtemp_smartct08:25:191
231099651,41cyclictest2646-21ssh10:41:261
2310996414,30cyclictest15602-21ssh09:48:151
231099641,42cyclictest28588-21ssh12:15:261
231099641,35cyclictest2376-21NetworkManager07:32:411
231099632,45cyclictest18815-21df_inode10:25:141
231099632,40cyclictest0-21swapper/110:51:471
231099631,8cyclictest2163-21sh10:07:521
231099631,45cyclictest20497-21ssh09:20:131
231099623,51cyclictest16311-21iostat_ios09:15:211
231099621,37cyclictest16484-21ssh10:55:321
231099621,37cyclictest16484-21ssh10:55:321
231099615,38cyclictest0-21swapper/111:27:191
231099613,5cyclictest40950irq/93-i91510:47:501
231099611,44cyclictest1017-21/usr/sbin/munin12:20:291
231099611,31cyclictest9113-21/usr/sbin/munin07:40:231
231099604,38cyclictest0-21swapper/110:14:241
231099601,8cyclictest13048-21ssh12:33:121
231099601,5cyclictest10518-21diskmemload09:50:501
231099599,32cyclictest18708-21ssh12:39:261
231099598,33cyclictest12483-21ssh11:59:281
231099593,44cyclictest0-21swapper/111:13:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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