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2026-08-24 - 08:43

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 100 highest latencies:
System rack9slot4s (updated Mon Aug 24, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22719912701231,35cyclictest2507-21taskset19:25:121
22709910981069,26cyclictest0-21swapper/019:25:130
20492662615,32sleep10-21swapper/119:23:151
21782518434,33sleep00-21swapper/019:24:380
227199721,7cyclictest2721-21aten_r4power_cu20:50:121
227199702,6cyclictest25926-21users00:40:291
227199651,40cyclictest15600-21/usr/sbin/munin22:50:091
227199621,7cyclictest3286-21runrttasks20:58:571
227199621,5cyclictest11607-21grep00:05:131
2271996213,36cyclictest18510-21runrttasks00:21:271
227199614,53cyclictest20668-21iostat_ios20:10:181
2271996111,33cyclictest19819-21awk00:25:261
227199609,34cyclictest11420-21taskset22:37:271
227199609,33cyclictest16039-21awk00:15:241
227199603,37cyclictest26861-21df00:45:141
227199601,40cyclictest4330-21/usr/sbin/munin22:20:211
227199596,8cyclictest21103-21latency_hist23:05:011
227199595,35cyclictest0-21swapper/123:45:271
227199593,7cyclictest23050-21df00:35:141
227199591,7cyclictest12246-21tune2fs22:40:171
227199591,11cyclictest6356-21hwlatdetect23:50:181
227199588,33cyclictest29693-21sed00:50:281
227199588,31cyclictest10893-21seq00:00:381
227199581,8cyclictest14761-21switchtime22:45:291
227199581,7cyclictest21643-21strings00:30:231
227199581,7cyclictest21636-21cut21:40:101
227199581,40cyclictest24360-21hwlatdetect20:20:171
227199581,37cyclictest26615-21chrt23:18:581
2271995810,35cyclictest23518-21runrttasks20:18:321
227199577,32cyclictest32548-21taskset22:08:081
227199574,5cyclictest19767-21aten_r4power_en21:35:111
227199574,46cyclictest13969-21iostat_ios00:10:221
227199574,46cyclictest13969-21iostat_ios00:10:221
227199572,9cyclictest16916-21iostat20:00:191
227199572,43cyclictest0-21swapper/121:56:201
227199571,7cyclictest438-21aten_r4power_cu22:10:111
227199571,6cyclictest2752-21strings23:40:201
227199571,5cyclictest25666-21/usr/sbin/munin21:50:171
227199571,43cyclictest1540-21sshd23:37:311
227199571,39cyclictest2336-21/usr/sbin/munin22:15:211
2271995710,29cyclictest2178-21seq20:46:321
2271995710,29cyclictest2178-21seq20:46:321
228392560,9sleep0227099cyclictest00:35:120
227199569,33cyclictest0-21swapper/122:25:111
227199567,4cyclictest12590-21hostname19:50:111
227199563,7cyclictest12684-21hddtemp_smartct21:15:181
227199563,47cyclictest30031-21users23:25:281
227199563,46cyclictest8678-21iostat_ios22:30:191
227199562,6cyclictest14721-21df_inode19:55:161
227199561,7cyclictest8755-21latency_hist19:40:011
227199561,6cyclictest22175-21runrttasks23:05:261
227199561,5cyclictest16473-21/usr/sbin/munin21:25:181
2271995611,28cyclictest23494-21/usr/sbin/munin21:45:211
24502550,6sleep02448-21tr22:15:110
227199552,6cyclictest30539-21taskset22:01:481
227199552,38cyclictest0-21swapper/123:20:261
227199551,7cyclictest4947-21munin-node19:30:061
227199551,6cyclictest31174-21wc23:30:201
227199551,6cyclictest24612-21sshd23:12:411
227199551,6cyclictest10021-21taskset21:08:441
227199551,5cyclictest18949-21strings20:05:231
227199551,36cyclictest10762-21aten_r4power_vo19:45:121
278892541,33sleep027894-21/usr/sbin/munin20:30:150
227199542,6cyclictest6844-21df_inode21:00:121
227199541,6cyclictest8956-21grep19:40:131
227199541,6cyclictest18003-21grep21:30:131
227199532,6cyclictest11129-21awk21:10:231
227199531,6cyclictest28087-21hddtemp_smartct20:30:161
227199531,6cyclictest14106-21runrttasks21:20:121
227199531,5cyclictest27065-21chrt20:26:101
227199531,33cyclictest17481-21/usr/sbin/munin22:55:311
227199522,7cyclictest3286-21runrttasks20:44:311
227199511,6cyclictest8527-21ntpq23:55:241
227199502,6cyclictest29765-21diskstats20:35:141
35792460,8sleep00-21swapper/020:50:240
2270993711,13cyclictest11426-21needreboot19:45:230
227099364,16cyclictest21331-21users20:10:290
227099362,21cyclictest19212-21python20:05:270
2743123518,4sleep03-21ksoftirqd/020:30:010
289502341,4sleep028961-21idleruntime-cro22:00:000
227099341,13cyclictest23486-21runrttasks21:45:050
263842331,5sleep00-21swapper/023:16:370
227099339,11cyclictest0-21swapper/000:05:130
227099336,5cyclictest81rcu_preempt00:25:290
36792321,5sleep00-21swapper/023:43:490
227099327,12cyclictest26385-21cron00:45:000
2270993223,6cyclictest3-21ksoftirqd/019:55:320
2270993213,6cyclictest32195-21ntp_states20:40:240
2270993213,15cyclictest12837-21df19:50:140
2270993210,6cyclictest2225-21dbus-daemon23:24:330
17662321,5sleep00-21swapper/022:11:030
2270993122,6cyclictest8565-21perl22:30:150
227099312,16cyclictest25071-21grep20:20:290
227099311,4cyclictest81rcu_preempt00:51:050
2270993110,9cyclictest0-21swapper/021:10:410
225722311,5sleep00-21swapper/023:06:000
138802311,6sleep013928-21/usr/sbin/munin00:10:200
138802311,6sleep013928-21/usr/sbin/munin00:10:200
134252311,5sleep00-21swapper/022:43:350
76472301,5sleep00-21swapper/022:27:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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