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2026-03-18 - 12:35

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 highest latencies:
System rack9slot4s (updated Wed Mar 18, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
271709911861149,25cyclictest0-21swapper/019:26:200
271719911451136,6cyclictest0-21swapper/119:26:451
268732491447,29sleep00-21swapper/019:22:280
268162461365,32sleep10-21swapper/119:21:531
31892960,8sleep00-21swapper/021:10:120
160212640,23sleep116020-21ssh00:10:211
323022460,7sleep12717199cyclictest19:35:181
184942461,33sleep118561-21cut20:25:161
297202450,16sleep041ktimersoftd/020:55:120
27171994515,4cyclictest81rcu_preempt21:45:081
49252441,25sleep04940-21irqstats23:25:200
251202440,7sleep12717199cyclictest20:40:301
181732440,7sleep12717199cyclictest21:25:181
27171994314,4cyclictest81rcu_preempt23:15:121
27171994221,6cyclictest22-21ksoftirqd/122:55:191
27170994210,16cyclictest2206-21dbus-daemon19:39:160
27171994122,4cyclictest22-21ksoftirqd/123:24:311
312162401,35sleep131227-21ssh22:12:011
27171994013,4cyclictest81rcu_preempt00:05:111
2717099408,14cyclictest2206-21dbus-daemon20:40:440
2717199391,4cyclictest81rcu_preempt20:50:181
245142390,8sleep10-21swapper/123:11:541
147032391,4sleep014714-21ssh23:01:400
88542381,34sleep08864-21ssh22:22:260
2717199386,4cyclictest81rcu_preempt00:30:311
2717099384,17cyclictest5678-21/usr/sbin/munin00:00:330
2717199373,5cyclictest0-21swapper/100:39:351
27171993719,5cyclictest22-21ksoftirqd/122:55:011
27170993727,6cyclictest0-21swapper/000:10:360
2717099371,4cyclictest81rcu_preempt00:52:400
27170993711,7cyclictest2206-21dbus-daemon20:00:130
2717199369,4cyclictest81rcu_preempt21:42:551
2717199366,4cyclictest81rcu_preempt22:49:561
2717199361,6cyclictest25121-21sort22:05:301
27170993629,4cyclictest0-21swapper/021:39:550
27170993627,5cyclictest0-21swapper/022:35:160
2717099361,5cyclictest11296-21fschecks_count22:25:160
27170993612,4cyclictest0-21swapper/019:45:100
207572361,5sleep120784-21munin-run00:50:001
273772351,30sleep027395-21ssh23:49:010
2717199355,4cyclictest81rcu_preempt00:26:531
27171993526,4cyclictest22-21ksoftirqd/122:00:181
2717199352,29cyclictest0-21swapper/122:23:351
2717199351,6cyclictest2309-21cron21:25:001
2717199351,30cyclictest18856-21ssh22:32:551
2717099358,15cyclictest0-21swapper/023:23:380
27170993526,6cyclictest5824-21ssh22:20:000
2717099351,5cyclictest5386-21cron00:00:000
224292351,5sleep122443-21ssh23:43:501
208712351,5sleep120892-21ssh22:35:141
17842351,4sleep11866-21python23:55:271
118152350,4sleep1211ktimersoftd/121:19:121
114842351,30sleep02562-21diskmemload22:59:030
2717199345,5cyclictest81rcu_preempt23:52:251
27171993424,5cyclictest22-21ksoftirqd/100:50:221
2717199342,29cyclictest0-21swapper/100:42:161
2717199341,14cyclictest0-21swapper/123:39:191
2717099343,4cyclictest81rcu_preempt21:31:150
2717099342,4cyclictest0-21swapper/022:53:550
2717099342,20cyclictest1835-21ssh22:49:130
2717099342,19cyclictest13344-21irqstats21:20:200
2717099341,5cyclictest2562-21diskmemload23:34:550
2717099341,31cyclictest0-21swapper/021:55:160
2717099341,29cyclictest2403-21irqbalance22:03:160
2717099341,21cyclictest32228-21runrttasks00:26:530
27170993410,4cyclictest81rcu_preempt23:35:310
265222341,29sleep026533-21ssh22:07:130
18582341,4sleep02018-21/usr/sbin/munin21:05:300
139312341,3sleep013945-21ssh00:41:140
58182331,3sleep00-21swapper/000:33:290
2717199336,4cyclictest81rcu_preempt21:10:551
27171993328,3cyclictest138250irq/90-eth023:45:291
2717199332,4cyclictest81rcu_preempt21:30:171
2717199331,4cyclictest4577-21ssh22:18:161
27171993313,6cyclictest5678-21/usr/sbin/munin00:00:111
2717199331,30cyclictest0-21swapper/120:47:361
2717199331,13cyclictest0-21swapper/123:00:251
2717099339,12cyclictest2562-21diskmemload21:50:160
2717099339,11cyclictest3302-21runrttasks20:27:170
2717099334,5cyclictest81rcu_preempt00:05:160
27170993326,4cyclictest0-21swapper/000:49:150
2717099331,4cyclictest21088-21ssh21:28:350
83442321,5sleep00-21swapper/019:57:130
2717199324,4cyclictest81rcu_preempt00:20:571
2717199323,6cyclictest0-21swapper/120:22:361
2717199323,6cyclictest0-21swapper/120:22:351
2717199322,16cyclictest21834-21/usr/sbin/munin23:10:001
2717199321,8cyclictest21807-21awk20:35:001
27171993213,4cyclictest81rcu_preempt19:30:251
2717199321,17cyclictest15991-21ssh21:55:591
2717099328,12cyclictest8449-21ssh00:35:300
2717099328,12cyclictest32336-21diskstats21:40:140
2717099323,5cyclictest81rcu_preempt23:44:090
2717099323,4cyclictest81rcu_preempt21:48:430
2717099323,16cyclictest0-21swapper/020:14:030
27170993225,5cyclictest0-21swapper/019:40:560
27170993224,4cyclictest3302-21runrttasks22:10:180
27170993222,7cyclictest0-21swapper/023:53:150
27170993222,6cyclictest20055-21ssh22:34:400
2717099322,20cyclictest0-21swapper/023:05:100
2717099322,17cyclictest0-21swapper/023:10:110
2717099321,9cyclictest81rcu_preempt00:18:070
2717099321,29cyclictest0-21swapper/020:47:560
90682311,26sleep19125-21aten_r4power_en23:30:111
62352311,4sleep06290-21users19:50:300
277932311,4sleep130497-21gdbus22:41:511
2717199311,4cyclictest81rcu_preempt21:35:141
2717199311,27cyclictest0-21swapper/119:56:151
27171993112,4cyclictest81rcu_preempt00:15:161
27171993111,6cyclictest22-21ksoftirqd/122:28:221
2717099316,12cyclictest32282-21processes21:00:270
27170993124,5cyclictest0-21swapper/019:32:160
2717099311,27cyclictest0-21swapper/023:17:150
2717099311,15cyclictest25332-21ssh00:20:150
2717099311,14cyclictest8536-21load21:15:200
282002301,5sleep00-21swapper/022:42:250
2717199305,4cyclictest81rcu_preempt21:50:161
27171993016,4cyclictest81rcu_preempt20:05:211
27171993016,12cyclictest22-21ksoftirqd/120:55:261
2717099301,4cyclictest81rcu_preempt20:30:120
235042301,5sleep00-21swapper/020:38:250
2717199299,4cyclictest81rcu_preempt20:15:281
27171992919,7cyclictest22-21ksoftirqd/121:00:151
2717199291,4cyclictest81rcu_preempt23:25:281
2717199291,25cyclictest0-21swapper/120:38:361
2717199291,18cyclictest0-21swapper/120:00:141
2717099297,6cyclictest0-21swapper/020:21:230
2717099297,6cyclictest0-21swapper/020:21:230
2717099294,12cyclictest11063-21fschecks_count20:05:150
2717099293,13cyclictest27895-21diskstats20:50:140
28192281,5sleep10-21swapper/119:43:341
2717199288,7cyclictest22-21ksoftirqd/119:45:111
2717199284,17cyclictest13237-21memory20:10:221
27171992819,6cyclictest1186-21tune2fs21:05:161
2717099281,8cyclictest14925-21hddtemp_smartct20:15:170
27171992619,4cyclictest5376-21fschecks_count19:50:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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