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2026-08-01 - 05:23

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 Sat Aug 01, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34369912401209,27cyclictest3113-21kworker/0:219:26:540
31102683637,30sleep10-21swapper/119:22:141
32942629581,33sleep00-21swapper/019:24:060
343799175167,5cyclictest0-21swapper/119:26:541
179912790,5sleep0111rcuc/021:25:270
34492401,35sleep13456-21diskstats23:40:141
327512375,27sleep10-21swapper/120:40:161
343699366,9cyclictest0-21swapper/019:51:050
3436993610,13cyclictest32264-21latency_hist20:40:000
201632361,31sleep120261-21cat20:05:301
343699353,7cyclictest81rcu_preempt20:40:440
3437993424,6cyclictest11510-21ntp_states00:00:251
343699341,6cyclictest81rcu_preempt22:50:000
343699341,11cyclictest81rcu_preempt21:34:480
247122341,29sleep124841-21df21:45:131
8812331,9sleep00-21swapper/023:34:020
8812331,9sleep00-21swapper/023:34:010
3437993310,12cyclictest22-21ksoftirqd/119:46:151
266662331,4sleep126673-21iostat_ios23:15:211
173912331,4sleep117399-21cut20:00:111
91112321,4sleep19233-21users19:35:311
343799323,4cyclictest81rcu_preempt20:14:221
343799322,19cyclictest0-21swapper/123:21:591
343699329,11cyclictest26015-21latency_hist23:15:010
343699326,14cyclictest16311-21ntpdc19:55:230
343699325,14cyclictest0-21swapper/021:45:250
343799319,6cyclictest11565-21gdbus19:32:271
343799314,4cyclictest81rcu_preempt22:11:201
343799314,4cyclictest81rcu_preempt21:40:061
343699312,24cyclictest4163-21cat22:15:220
343699312,16cyclictest0-21swapper/022:12:070
3436993112,6cyclictest12345-21irqstats19:45:210
3436993111,3cyclictest0-21swapper/022:56:550
164752311,5sleep00-21swapper/021:20:520
66282301,5sleep00-21swapper/023:48:470
343799305,4cyclictest81rcu_preempt00:29:111
343799302,24cyclictest0-21swapper/100:31:131
343799301,4cyclictest81rcu_preempt23:52:001
343699306,12cyclictest6085-21memory22:20:210
343699303,13cyclictest17673-21df20:00:140
343699302,17cyclictest0-21swapper/021:35:130
343699302,15cyclictest23848-21/usr/sbin/munin00:35:290
343699302,14cyclictest3656-21hddtemp_smartct23:40:170
343699301,4cyclictest81rcu_preempt22:40:400
343699301,4cyclictest81rcu_preempt20:16:050
343699301,13cyclictest28626-21fschecks_count21:55:160
3436993010,6cyclictest14200-21python00:10:230
3436993010,5cyclictest4137-21df20:50:130
325492301,25sleep132555-21ntp_states23:30:251
325492301,25sleep132555-21ntp_states23:30:241
257312301,5sleep10-21swapper/123:13:081
150942301,5sleep111565-21gdbus19:52:311
105082301,5sleep10-21swapper/122:31:201
9912291,5sleep00-21swapper/022:06:290
72312291,5sleep00-21swapper/020:57:510
343799297,4cyclictest81rcu_preempt00:15:561
343799294,4cyclictest81rcu_preempt20:49:571
343799294,4cyclictest81rcu_preempt00:48:551
343799293,4cyclictest81rcu_preempt00:38:571
343799292,6cyclictest0-21swapper/123:06:571
343799290,3cyclictest81rcu_preempt21:24:011
343699295,4cyclictest81rcu_preempt22:29:110
343699295,12cyclictest24232-21taskset21:43:160
343699292,14cyclictest19550-21df20:05:150
343699292,14cyclictest0-21swapper/022:35:570
343699292,13cyclictest6692-21iostat_ios19:30:190
343699292,13cyclictest17694-21python22:50:290
3436992912,5cyclictest11325-21cat00:00:210
343699291,16cyclictest25729-21sed00:40:290
343699291,16cyclictest0-21swapper/000:25:160
343699291,14cyclictest9504-21/usr/sbin/munin21:05:160
322162291,5sleep10-21swapper/120:39:361
233762291,24sleep00-21swapper/023:05:290
150582291,5sleep00-21swapper/000:15:060
148832291,5sleep10-21swapper/100:14:511
143322291,5sleep10-21swapper/122:41:501
102822291,5sleep00-21swapper/023:57:460
82292281,5sleep00-21swapper/023:50:560
343799288,7cyclictest0-21swapper/121:25:531
343799288,16cyclictest2225-21dbus-daemon20:52:151
343799287,5cyclictest89072sshd21:00:331
343799285,4cyclictest81rcu_preempt22:24:531
343799285,4cyclictest81rcu_preempt20:23:291
343799284,4cyclictest81rcu_preempt22:51:531
343799284,4cyclictest81rcu_preempt22:16:371
343799284,20cyclictest12154-21cat22:35:271
343799283,4cyclictest81rcu_preempt21:37:441
343799283,4cyclictest81rcu_preempt00:52:201
343799283,19cyclictest13561-21diskstats21:15:161
343799282,4cyclictest81rcu_preempt20:33:111
343799281,4cyclictest81rcu_preempt22:45:081
343799281,4cyclictest81rcu_preempt21:55:061
343799281,25cyclictest111-21usb-storage20:58:201
343799281,23cyclictest7877-21irqstats22:25:191
343699286,6cyclictest0-21swapper/023:37:030
343699283,12cyclictest0-21swapper/022:30:450
343699282,14cyclictest2401-21NetworkManager00:50:210
343699282,14cyclictest11565-21gdbus23:04:590
343699282,13cyclictest26996-21irqstats00:45:200
343699281,14cyclictest27926-21ls20:25:290
343699281,14cyclictest22040-21cron00:30:590
343699281,11cyclictest0-21swapper/022:04:570
343699281,11cyclictest0-21swapper/022:04:570
343699281,10cyclictest0-21swapper/020:11:200
3436992810,5cyclictest11882-21hddtemp_smartct21:10:180
33302281,5sleep00-21swapper/020:46:200
281902281,5sleep10-21swapper/120:26:451
280402281,5sleep00-21swapper/021:53:540
277592289,8sleep122-21ksoftirqd/121:51:001
274252281,5sleep00-21swapper/023:16:150
258382281,5sleep10-21swapper/100:41:191
24812281,5sleep10-21swapper/123:35:501
218712281,5sleep10-21swapper/123:02:001
115492281,5sleep10-21swapper/119:44:451
112242281,5sleep00-21swapper/019:41:200
63792271,5sleep10-21swapper/123:46:121
343799277,9cyclictest22-21ksoftirqd/120:16:211
343799274,7cyclictest2225-21dbus-daemon22:02:051
343799274,7cyclictest2225-21dbus-daemon22:02:051
343799273,4cyclictest81rcu_preempt23:56:451
343799272,13cyclictest0-21swapper/123:27:021
3437992718,5cyclictest19305-21fschecks_count21:30:161
343699272,12cyclictest25600-21memory20:20:170
343699271,17cyclictest0-21swapper/019:35:190
343699271,13cyclictest17722-21grep00:20:250
343699271,12cyclictest7944-21fschecks_count21:00:160
343699271,12cyclictest30326-21taskset20:34:280
293072271,5sleep00-21swapper/023:21:050
183002271,5sleep10-21swapper/100:21:061
128952271,5sleep10-21swapper/100:08:411
128322271,5sleep10-21swapper/121:12:131
10292271,5sleep10-21swapper/122:06:521
343799265,11cyclictest19095-21idleruntime22:55:191
343699262,12cyclictest13773-21wget21:15:190
343699261,16cyclictest0-21swapper/000:06:380
343699261,13cyclictest11565-21gdbus23:28:490
343799253,4cyclictest81rcu_preempt19:55:091
3437992517,5cyclictest22-21ksoftirqd/121:05:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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