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2025-12-24 - 10:04

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 376 highest latencies:
System rack9slot4s (updated Wed Dec 24, 2025 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
273249911881163,19cyclictest4049-21strings19:45:281
273249911071098,6cyclictest0-21swapper/119:25:131
269762592545,32sleep00-21swapper/019:21:580
258542558512,31sleep10-21swapper/119:20:151
2732399150123,23cyclictest0-21swapper/019:45:280
258172950,5sleep02732399cyclictest22:40:120
21632880,7sleep02732399cyclictest00:29:360
27323998156,22cyclictest0-21swapper/019:25:130
98032780,5sleep09793-21ssh23:30:160
21192690,4sleep02118-21ntpq19:40:220
16352690,5sleep01632-21ssh22:15:170
94322511,31sleep19509-21/usr/sbin/munin23:30:121
85032440,7sleep12732499cyclictest22:55:201
50212430,7sleep02732399cyclictest23:58:460
2732399421,37cyclictest17491-21ssh21:57:560
263302420,6sleep12732499cyclictest21:34:001
2732499414,33cyclictest0-21swapper/122:36:151
283222401,35sleep127224-21/usr/sbin/munin23:15:281
9122390,5sleep081rcu_preempt21:05:060
39412391,4sleep03950-21ntp_states22:50:260
106302391,3sleep110638-21ssh22:24:451
27323993819,6cyclictest3-21ksoftirqd/022:47:010
2732399381,33cyclictest0-21swapper/023:29:560
2732499373,5cyclictest0-21swapper/121:40:151
2732499371,6cyclictest3202-21fschecks_count00:30:161
2732499365,4cyclictest81rcu_preempt21:20:211
2732499362,15cyclictest0-21swapper/121:40:001
27323993620,5cyclictest3-21ksoftirqd/000:32:210
27323993616,9cyclictest3-21ksoftirqd/023:40:180
2732399361,21cyclictest9680-21runrttasks21:15:590
2732499355,4cyclictest81rcu_preempt22:10:291
2732499353,30cyclictest0-21swapper/123:13:361
2732499353,30cyclictest0-21swapper/120:41:561
27323993512,6cyclictest3577-21ssh23:23:570
302942342,28sleep130466-21perl19:30:171
2732499347,4cyclictest81rcu_preempt00:14:031
27324993425,5cyclictest0-21swapper/123:22:551
27324993416,9cyclictest40550irq/92-i91520:15:261
2732499341,5cyclictest25950-21ssh23:46:151
2732399349,7cyclictest2206-21dbus-daemon22:05:270
2732399349,7cyclictest2206-21dbus-daemon22:05:260
2732399346,25cyclictest1968-21lldpad22:38:060
2732399341,29cyclictest30412-21ssh22:10:360
229152341,29sleep022947-21proc_pri20:35:280
133732341,4sleep013419-21iostat21:20:200
2732499334,4cyclictest81rcu_preempt22:50:321
27324993327,3cyclictest0-21swapper/122:04:561
27324993326,4cyclictest0-21swapper/123:35:351
27324993325,6cyclictest0-21swapper/120:36:161
2732499331,30cyclictest0-21swapper/119:58:351
2732499331,30cyclictest0-21swapper/100:46:161
2732399338,12cyclictest1439-21sh21:40:540
2732399337,5cyclictest81rcu_preempt23:15:160
2732399334,4cyclictest81rcu_preempt21:36:020
27323993326,4cyclictest15489-21ssh00:09:560
2732399332,18cyclictest0-21swapper/000:12:410
2732399331,6cyclictest16730-21ssh23:04:140
27323993314,7cyclictest24944-21ntp_states23:45:260
236712331,5sleep00-21swapper/000:52:230
226902331,29sleep022702-21ssh00:16:230
208962331,5sleep00-21swapper/020:30:240
18912331,28sleep11907-21iostat_ios23:55:221
277692322,7sleep10-21swapper/122:41:291
2732499324,5cyclictest81rcu_preempt19:40:171
2732499324,4cyclictest81rcu_preempt23:43:101
2732499324,4cyclictest81rcu_preempt21:25:011
27324993224,6cyclictest0-21swapper/100:22:561
27324993221,7cyclictest5792-21ssh22:19:471
2732499321,6cyclictest1877-21ssh22:48:571
2732499321,5cyclictest0-21swapper/121:14:561
2732499321,29cyclictest0-21swapper/121:52:561
2732499321,28cyclictest0-21swapper/120:49:561
27323993225,4cyclictest19871-21ssh00:47:550
27323993224,6cyclictest0-21swapper/000:40:360
2732399321,29cyclictest0-21swapper/020:15:350
2732399321,29cyclictest0-21swapper/019:52:550
2732399321,27cyclictest2309-21cron21:30:000
27323993211,4cyclictest0-21swapper/021:49:080
203232321,27sleep020337-21ssh22:34:460
192702321,5sleep10-21swapper/122:33:151
101312321,5sleep00-21swapper/000:04:100
101312321,5sleep00-21swapper/000:04:100
290342311,3sleep029045-21ssh00:23:320
2732499319,18cyclictest0-21swapper/123:05:271
2732499315,4cyclictest81rcu_preempt19:35:221
2732499313,5cyclictest0-21swapper/123:52:551
2732499313,4cyclictest81rcu_preempt22:26:311
27324993124,4cyclictest23970-21ssh00:52:551
2732499312,26cyclictest22-21ksoftirqd/100:19:061
2732499311,5cyclictest81rcu_preempt23:00:171
2732499311,4cyclictest81rcu_preempt00:40:181
27324993114,5cyclictest40550irq/92-i91521:19:561
27324993112,15cyclictest12970-21df20:10:161
2732499311,12cyclictest3302-21runrttasks20:03:421
2732499311,10cyclictest81rcu_preempt00:05:421
2732399313,25cyclictest3-21ksoftirqd/021:31:330
2732399312,15cyclictest22397-21/usr/sbin/munin23:10:300
2732399311,4cyclictest81rcu_preempt23:50:020
27323993112,6cyclictest27586-21awk20:50:010
2732399311,26cyclictest1968-21lldpad23:06:370
27323993112,4cyclictest21613-21ssh22:01:520
2732399311,14cyclictest10455-21ntpdc21:50:240
27323993110,6cyclictest15913-21ssh23:35:470
127732311,5sleep00-21swapper/022:25:520
313132301,5sleep00-21swapper/019:31:020
279512301,5sleep10-21swapper/122:09:031
279512301,5sleep10-21swapper/122:09:031
2732499303,4cyclictest81rcu_preempt21:57:021
27324993023,4cyclictest30778-21unixbench_multi20:55:271
27324993022,5cyclictest4500-21ssh23:25:041
27324993020,6cyclictest19360-21/usr/sbin/munin20:25:281
2732499301,4cyclictest81rcu_preempt00:29:361
2732499301,4cyclictest81rcu_preempt00:02:571
2732499301,4cyclictest81rcu_preempt00:02:571
2732399301,27cyclictest0-21swapper/019:35:400
27323993012,5cyclictest6918-21iostat_ios22:20:190
27323993012,5cyclictest17288-21ntp_states20:20:260
27323993011,6cyclictest8779-21munin-run20:00:010
27323993011,6cyclictest18797-21perl20:25:170
255852301,4sleep00-21swapper/020:43:590
218502304,4sleep181rcu_preempt20:34:211
99852291,5sleep00-21swapper/000:36:460
3952291,5sleep00-21swapper/021:01:200
310112291,5sleep00-21swapper/020:56:480
291982291,5sleep00-21swapper/020:52:280
290112291,3sleep10-21swapper/120:50:321
2732499292,4cyclictest81rcu_preempt21:04:491
2732499291,4cyclictest81rcu_preempt21:48:201
2732399296,11cyclictest8353-21tune2fs22:55:160
27323992911,6cyclictest5568-21ssh21:12:020
27323992911,5cyclictest0-21swapper/020:10:250
2732499282,4cyclictest81rcu_preempt00:39:441
27324992820,5cyclictest11154-21fschecks_count20:05:151
27323992810,5cyclictest11042-21ls20:05:120
178422281,5sleep10-21swapper/120:21:401
103212281,5sleep00-21swapper/020:01:430
65762271,5sleep10-21swapper/119:51:591
24792271,5sleep10-21swapper/121:08:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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