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2026-01-01 - 15:38

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 Thu Jan 01, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194499911801160,17cyclictest0-21swapper/107:25:101
193212563517,31sleep10-21swapper/107:24:151
192672488409,64sleep00-21swapper/007:23:400
1944899191182,5cyclictest23996-21latency_hist07:35:010
1944899150120,25cyclictest0-21swapper/007:25:110
799621380,8sleep01944899cyclictest11:02:430
799621380,8sleep01944899cyclictest11:02:420
132632850,8sleep01944899cyclictest12:15:140
253702800,8sleep01944899cyclictest10:14:220
93372780,4sleep041ktimersoftd/010:30:280
310842530,8sleep11944999cyclictest12:00:151
19448994826,6cyclictest3-21ksoftirqd/010:01:440
309662441,25sleep027496-21diskmemload09:45:430
259892440,8sleep01944899cyclictest09:40:310
19448994426,6cyclictest3-21ksoftirqd/011:45:240
92992420,6sleep09277-21ssh12:45:010
101222410,5sleep0111rcuc/009:25:120
4562390,8sleep01944899cyclictest12:01:310
250242390,9sleep11944999cyclictest10:46:341
19448993918,5cyclictest3-21ksoftirqd/011:50:280
1944899391,24cyclictest1500-21users10:55:310
19448993818,5cyclictest3-21ksoftirqd/011:30:190
19449993723,11cyclictest0-21swapper/112:28:161
1944999372,30cyclictest5147-21df12:40:151
1944999371,6cyclictest4448-21taskset10:59:361
1944899377,14cyclictest21793-21seq08:54:330
1944899374,26cyclictest9737-21diskstats12:45:140
19448993715,11cyclictest3-21ksoftirqd/011:55:120
1944899371,23cyclictest30355-21ssh10:52:180
152092371,19sleep10-21swapper/108:35:251
1944999364,19cyclictest0-21swapper/109:55:281
19449993628,6cyclictest0-21swapper/108:58:151
1944999361,16cyclictest21796-21iostat_ios11:50:231
1944899363,29cyclictest0-21swapper/010:46:350
1944899363,29cyclictest0-21swapper/010:05:150
1944899362,7cyclictest0-21swapper/012:38:360
1944899362,30cyclictest0-21swapper/010:19:550
296682350,19sleep1211ktimersoftd/109:45:131
244732351,4sleep124493-21iostat_ios09:00:211
1944899353,4cyclictest0-21swapper/011:17:550
1944899351,7cyclictest25060-21ssh12:26:540
19448993513,6cyclictest3-21ksoftirqd/009:12:360
1944899351,14cyclictest4867-21sh09:20:000
116202351,30sleep111631-21ssh09:25:461
300222341,29sleep030073-21sed11:25:250
1944999347,4cyclictest81rcu_preempt11:35:141
1944999346,24cyclictest0-21swapper/110:31:251
1944999343,5cyclictest0-21swapper/108:15:351
1944999343,29cyclictest0-21swapper/110:01:361
19449993427,4cyclictest21045-21ssh11:15:361
1944999342,17cyclictest23151-21python07:30:311
1944899343,4cyclictest0-21swapper/009:20:350
1944899342,4cyclictest0-21swapper/012:09:550
1944899341,29cyclictest1968-21lldpad11:23:280
1944899341,21cyclictest7961-21python08:15:290
1944999335,4cyclictest81rcu_preempt12:13:051
1944999334,4cyclictest81rcu_preempt11:26:231
1944999333,28cyclictest0-21swapper/108:07:371
19449993325,6cyclictest0-21swapper/108:04:151
1944999331,5cyclictest5354-21ssh11:00:161
1944999331,5cyclictest5354-21ssh11:00:151
19449993310,4cyclictest81rcu_preempt10:27:361
19449993310,18cyclictest0-21swapper/110:39:561
1944899338,11cyclictest18251-21fschecks_time12:20:170
1944899337,15cyclictest2265-21tune2fs09:50:170
1944899337,14cyclictest0-21swapper/010:44:250
1944899332,4cyclictest0-21swapper/011:13:560
19448993317,5cyclictest3-21ksoftirqd/011:37:210
19448993313,5cyclictest3-21ksoftirqd/012:33:060
1944899331,12cyclictest19997-21ssh09:35:140
166632331,5sleep10-21swapper/112:18:491
1944999325,4cyclictest81rcu_preempt12:30:181
1944999324,5cyclictest81rcu_preempt11:05:141
1944999324,4cyclictest81rcu_preempt09:32:351
1944999324,4cyclictest81rcu_preempt09:20:321
1944999324,4cyclictest81rcu_preempt09:19:451
1944999324,11cyclictest24706-21diskstats11:20:141
1944999323,4cyclictest81rcu_preempt08:46:461
19449993224,6cyclictest0-21swapper/109:41:001
19449993222,6cyclictest4974-21ssh12:05:521
19449993221,8cyclictest0-21swapper/112:20:551
1944999321,6cyclictest16912-21ssh11:11:371
1944999321,5cyclictest0-21swapper/108:52:161
1944899327,11cyclictest2123-21processes08:00:270
19448993222,6cyclictest13740-21/usr/sbin/munin08:30:320
1944899322,14cyclictest17192-21ntp_states08:40:230
19448993217,5cyclictest3-21ksoftirqd/011:42:200
19448993217,5cyclictest3-21ksoftirqd/010:23:160
1944899321,5cyclictest1968-21lldpad10:37:570
1944899321,4cyclictest13440-21ssh11:08:350
1944999314,4cyclictest81rcu_preempt10:54:281
1944999313,4cyclictest81rcu_preempt12:37:001
1944999313,4cyclictest81rcu_preempt11:41:001
1944999311,4cyclictest81rcu_preempt10:06:081
1944999311,4cyclictest81rcu_preempt09:54:291
1944999311,4cyclictest81rcu_preempt09:10:311
1944899318,10cyclictest0-21swapper/012:10:150
1944899314,4cyclictest81rcu_preempt10:26:490
1944899313,4cyclictest81rcu_preempt09:31:300
19448993124,5cyclictest0-21swapper/008:38:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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