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2026-06-21 - 14:16

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 Sun Jun 21, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
104589912141188,23cyclictest0-21swapper/019:27:290
101462564518,32sleep10-21swapper/119:22:181
100162553472,66sleep00-21swapper/019:20:580
10459992361,232cyclictest0-21swapper/119:27:301
266932830,6sleep126688-21strings21:30:221
243542430,4sleep1211ktimersoftd/121:25:151
174672351,4sleep011564-21packagekitd22:30:400
10458993525,6cyclictest24020-21memory00:15:220
10458993517,6cyclictest3-21ksoftirqd/022:50:320
1045999341,13cyclictest0-21swapper/121:49:431
1045999336,3cyclictest81rcu_preempt20:02:411
1045899337,13cyclictest19190-21timerwakeupswit22:35:280
10458993313,5cyclictest7356-21iostat22:05:210
1045899331,15cyclictest0-21swapper/000:50:140
1045999326,6cyclictest3286-21runrttasks23:24:121
1045899329,11cyclictest11565-21gdbus20:46:200
1045899323,16cyclictest0-21swapper/023:20:270
10458993210,7cyclictest32599-21pidof00:40:010
266242311,26sleep026689-21grep21:30:210
1045999319,7cyclictest28123-21fschecks_count21:35:151
10459993121,6cyclictest30497-21/usr/sbin/munin21:40:241
1045899314,12cyclictest20427-21open_files00:05:260
1045899312,26cyclictest0-21swapper/020:05:500
1045899312,16cyclictest0-21swapper/023:30:180
1045899311,19cyclictest1707-21taskset00:41:480
291832300,8sleep11045999cyclictest20:10:271
184332301,5sleep00-21swapper/019:43:160
147232300,8sleep01045899cyclictest21:00:100
1045999309,5cyclictest0-21swapper/119:51:521
1045999307,5cyclictest40250irq/92-i91523:00:011
1045999305,4cyclictest81rcu_preempt00:53:511
1045999305,4cyclictest81rcu_preempt00:26:581
1045999304,19cyclictest591-21diskstats00:40:141
1045999303,12cyclictest9329-21memory22:10:221
10459993020,7cyclictest17350-21tail22:30:301
1045999301,4cyclictest81rcu_preempt00:35:041
1045999301,16cyclictest27536-21sed20:05:281
10459993010,6cyclictest14550-21kernelversion23:50:211
10458993012,5cyclictest926-21df_inode23:15:160
10458993010,17cyclictest0-21swapper/023:10:130
45382291,5sleep00-21swapper/021:58:170
45382291,5sleep00-21swapper/021:58:160
314852291,5sleep00-21swapper/020:17:110
268402291,5sleep00-21swapper/000:23:560
194162291,5sleep10-21swapper/122:36:251
18422291,5sleep10-21swapper/121:50:271
165662291,5sleep00-21swapper/019:38:340
159012291,5sleep10-21swapper/122:28:541
1045999296,4cyclictest81rcu_preempt19:40:291
1045999296,4cyclictest81rcu_preempt00:07:231
1045999295,4cyclictest81rcu_preempt20:43:101
1045999295,3cyclictest81rcu_preempt22:09:491
1045999295,3cyclictest81rcu_preempt21:56:371
1045999295,3cyclictest81rcu_preempt21:56:371
1045999294,4cyclictest81rcu_preempt20:46:551
1045999294,19cyclictest13021-21iostat_ios22:20:201
10459992919,6cyclictest30100-21cut23:05:231
1045999291,4cyclictest81rcu_preempt22:50:131
1045999291,4cyclictest81rcu_preempt00:34:091
1045999290,6cyclictest81rcu_preempt20:19:081
1045899292,14cyclictest3644-21diskstats20:30:130
1045899292,14cyclictest24062-21/usr/sbin/munin21:25:130
1045899292,13cyclictest16637-21ntp_states23:55:240
1045899291,24cyclictest17128-21irqstats21:05:190
1045899291,23cyclictest26132-21sh20:05:000
1045899291,16cyclictest0-21swapper/019:53:280
1045899291,15cyclictest28319-21/usr/sbin/munin00:25:290
1045899291,15cyclictest27626-21/usr/sbin/munin23:00:110
1045899291,15cyclictest14647-21tune2fs22:25:150
10458992910,6cyclictest1192-21cron20:25:010
62162281,5sleep10-21swapper/123:29:481
62162281,5sleep10-21swapper/123:29:481
60882281,5sleep00-21swapper/023:28:270
60882281,5sleep00-21swapper/023:28:270
47172281,5sleep10-21swapper/120:31:261
31342281,5sleep10-21swapper/120:29:341
312752281,5sleep00-21swapper/021:43:310
294442281,5sleep00-21swapper/021:39:110
267012281,6sleep10-21swapper/100:22:281
235012281,5sleep10-21swapper/121:20:561
212252281,5sleep00-21swapper/022:40:310
200522281,5sleep00-21swapper/021:14:170
197662281,5sleep10-21swapper/121:11:191
159662281,5sleep10-21swapper/121:00:531
142012281,5sleep10-21swapper/120:57:131
1045999289,6cyclictest2221-21cron20:25:011
1045999285,4cyclictest81rcu_preempt22:45:061
1045999285,4cyclictest81rcu_preempt20:35:471
1045999285,4cyclictest81rcu_preempt19:58:091
1045999284,3cyclictest81rcu_preempt00:16:271
1045999283,4cyclictest81rcu_preempt23:56:341
10459992818,6cyclictest6730-21wc22:05:011
1045999281,7cyclictest1323-21memory23:15:221
1045999281,5cyclictest81rcu_preempt23:10:251
1045899289,6cyclictest3286-21runrttasks23:51:490
1045899288,5cyclictest8670-21aten_r4power_en22:10:120
1045899288,11cyclictest0-21swapper/020:38:160
1045899285,7cyclictest1411-21wget20:25:120
1045899283,12cyclictest10782-21irqstats23:40:200
1045899282,3cyclictest81rcu_preempt00:10:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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