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2026-07-24 - 11:53

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 Fri Jul 24, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
276699911691160,6cyclictest0-21swapper/119:25:101
276689911021093,6cyclictest0-21swapper/019:25:050
258962660615,30sleep10-21swapper/119:20:031
273802465417,32sleep00-21swapper/019:22:310
524721000,4sleep10-21swapper/119:49:001
310162970,5sleep031018-21missed_timers19:30:200
146782880,8sleep12766999cyclictest23:05:171
31962570,8sleep02766899cyclictest22:35:140
304432460,5sleep1211ktimersoftd/123:45:281
90342450,21sleep122-21ksoftirqd/100:15:271
27669994116,4cyclictest81rcu_preempt19:35:271
187452390,3sleep00-21swapper/000:40:290
2766899371,15cyclictest0-21swapper/000:22:180
2766999363,4cyclictest81rcu_preempt20:20:271
2766899369,13cyclictest2054-21taskset23:57:380
2766899361,13cyclictest7474-21fschecks_time21:20:180
27668993610,12cyclictest25880-21fschecks_time23:35:140
39672351,30sleep13268-21/usr/sbin/munin21:10:241
307912341,29sleep030797-21ntp_states20:55:250
2766999346,4cyclictest81rcu_preempt21:20:021
27669993427,5cyclictest22-21ksoftirqd/119:35:001
2766899343,17cyclictest19015-21memory21:50:230
2766899341,17cyclictest20480-21uname23:20:210
192452341,29sleep119279-21grep20:25:191
140202341,4sleep014070-21wc20:10:270
312722331,28sleep111565-21gdbus22:24:201
2766999335,4cyclictest22-21ksoftirqd/100:01:061
2766899333,15cyclictest30279-21python23:45:270
2766899331,28cyclictest18917-21cstates20:25:120
158682331,9sleep00-21swapper/023:09:280
2766999328,6cyclictest102722cron22:55:011
2766999325,5cyclictest81rcu_preempt21:40:201
2766999325,4cyclictest81rcu_preempt23:43:531
2766999321,5cyclictest81rcu_preempt21:46:381
27668993210,4cyclictest19683-21idleruntime-cro23:20:010
223382321,26sleep122421-21memory23:25:201
195242321,5sleep00-21swapper/000:45:060
155032321,5sleep115508-21irqstats20:15:191
81442310,4sleep1201rcuc/119:55:241
2766999315,4cyclictest26441-21mailstats23:35:241
2766999312,15cyclictest6108-21iostat_ios19:50:201
27669993116,12cyclictest22-21ksoftirqd/121:00:181
27669993115,4cyclictest22-21ksoftirqd/121:10:001
2766899312,4cyclictest81rcu_preempt20:09:490
2766899311,5cyclictest81rcu_preempt21:35:250
27668993113,5cyclictest769-21munin-run22:30:000
2766899311,27cyclictest0-21swapper/022:40:110
2766899311,13cyclictest31592-21fschecks_time23:50:170
178562311,5sleep00-21swapper/021:46:530
78472301,5sleep10-21swapper/100:13:011
286842301,4sleep028688-21irqstats20:50:210
278422301,5sleep10-21swapper/120:49:111
2766999304,19cyclictest28328-21iostat_ios22:15:211
2766999303,18cyclictest0-21swapper/121:35:531
27669993015,4cyclictest22-21ksoftirqd/120:00:311
2766999301,4cyclictest81rcu_preempt22:38:361
2766999301,4cyclictest81rcu_preempt22:28:281
2766999301,4cyclictest81rcu_preempt21:20:181
2766999301,24cyclictest10935-21ntp_states00:20:251
2766899306,12cyclictest12805-21ntp_states00:25:250
2766899302,15cyclictest32202-21/usr/sbin/munin19:35:280
2766899301,4cyclictest81rcu_preempt20:02:020
27668993012,6cyclictest27472-21users20:45:320
27668993011,6cyclictest3794-21sed00:00:300
27668993011,6cyclictest27685-21diskstats23:40:150
2766899301,13cyclictest9397-21ntp_states22:50:260
87532291,5sleep00-21swapper/019:56:260
81232291,5sleep00-21swapper/022:47:080
66712291,5sleep00-21swapper/021:17:590
2766999294,4cyclictest81rcu_preempt23:02:431
2766999291,4cyclictest81rcu_preempt21:54:031
2766999291,4cyclictest81rcu_preempt20:35:521
27669992912,9cyclictest0-21swapper/123:32:121
2766899292,8cyclictest24923-21iostat20:40:190
2766899292,13cyclictest14910-21/usr/sbin/munin20:15:150
2766899291,4cyclictest81rcu_preempt19:45:100
2766899291,15cyclictest4111-21/usr/sbin/munin21:10:260
2766899291,15cyclictest12733-21fschecks_time23:00:180
2766899291,14cyclictest943-21tr22:30:110
2766899291,14cyclictest14168-21fschecks_count00:30:150
2766899291,14cyclictest10059-21sort21:25:290
257962291,5sleep10-21swapper/120:42:281
256002291,5sleep00-21swapper/022:09:080
238862291,5sleep00-21swapper/020:37:180
237152291,5sleep00-21swapper/022:04:020
214092291,5sleep00-21swapper/000:50:070
174032291,5sleep00-21swapper/023:10:550
147102291,5sleep10-21swapper/120:14:391
118352291,5sleep00-21swapper/022:56:440
76422281,5sleep00-21swapper/000:10:560
32442281,5sleep10-21swapper/119:42:481
310882281,5sleep00-21swapper/022:22:250
296942281,5sleep10-21swapper/120:53:581
2766999289,8cyclictest22-21ksoftirqd/123:17:291
2766999285,4cyclictest81rcu_preempt00:31:551
2766999284,4cyclictest81rcu_preempt22:05:151
2766999284,18cyclictest11758-21iostat_ios20:05:201
2766999282,21cyclictest20498-21diskstats21:55:151
2766999281,4cyclictest81rcu_preempt22:40:101
2766999281,4cyclictest81rcu_preempt21:30:411
2766999281,4cyclictest81rcu_preempt21:25:291
2766999281,12cyclictest16046-21sort00:35:161
2766999281,12cyclictest16046-21sort00:35:161
27669992810,14cyclictest2695-21snmpd20:55:281
2766899282,14cyclictest15857-21chrt21:40:330
2766899282,13cyclictest2118-21ntp_states21:05:250
27668992819,5cyclictest5976-21cut19:50:170
2766899281,4cyclictest81rcu_preempt21:00:130
2766899281,14cyclictest22553-21grep23:25:230
2766899281,14cyclictest16038-21/usr/sbin/munin00:35:170
2766899281,14cyclictest16038-21/usr/sbin/munin00:35:160
275442281,5sleep00-21swapper/022:14:540
229872281,5sleep10-21swapper/100:53:341
219162281,4sleep00-21swapper/020:31:190
217782281,5sleep00-21swapper/021:58:380
182512281,5sleep00-21swapper/020:22:120
174472281,5sleep10-21swapper/123:11:231
95972271,4sleep00-21swapper/000:16:440
2766999278,6cyclictest0-21swapper/123:56:111
2766999275,4cyclictest81rcu_preempt00:07:041
2766999274,4cyclictest81rcu_preempt23:20:571
2766999273,4cyclictest81rcu_preempt22:45:571
27669992719,5cyclictest21730-21unixbench_multi20:30:271
2766999271,4cyclictest81rcu_preempt22:55:241
2766899272,4cyclictest81rcu_preempt23:32:220
2766899272,13cyclictest0-21swapper/000:05:200
2766899271,14cyclictest2198-21/usr/sbin/munin19:40:180
271672271,4sleep10-21swapper/122:10:591
237282271,5sleep10-21swapper/122:04:121
22602271,5sleep10-21swapper/122:30:591
210192271,5sleep10-21swapper/100:47:361
189462271,5sleep10-21swapper/100:40:591
124032271,4sleep00-21swapper/021:33:520
119742271,5sleep10-21swapper/100:25:091
2766999266,4cyclictest81rcu_preempt23:53:041
2766899261,4cyclictest81rcu_preempt22:15:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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