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2026-09-05 - 14:45

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 Sep 05, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214709912351195,36cyclictest23452-21sed19:30:011
213462666600,50sleep00-21swapper/019:24:170
212892463419,30sleep10-21swapper/119:23:411
2146999180144,29cyclictest3434-21munin-node19:30:010
140932970,5sleep114094-21aten_r4power_vo21:55:121
222082830,3sleep10-21swapper/122:15:201
279052580,9sleep02146999cyclictest19:40:100
170372410,4sleep041ktimersoftd/000:55:000
2146999408,5cyclictest81rcu_preempt22:00:270
2146999372,22cyclictest26805-21ntpdc19:35:230
2146999351,21cyclictest30159-21grep21:10:220
21470993424,6cyclictest25783-21perl22:25:151
2146999343,17cyclictest14669-21python23:20:280
2146999341,21cyclictest24921-21taskset23:50:020
2146999341,20cyclictest976-21awk00:10:270
81812331,4sleep18186-21cron21:40:001
2146999338,13cyclictest8036-21grep20:10:300
21469993310,6cyclictest10417-21cron20:20:000
21470993214,6cyclictest18502-21uname22:05:231
2147099321,14cyclictest30602ls22:50:201
2146999329,11cyclictest0-21swapper/000:35:120
2146999327,13cyclictest20472-21ntp_states22:10:230
2146999322,14cyclictest31064-21hddtemp_smartct00:05:160
2146999321,19cyclictest3547-21ntp_states21:25:250
2146999321,13cyclictest0-21swapper/021:18:110
324582311,26sleep132475-21/usr/sbin/munin19:50:241
324582311,26sleep132475-21/usr/sbin/munin19:50:231
288492311,5sleep10-21swapper/121:05:571
2147099315,5cyclictest81rcu_preempt00:00:241
21470993122,5cyclictest7475-21cat20:10:221
21470993115,4cyclictest22-21ksoftirqd/122:30:271
21470993111,6cyclictest0-21swapper/120:09:591
2146999318,6cyclictest11565-21gdbus23:44:510
2146999318,10cyclictest11565-21gdbus23:04:200
2146999317,20cyclictest9349-21cron00:35:000
2146999312,15cyclictest1565-21hddtemp_smartct19:55:160
2146999311,4cyclictest81rcu_preempt22:51:310
2146999311,14cyclictest0-21swapper/022:15:140
2146999311,13cyclictest13100-21runrttasks23:16:090
197352311,5sleep10-21swapper/120:43:581
2147099302,7cyclictest25022-21users20:55:291
2147099301,4cyclictest81rcu_preempt21:20:171
2146999302,14cyclictest10173-21diskstats23:10:150
21469993012,13cyclictest14175-21/usr/sbin/munin00:45:250
2146999301,13cyclictest17123-21taskset23:28:470
2146999301,13cyclictest17123-21taskset23:28:460
21469993010,8cyclictest2107-21pidof22:50:000
4962291,5sleep00-21swapper/019:50:530
4962291,5sleep00-21swapper/019:50:530
45192291,5sleep00-21swapper/020:02:110
36682291,5sleep00-21swapper/000:19:430
302972291,5sleep00-21swapper/000:03:500
288512291,5sleep00-21swapper/021:05:580
287102291,5sleep00-21swapper/022:33:120
26412291,24sleep12738-21aten_r4power_vo21:25:131
254262291,5sleep10-21swapper/119:30:451
24412291,5sleep10-21swapper/119:56:151
22742291,5sleep00-21swapper/021:23:050
2147099295,4cyclictest81rcu_preempt00:49:561
2147099294,4cyclictest81rcu_preempt23:33:161
2147099294,4cyclictest81rcu_preempt23:00:401
2147099294,4cyclictest81rcu_preempt20:34:581
2147099292,23cyclictest19558-21df23:35:111
21470992921,5cyclictest5073-21fschecks_time21:30:151
2147099291,4cyclictest81rcu_preempt20:02:581
2147099291,4cyclictest0-21swapper/120:18:411
2146999293,13cyclictest26307-21latency21:00:200
2146999292,15cyclictest0-21swapper/020:55:400
2146999292,14cyclictest6357-21iostat_ios00:25:200
2146999292,14cyclictest24405-21df19:30:110
2146999292,14cyclictest20491-21/usr/sbin/munin20:45:160
2146999292,13cyclictest8296-21diskstats23:05:140
2146999292,13cyclictest2225-21dbus-daemon19:45:360
2146999292,13cyclictest18005-21irqstats23:30:190
2146999291,4cyclictest81rcu_preempt22:42:320
2146999291,4cyclictest81rcu_preempt22:42:320
21469992912,5cyclictest7487-21python21:35:270
2146999291,15cyclictest24255-21ntp_states22:20:260
21469992911,5cyclictest18600-21fschecks_time20:40:150
2146999291,14cyclictest5610-21python21:30:260
2146999291,14cyclictest4427-21grep22:55:120
21469992910,7cyclictest26313-21python22:25:260
21469992910,15cyclictest12122-21taskset21:50:090
18722291,5sleep10-21swapper/122:47:501
142912291,4sleep114342-21memory23:20:221
116322291,5sleep00-21swapper/021:46:370
293522281,5sleep10-21swapper/119:42:221
282452281,5sleep10-21swapper/123:57:121
262652281,5sleep10-21swapper/123:51:041
2147099289,7cyclictest22-21ksoftirqd/100:20:181
2147099286,4cyclictest81rcu_preempt20:36:271
2147099285,4cyclictest81rcu_preempt00:28:301
2147099284,8cyclictest5060-21ntp_states22:55:241
2147099284,8cyclictest15794-21iostat_ios00:50:161
2147099284,4cyclictest81rcu_preempt20:52:261
2147099284,4cyclictest81rcu_preempt19:46:291
2147099283,4cyclictest81rcu_preempt21:43:051
21470992818,6cyclictest30599-21aten_r4power_cu00:05:101
2147099281,7cyclictest12814-21ls23:15:271
2147099281,6cyclictest8004-21/usr/sbin/munin23:05:241
2147099281,12cyclictest32709-21cron21:16:591
21470992810,5cyclictest0-21swapper/121:00:201
2146999287,9cyclictest0-21swapper/021:55:420
2146999281,4cyclictest81rcu_preempt00:42:020
2146999281,18cyclictest0-21swapper/023:59:210
21469992811,5cyclictest4996-21ls00:20:300
21469992810,5cyclictest9629-21users21:40:280
21469992810,5cyclictest16526-21diskstats20:35:140
211392281,5sleep10-21swapper/122:12:481
163782281,3sleep10-21swapper/122:00:171
134362281,5sleep10-21swapper/121:50:531
274782271,5sleep10-21swapper/119:37:351
2147099273,4cyclictest81rcu_preempt22:20:381
2147099273,18cyclictest29999-21iostat21:10:191
2147099273,15cyclictest0-21swapper/121:46:121
2147099272,4cyclictest81rcu_preempt23:25:041
2147099272,4cyclictest81rcu_preempt23:25:031
2147099272,3cyclictest81rcu_preempt22:38:501
2147099271,22cyclictest23570-21sed23:45:171
2146999272,13cyclictest18500-21/usr/sbin/munin22:05:230
2146999272,13cyclictest11565-21gdbus20:07:590
2146999272,12cyclictest0-21swapper/020:25:130
2146999271,15cyclictest20805-21taskset23:38:010
2146999271,13cyclictest29644-21iostat_ios22:35:180
2146999271,13cyclictest23844-21/usr/sbin/munin23:45:220
2146999271,13cyclictest22972-21ls20:50:270
212882271,5sleep10-21swapper/120:45:351
14502271,5sleep10-21swapper/100:12:241
140172271,5sleep10-21swapper/120:28:121
101972271,5sleep10-21swapper/100:35:211
2147099263,4cyclictest81rcu_preempt00:17:071
2147099262,4cyclictest81rcu_preempt20:23:581
21470992616,6cyclictest22-21ksoftirqd/123:14:541
2146999261,14cyclictest0-21swapper/020:30:240
2146999261,13cyclictest12462-21latency_hist20:25:010
130042261,4sleep10-21swapper/100:43:491
2147099259,12cyclictest0-21swapper/123:40:271
2147099251,9cyclictest32609-21sshd22:44:331
2147099251,9cyclictest32609-21sshd22:44:321
2147099246,5cyclictest0-21swapper/100:30:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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