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2026-08-16 - 14:18

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 Sun Aug 16, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
72409912611238,20cyclictest0-21swapper/119:30:011
64582552505,31sleep00-21swapper/019:20:280
68862527482,30sleep10-21swapper/119:21:521
7239999759,25cyclictest9111-21pidof19:30:000
124182810,4sleep041ktimersoftd/021:00:280
177202500,4sleep1201rcuc/119:50:161
154982450,2sleep015497-21latency22:35:230
154982450,2sleep015497-21latency22:35:230
7240994124,6cyclictest22-21ksoftirqd/100:35:291
7240994025,5cyclictest22-21ksoftirqd/123:02:331
7240994023,6cyclictest22-21ksoftirqd/119:55:401
7240993917,6cyclictest22-21ksoftirqd/120:30:291
7240993824,5cyclictest22-21ksoftirqd/100:20:101
7240993823,5cyclictest22-21ksoftirqd/119:34:181
7240993822,6cyclictest22-21ksoftirqd/123:06:231
7240993822,5cyclictest22-21ksoftirqd/121:53:201
7240993821,6cyclictest22-21ksoftirqd/123:52:171
187782381,5sleep118803-21latency_hist21:20:001
102722381,33sleep12695-21snmpd23:47:041
7240993723,5cyclictest22-21ksoftirqd/123:25:361
7240993721,5cyclictest22-21ksoftirqd/119:35:181
7240993720,6cyclictest22-21ksoftirqd/122:18:021
7240993720,6cyclictest22-21ksoftirqd/121:07:301
7240993720,5cyclictest22-21ksoftirqd/100:44:201
7240993621,5cyclictest22-21ksoftirqd/121:24:081
7240993621,5cyclictest22-21ksoftirqd/120:03:471
7240993620,6cyclictest22-21ksoftirqd/122:49:091
7240993620,6cyclictest22-21ksoftirqd/100:27:051
7240993620,5cyclictest22-21ksoftirqd/100:10:591
7240993619,6cyclictest22-21ksoftirqd/122:40:081
7240993619,6cyclictest22-21ksoftirqd/121:58:521
7240993619,6cyclictest22-21ksoftirqd/121:26:091
7240993611,9cyclictest5258-21cron22:10:011
724099352,19cyclictest0-21swapper/100:30:141
7240993521,5cyclictest22-21ksoftirqd/123:36:501
7240993520,5cyclictest22-21ksoftirqd/122:36:481
7240993520,5cyclictest22-21ksoftirqd/122:36:471
7240993519,6cyclictest22-21ksoftirqd/100:47:321
7240993519,5cyclictest22-21ksoftirqd/123:12:171
7240993519,5cyclictest22-21ksoftirqd/120:55:541
7240993519,5cyclictest22-21ksoftirqd/119:46:411
182432352,4sleep011565-21gdbus00:10:110
724099343,19cyclictest126712sleep122:28:441
7240993419,5cyclictest22-21ksoftirqd/123:18:281
7240993419,5cyclictest22-21ksoftirqd/120:50:371
7240993419,5cyclictest22-21ksoftirqd/120:40:501
7240993419,5cyclictest22-21ksoftirqd/100:18:421
7240993319,5cyclictest22-21ksoftirqd/119:42:041
7240993319,4cyclictest22-21ksoftirqd/122:54:011
7240993317,6cyclictest22-21ksoftirqd/122:01:551
7240993316,6cyclictest22-21ksoftirqd/100:08:321
7240993316,6cyclictest22-21ksoftirqd/100:08:311
723999332,12cyclictest11054-21tune2fs23:50:160
724099329,7cyclictest22-21ksoftirqd/121:33:001
724099328,6cyclictest4917-21cron23:35:001
724099322,11cyclictest23156-21ntpq22:55:261
7240993215,6cyclictest22-21ksoftirqd/121:48:261
724099321,17cyclictest10388-21sed22:20:291
724099321,11cyclictest14947-21fschecks_time00:00:191
7239993221,7cyclictest14404-21/usr/sbin/munin21:05:290
723999321,20cyclictest22020-21grep21:25:290
7239993211,6cyclictest16507-21seq21:10:570
261262321,5sleep10-21swapper/121:38:051
146122321,5sleep10-21swapper/122:34:261
81892311,5sleep08248-21grep20:50:170
724099311,9cyclictest28201-21cron21:45:011
723999317,4cyclictest26569-21fschecks_time23:05:180
723999312,4cyclictest81rcu_preempt23:45:160
723999311,7cyclictest81rcu_preempt21:32:590
7240993016,4cyclictest22-21ksoftirqd/120:11:521
7240993015,5cyclictest22-21ksoftirqd/123:42:501
7240993015,5cyclictest22-21ksoftirqd/123:22:011
7240993015,5cyclictest22-21ksoftirqd/121:12:511
7240993015,5cyclictest22-21ksoftirqd/120:26:041
724099301,18cyclictest0-21swapper/123:57:041
7239993019,6cyclictest31968-21turbostat.cron21:55:000
723999301,4cyclictest81rcu_preempt22:33:020
301812301,5sleep10-21swapper/120:22:241
281682301,5sleep10-21swapper/120:16:121
239182301,5sleep00-21swapper/022:58:250
18922301,26sleep11975-21/usr/sbin/munin00:50:291
18922301,26sleep11975-21/usr/sbin/munin00:50:291
724099292,7cyclictest6438-21python22:10:271
724099291,13cyclictest2383-21perl20:35:181
723999299,6cyclictest30772-21cpuspeed_turbos20:25:160
723999296,5cyclictest15487-21mailstats00:00:290
723999294,14cyclictest0-21swapper/020:15:570
723999293,4cyclictest81rcu_preempt20:12:040
723999292,7cyclictest4907-21munin-run23:35:000
723999291,4cyclictest81rcu_preempt23:40:210
7239992911,15cyclictest8832-21sshd22:18:020
7239992910,6cyclictest17490-21fschecks_time21:15:160
70892291,5sleep00-21swapper/022:14:320
215922291,5sleep00-21swapper/000:17:310
724099281,9cyclictest3286-21runrttasks21:00:011
724099281,8cyclictest7011-21sed20:45:311
723999288,7cyclictest0-21swapper/019:45:190
723999284,17cyclictest330-21python23:20:270
723999282,6cyclictest28477-21ntpq00:35:250
7239992818,6cyclictest4490-21taskset22:05:250
7239992817,6cyclictest20549-21unixbench_singl19:55:290
723999281,4cyclictest81rcu_preempt23:00:080
723999281,23cyclictest1739-21munin-run20:35:000
723999281,12cyclictest30517-21mailstats00:40:270
723999281,11cyclictest2366-21fschecks_time20:35:170
7239992810,5cyclictest9619-21fschecks_count19:30:050
7239992810,5cyclictest484-21ntp_states21:55:230
723999280,4cyclictest81rcu_preempt21:38:450
292912281,5sleep00-21swapper/023:10:340
278122281,5sleep00-21swapper/021:40:590
25222281,5sleep00-21swapper/023:25:380
245482281,5sleep10-21swapper/120:07:341
237092281,5sleep00-21swapper/000:24:500
227902281,5sleep00-21swapper/020:03:490
201842281,5sleep00-21swapper/022:48:380
723999277,5cyclictest10389-21unixbench_multi22:20:290
723999273,10cyclictest0-21swapper/000:27:030
723999272,6cyclictest14689-21python19:40:270
723999272,12cyclictest5273-21cpuspeed_turbos23:35:130
723999271,8cyclictest0-21swapper/022:40:120
723999271,4cyclictest81rcu_preempt22:51:090
723999271,15cyclictest0-21swapper/000:48:520
723999271,13cyclictest30412-21ls23:15:200
7239992710,5cyclictest29732-21python20:20:260
7239992710,5cyclictest12074-21diskstats19:35:150
22142271,5sleep00-21swapper/000:51:020
22142271,5sleep00-21swapper/000:51:010
190092271,5sleep00-21swapper/019:53:430
123902271,5sleep00-21swapper/022:25:490
723999269,5cyclictest1593-21aten_r4power_cu22:00:150
723999268,6cyclictest17352-21/usr/sbin/munin00:05:300
723999268,6cyclictest17352-21/usr/sbin/munin00:05:290
723999266,11cyclictest0-21swapper/020:55:230
723999263,13cyclictest7006-21sed20:45:300
7239992616,6cyclictest3-21ksoftirqd/020:08:040
723999261,3cyclictest81rcu_preempt23:59:560
723999261,13cyclictest19924-21mailstats21:20:270
723999261,12cyclictest28400-21cut21:45:120
272352261,3sleep00-21swapper/000:32:280
723999251,4cyclictest81rcu_preempt20:43:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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