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2026-08-15 - 11:51

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 Aug 15, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
46979911651151,11cyclictest0-21swapper/119:29:361
45432562518,30sleep10-21swapper/119:24:001
42842557510,32sleep00-21swapper/019:21:140
46969911076,19cyclictest0-21swapper/019:29:360
305842970,3sleep0111rcuc/021:55:280
4696996410,15cyclictest122732chrt21:07:560
4696995911,5cyclictest28004-21latency_hist20:25:000
218982580,8sleep1469799cyclictest00:25:191
4696995511,6cyclictest23831-21kernelversion00:30:210
469699537,6cyclictest28928-21grep21:50:290
4696995315,6cyclictest20191-21fschecks_count22:55:140
469699528,7cyclictest8056-21wc23:50:010
469699522,16cyclictest21536-21python20:05:270
469699518,6cyclictest18650-21ls00:15:280
469699518,15cyclictest10050irq/91-xhci_hcd00:45:230
469699511,12cyclictest7539-21ps22:20:250
469699508,12cyclictest18425-21taskset19:59:350
469699502,17cyclictest0-21swapper/021:20:120
469699502,15cyclictest7564-21/usr/sbin/munin20:55:190
4696995017,6cyclictest30982-21tr00:50:110
4696995017,6cyclictest30982-21tr00:50:110
469699501,12cyclictest11377-21tr22:30:270
4696995010,6cyclictest16362cut20:40:160
469699494,9cyclictest16736-21memory22:45:190
469699492,6cyclictest20006-21/usr/sbin/munin00:20:180
469699492,16cyclictest11776-21munin-run00:00:010
469699492,15cyclictest15230-21/usr/sbin/munin19:50:140
469699492,11cyclictest0-21swapper/020:33:580
4696994916,6cyclictest3-21ksoftirqd/023:30:080
4696994914,5cyclictest16992-21runrttasks00:10:470
4696994913,6cyclictest23369-21runrttasks23:04:340
4696994913,5cyclictest13247-21irqstats21:10:200
4696994911,5cyclictest3771-21/usr/sbin/munin23:35:300
469699491,14cyclictest28832-21/usr/sbin/munin20:25:220
469699491,13cyclictest19638-21cron22:54:590
469699491,12cyclictest8857-21taskset19:32:520
4696994910,5cyclictest31831-21aten_r4power_cu20:35:120
469699484,9cyclictest0-21swapper/000:25:290
469699483,15cyclictest31993-21sort22:00:190
469699482,11cyclictest0-21swapper/020:10:200
469699481,7cyclictest4171-21/usr/sbin/munin20:45:260
469699481,7cyclictest32702-21taskset23:28:520
4696994814,4cyclictest9292-21aten_r4power_po19:35:100
4696994813,6cyclictest8971-21cut21:00:110
469699481,14cyclictest13301-21python22:35:280
469699481,12cyclictest0-21swapper/021:42:360
469699474,8cyclictest26501-21memory21:45:210
469699474,10cyclictest12236-21diskstats00:00:160
469699473,8cyclictest19119-21ntp_states21:25:230
469699471,16cyclictest14212-21/usr/sbin/munin19:45:260
469699471,14cyclictest8260-21/usr/sbin/munin23:50:120
469699471,12cyclictest15207-21memory21:15:210
469699471,11cyclictest3619-21grep22:10:220
469699469,5cyclictest5013-21irqstats23:40:210
469699467,5cyclictest2225-21dbus-daemon23:10:460
469699464,9cyclictest14867-21memory22:40:210
469699451,15cyclictest29873-21ls23:20:200
469699451,12cyclictest11565-21gdbus00:41:480
4696994510,4cyclictest11565-21gdbus00:38:560
469699449,5cyclictest8828-21diskstats22:25:160
469699447,5cyclictest19024-21grep20:00:160
469699442,17cyclictest22338-21/usr/sbin/munin21:35:150
469699441,11cyclictest11564-21packagekitd21:32:340
469699432,15cyclictest11621-21/usr/sbin/munin19:40:170
125482430,5sleep1211ktimersoftd/119:42:001
469699401,15cyclictest0-21swapper/020:54:120
469799362,19cyclictest733-21awk22:04:591
469799345,14cyclictest0-21swapper/121:17:201
469799342,19cyclictest23857-21df23:05:121
185132341,29sleep118526-21iostat_ios22:50:201
469799339,4cyclictest81rcu_preempt20:15:291
304582330,4sleep1211ktimersoftd/123:20:291
233642321,5sleep10-21swapper/121:36:001
469699312,15cyclictest24399-21/usr/sbin/munin23:05:240
313262311,5sleep10-21swapper/120:31:481
118062311,5sleep10-21swapper/122:31:441
88712301,5sleep10-21swapper/121:00:021
88362301,5sleep10-21swapper/119:32:391
469799301,4cyclictest81rcu_preempt22:26:231
469799301,4cyclictest81rcu_preempt22:19:471
4697993014,5cyclictest22-21ksoftirqd/123:47:171
469799301,16cyclictest8733-21cron21:00:001
469799301,16cyclictest2695-21snmpd00:41:161
4697993010,7cyclictest32358-21awk23:25:271
4697993010,4cyclictest81rcu_preempt22:20:141
315762301,4sleep131602-21ntp_states00:50:231
315762301,4sleep131602-21ntp_states00:50:231
23632301,5sleep10-21swapper/122:07:231
469799295,4cyclictest81rcu_preempt22:57:301
469799293,4cyclictest81rcu_preempt21:21:011
469799291,5cyclictest81rcu_preempt20:47:211
469799291,4cyclictest81rcu_preempt00:08:171
469799291,4cyclictest81rcu_preempt00:08:171
4697992914,12cyclictest22-21ksoftirqd/121:05:281
4697992912,5cyclictest20704-21unixbench_singl00:20:291
469799291,15cyclictest26822-21munin-run00:40:001
4697992910,6cyclictest26392-21tr20:20:121
469799290,5cyclictest81rcu_preempt20:41:591
272882291,5sleep10-21swapper/121:47:311
141932291,5sleep10-21swapper/121:13:211
469799289,7cyclictest0-21swapper/123:55:121
469799286,4cyclictest81rcu_preempt19:38:271
469799286,4cyclictest40250irq/92-i91523:15:251
469799286,4cyclictest40250irq/92-i91523:15:251
469799284,8cyclictest3161-21diskstats22:10:151
469799284,4cyclictest81rcu_preempt20:08:121
469799284,4cyclictest81rcu_preempt19:47:221
469799283,19cyclictest22997-21iostat_ios20:10:201
469799283,19cyclictest18886-21iostat_ios21:25:181
4697992819,5cyclictest1464-21find23:30:261
469799281,4cyclictest81rcu_preempt22:40:481
469799281,4cyclictest81rcu_preempt21:51:391
4697992810,5cyclictest40250irq/92-i91522:45:191
40652281,5sleep10-21swapper/123:38:231
311782281,5sleep10-21swapper/121:58:591
267382281,5sleep10-21swapper/123:10:371
173432281,5sleep10-21swapper/100:14:271
163292281,5sleep10-21swapper/119:52:201
97072271,5sleep10-21swapper/123:53:151
67062271,4sleep10-21swapper/120:53:491
469799274,4cyclictest81rcu_preempt00:02:271
469799271,5cyclictest2654-21sshd00:45:131
4697992712,12cyclictest23214-21/usr/sbin/munin00:30:101
4697992711,4cyclictest22-21ksoftirqd/120:35:181
469699271,4cyclictest81rcu_preempt00:05:130
469699271,4cyclictest81rcu_preempt00:05:120
4696992710,6cyclictest945-21aten_r4power_po22:05:100
4696992710,6cyclictest28362-21expr23:15:260
4696992710,6cyclictest28362-21expr23:15:250
253232271,5sleep10-21swapper/121:41:371
232552271,5sleep10-21swapper/123:03:231
202582271,5sleep10-21swapper/120:04:001
189462271,5sleep10-21swapper/100:16:371
181212271,5sleep10-21swapper/119:56:271
136882271,4sleep10-21swapper/122:36:481
293452261,5sleep10-21swapper/120:25:431
469799251,6cyclictest0-21swapper/121:30:251
4696992510,4cyclictest6162-21taskset22:16:490
4697992412,7cyclictest2225-21dbus-daemon23:40:101
4696992313,6cyclictest24766-21hddtemp_smartct20:15:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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