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2026-07-21 - 19:07

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 Tue Jul 21, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77279912561218,26cyclictest26133-21kworker/0:307:25:300
77289911711139,28cyclictest656-21irqstats11:20:211
73952566520,30sleep10-21swapper/107:22:051
72762563517,31sleep00-21swapper/007:20:510
77279911195,13cyclictest0-21swapper/011:20:210
7728996962,4cyclictest8890-21/usr/sbin/munin07:25:301
215032430,5sleep0111rcuc/010:50:130
237262420,13sleep140250irq/92-i91509:30:131
218852420,9sleep0772799cyclictest12:15:290
203082410,9sleep0772799cyclictest09:20:210
36862372,3sleep12309-21/usr/sbin/munin10:00:331
297762361,31sleep029948-21perl08:20:180
297762361,31sleep029948-21perl08:20:180
255802361,31sleep125587-21iostat_ios11:00:201
772799358,14cyclictest2420-21ntpdc12:50:230
772799351,7cyclictest81rcu_preempt10:32:240
139752351,5sleep12695-21snmpd10:30:141
105452351,5sleep110628-21memory10:20:211
7727993424,6cyclictest23500-21fschecks_time10:55:150
7727993418,7cyclictest237272cat09:30:130
183302341,27sleep018422-21mailstats10:40:270
181152341,29sleep118216-21cat12:05:281
772899338,10cyclictest2225-21dbus-daemon09:59:141
772899331,17cyclictest6001-21sh10:10:011
7727993316,6cyclictest3-21ksoftirqd/009:25:210
772799331,11cyclictest8735-21missed_timers10:15:220
289332331,3sleep028972-21latency_hist09:45:010
772799322,17cyclictest0-21swapper/008:39:400
772799321,18cyclictest14072-21pidof07:40:000
320662321,3sleep00-21swapper/011:17:190
320662321,3sleep00-21swapper/011:17:180
11592321,9sleep10-21swapper/112:47:131
104692321,4sleep110584-21mailstats11:45:281
772799314,7cyclictest11682-21users07:30:310
772799311,18cyclictest11565-21gdbus09:46:530
177432312,6sleep00-21swapper/007:47:200
772899306,4cyclictest81rcu_preempt09:22:391
772899305,3cyclictest81rcu_preempt09:07:211
772899302,12cyclictest3286-21runrttasks12:10:571
772899301,4cyclictest81rcu_preempt12:18:221
772899301,4cyclictest81rcu_preempt09:29:461
772799303,4cyclictest81rcu_preempt09:58:370
772799303,13cyclictest16527-21iostat_ios09:10:190
7727993011,6cyclictest31462-21perl09:50:180
7727993011,6cyclictest26813-21timerwakeupswit08:10:280
7727993010,7cyclictest27518-21python12:30:290
307962301,5sleep10-21swapper/108:21:051
307962301,5sleep10-21swapper/108:21:051
298102301,5sleep00-21swapper/012:37:090
285632301,5sleep00-21swapper/011:09:570
205082301,4sleep120603-21users10:45:281
194182301,5sleep00-21swapper/009:18:590
119052301,25sleep00-21swapper/010:25:150
98452291,5sleep10-21swapper/108:52:171
77862291,5sleep00-21swapper/008:45:310
772899296,4cyclictest81rcu_preempt10:12:011
772899295,4cyclictest81rcu_preempt07:32:591
772899294,18cyclictest16891-21iostat_ios07:45:211
772899291,4cyclictest81rcu_preempt08:42:581
7728992910,6cyclictest3286-21runrttasks11:59:291
772799296,12cyclictest6804-21mailstats11:35:290
772799293,12cyclictest4409-21perl11:30:170
772799292,14cyclictest23765-21python12:20:280
772799291,4cyclictest81rcu_preempt12:44:580
772799291,4cyclictest81rcu_preempt12:44:580
772799291,4cyclictest81rcu_preempt11:40:380
7727992912,5cyclictest81rcu_preempt09:00:010
7727992912,5cyclictest25917-21chrt12:25:390
7727992912,4cyclictest4881-21iostat_ios10:05:200
772799291,15cyclictest28138-21if_eth008:15:200
772799291,14cyclictest25722-21/usr/sbin/munin09:35:140
772799291,14cyclictest18480-21fschecks_count07:50:140
772799291,13cyclictest2864-21grep11:25:270
34712291,5sleep10-21swapper/111:27:021
319282291,5sleep10-21swapper/111:15:551
319282291,5sleep10-21swapper/111:15:541
31252291,5sleep10-21swapper/112:52:011
304092291,5sleep10-21swapper/111:14:381
285492291,5sleep10-21swapper/111:09:461
23762291,5sleep00-21swapper/008:33:530
230852291,5sleep10-21swapper/110:55:051
198222291,5sleep10-21swapper/107:54:271
191922292,23sleep10-21swapper/109:16:391
169742291,5sleep10-21swapper/110:36:521
168562291,24sleep00-21swapper/012:04:130
147752291,5sleep00-21swapper/011:57:170
130692291,5sleep00-21swapper/011:54:010
97062281,5sleep10-21swapper/110:19:331
772899283,4cyclictest81rcu_preempt10:40:211
772899282,4cyclictest12058-21irqstats11:50:211
772899281,9cyclictest4405-21tune2fs11:30:181
772899281,8cyclictest14044-21cron07:40:011
772899281,4cyclictest81rcu_preempt09:14:311
772899281,23cyclictest2666-21/usr/sbin/munin08:35:301
7728992811,13cyclictest0-21swapper/111:35:121
772799286,11cyclictest0-21swapper/007:55:250
772799283,14cyclictest0-21swapper/008:00:150
772799281,4cyclictest81rcu_preempt11:11:550
7727992812,12cyclictest15893-21latency_hist09:10:010
772799281,15cyclictest13187-21python09:00:280
772799281,13cyclictest18975-21/usr/sbin/munin12:10:150
318592281,5sleep10-21swapper/112:43:451
318592281,5sleep10-21swapper/112:43:451
267372281,5sleep10-21swapper/109:36:541
262272281,5sleep10-21swapper/112:28:561
242322281,5sleep10-21swapper/112:22:391
157222281,5sleep10-21swapper/107:42:491
157222281,5sleep10-21swapper/107:42:481
136532281,5sleep10-21swapper/109:02:391
133872281,5sleep10-21swapper/110:28:331
113732281,5sleep00-21swapper/010:22:060
772899276,4cyclictest81rcu_preempt07:58:411
772899274,17cyclictest8967-21users11:40:311
772899273,4cyclictest81rcu_preempt10:50:101
772899273,4cyclictest81rcu_preempt09:43:481
772899273,4cyclictest81rcu_preempt08:16:071
772799272,21cyclictest0-21swapper/011:49:380
772799272,12cyclictest0-21swapper/011:00:210
772799271,18cyclictest0-21swapper/010:00:090
772799271,13cyclictest32180-21basename12:45:110
772799271,13cyclictest11565-21gdbus12:06:290
3732271,5sleep10-21swapper/108:27:531
298022271,5sleep10-21swapper/112:37:031
295432271,5sleep10-21swapper/109:45:171
271812271,5sleep10-21swapper/108:12:471
21682271,5sleep10-21swapper/108:31:471
772899269,5cyclictest3286-21runrttasks09:50:071
772899267,15cyclictest0-21swapper/108:45:131
772799269,15cyclictest0-21swapper/008:29:500
772799267,5cyclictest40250irq/92-i91510:10:220
772799264,19cyclictest15034-21ntpdc07:40:250
772799264,19cyclictest15034-21ntpdc07:40:250
772799261,13cyclictest4873-21cat08:40:130
7727992610,12cyclictest20965-21taskset10:49:050
252592261,5sleep10-21swapper/108:07:181
116072261,4sleep10-21swapper/108:56:041
772899259,12cyclictest0-21swapper/112:00:291
772899252,11cyclictest22771-21ntpq08:00:261
772799257,5cyclictest2225-21dbus-daemon08:52:030
772799252,18cyclictest17278-21cron10:40:000
772899241,19cyclictest0-21swapper/112:30:211
772799241,12cyclictest0-21swapper/008:05:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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