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2026-06-27 - 17:51

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 Jun 27, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
90179911021093,6cyclictest0-21swapper/107:26:431
90179910891068,17cyclictest6413-21sh10:05:241
72542656580,61sleep00-21swapper/007:20:090
87162641595,30sleep10-21swapper/107:22:251
901699141131,7cyclictest0-21swapper/007:26:430
901699127105,16cyclictest0-21swapper/010:05:250
82221100,6sleep1901799cyclictest12:45:011
214492590,4sleep00-21swapper/010:45:250
901799574,19cyclictest3996-21diskstats10:00:151
901799573,19cyclictest2679-21iostat_ios08:30:211
901799563,7cyclictest12303-21iostat_ios07:30:201
901799563,18cyclictest3607-21iostat_ios12:50:211
901799551,12cyclictest18594-21cut12:05:131
901799533,7cyclictest30571-21munin-run08:20:001
9017995317,6cyclictest24805-21taskset09:30:111
901799519,7cyclictest2221-21cron08:15:011
901799482,6cyclictest0-21swapper/112:10:121
901799482,4cyclictest0-21swapper/109:48:281
26702460,6sleep1901799cyclictest12:49:001
9017994512,11cyclictest21359-21fschecks_count09:20:161
901799451,14cyclictest4898-21sshd11:28:251
901799441,7cyclictest9483-21hddtemp_smartct11:40:171
901799441,4cyclictest81rcu_preempt07:53:281
901799439,8cyclictest20344-21unixbench_singl09:15:291
901799432,8cyclictest29421-21users11:05:311
901799432,7cyclictest2695-21snmpd08:38:131
901799421,9cyclictest1173-21awk11:20:001
901799411,7cyclictest6047-21ntp_states11:30:261
901799401,8cyclictest9166-21cron10:15:001
901699407,6cyclictest20458-21cpuspeed_turbos12:10:120
901799391,8cyclictest24948-21pidof08:05:001
901799381,7cyclictest11321-21taskset08:54:101
901699383,22cyclictest9931-21irqstats10:15:200
9016993624,7cyclictest12874-21/usr/sbin/munin07:30:280
901699354,16cyclictest11867-21diskstats08:55:140
118902350,6sleep1901799cyclictest10:20:201
901699347,14cyclictest0-21swapper/009:05:380
901699346,13cyclictest30691-21python12:35:290
9016993314,17cyclictest0-21swapper/009:54:230
71192330,14sleep0111rcuc/008:40:290
258822331,9sleep00-21swapper/010:57:490
901699324,15cyclictest0-21swapper/008:10:260
9016993221,6cyclictest15010-21wget10:30:110
9016993213,6cyclictest5501-21df11:30:140
9016993212,7cyclictest17149-21df_inode10:35:140
901699321,13cyclictest0-21swapper/010:41:180
76352321,27sleep07685-21iostat11:35:200
233272321,4sleep023342-21ntp_states10:50:250
901699317,12cyclictest18979-21taskset07:46:460
9016993121,5cyclictest30336-21taskset11:10:160
9016993111,6cyclictest316402cut12:40:110
9016993111,5cyclictest0-21swapper/009:10:180
15642311,5sleep10-21swapper/108:26:421
901799307,5cyclictest81rcu_preempt12:40:011
901799305,4cyclictest81rcu_preempt10:29:231
901799304,6cyclictest3286-21runrttasks09:06:431
901699302,17cyclictest0-21swapper/011:56:140
901699302,15cyclictest3286-21runrttasks11:04:160
901699301,24cyclictest13753-21grep11:50:260
901699301,20cyclictest0-21swapper/008:35:320
901799295,4cyclictest81rcu_preempt07:43:521
901799292,7cyclictest0-21swapper/109:38:251
9017992921,5cyclictest2221-21cron08:50:001
901799291,4cyclictest81rcu_preempt10:40:311
9017992914,5cyclictest22-21ksoftirqd/111:58:181
9017992914,5cyclictest22-21ksoftirqd/110:15:311
901699299,4cyclictest0-21swapper/008:20:290
901699297,12cyclictest40250irq/92-i91509:40:130
901699293,18cyclictest0-21swapper/012:50:100
901699293,18cyclictest0-21swapper/009:38:470
901699293,18cyclictest0-21swapper/008:34:490
901699292,14cyclictest26219-21diskstats12:25:160
901699292,14cyclictest2052-21memory11:20:230
901699292,13cyclictest2739-21python09:55:270
9016992913,12cyclictest24121-21grep09:25:310
9016992911,5cyclictest4829-21taskset10:00:280
901699291,15cyclictest29865-21python08:15:280
9016992911,13cyclictest13184-21cut10:25:130
9016992910,6cyclictest27802-21/usr/sbin/munin12:30:280
77972291,5sleep00-21swapper/008:45:030
267412291,5sleep00-21swapper/008:09:180
196912291,5sleep00-21swapper/012:05:390
181072291,5sleep00-21swapper/012:03:420
9372281,5sleep00-21swapper/011:17:440
901799287,4cyclictest81rcu_preempt07:45:111
901799285,4cyclictest81rcu_preempt09:02:591
901799284,4cyclictest81rcu_preempt12:03:161
901799283,4cyclictest81rcu_preempt07:38:151
901799281,4cyclictest81rcu_preempt08:07:491
901699289,7cyclictest24459-21tune2fs12:20:150
901699289,7cyclictest14819-21grep07:35:300
901699289,6cyclictest13833-21fschecks_count09:00:160
901699284,9cyclictest3638-21diskstats11:25:170
901699283,16cyclictest0-21swapper/011:44:030
9016992817,7cyclictest12112-21ps10:20:240
9016992817,6cyclictest19671-21cpuspeed_turbos07:50:120
901699281,4cyclictest81rcu_preempt08:50:240
901699281,14cyclictest24973-21cstates09:30:110
88742281,5sleep00-21swapper/010:12:010
297422281,5sleep00-21swapper/011:08:450
245322281,5sleep00-21swapper/008:00:490
23662281,5sleep00-21swapper/012:46:010
226662281,5sleep00-21swapper/007:56:070
218672281,23sleep021958-21sendmail_mailst09:20:270
207242281,5sleep00-21swapper/009:19:050
169792281,5sleep00-21swapper/007:42:260
16812281,5sleep00-21swapper/008:27:560
901799276,4cyclictest81rcu_preempt10:38:441
901799275,4cyclictest81rcu_preempt09:25:171
901799273,8cyclictest17518-21df_inode09:10:151
9017992712,5cyclictest22-21ksoftirqd/111:47:361
9017992712,4cyclictest40250irq/92-i91511:11:261
9017992712,11cyclictest0-21swapper/108:20:231
9017992711,5cyclictest22-21ksoftirqd/107:58:261
901699271,4cyclictest81rcu_preempt11:49:460
901699271,15cyclictest0-21swapper/012:17:120
9016992711,4cyclictest3286-21runrttasks09:47:550
237312271,5sleep10-21swapper/112:18:391
901799266,7cyclictest0-21swapper/110:50:281
901799265,4cyclictest81rcu_preempt11:00:471
901799265,4cyclictest81rcu_preempt09:40:071
901799263,3cyclictest81rcu_preempt08:41:261
901799262,8cyclictest11867-21diskstats08:55:141
901799262,20cyclictest0-21swapper/110:30:221
9017992611,5cyclictest22-21ksoftirqd/111:22:171
9017992610,13cyclictest7469-21grep11:35:151
901799259,5cyclictest40250irq/92-i91511:50:191
901799258,5cyclictest81rcu_preempt09:55:001
901799254,4cyclictest81rcu_preempt12:26:531
901799252,9cyclictest0-21swapper/110:55:231
901799251,4cyclictest81rcu_preempt12:30:041
9017992510,4cyclictest40250irq/92-i91509:58:301
9017992510,11cyclictest24733-21missed_timers12:20:211
9017992415,5cyclictest21776-21wc10:45:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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