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2026-09-23 - 22:17

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 Wed Sep 23, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
219199912491214,17cyclictest19488-21smartctl10:05:250
219209912051173,28cyclictest22294-21cstates07:25:121
219199911911151,36cyclictest22352-21df_inode07:25:140
217162562517,31sleep00-21swapper/007:23:260
207572508463,29sleep10-21swapper/107:20:201
2192099134125,6cyclictest0-21swapper/110:05:261
294362600,9sleep02191999cyclictest07:40:270
274532590,8sleep02191999cyclictest07:35:250
19402560,4sleep041ktimersoftd/009:20:180
2191999481,14cyclictest26536-21processes11:50:300
2191999480,18cyclictest41ktimersoftd/010:38:140
2191999440,14cyclictest5999-21taskset12:21:490
2191999422,8cyclictest0-21swapper/007:34:560
16132421,4sleep11620-21latency_hist07:55:011
2191999418,5cyclictest6140-21ntpq09:30:270
2191999413,11cyclictest0-21swapper/010:40:140
2191999411,9cyclictest0-21swapper/008:00:000
93102400,8sleep02191999cyclictest11:05:200
2191999406,6cyclictest3-21ksoftirqd/012:25:170
2191999403,11cyclictest0-21swapper/011:16:200
2191999403,11cyclictest0-21swapper/011:16:200
2191999403,11cyclictest0-21swapper/009:11:230
2191999402,12cyclictest0-21swapper/012:00:300
2191999401,9cyclictest0-21swapper/012:39:510
2191999401,9cyclictest0-21swapper/011:30:250
2191999401,9cyclictest0-21swapper/011:20:170
2191999401,9cyclictest0-21swapper/011:10:200
2191999401,9cyclictest0-21swapper/011:00:220
2191999401,9cyclictest0-21swapper/010:50:210
2191999401,9cyclictest0-21swapper/010:15:220
2191999401,9cyclictest0-21swapper/008:20:170
2191999401,8cyclictest0-21swapper/012:49:020
2191999401,8cyclictest0-21swapper/012:49:010
2191999401,8cyclictest0-21swapper/010:10:260
2191999401,8cyclictest0-21swapper/008:59:590
2191999401,8cyclictest0-21swapper/007:46:440
2191999398,5cyclictest19337-21smartctl08:40:180
2191999397,6cyclictest4620-21ntpq08:00:220
2191999397,6cyclictest17897-21mailstats08:35:270
2191999396,5cyclictest28390-21smartctl10:30:220
2191999396,13cyclictest6303-21latency08:05:230
2191999393,10cyclictest0-21swapper/012:53:540
2191999391,9cyclictest0-21swapper/011:35:110
2191999391,8cyclictest0-21swapper/011:40:340
2191999381,8cyclictest0-21swapper/011:45:260
2191999381,8cyclictest0-21swapper/010:00:140
2191999381,8cyclictest0-21swapper/008:30:290
2191999377,6cyclictest3-21ksoftirqd/009:42:590
2191999377,5cyclictest32495-21smartctl09:15:180
2191999371,8cyclictest0-21swapper/008:16:400
21919993714,4cyclictest3-21ksoftirqd/012:05:230
21919993712,14cyclictest5763-21ntp_offset10:55:250
2192099362,12cyclictest226652aten_r4power_po08:50:121
21920993612,21cyclictest22440-21awk08:50:011
2191999366,6cyclictest3-21ksoftirqd/009:53:000
2191999365,15cyclictest2225-21dbus-daemon09:01:380
2192099359,14cyclictest81rcu_preempt11:20:111
2191999358,5cyclictest13690-21smartctl08:25:170
2191999357,5cyclictest9369-21smartctl12:30:320
2191999357,5cyclictest25152-21smartctl10:20:290
2191999351,8cyclictest0-21swapper/011:58:360
2191999351,8cyclictest0-21swapper/010:45:130
2191999351,8cyclictest0-21swapper/009:07:380
2191999351,8cyclictest0-21swapper/007:54:240
139052351,30sleep114057-21head09:50:321
21920993412,7cyclictest32455-21grep12:05:271
2192099341,13cyclictest0-21swapper/110:46:091
2191999346,6cyclictest3-21ksoftirqd/008:48:590
2191999346,6cyclictest3-21ksoftirqd/008:13:010
2191999344,6cyclictest3-21ksoftirqd/009:55:120
2191999341,9cyclictest0-21swapper/009:47:570
2191999341,8cyclictest0-21swapper/012:15:120
302422331,4sleep130246-21ntp_states12:00:271
2192099331,13cyclictest0-21swapper/109:23:551
21920993310,9cyclictest81rcu_preempt12:40:161
2191999337,5cyclictest4444-21smartctl09:25:270
2191999336,5cyclictest16738-21smartctl11:25:170
2191999336,5cyclictest1208-21smartctl12:10:210
2191999335,5cyclictest23093-21smartctl08:50:180
2191999331,8cyclictest0-21swapper/010:25:130
167802331,4sleep116827-21iostat11:25:181
66212321,9sleep10-21swapper/110:59:451
2192099324,5cyclictest81rcu_preempt11:19:021
2192099324,5cyclictest81rcu_preempt11:19:011
89492311,4sleep18953-21irqstats12:30:241
84922311,5sleep10-21swapper/111:04:291
2192099316,5cyclictest81rcu_preempt08:30:251
2192099311,4cyclictest81rcu_preempt08:39:041
2192099311,16cyclictest14138-21sendmail_mailqu08:25:261
2191999311,8cyclictest0-21swapper/012:41:000
101192311,4sleep10-21swapper/111:06:541
91142301,5sleep10-21swapper/108:13:381
2192099305,4cyclictest81rcu_preempt08:40:501
21920993022,5cyclictest20960-21kernelversion10:10:231
2192099301,4cyclictest81rcu_preempt09:35:281
2192099301,16cyclictest22726-21smartctl10:15:171
2192099301,14cyclictest0-21swapper/111:40:141
21920993010,6cyclictest29594-21cron10:34:591
2191999301,8cyclictest0-21swapper/009:36:280
7632291,4sleep181rcu_preempt12:10:161
51002291,5sleep10-21swapper/109:29:391
35532291,5sleep10-21swapper/107:59:301
271232291,4sleep10-21swapper/111:52:411
2192099297,5cyclictest40250irq/92-i91509:55:121
2192099291,4cyclictest81rcu_preempt12:47:541
2192099291,4cyclictest81rcu_preempt12:47:541
2192099291,4cyclictest81rcu_preempt11:30:051
2192099291,4cyclictest81rcu_preempt08:09:101
2192099291,4cyclictest81rcu_preempt07:43:221
2192099291,14cyclictest9367-21diskstats09:40:151
2192099291,14cyclictest26430-21aten_r4power_po09:00:111
121822291,5sleep10-21swapper/111:13:491
108642291,5sleep10-21swapper/108:17:181
61782281,5sleep10-21swapper/112:23:431
39952281,5sleep10-21swapper/112:15:451
316672281,5sleep10-21swapper/109:13:181
311442281,4sleep10-21swapper/110:36:401
260002281,5sleep10-21swapper/107:31:461
259622281,5sleep10-21swapper/108:57:481
254282281,5sleep10-21swapper/110:20:441
2192099286,10cyclictest28404-21cpuspeed_turbos09:05:131
2192099283,3cyclictest81rcu_preempt08:02:461
2192099283,12cyclictest0-21swapper/112:25:581
2192099282,12cyclictest0-21swapper/112:35:151
2192099281,4cyclictest81rcu_preempt11:56:271
2192099281,4cyclictest81rcu_preempt10:53:111
2192099281,4cyclictest81rcu_preempt10:30:011
21920992811,5cyclictest2225-21dbus-daemon08:24:001
126222281,5sleep10-21swapper/109:49:381
2192099276,4cyclictest81rcu_preempt12:51:431
2192099271,13cyclictest30292-21/usr/sbin/munin07:45:301
2192099271,13cyclictest20286-21diskstats11:35:151
2192099266,16cyclictest0-21swapper/110:00:281
2192099261,11cyclictest5787-21tune2fs09:30:191
21920992517,5cyclictest22-21ksoftirqd/111:48:021
2192099242,16cyclictest359-21ntp_states09:15:251
2192099241,8cyclictest26832-21fschecks_count07:35:161
21920992416,5cyclictest22-21ksoftirqd/110:40:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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