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2026-04-27 - 17:40

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 376 highest latencies:
System rack9slot4s (updated Mon Apr 27, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
218119911481139,6cyclictest0-21swapper/110:15:161
218119911251097,25cyclictest0-21swapper/107:25:121
214862563517,31sleep00-21swapper/007:22:100
214362563518,31sleep10-21swapper/107:21:401
2181099259225,5cyclictest0-21swapper/007:25:120
68272940,8sleep02181099cyclictest09:56:110
21810998561,6cyclictest22969-21perl10:15:160
2181099632,11cyclictest0-21swapper/010:10:010
308882570,23sleep03-21ksoftirqd/012:15:210
2181099539,11cyclictest23800-21sh11:30:180
2181099521,21cyclictest20491-21ssh12:03:480
308062510,3sleep10-21swapper/109:10:201
195092510,8sleep02181099cyclictest09:34:530
63682470,8sleep00-21swapper/009:19:560
261062460,8sleep02181099cyclictest07:34:000
16682460,8sleep02181099cyclictest09:50:280
41662420,4sleep041ktimersoftd/011:07:410
183612421,7sleep118371-21ssh11:24:341
183612421,7sleep118371-21ssh11:24:331
2181199404,3cyclictest81rcu_preempt12:41:491
155742401,35sleep115584-21ssh11:57:551
21810993912,6cyclictest8077-21perl10:35:160
277872372,31sleep127885-21sh10:20:251
2181199368,5cyclictest81rcu_preempt10:35:091
2181099369,13cyclictest31567-21users09:10:320
2181199355,4cyclictest81rcu_preempt12:23:041
2181199351,20cyclictest5016-21ssh11:09:091
2181199351,15cyclictest0-21swapper/110:12:351
2181099357,5cyclictest24825-21memory12:45:220
2181099351,11cyclictest81rcu_preempt11:55:390
322112341,4sleep132221-21ssh09:49:111
257082341,4sleep125753-21/usr/sbin/munin07:30:281
2181199348,6cyclictest0-21swapper/110:25:461
2181199348,22cyclictest0-21swapper/112:52:041
21811993415,15cyclictest22-21ksoftirqd/109:35:331
21810993411,4cyclictest0-21swapper/011:43:440
189272341,27sleep019059-21cpu11:25:120
250622332,5sleep125131-21ssh09:40:241
2181199336,4cyclictest81rcu_preempt11:52:411
2181199335,4cyclictest81rcu_preempt10:32:111
2181199332,4cyclictest81rcu_preempt11:48:401
2181199332,19cyclictest0-21swapper/109:30:241
2181099339,6cyclictest2225-21dbus-daemon08:04:030
2181199328,20cyclictest0-21swapper/112:06:461
2181199326,22cyclictest0-21swapper/112:19:121
2181199324,4cyclictest81rcu_preempt09:52:291
2181199323,10cyclictest29158-21munin-run11:00:001
21811993222,6cyclictest29386-21ssh12:14:071
2181199322,16cyclictest17550-21ssh10:09:321
2181199321,8cyclictest24764-21fschecks_count08:55:161
2181199321,17cyclictest16948-21iostat10:45:191
2181099323,15cyclictest16047-21memory12:35:200
2181099322,14cyclictest10799-21users10:00:300
21810993210,8cyclictest3286-21runrttasks08:09:030
2181199319,19cyclictest0-21swapper/112:25:461
2181199319,13cyclictest22-21ksoftirqd/111:25:051
2181199316,4cyclictest81rcu_preempt08:05:391
2181199313,4cyclictest81rcu_preempt08:29:471
2181199311,26cyclictest0-21swapper/109:19:541
2181099316,11cyclictest81rcu_preempt09:37:500
2181099313,4cyclictest81rcu_preempt09:25:590
2181099313,14cyclictest0-21swapper/011:10:140
2181099311,8cyclictest16692-21ssh11:21:440
2181099311,8cyclictest16692-21ssh11:21:440
2181099311,4cyclictest81rcu_preempt12:12:380
21810993113,6cyclictest29365-21/usr/sbin/munin09:05:290
21810993112,6cyclictest30185-21ssh11:37:270
2181099311,13cyclictest22431-21taskset10:51:030
132672311,3sleep11133-21kworker/1:110:04:421
119092310,8sleep02181099cyclictest12:30:260
2181199307,5cyclictest22-21ksoftirqd/109:58:441
2181199307,19cyclictest0-21swapper/111:31:331
2181199302,16cyclictest0-21swapper/110:44:031
2181199302,16cyclictest0-21swapper/110:44:031
2181199302,15cyclictest3462-21sh11:44:351
2181199302,14cyclictest0-21swapper/112:45:231
21811993012,14cyclictest0-21swapper/111:12:491
2181199301,18cyclictest14587-21ssh12:34:161
2181099309,7cyclictest19968-21ssh10:49:150
2181099309,6cyclictest12149-21ssh11:54:290
2181099308,5cyclictest32031-21ssh09:48:520
2181099301,4cyclictest81rcu_preempt08:14:330
21810993012,5cyclictest9919-21taskset08:15:200
21810993012,5cyclictest3286-21runrttasks12:26:450
21810993011,6cyclictest27469-21unixbench_multi09:00:290
21810993011,6cyclictest26594-21sshd10:55:420
207622301,5sleep00-21swapper/010:12:360
180232301,5sleep10-21swapper/112:37:431
302042291,5sleep00-21swapper/012:51:070
284372291,5sleep00-21swapper/010:20:500
224652291,5sleep10-21swapper/110:51:071
2181199299,16cyclictest0-21swapper/111:17:151
2181199299,16cyclictest0-21swapper/111:00:411
2181199291,5cyclictest22-21ksoftirqd/108:34:081
2181199291,4cyclictest81rcu_preempt09:21:151
2181199291,4cyclictest81rcu_preempt09:05:281
2181199291,15cyclictest19034-21df08:40:141
2181099298,7cyclictest31489-21df10:25:140
2181099297,12cyclictest15034-21aten_r4power_en08:30:120
2181099292,14cyclictest14090-21ssh11:19:430
2181099292,14cyclictest0-21swapper/009:21:160
21810992919,6cyclictest20302-21cat12:40:190
21810992911,5cyclictest3725-21perl10:30:160
21810992911,5cyclictest29423-21/usr/sbin/munin11:00:110
21810992911,5cyclictest24567-21/usr/sbin/munin09:40:160
2181099290,4cyclictest81rcu_preempt07:58:180
53252281,5sleep10-21swapper/108:04:061
317292281,5sleep00-21swapper/007:46:060
300502281,5sleep10-21swapper/107:43:111
278502281,5sleep10-21swapper/109:03:341
2181199289,15cyclictest0-21swapper/112:03:521
2181199284,15cyclictest0-21swapper/108:36:391
2181199283,5cyclictest3286-21runrttasks08:52:581
21811992820,5cyclictest28776-21/usr/sbin/munin11:35:301
21811992814,8cyclictest11775-21iostat_ios09:25:211
2181099289,5cyclictest17142-21df_inode08:35:130
2181099284,9cyclictest19050-21diskstats08:40:160
2181099284,13cyclictest0-21swapper/012:24:560
2181099282,12cyclictest4644-21sh11:45:200
21810992812,5cyclictest32564-21diskstats07:50:140
2181099281,15cyclictest21775-21diskstats12:05:140
21810992810,5cyclictest11891-21ssh10:40:070
21810992810,5cyclictest11891-21ssh10:40:070
2181099280,4cyclictest81rcu_preempt08:26:590
109652281,5sleep10-21swapper/108:19:141
2181199275,4cyclictest81rcu_preempt08:13:101
2181199271,4cyclictest81rcu_preempt07:56:171
2181099272,14cyclictest0-21swapper/008:57:260
2181099272,12cyclictest27090-21/usr/sbin/munin07:35:210
21810992711,12cyclictest11425-21cpuspeed_turbos08:20:120
206192271,5sleep10-21swapper/108:45:081
125682271,4sleep10-21swapper/108:21:071
2181199264,13cyclictest0-21swapper/107:39:181
2181199261,8cyclictest32377-21wget07:50:121
2181099269,5cyclictest22800-21df_inode08:50:150
2181099269,5cyclictest20922-21/usr/sbin/munin08:45:150
2181199253,13cyclictest0-21swapper/107:45:011
2181099252,11cyclictest0-21swapper/007:40:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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