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2026-01-05 - 02:42

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 792 highest latencies:
System rack9slot4s (updated Sun Jan 04, 2026 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
145119912111175,15cyclictest14677-21wget07:25:100
145129911041095,6cyclictest0-21swapper/107:25:091
145129910591028,25cyclictest18946-21apt-get07:35:011
141612544499,30sleep10-21swapper/107:22:011
143482535490,29sleep00-21swapper/007:23:590
1393221170,8sleep01451199cyclictest12:20:190
942821020,8sleep01451199cyclictest12:50:150
220832660,8sleep11451299cyclictest12:29:091
326522520,8sleep01451199cyclictest09:53:080
167022500,8sleep01451199cyclictest10:43:180
283532460,5sleep01451199cyclictest12:35:170
211562460,7sleep01451199cyclictest11:20:310
14512994311,28cyclictest0-21swapper/109:46:551
14511994322,8cyclictest3-21ksoftirqd/012:10:240
14511994322,6cyclictest3-21ksoftirqd/012:15:330
14511994218,9cyclictest3-21ksoftirqd/011:37:080
1451199411,8cyclictest3302-21runrttasks09:56:530
1451199411,8cyclictest3302-21runrttasks09:56:530
14512994010,6cyclictest45682rm11:37:051
235522380,4sleep0111rcuc/010:50:170
173352381,4sleep117349-21ssh09:37:051
1451199388,19cyclictest0-21swapper/010:25:260
14511993821,6cyclictest3-21ksoftirqd/011:03:370
1451199381,4cyclictest81rcu_preempt09:13:350
14512993727,6cyclictest23353-21diskstats10:50:161
14511993722,5cyclictest3-21ksoftirqd/011:05:130
1451199372,18cyclictest0-21swapper/009:20:230
215252360,7sleep00-21swapper/009:41:060
14512993627,6cyclictest0-21swapper/108:07:551
1451199362,5cyclictest0-21swapper/010:07:160
14511993619,6cyclictest3-21ksoftirqd/011:31:200
1451199361,31cyclictest2309-21cron09:30:000
93652351,4sleep19400-21ntp_states12:15:291
1451299355,5cyclictest81rcu_preempt09:20:221
14512993513,12cyclictest22-21ksoftirqd/111:56:071
14511993520,5cyclictest3-21ksoftirqd/012:04:180
14511993520,5cyclictest3-21ksoftirqd/011:53:400
14511993520,5cyclictest3-21ksoftirqd/009:48:180
14511993519,5cyclictest3-21ksoftirqd/012:28:190
14511993519,5cyclictest3-21ksoftirqd/011:58:320
14511993519,5cyclictest3-21ksoftirqd/009:30:210
14511993518,5cyclictest3-21ksoftirqd/010:11:450
1451199351,5cyclictest12025-21ssh10:38:350
1451199351,5cyclictest12025-21ssh10:38:350
14511993513,5cyclictest3-21ksoftirqd/010:55:010
1451199351,22cyclictest6795-21runrttasks12:46:170
74102341,10sleep10-21swapper/108:29:151
1451299344,5cyclictest81rcu_preempt10:46:221
1451299343,28cyclictest0-21swapper/108:04:161
1451299342,7cyclictest0-21swapper/109:10:151
14512993423,7cyclictest20788-21ssh09:40:291
1451299342,29cyclictest0-21swapper/110:36:161
1451299342,29cyclictest0-21swapper/110:36:151
1451299341,28cyclictest22653-21latency_hist09:10:011
14511993427,5cyclictest0-21swapper/008:20:360
1451199342,28cyclictest18551-21ssh11:18:370
14511993419,4cyclictest3-21ksoftirqd/011:47:430
14511993419,4cyclictest3-21ksoftirqd/011:47:420
1451199341,20cyclictest26169-21rm12:33:020
14511993411,8cyclictest81rcu_preempt12:07:140
52542331,4sleep15268-21ssh12:10:521
230402331,5sleep10-21swapper/111:23:031
1451299335,24cyclictest0-21swapper/110:44:561
1451299334,26cyclictest8166-21kworker/u4:212:42:591
1451299333,5cyclictest0-21swapper/107:48:561
1451299333,27cyclictest0-21swapper/109:15:361
14512993326,5cyclictest0-21swapper/112:08:551
14512993316,14cyclictest22-21ksoftirqd/112:35:591
1451299331,4cyclictest81rcu_preempt09:33:401
1451299331,4cyclictest26631-21/usr/sbin/munin07:55:161
1451299331,28cyclictest2403-21irqbalance12:01:361
1451199332,4cyclictest0-21swapper/009:36:350
14511993318,5cyclictest3-21ksoftirqd/010:31:380
14511993318,5cyclictest3-21ksoftirqd/010:01:390
14511993316,6cyclictest3-21ksoftirqd/011:43:020
14511993316,5cyclictest3-21ksoftirqd/009:05:360
14511993311,9cyclictest19112-21/usr/sbin/munin07:35:230
50042321,27sleep15161-21cpuspeed_turbos12:45:141
3572321,5sleep10-21swapper/109:53:241
277182321,27sleep027729-21sh11:27:500
1451299328,13cyclictest40550irq/92-i91511:05:141
1451299325,4cyclictest81rcu_preempt10:12:401
1451299324,4cyclictest81rcu_preempt12:33:011
1451299324,4cyclictest81rcu_preempt10:31:011
1451299324,4cyclictest81rcu_preempt10:03:041
1451299323,4cyclictest81rcu_preempt10:59:081
1451299323,27cyclictest0-21swapper/109:55:361
1451299323,27cyclictest0-21swapper/109:55:351
1451299321,29cyclictest0-21swapper/108:39:161
1451199328,11cyclictest27747-21aten_r4power_po09:15:120
1451199327,12cyclictest0-21swapper/008:15:520
1451199325,4cyclictest81rcu_preempt10:24:510
1451199322,5cyclictest0-21swapper/012:44:360
14511993217,4cyclictest3-21ksoftirqd/010:49:380
14511993216,5cyclictest3-21ksoftirqd/008:51:510
14511993216,5cyclictest3-21ksoftirqd/008:51:510
14511993214,6cyclictest25895-21cron10:20:000
1451199321,29cyclictest0-21swapper/008:28:360
14511993210,8cyclictest0-21swapper/011:13:390
139002321,27sleep113929-21sh12:20:191
49802311,5sleep10-21swapper/109:25:041
180012311,3sleep018019-21ntp_states07:30:240
1451299318,12cyclictest40550irq/92-i91510:20:261
1451299315,4cyclictest81rcu_preempt11:50:581
1451299314,5cyclictest81rcu_preempt11:10:211
1451299314,4cyclictest81rcu_preempt11:03:441
1451299313,4cyclictest81rcu_preempt11:18:201
14512993124,5cyclictest0-21swapper/111:42:161
14512993123,6cyclictest0-21swapper/111:25:361
14511993116,5cyclictest3-21ksoftirqd/008:44:050
14511993111,6cyclictest3-21ksoftirqd/008:02:010
136762311,5sleep10-21swapper/110:06:231
1451299305,4cyclictest81rcu_preempt07:42:021
1451299301,27cyclictest0-21swapper/108:24:551
1451299301,27cyclictest0-21swapper/108:14:161
1451199303,14cyclictest0-21swapper/007:53:290
1451199301,5cyclictest0-21swapper/008:08:160
14511993012,5cyclictest9526-21/usr/sbin/munin08:35:260
14511993011,6cyclictest8481-21ntp_states08:30:240
14511993010,5cyclictest3302-21runrttasks09:02:180
90402291,3sleep10-21swapper/112:50:111
184422291,5sleep00-21swapper/008:56:390
1451299294,4cyclictest81rcu_preempt07:52:461
1451299293,4cyclictest81rcu_preempt08:48:211
1451299292,23cyclictest22131-21memory10:15:231
1451299291,26cyclictest0-21swapper/110:28:561
14511992912,5cyclictest604-21irqstats08:10:200
14511992911,6cyclictest21241-21cstates07:40:130
1451199291,15cyclictest14152-21/usr/sbin/munin08:45:270
11702291,5sleep10-21swapper/111:34:221
1451299289,15cyclictest30497-21gdbus09:03:521
1451299284,4cyclictest81rcu_preempt08:41:301
1451299281,4cyclictest81rcu_preempt11:46:191
1451299281,4cyclictest81rcu_preempt11:46:181
89812271,5sleep10-21swapper/108:31:031
14512992720,5cyclictest0-21swapper/108:50:361
14512992720,5cyclictest0-21swapper/108:50:361
14512992710,5cyclictest40550irq/92-i91507:35:021
1451199272,12cyclictest23711-21ntp_states07:45:250
1451299259,5cyclictest40550irq/92-i91508:15:321
14512992517,4cyclictest18000-21sendmail_mailqu08:55:261
1451199251,12cyclictest27647-21sh07:55:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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