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2026-09-10 - 17:18

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 Thu Sep 10, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
152339911661146,17cyclictest23833-21strings10:35:241
152329911221093,26cyclictest0-21swapper/007:25:090
148472734689,29sleep10-21swapper/107:21:321
147682564518,31sleep00-21swapper/007:20:420
1523399133123,7cyclictest0-21swapper/107:25:091
1523299131121,7cyclictest0-21swapper/010:35:230
46202790,4sleep1211ktimersoftd/108:20:101
15232994123,6cyclictest3-21ksoftirqd/009:25:280
15232993922,6cyclictest3-21ksoftirqd/009:19:300
15232993921,6cyclictest3-21ksoftirqd/008:14:150
15232993915,8cyclictest3-21ksoftirqd/007:50:010
37562381,33sleep02401-21NetworkManager09:41:260
15232993721,5cyclictest3-21ksoftirqd/010:27:580
15232993710,16cyclictest8463-21/usr/sbin/munin11:20:220
67922361,5sleep16866-21sort11:15:281
67922361,5sleep16866-21sort11:15:281
15232993619,6cyclictest3-21ksoftirqd/008:47:510
256312355,26sleep125772-21unixbench_multi12:05:291
15232993520,5cyclictest3-21ksoftirqd/010:59:260
15232993519,6cyclictest3-21ksoftirqd/008:43:090
15232993519,5cyclictest3-21ksoftirqd/010:11:520
15232993519,5cyclictest3-21ksoftirqd/009:38:320
15232993518,5cyclictest3-21ksoftirqd/008:51:390
15232993513,11cyclictest3-21ksoftirqd/010:40:350
1523399346,4cyclictest81rcu_preempt07:46:291
1523299343,16cyclictest1297-21users11:00:290
15232993418,6cyclictest3-21ksoftirqd/011:36:460
15232993417,6cyclictest3-21ksoftirqd/009:10:270
15232993415,5cyclictest3-21ksoftirqd/012:04:510
1523299341,20cyclictest32145-21sshd08:05:240
1523299341,18cyclictest0-21swapper/011:58:440
1523399331,7cyclictest3286-21runrttasks11:10:471
1523299337,12cyclictest2225-21dbus-daemon10:33:470
1523299334,16cyclictest0-21swapper/008:34:370
15232993318,5cyclictest3-21ksoftirqd/012:53:010
15232993317,6cyclictest3-21ksoftirqd/008:20:470
15232993316,6cyclictest3-21ksoftirqd/007:55:510
1523299331,18cyclictest11982-21sendmail08:40:000
314482321,4sleep031465-21wget09:30:160
1523399324,25cyclictest0-21swapper/108:47:271
15233993210,8cyclictest31087-21ntp_states12:20:241
1523299326,15cyclictest0-21swapper/011:19:320
1523299326,15cyclictest0-21swapper/011:19:320
15232993223,5cyclictest30207-21latency_hist12:20:010
1523299322,15cyclictest4556-21python12:35:280
15232993217,5cyclictest3-21ksoftirqd/011:46:300
15232993217,4cyclictest3-21ksoftirqd/012:26:450
15232993215,6cyclictest3-21ksoftirqd/009:53:460
15232993210,10cyclictest0-21swapper/011:40:260
1523399315,4cyclictest81rcu_preempt12:41:031
1523399315,4cyclictest81rcu_preempt12:41:031
1523399315,4cyclictest81rcu_preempt09:03:041
1523399312,4cyclictest0-21swapper/109:25:201
15233993110,6cyclictest22919-21ls10:35:001
15232993117,4cyclictest3-21ksoftirqd/012:41:390
15232993117,4cyclictest3-21ksoftirqd/012:41:390
15232993116,5cyclictest3-21ksoftirqd/011:54:210
15232993116,5cyclictest3-21ksoftirqd/008:15:060
15232993116,4cyclictest3-21ksoftirqd/009:04:050
76762301,5sleep10-21swapper/109:53:151
280842301,5sleep00-21swapper/012:13:550
27352301,26sleep12773-21ntp_states11:05:231
174182301,5sleep10-21swapper/108:53:001
155422301,5sleep10-21swapper/110:15:101
1523399305,4cyclictest81rcu_preempt07:51:101
1523399301,7cyclictest81rcu_preempt08:00:021
1523399301,4cyclictest81rcu_preempt11:27:331
1523299309,8cyclictest2225-21dbus-daemon09:22:170
1523299306,13cyclictest3-21ksoftirqd/010:15:280
15232993016,4cyclictest3-21ksoftirqd/007:42:210
15232993015,5cyclictest3-21ksoftirqd/010:50:000
15232993014,5cyclictest3-21ksoftirqd/008:02:540
124392301,4sleep112444-21diskstats08:40:151
119382301,5sleep10-21swapper/108:39:471
90632291,5sleep10-21swapper/111:21:391
81322291,5sleep10-21swapper/108:29:151
318732291,5sleep00-21swapper/012:24:020
261592291,5sleep00-21swapper/012:08:210
20252291,5sleep10-21swapper/109:39:161
193072291,5sleep00-21swapper/007:31:420
1523399296,4cyclictest81rcu_preempt10:01:421
1523399295,4cyclictest81rcu_preempt11:55:011
1523399294,4cyclictest81rcu_preempt11:36:231
1523399294,3cyclictest81rcu_preempt07:30:231
1523399293,4cyclictest81rcu_preempt07:37:031
1523399293,19cyclictest31916-21iostat_ios08:05:201
15233992921,5cyclictest20835-21sshd11:55:091
1523399291,7cyclictest2049-21perl12:30:161
1523299297,5cyclictest0-21swapper/008:58:590
1523299295,13cyclictest40250irq/92-i91510:20:210
1523299293,19cyclictest29739-21python10:50:260
1523299292,15cyclictest0-21swapper/007:52:410
15232992915,4cyclictest3-21ksoftirqd/009:45:560
15232992914,5cyclictest3-21ksoftirqd/011:11:450
15232992914,5cyclictest3-21ksoftirqd/008:27:260
1523299291,24cyclictest8606-21users12:45:300
1523299291,14cyclictest12930-21/usr/sbin/munin10:05:280
1523299291,14cyclictest10380-21ntp_states11:25:230
150792291,5sleep10-21swapper/110:11:581
12072291,5sleep10-21swapper/112:28:121
96522281,5sleep10-21swapper/109:59:171
80062281,5sleep00-21swapper/009:55:060
287542280,7sleep10-21swapper/112:15:131
285432281,5sleep10-21swapper/109:21:041
263022281,5sleep10-21swapper/110:41:011
21402281,5sleep10-21swapper/108:11:421
206582281,5sleep10-21swapper/110:26:061
1523399286,4cyclictest81rcu_preempt10:53:391
1523399286,3cyclictest81rcu_preempt11:41:271
1523399286,10cyclictest2044-21in:imuxsock12:05:001
1523399285,4cyclictest81rcu_preempt09:44:111
1523399285,4cyclictest81rcu_preempt09:32:161
1523399284,4cyclictest81rcu_preempt12:51:251
1523399283,4cyclictest81rcu_preempt11:02:591
1523399283,4cyclictest81rcu_preempt08:17:041
1523399282,19cyclictest31196-21iostat_ios10:55:201
1523399281,4cyclictest81rcu_preempt09:17:271
15233992810,6cyclictest3286-21runrttasks09:45:241
15232992814,5cyclictest3-21ksoftirqd/007:36:240
15232992814,4cyclictest81rcu_preempt12:35:010
15232992812,5cyclictest3-21ksoftirqd/011:06:260
15232992810,6cyclictest21949-21grep09:05:150
248082271,5sleep10-21swapper/109:11:301
186452271,5sleep10-21swapper/111:48:261
1523399273,18cyclictest26778-21diskstats12:10:131
15233992723,2cyclictest0-21swapper/112:46:301
1523399272,21cyclictest0-21swapper/109:08:211
1523399271,22cyclictest18132-21memory10:20:211
15233992710,13cyclictest9221-21open_inodes08:30:251
1523299272,8cyclictest0-21swapper/011:30:180
15232992717,7cyclictest0-21swapper/010:02:480
133992271,5sleep10-21swapper/110:09:001
287892261,4sleep10-21swapper/107:57:081
1523399269,5cyclictest40250irq/92-i91508:55:251
1523399264,3cyclictest81rcu_preempt12:39:381
1523399263,3cyclictest81rcu_preempt10:45:141
15233992617,5cyclictest22-21ksoftirqd/107:40:061
15233992616,6cyclictest22-21ksoftirqd/111:34:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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