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2026-09-11 - 22:59

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 Fri Sep 11, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
83479911641140,21cyclictest0-21swapper/007:25:120
83489910751065,6cyclictest7187-21strings11:35:221
81352569521,33sleep00-21swapper/007:23:200
70772566503,44sleep10-21swapper/107:20:171
834899172157,12cyclictest0-21swapper/107:25:111
2850321000,5sleep1834899cyclictest09:40:211
8347996439,9cyclictest0-21swapper/011:35:230
282042520,2sleep028205-21aten_r4power_cu08:15:100
121492400,7sleep10-21swapper/108:55:291
8347993922,6cyclictest3-21ksoftirqd/009:35:000
8347993922,6cyclictest3-21ksoftirqd/009:34:590
116992390,5sleep18345-21cyclictest07:30:211
8347993822,6cyclictest3-21ksoftirqd/007:48:000
8347993821,6cyclictest3-21ksoftirqd/009:24:280
8347993721,6cyclictest3-21ksoftirqd/010:59:500
8347993721,5cyclictest3-21ksoftirqd/011:26:060
8347993721,5cyclictest3-21ksoftirqd/010:53:490
8347993720,5cyclictest3-21ksoftirqd/012:42:510
8347993720,5cyclictest3-21ksoftirqd/012:06:560
8347993713,12cyclictest9115-21fschecks_time10:15:140
8347993711,8cyclictest3-21ksoftirqd/008:12:130
8347993619,5cyclictest3-21ksoftirqd/012:27:520
8347993612,8cyclictest3-21ksoftirqd/009:43:030
8347993612,8cyclictest3-21ksoftirqd/007:32:490
834799347,9cyclictest4215-21ntpq08:35:260
834799342,29cyclictest0-21swapper/007:50:370
834799341,21cyclictest30970-21seq11:13:500
834799341,20cyclictest13403-21iostat09:00:190
834799341,20cyclictest10887-21/usr/sbin/munin10:20:150
8347993411,7cyclictest3-21ksoftirqd/008:58:540
320682342,28sleep00-21swapper/008:25:130
187322341,29sleep118739-21diskstats09:15:141
133432341,29sleep113457-21grep10:25:261
834799337,8cyclictest28368-21taskset11:05:240
8347993318,5cyclictest3-21ksoftirqd/012:02:390
8347993316,5cyclictest0-21swapper/008:34:520
8347993314,5cyclictest26393-21cut11:00:230
8347993312,7cyclictest3-21ksoftirqd/007:57:120
834799331,20cyclictest28130-21grep12:30:320
834799331,20cyclictest12916-21/usr/sbin/munin11:50:240
8347993311,7cyclictest3-21ksoftirqd/012:36:290
8347993311,7cyclictest3-21ksoftirqd/011:56:050
8347993311,7cyclictest3-21ksoftirqd/009:55:260
8347993311,6cyclictest3-21ksoftirqd/010:35:250
8347993311,12cyclictest8345-21cyclictest07:39:530
8347993310,12cyclictest11565-21gdbus11:49:280
8348993222,6cyclictest28622-21taskset08:15:161
834799329,6cyclictest0-21swapper/007:41:500
834799328,8cyclictest8345-21cyclictest11:15:290
834799327,9cyclictest5461-21idleruntime10:05:170
834799321,9cyclictest23057-21awk09:25:240
8347993213,7cyclictest3286-21runrttasks12:54:530
8347993212,6cyclictest3-21ksoftirqd/010:41:530
834799321,19cyclictest8069-21/usr/sbin/munin10:10:340
834799321,19cyclictest4760-21latency_hist10:05:010
8347993210,12cyclictest8345-21cyclictest09:47:250
160402321,27sleep016053-21cron10:35:010
834899313,4cyclictest81rcu_preempt11:56:061
834799319,7cyclictest3-21ksoftirqd/012:22:380
834799319,12cyclictest8345-21cyclictest08:54:410
834799319,10cyclictest0-21swapper/009:50:440
834799318,13cyclictest22511-21python12:15:280
834799311,19cyclictest26981-21sensors_temp09:35:270
8347993110,7cyclictest3-21ksoftirqd/011:40:400
8347993110,6cyclictest3-21ksoftirqd/010:49:450
8347993110,6cyclictest3-21ksoftirqd/008:06:240
8347993110,5cyclictest4833-21expr11:30:190
834899304,23cyclictest0-21swapper/108:21:591
834899303,4cyclictest81rcu_preempt07:51:451
834899301,5cyclictest81rcu_preempt10:35:251
834799306,5cyclictest0-21swapper/012:45:240
8347993017,8cyclictest13267-21ntpdc10:25:220
8347993013,6cyclictest0-21swapper/008:49:130
66342301,5sleep00-21swapper/008:41:210
52012301,4sleep15210-21df_inode10:05:131
137912301,5sleep10-21swapper/111:54:531
103832301,5sleep10-21swapper/110:19:571
834899295,7cyclictest81rcu_preempt07:41:501
834899295,4cyclictest81rcu_preempt10:49:441
834899294,4cyclictest81rcu_preempt08:06:251
834899294,3cyclictest81rcu_preempt10:55:301
834899294,18cyclictest23694-21diskstats12:20:141
834899293,4cyclictest81rcu_preempt12:36:291
834899293,23cyclictest0-21swapper/108:11:001
8348992918,6cyclictest15638-21find09:05:271
834899291,4cyclictest81rcu_preempt09:55:261
834799297,6cyclictest1716-21python11:20:270
8347992912,6cyclictest0-21swapper/008:00:180
834799291,10cyclictest16620-21aten_r4power_en09:10:110
74072291,5sleep17489-21memory10:10:261
285012291,5sleep10-21swapper/112:31:161
210252291,5sleep00-21swapper/012:11:500
201152291,5sleep00-21swapper/009:19:340
180642291,5sleep10-21swapper/109:12:471
834899285,4cyclictest81rcu_preempt08:27:241
834899284,4cyclictest81rcu_preempt07:46:301
834899283,9cyclictest22869-21diskstats08:00:141
834899283,19cyclictest32223-21iostat_ios09:50:241
834899282,20cyclictest16334-21perl12:00:151
834899281,22cyclictest3329-21df10:00:131
8348992811,15cyclictest0-21swapper/109:20:181
8348992810,5cyclictest10577-21/usr/sbin/munin10:20:161
834799282,15cyclictest0-21swapper/008:21:080
68962281,5sleep10-21swapper/108:44:041
33672281,4sleep12257-21/usr/sbin/munin12:50:241
311312281,5sleep10-21swapper/109:46:411
29282281,5sleep10-21swapper/108:32:091
271552281,5sleep10-21swapper/111:03:071
254092281,4sleep10-21swapper/109:30:551
254092281,4sleep10-21swapper/109:30:541
229522281,5sleep10-21swapper/112:17:201
221152281,5sleep10-21swapper/107:57:091
17052281,5sleep10-21swapper/112:46:031
160802281,5sleep00-21swapper/009:06:430
145162281,5sleep10-21swapper/107:38:281
144662281,5sleep10-21swapper/109:04:251
97212271,5sleep10-21swapper/111:41:371
87392271,5sleep10-21swapper/108:48:421
834899279,15cyclictest25284-21aten_r4power_cu12:25:101
834899273,21cyclictest0-21swapper/111:12:411
834899272,21cyclictest5832-21users11:30:361
834899271,22cyclictest11314-21timerandwakeup11:45:261
46612271,5sleep10-21swapper/108:35:331
43152271,5sleep10-21swapper/111:29:111
211052271,5sleep10-21swapper/112:12:391
193392271,5sleep10-21swapper/112:08:491
8348992617,5cyclictest31278-21tr11:15:101
8348992617,5cyclictest22-21ksoftirqd/112:42:241
8348992617,5cyclictest22-21ksoftirqd/111:22:301
8348992617,5cyclictest22-21ksoftirqd/109:36:531
834899261,4cyclictest81rcu_preempt10:51:161
8348992610,12cyclictest0-21swapper/111:05:241
834899253,3cyclictest81rcu_preempt10:40:111
8348992516,6cyclictest22-21ksoftirqd/108:53:481
834899249,11cyclictest0-21swapper/109:25:181
834899236,4cyclictest0-21swapper/110:30:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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