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2026-08-10 - 03:14

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 Aug 10, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
238209911641155,6cyclictest0-21swapper/119:25:091
238199911331099,24cyclictest0-21swapper/019:25:060
238209911051068,22cyclictest2592-21smartctl19:50:291
235512670622,32sleep10-21swapper/119:22:471
235592562517,29sleep00-21swapper/019:22:520
23819992441,238cyclictest0-21swapper/019:50:280
66642800,5sleep02381999cyclictest22:55:120
72572790,5sleep02381999cyclictest00:20:270
273012790,8sleep12382099cyclictest19:30:241
7252430,7sleep12382099cyclictest21:12:001
2381999401,14cyclictest8734-21kernelversion00:25:240
23820993725,7cyclictest9419-21iostat_ios21:35:181
23819993722,5cyclictest3-21ksoftirqd/000:33:130
23819993720,6cyclictest3-21ksoftirqd/023:41:230
23819993720,6cyclictest3-21ksoftirqd/021:44:060
2382099363,12cyclictest81rcu_preempt21:31:021
23819993621,5cyclictest3-21ksoftirqd/022:05:480
23819993620,6cyclictest3-21ksoftirqd/022:41:190
23819993620,6cyclictest3-21ksoftirqd/022:41:190
23819993619,6cyclictest3-21ksoftirqd/020:18:550
178522360,4sleep0111rcuc/023:25:000
23819993520,5cyclictest3-21ksoftirqd/022:03:030
23819993520,5cyclictest3-21ksoftirqd/000:02:400
23819993518,6cyclictest3-21ksoftirqd/019:47:030
23819993518,6cyclictest3-21ksoftirqd/000:51:390
23819993420,4cyclictest3-21ksoftirqd/021:50:510
23819993419,5cyclictest3-21ksoftirqd/021:33:550
23819993419,5cyclictest3-21ksoftirqd/020:05:430
23819993418,5cyclictest3-21ksoftirqd/023:28:290
23819993417,5cyclictest3-21ksoftirqd/023:37:460
191122341,5sleep119172-21iostat20:35:191
23819993318,5cyclictest3-21ksoftirqd/023:01:290
23819993317,6cyclictest3-21ksoftirqd/000:10:590
23819993317,5cyclictest3-21ksoftirqd/020:23:060
23819993311,4cyclictest40250irq/92-i91521:35:100
156602331,28sleep015664-21ntp_states20:25:250
286042321,27sleep128608-21irqstats21:00:211
273102320,8sleep02381999cyclictest19:30:260
23820993215,13cyclictest22-21ksoftirqd/100:28:431
2381999322,18cyclictest2401-21NetworkManager19:59:500
23819993218,4cyclictest3-21ksoftirqd/022:16:120
23819993218,4cyclictest3-21ksoftirqd/021:48:260
23819993218,4cyclictest3-21ksoftirqd/020:55:130
23819993217,5cyclictest3-21ksoftirqd/021:15:580
23819993217,5cyclictest3-21ksoftirqd/020:01:480
23819993216,5cyclictest3-21ksoftirqd/022:12:090
23819993216,5cyclictest3-21ksoftirqd/000:42:550
23819993215,6cyclictest3-21ksoftirqd/000:08:400
292052311,5sleep10-21swapper/122:28:241
23820993122,6cyclictest6705-21fschecks_time00:20:141
2382099311,5cyclictest81rcu_preempt20:31:281
2382099311,5cyclictest81rcu_preempt20:31:271
2381999317,12cyclictest25017-21/usr/sbin/munin20:50:220
23819993116,5cyclictest3-21ksoftirqd/022:49:370
23819993116,5cyclictest3-21ksoftirqd/021:03:120
23819993116,5cyclictest3-21ksoftirqd/020:48:500
23819993115,5cyclictest3-21ksoftirqd/023:32:410
23819993115,5cyclictest3-21ksoftirqd/020:12:310
53652300,8sleep12382099cyclictest00:15:281
2382099306,4cyclictest81rcu_preempt23:34:161
2382099303,14cyclictest0-21swapper/122:50:151
23820993018,7cyclictest14372-21iostat_ios00:40:201
2382099301,4cyclictest81rcu_preempt22:09:101
2381999309,5cyclictest17223-21hwlatdetect20:30:180
2381999309,5cyclictest17223-21hwlatdetect20:30:180
2381999303,7cyclictest0-21swapper/000:36:420
2381999302,25cyclictest3-21ksoftirqd/022:20:580
2381999302,14cyclictest3286-21runrttasks23:13:540
23819993017,4cyclictest3-21ksoftirqd/000:49:340
23819993015,5cyclictest3-21ksoftirqd/023:18:030
23819993014,5cyclictest3-21ksoftirqd/021:57:480
23819993010,6cyclictest3-21ksoftirqd/022:38:220
21782301,5sleep10-21swapper/100:09:461
7332291,5sleep00-21swapper/021:12:040
51152291,5sleep10-21swapper/119:58:421
47022291,5sleep00-21swapper/022:50:090
305912291,5sleep00-21swapper/023:57:050
290062291,5sleep00-21swapper/022:26:200
252382291,5sleep10-21swapper/122:16:251
2382099296,4cyclictest81rcu_preempt23:27:181
2382099296,11cyclictest81rcu_preempt21:20:001
2382099295,4cyclictest81rcu_preempt22:33:501
2382099294,18cyclictest31360-21diskstats00:00:171
2382099293,9cyclictest4460-21users21:20:301
23820992921,5cyclictest22-21ksoftirqd/123:15:131
2382099291,4cyclictest81rcu_preempt00:36:571
2381999299,4cyclictest30214-21grep21:05:140
2381999293,19cyclictest19073-21hddtemp_smartct20:35:180
23819992915,5cyclictest3-21ksoftirqd/019:36:280
23819992915,4cyclictest3-21ksoftirqd/021:24:550
23819992914,5cyclictest3-21ksoftirqd/019:41:340
2381999291,13cyclictest28342-21grep23:50:270
2381999291,13cyclictest21738-21users20:40:310
141642291,5sleep10-21swapper/121:48:301
67632281,5sleep00-21swapper/021:29:500
2382099285,4cyclictest81rcu_preempt23:46:171
2382099285,4cyclictest81rcu_preempt21:27:251
2382099285,3cyclictest81rcu_preempt20:11:381
2382099285,12cyclictest40250irq/92-i91523:05:301
2382099284,4cyclictest81rcu_preempt23:37:001
2382099284,4cyclictest81rcu_preempt22:13:371
2382099284,4cyclictest81rcu_preempt19:44:221
23820992819,5cyclictest26329-21cpuspeed_turbos20:55:161
2382099281,4cyclictest81rcu_preempt23:58:331
2382099281,4cyclictest81rcu_preempt00:53:421
23820992812,5cyclictest40250irq/92-i91523:40:141
2382099280,4cyclictest81rcu_preempt23:00:151
2381999284,8cyclictest25705-21diskstats23:45:140
23819992814,4cyclictest3-21ksoftirqd/000:18:240
179892281,5sleep10-21swapper/121:59:161
124782281,5sleep10-21swapper/120:17:001
117162281,5sleep00-21swapper/023:06:210
78662271,5sleep10-21swapper/122:55:341
297492271,5sleep10-21swapper/119:36:471
2382099279,7cyclictest25775-21/usr/sbin/munin22:20:301
2382099279,14cyclictest10018-21aten_r4power_cu00:30:111
2382099278,7cyclictest22954-21uname20:45:201
2382099275,4cyclictest81rcu_preempt21:08:181
2382099275,4cyclictest81rcu_preempt20:40:321
2382099274,4cyclictest81rcu_preempt00:11:331
2382099272,5cyclictest81rcu_preempt22:45:161
2382099271,4cyclictest81rcu_preempt22:42:051
2382099271,4cyclictest81rcu_preempt22:42:051
170092271,5sleep10-21swapper/100:46:041
158332271,5sleep10-21swapper/121:51:211
144652271,5sleep10-21swapper/120:22:551
112752271,5sleep10-21swapper/121:40:211
11152271,5sleep10-21swapper/119:47:201
272752261,5sleep10-21swapper/123:50:041
259252261,5sleep10-21swapper/120:54:501
2382099269,4cyclictest22-21ksoftirqd/123:20:211
2382099266,4cyclictest81rcu_preempt22:35:271
2382099264,4cyclictest81rcu_preempt20:06:051
2382099263,4cyclictest81rcu_preempt20:03:091
2382099262,8cyclictest15123-21df_inode20:25:151
2382099262,11cyclictest12830-21iostat_ios23:10:191
2381999261,12cyclictest30807-21taskset22:30:320
2382099252,4cyclictest81rcu_preempt22:00:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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