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2026-03-16 - 15:13

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 Mon Mar 16, 2026 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
267699911701138,18cyclictest0-21swapper/007:26:390
264442563518,30sleep00-21swapper/007:22:090
265832466370,29sleep10-21swapper/107:23:371
2677099218209,6cyclictest0-21swapper/107:26:391
983721130,7sleep02676999cyclictest12:04:370
262282980,8sleep12677099cyclictest10:40:251
215192970,5sleep00-21swapper/010:02:130
80042950,7sleep02676999cyclictest09:15:140
43302790,7sleep00-21swapper/010:18:080
26770995615,11cyclictest22-21ksoftirqd/111:35:101
2677099558,6cyclictest22-21ksoftirqd/112:17:291
2677099558,6cyclictest22-21ksoftirqd/112:17:281
26770995322,5cyclictest22-21ksoftirqd/112:51:361
26770995213,6cyclictest22-21ksoftirqd/109:05:231
26770995213,6cyclictest22-21ksoftirqd/109:05:221
26770995213,10cyclictest22-21ksoftirqd/111:00:141
26770995212,6cyclictest22-21ksoftirqd/111:20:121
26770995210,6cyclictest22-21ksoftirqd/112:38:101
26770995210,6cyclictest22-21ksoftirqd/110:36:371
26770995116,6cyclictest22-21ksoftirqd/112:25:521
26770995114,5cyclictest22-21ksoftirqd/107:40:121
26770995113,6cyclictest22-21ksoftirqd/111:15:121
26770995112,6cyclictest22-21ksoftirqd/110:55:181
26770995013,5cyclictest22-21ksoftirqd/110:00:281
26770995012,6cyclictest22-21ksoftirqd/112:30:191
26770995012,6cyclictest22-21ksoftirqd/112:20:131
26770995012,6cyclictest22-21ksoftirqd/111:25:241
26770995011,5cyclictest22-21ksoftirqd/109:10:181
2677099499,6cyclictest22-21ksoftirqd/109:40:231
2677099499,6cyclictest22-21ksoftirqd/109:40:231
2677099493,6cyclictest22-21ksoftirqd/110:21:581
26770994923,4cyclictest22-21ksoftirqd/111:56:081
26770994921,4cyclictest22-21ksoftirqd/110:30:221
26770994916,4cyclictest22-21ksoftirqd/110:47:281
26770994913,5cyclictest22-21ksoftirqd/112:40:251
26770994911,7cyclictest22-21ksoftirqd/112:12:421
26770994911,6cyclictest22-21ksoftirqd/108:30:111
26770994910,6cyclictest22-21ksoftirqd/110:25:121
26770994910,6cyclictest22-21ksoftirqd/108:45:271
2677099489,5cyclictest22-21ksoftirqd/112:05:251
2677099482,6cyclictest22-21ksoftirqd/111:40:451
2677099481,7cyclictest22-21ksoftirqd/109:28:081
26770994811,9cyclictest22-21ksoftirqd/109:35:281
26770994811,6cyclictest22-21ksoftirqd/112:00:421
26770994810,6cyclictest22-21ksoftirqd/108:05:131
2677099473,5cyclictest22-21ksoftirqd/111:30:461
26770994725,4cyclictest22-21ksoftirqd/109:20:231
26770994716,10cyclictest22-21ksoftirqd/111:45:251
26770994715,6cyclictest22-21ksoftirqd/110:09:381
26770994712,6cyclictest22-21ksoftirqd/111:12:071
26770994711,6cyclictest22-21ksoftirqd/107:45:131
40132460,6sleep14008-21unixbench_multi10:50:301
2677099469,5cyclictest22-21ksoftirqd/108:55:281
2677099468,6cyclictest22-21ksoftirqd/108:35:201
2677099463,5cyclictest22-21ksoftirqd/109:31:231
26770994623,11cyclictest22-21ksoftirqd/110:17:301
26770994615,6cyclictest22-21ksoftirqd/111:05:091
26770994611,6cyclictest22-21ksoftirqd/108:10:211
26770994610,6cyclictest22-21ksoftirqd/111:51:271
2677099458,6cyclictest22-21ksoftirqd/112:46:481
26770994513,9cyclictest22-21ksoftirqd/109:51:471
162852450,2sleep016289-21aten_r4power_vo08:20:120
2677099449,5cyclictest22-21ksoftirqd/107:35:241
2677099448,18cyclictest22-21ksoftirqd/109:19:291
26770994410,5cyclictest22-21ksoftirqd/109:55:321
247092440,4sleep00-21swapper/010:05:260
2677099438,6cyclictest22-21ksoftirqd/110:12:081
2677099435,6cyclictest11748-21kworker/1:008:25:151
2677099427,5cyclictest22-21ksoftirqd/109:47:361
26770994226,4cyclictest22-21ksoftirqd/107:55:251
2677099416,4cyclictest81rcu_preempt07:54:251
2677099406,4cyclictest81rcu_preempt07:30:141
26770994024,4cyclictest22-21ksoftirqd/108:15:281
26770994024,4cyclictest22-21ksoftirqd/108:00:171
26770994017,4cyclictest22-21ksoftirqd/108:20:241
26770993918,4cyclictest22-21ksoftirqd/108:40:161
26770993822,4cyclictest22-21ksoftirqd/108:50:211
26769993815,12cyclictest3-21ksoftirqd/012:30:220
148212381,4sleep014928-21mailstats11:35:270
139902380,8sleep02676999cyclictest09:55:060
34522371,32sleep03466-21ssh09:44:030
34522371,32sleep03466-21ssh09:44:030
2677099376,10cyclictest22-21ksoftirqd/109:00:121
2676999373,30cyclictest0-21swapper/010:45:160
2676999367,6cyclictest20560-21hddtemp_smartct12:15:190
2676999367,6cyclictest20560-21hddtemp_smartct12:15:180
2676999366,16cyclictest0-21swapper/009:24:100
2676999364,5cyclictest81rcu_preempt08:40:290
2676999363,4cyclictest81rcu_preempt09:45:250
2676999363,30cyclictest0-21swapper/011:15:150
2676999362,10cyclictest0-21swapper/012:44:200
26769993611,13cyclictest30305-21ssh10:10:560
61862351,9sleep00-21swapper/007:52:490
2676999358,13cyclictest20285-21ssh12:49:210
26769993526,5cyclictest28989-21munin-node07:30:020
26769993526,5cyclictest2309-21cron09:30:000
2676999352,29cyclictest0-21swapper/009:32:350
26769993512,5cyclictest0-21swapper/009:51:350
233532351,4sleep023364-21ssh11:45:040
2676999349,12cyclictest6923-21sh10:20:260
2676999345,4cyclictest81rcu_preempt11:42:410
2676999342,7cyclictest0-21swapper/011:21:150
2676999342,7cyclictest0-21swapper/010:27:150
26769993427,4cyclictest0-21swapper/009:13:160
26769993426,5cyclictest0-21swapper/012:35:550
26769993425,5cyclictest10908-21cut12:05:160
2676999342,4cyclictest81rcu_preempt09:36:090
26769993414,6cyclictest12617-21df_inode11:00:130
2676999341,30cyclictest0-21swapper/010:53:160
2676999334,4cyclictest81rcu_preempt10:41:220
2676999333,4cyclictest81rcu_preempt10:34:400
2676999331,4cyclictest26812-21ssh12:21:160
2676999331,30cyclictest0-21swapper/008:17:160
2676999331,13cyclictest0-21swapper/012:14:480
2676999331,12cyclictest0-21swapper/012:28:480
2381523312,6sleep03-21ksoftirqd/010:38:190
2676999324,4cyclictest81rcu_preempt12:52:040
2676999323,4cyclictest81rcu_preempt11:30:480
2676999322,14cyclictest28558-21df11:50:130
2676999321,5cyclictest0-21swapper/008:35:360
26769993214,6cyclictest11118-21iostat_ios08:05:200
2676999321,28cyclictest0-21swapper/007:55:160
2676999319,6cyclictest11680-21ssh10:59:300
2676999311,4cyclictest81rcu_preempt11:29:200
2676999311,4cyclictest0-21swapper/009:05:350
2676999311,4cyclictest0-21swapper/009:05:350
26769993113,5cyclictest927-21diskstats11:55:140
26769993113,5cyclictest13664-21users08:10:310
222932311,26sleep022303-21diskstats11:10:160
4312301,5sleep00-21swapper/009:04:340
289332301,5sleep00-21swapper/008:52:370
2676999304,3cyclictest0-21swapper/007:35:020
2676999301,4cyclictest81rcu_preempt11:05:110
2676999301,26cyclictest0-21swapper/007:49:550
100182301,5sleep00-21swapper/008:03:260
2676999295,4cyclictest81rcu_preempt08:34:180
23212291,5sleep00-21swapper/007:42:420
2676999287,10cyclictest26957-21sshd08:46:320
2676999271,12cyclictest18229-21/usr/sbin/munin08:25:130
2676999261,21cyclictest29328-21/usr/sbin/munin08:55:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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