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2026-09-01 - 20:58

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 Tue Sep 01, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
193369912791,1274cyclictest0-21swapper/007:25:130
193379911911167,19cyclictest29349-21df10:40:121
193379910831065,15cyclictest19552-21aten_r4power_po07:25:111
191692564518,32sleep10-21swapper/107:23:511
191322484438,31sleep00-21swapper/007:23:260
1933699174145,24cyclictest0-21swapper/010:40:120
9842800,3sleep00-21swapper/009:25:130
259852471,29sleep126036-21tail10:30:221
317802430,3sleep041ktimersoftd/010:45:240
317802430,3sleep041ktimersoftd/010:45:240
101712410,5sleep11933799cyclictest11:15:151
19336994023,6cyclictest3-21ksoftirqd/009:07:170
141092390,4sleep0111rcuc/011:25:150
19336993822,5cyclictest3-21ksoftirqd/010:19:410
19336993821,6cyclictest3-21ksoftirqd/009:03:360
19336993721,6cyclictest3-21ksoftirqd/010:57:410
19336993620,5cyclictest3-21ksoftirqd/009:54:460
19336993620,5cyclictest3-21ksoftirqd/008:50:310
19336993619,6cyclictest3-21ksoftirqd/009:23:370
19336993520,6cyclictest3-21ksoftirqd/008:20:590
1933699351,19cyclictest7242-21grep09:40:210
1933699347,15cyclictest3-21ksoftirqd/012:04:330
19336993420,4cyclictest3-21ksoftirqd/012:18:230
19336993419,5cyclictest3-21ksoftirqd/009:33:260
19336993419,5cyclictest3-21ksoftirqd/007:32:390
19336993419,4cyclictest3-21ksoftirqd/010:36:060
19336993418,5cyclictest3-21ksoftirqd/008:11:260
19336993417,6cyclictest3-21ksoftirqd/011:05:430
161862341,29sleep016190-21diskstats10:05:160
69882331,28sleep07109-21df08:15:160
261142331,28sleep126123-21df_inode07:40:131
19336993319,4cyclictest3-21ksoftirqd/008:33:240
19336993318,5cyclictest3-21ksoftirqd/010:31:100
19336993318,5cyclictest3-21ksoftirqd/010:21:290
19336993317,5cyclictest3-21ksoftirqd/012:47:250
19336993313,6cyclictest11565-21gdbus12:06:560
19336993312,7cyclictest3-21ksoftirqd/012:21:170
1933699331,10cyclictest26662-21turbostat.cron12:00:000
106852331,28sleep010704-21ntp_states11:15:240
63212321,8sleep10-21swapper/108:11:271
309572321,9sleep00-21swapper/009:18:120
1933799325,4cyclictest81rcu_preempt08:18:001
1933699328,13cyclictest8580-21sendmail_mailqu12:35:270
19336993218,4cyclictest3-21ksoftirqd/011:51:220
19336993217,5cyclictest3-21ksoftirqd/012:34:380
19336993217,5cyclictest3-21ksoftirqd/010:50:450
19336993217,5cyclictest3-21ksoftirqd/009:58:340
19336993217,5cyclictest3-21ksoftirqd/009:36:030
19336993217,5cyclictest3-21ksoftirqd/007:48:550
19336993217,4cyclictest3-21ksoftirqd/008:36:560
19336993216,6cyclictest3-21ksoftirqd/011:24:560
19336993216,5cyclictest3-21ksoftirqd/011:03:240
19336993214,7cyclictest18170-21/usr/sbin/munin11:35:240
19336993213,4cyclictest40250irq/92-i91507:39:340
19336993212,6cyclictest3-21ksoftirqd/008:59:310
217862311,26sleep121869-21memory11:45:221
1933799311,5cyclictest81rcu_preempt09:29:281
1933799311,4cyclictest81rcu_preempt07:54:381
1933699318,7cyclictest3-21ksoftirqd/008:49:160
1933699316,21cyclictest31247-21latency12:10:220
1933699316,21cyclictest31247-21latency12:10:220
1933699312,12cyclictest734-21latency_hist08:00:000
19336993117,5cyclictest3-21ksoftirqd/008:28:080
19336993117,4cyclictest3-21ksoftirqd/010:10:290
19336993117,4cyclictest3-21ksoftirqd/009:14:030
19336993116,5cyclictest3-21ksoftirqd/007:51:230
19336993116,5cyclictest3-21ksoftirqd/007:44:370
19336993110,7cyclictest3-21ksoftirqd/012:28:510
157472310,4sleep1201rcuc/110:05:001
14882311,27sleep11498-21iostat_ios08:00:191
286662301,5sleep10-21swapper/110:37:471
1933799306,4cyclictest81rcu_preempt12:28:511
1933799304,4cyclictest81rcu_preempt09:40:081
19337993020,6cyclictest6344-21cpuspeed_turbos11:05:141
19337993015,11cyclictest5801-21grep09:35:301
1933799301,4cyclictest81rcu_preempt09:46:401
1933799301,4cyclictest81rcu_preempt08:49:161
1933699308,7cyclictest3-21ksoftirqd/011:33:310
1933699301,18cyclictest24835-21runrttasks10:26:560
19336993011,6cyclictest3-21ksoftirqd/010:02:010
109032301,5sleep00-21swapper/012:41:290
22432291,24sleep02223-21apt-get08:00:520
1933799295,4cyclictest81rcu_preempt12:43:131
1933799295,4cyclictest81rcu_preempt08:53:031
1933799294,4cyclictest81rcu_preempt12:32:011
1933799292,4cyclictest81rcu_preempt08:07:311
19337992922,5cyclictest0-21swapper/109:59:111
19337992916,7cyclictest20246-21iostat_ios10:15:191
1933699298,6cyclictest3-21ksoftirqd/008:07:310
1933699293,15cyclictest3-21ksoftirqd/009:49:330
1933699292,10cyclictest0-21swapper/012:50:290
104312291,5sleep10-21swapper/108:25:001
293542281,5sleep10-21swapper/107:49:221
235752281,4sleep10-21swapper/108:59:471
194392281,5sleep10-21swapper/110:14:361
1933799285,4cyclictest81rcu_preempt10:46:481
1933799285,4cyclictest81rcu_preempt10:46:481
1933799285,4cyclictest81rcu_preempt09:52:471
1933799285,3cyclictest81rcu_preempt12:10:471
1933799285,3cyclictest81rcu_preempt12:10:471
1933799284,8cyclictest25530-21iostat_ios11:55:201
1933799284,4cyclictest81rcu_preempt12:35:351
1933799284,3cyclictest81rcu_preempt09:33:021
1933799283,18cyclictest28800-21users09:10:291
1933799282,4cyclictest81rcu_preempt08:29:311
19337992819,5cyclictest13932-21uname12:50:211
1933799281,6cyclictest16152-21tr11:30:221
1933799281,5cyclictest81rcu_preempt10:29:461
1933699286,7cyclictest3-21ksoftirqd/011:10:030
1933699282,13cyclictest22010-21ntp_states11:45:260
18382281,5sleep10-21swapper/110:52:301
140722281,4sleep10-21swapper/108:33:481
127612281,5sleep10-21swapper/112:45:581
6402271,5sleep10-21swapper/107:59:201
38672271,5sleep10-21swapper/110:57:591
308352271,4sleep10-21swapper/109:17:011
252272271,5sleep10-21swapper/109:02:151
24192271,5sleep10-21swapper/112:20:161
236952271,4sleep10-21swapper/107:34:381
221452271,5sleep10-21swapper/110:20:191
1933799279,3cyclictest81rcu_preempt11:23:121
1933799273,3cyclictest81rcu_preempt12:18:531
1933799273,3cyclictest81rcu_preempt12:04:331
1933799273,3cyclictest81rcu_preempt11:50:431
1933799273,18cyclictest24537-21iostat_ios07:35:211
1933799271,8cyclictest17508-21unixbench_singl08:40:301
1933699275,7cyclictest11565-21gdbus11:43:060
1933699275,5cyclictest0-21swapper/008:40:310
56242261,5sleep10-21swapper/111:01:311
1933799266,4cyclictest81rcu_preempt08:37:061
1933799264,4cyclictest81rcu_preempt12:06:121
1933799263,8cyclictest25955-21diskstats09:05:171
1933799262,18cyclictest17405-21/usr/sbin/munin11:35:331
1933799260,4cyclictest81rcu_preempt11:10:031
151592261,5sleep10-21swapper/111:27:551
1933799256,5cyclictest40250irq/92-i91511:40:241
19337992517,5cyclictest22-21ksoftirqd/109:20:271
19337992515,6cyclictest16284-21fschecks_count10:05:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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