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2026-04-09 - 01:52

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 100 highest latencies:
System rack9slot4s (updated Wed Apr 08, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
106249912871217,65cyclictest11595-21ntp_states07:25:240
106259912671,5cyclictest11358-21iostat07:25:191
103902561517,30sleep00-21swapper/007:23:060
101912463418,31sleep10-21swapper/107:21:011
1062499147123,20cyclictest0-21swapper/011:55:280
114502950,8sleep00-21swapper/011:15:250
74262880,4sleep17424-21sh11:45:131
81702850,6sleep01062499cyclictest08:40:200
32462780,3sleep0111rcuc/012:14:380
28432780,5sleep01062499cyclictest08:25:280
228602660,4sleep041ktimersoftd/012:00:260
181942560,2sleep118190-21grep11:55:281
325912550,4sleep0111rcuc/008:20:110
276902471,28sleep127843-21awk12:05:291
10625994716,21cyclictest22-21ksoftirqd/109:17:311
37882452,4sleep00-21swapper/012:48:560
10625994317,10cyclictest22-21ksoftirqd/110:45:261
10625994315,17cyclictest22-21ksoftirqd/110:44:471
182682423,35sleep118281-21ssh09:42:061
10625994217,6cyclictest22-21ksoftirqd/111:37:291
10625994216,15cyclictest22-21ksoftirqd/112:20:531
10625994117,6cyclictest22-21ksoftirqd/112:38:351
10625994116,6cyclictest22-21ksoftirqd/109:35:281
10625994116,6cyclictest22-21ksoftirqd/109:35:271
10625994116,15cyclictest22-21ksoftirqd/111:06:491
1062499412,6cyclictest12220-21/usr/sbin/munin09:35:310
1062499412,6cyclictest12220-21/usr/sbin/munin09:35:300
190122401,35sleep019022-21ssh11:23:470
10625994017,14cyclictest22-21ksoftirqd/111:00:021
10625994016,6cyclictest22-21ksoftirqd/110:03:351
10625994015,15cyclictest22-21ksoftirqd/111:53:331
10625994015,15cyclictest22-21ksoftirqd/110:14:371
10625994015,15cyclictest22-21ksoftirqd/109:57:321
10625994015,11cyclictest22-21ksoftirqd/109:33:161
10625994015,10cyclictest22-21ksoftirqd/111:20:141
10625994014,6cyclictest22-21ksoftirqd/111:17:311
10625993917,8cyclictest22-21ksoftirqd/109:51:141
1062499398,11cyclictest27540-21ntp_offset08:05:230
1062499391,7cyclictest19725-21seq10:50:250
1062499391,22cyclictest31242-21ssh11:02:360
215602381,5sleep021574-21ssh12:33:080
10625993817,7cyclictest22-21ksoftirqd/110:57:161
10625993817,6cyclictest22-21ksoftirqd/111:30:441
10625993817,6cyclictest22-21ksoftirqd/109:25:561
10625993816,7cyclictest22-21ksoftirqd/110:24:531
1062499386,11cyclictest13748-21cat12:25:130
85982370,33sleep08608-21ssh11:12:420
269692371,5sleep026979-21ssh10:58:260
10625993717,6cyclictest22-21ksoftirqd/110:54:001
10625993717,6cyclictest22-21ksoftirqd/110:28:541
10625993716,7cyclictest22-21ksoftirqd/110:38:051
10625993716,6cyclictest22-21ksoftirqd/110:06:031
10625993715,7cyclictest22-21ksoftirqd/112:19:231
10625993715,7cyclictest22-21ksoftirqd/109:20:361
10625993712,6cyclictest22-21ksoftirqd/112:52:441
1062499379,12cyclictest9521-21ssh11:46:510
1062499378,12cyclictest138250irq/90-eth010:15:390
10624993724,9cyclictest25511-21ssh11:30:180
1062499372,14cyclictest0-21swapper/012:18:560
10625993615,6cyclictest22-21ksoftirqd/112:26:011
10625993615,11cyclictest0-21swapper/112:10:111
10625993612,5cyclictest13759-21fschecks_time07:30:161
10625993611,15cyclictest22-21ksoftirqd/110:15:571
10625993610,10cyclictest22-21ksoftirqd/109:10:111
1062499363,17cyclictest0-21swapper/012:40:160
1062499363,15cyclictest17263-21df_inode09:05:140
10624993627,5cyclictest1225-21hddtemp_smartct11:05:150
1062499362,30cyclictest0-21swapper/012:23:560
1062499362,14cyclictest4865-21/usr/sbin/munin10:35:210
1062499362,14cyclictest12914-21hddtemp_smartct10:10:170
1062499362,12cyclictest31653-21munin-node10:30:100
10624993617,4cyclictest0-21swapper/010:43:580
1062499361,5cyclictest19973-21proc_pri09:10:250
1062499361,20cyclictest22952-21/usr/sbin/munin07:55:100
10624993611,5cyclictest3048-21fschecks_count10:00:140
268112351,3sleep10-21swapper/108:05:121
1062599351,6cyclictest0-21swapper/109:47:361
10625993514,6cyclictest22-21ksoftirqd/112:48:371
10625993513,6cyclictest22-21ksoftirqd/110:32:081
1062499359,6cyclictest31146-21cat09:55:240
1062499355,13cyclictest16341-21ssh11:54:450
1062499355,12cyclictest0-21swapper/010:25:410
1062499352,28cyclictest13059-21munin-run08:55:010
1062499352,17cyclictest0-21swapper/009:16:210
1062499351,14cyclictest26614-21latency_hist08:05:000
10625993416,15cyclictest21068-40update-apt-xapi07:50:101
10625993414,6cyclictest22-21ksoftirqd/112:43:411
10625993412,6cyclictest22-21ksoftirqd/107:55:271
1062599341,21cyclictest9085-21cron08:43:001
1062499348,12cyclictest0-21swapper/009:41:140
1062499347,13cyclictest0-21swapper/010:46:290
1062499345,13cyclictest30497-21gdbus08:56:590
1062499345,11cyclictest15098-21/usr/sbin/munin09:00:230
1062499342,19cyclictest0-21swapper/009:29:050
1062499341,5cyclictest2403-21irqbalance10:07:160
1062499341,17cyclictest6322-21ssh12:50:510
10624993411,6cyclictest0-21swapper/011:29:290
1062499341,15cyclictest1968-21lldpad07:46:550
1062499341,13cyclictest30765-21df08:15:140
1062499341,12cyclictest24103-21/usr/sbin/munin12:35:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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