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2026-09-24 - 06:16

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 highest latencies:
System rack9slot4s (updated Thu Sep 24, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14849912151191,20cyclictest0-21swapper/119:25:111
14839910811060,18cyclictest0-21swapper/019:25:160
10762466420,31sleep10-21swapper/119:21:181
10672462416,30sleep00-21swapper/019:21:120
262952940,10sleep0148399cyclictest00:45:170
21592940,9sleep0148399cyclictest23:40:290
67282910,3sleep16729-21grep19:35:191
54262810,4sleep041ktimersoftd/022:25:010
148399612,14cyclictest0-21swapper/019:45:200
148399604,9cyclictest19085-21ntp_states00:25:260
148399593,15cyclictest4251-21memory22:20:210
1483995721,32cyclictest19808-21seq20:10:170
148399562,14cyclictest32595-21ntp_states23:35:260
148399553,17cyclictest12801-21python19:50:280
148399541,13cyclictest26185-21grep20:25:290
148399541,12cyclictest6180-21grep23:50:280
148399534,12cyclictest0-21swapper/020:15:270
1483995317,6cyclictest26571-21cut23:20:140
1483995311,6cyclictest9280-21awk19:40:310
148399522,15cyclictest8022-21/usr/sbin/munin23:55:280
148399522,13cyclictest23379-21python23:10:310
1483995213,6cyclictest15222-21basename21:25:110
148399521,15cyclictest18380-21taskset21:30:440
148399521,13cyclictest4239-21if_eth019:30:060
148399519,6cyclictest9509-21grep00:00:200
148399519,5cyclictest4688-21/usr/sbin/munin20:55:240
148399519,5cyclictest27326-21/usr/sbin/munin20:30:180
148399512,14cyclictest28375-21/usr/sbin/munin00:50:220
148399511,15cyclictest20974-21/usr/sbin/munin23:05:170
148399511,14cyclictest20516-21cut00:30:160
148399511,13cyclictest19809-21unixbench_multi23:00:300
1483995110,5cyclictest7464-21chrt19:36:010
148399504,8cyclictest21535-21memory21:40:210
148399502,15cyclictest8719-21/usr/sbin/munin21:05:290
148399502,15cyclictest17738-21/usr/sbin/munin20:05:190
148399502,13cyclictest2401-21NetworkManager22:36:390
148399502,12cyclictest475-21/usr/sbin/munin22:10:290
148399502,12cyclictest0-21swapper/020:00:130
148399502,11cyclictest11379-21df_inode22:40:140
1483995013,6cyclictest32223-21runrttasks20:44:010
148399501,13cyclictest13314-21tune2fs22:45:150
148399501,12cyclictest6782-21tr21:00:250
148399501,12cyclictest28752-21aten_r4power_en20:35:090
148399501,12cyclictest25023-21grep00:40:290
148399494,9cyclictest15164-21memory00:15:210
148399492,5cyclictest0-21swapper/022:50:170
148399492,15cyclictest9839-21df_inode21:10:150
148399492,11cyclictest7410-21aten_r4power_vo22:30:110
148399491,14cyclictest24607-21/usr/sbin/munin21:50:140
148399491,14cyclictest12021-21taskset00:05:410
148399491,13cyclictest29661-21runrttasks22:00:380
148399491,12cyclictest28302-21diskstats23:25:120
148399491,12cyclictest24334-21basename23:15:110
148399484,8cyclictest30847-21iostat_ios22:05:200
148399482,15cyclictest13236-21/usr/sbin/munin00:10:180
148399482,12cyclictest2630-21memory20:50:240
148399482,12cyclictest2630-21memory20:50:230
148399482,11cyclictest3286-21runrttasks20:49:400
148399481,15cyclictest14685-21chrt21:21:160
148399476,12cyclictest24790-21cron20:24:590
148399475,9cyclictest17407-21memory22:55:270
148399474,9cyclictest16669-21diskstats00:20:140
148399472,17cyclictest4458-21/usr/sbin/munin23:45:280
148399472,13cyclictest23169-21/usr/sbin/munin21:45:150
148399471,15cyclictest30180-21diskstats23:30:140
148399464,10cyclictest12031-21iostat_ios21:15:230
148399463,9cyclictest13956-21diskstats19:55:140
148399462,15cyclictest27490-21python21:55:260
1483994612,6cyclictest23046-21ls00:35:300
148399461,16cyclictest3174-21cron22:18:000
148399452,11cyclictest0-21swapper/021:35:110
247142331,4sleep124729-21ntp_states00:40:251
208502331,28sleep120944-21aten_r4power_vo21:40:101
187742331,5sleep10-21swapper/120:06:111
98402321,27sleep19847-21diskstats21:10:171
148499325,4cyclictest81rcu_preempt21:22:291
24122311,26sleep10-21swapper/122:15:281
148499313,15cyclictest0-21swapper/122:00:271
1484993117,8cyclictest6086-21diskstats21:00:131
116062311,26sleep111680-21iostat22:40:191
48972301,5sleep10-21swapper/122:21:031
321942301,5sleep10-21swapper/120:43:481
272392301,5sleep10-21swapper/100:47:051
183702301,5sleep10-21swapper/122:59:271
148499303,9cyclictest12892-21diskstats00:10:111
148499303,10cyclictest4557-21diskstats19:30:181
148499301,6cyclictest0-21swapper/119:45:211
148499301,5cyclictest81rcu_preempt20:00:041
148499301,5cyclictest81rcu_preempt00:50:281
148499301,4cyclictest81rcu_preempt22:05:361
148499301,16cyclictest13299-21fschecks_count22:45:151
280172291,4sleep128098-21users20:30:321
241882291,5sleep10-21swapper/121:47:271
148499297,9cyclictest0-21swapper/100:30:271
148499295,4cyclictest81rcu_preempt23:09:241
148499294,4cyclictest81rcu_preempt21:58:031
148499293,19cyclictest24531-21diskstats23:15:141
148499291,8cyclictest29450-21sed20:35:201
148499291,6cyclictest81rcu_preempt00:38:001
148499291,4cyclictest81rcu_preempt23:29:371
148499291,4cyclictest81rcu_preempt19:59:321
148499291,15cyclictest820-21ntpq20:45:221
98782281,5sleep10-21swapper/122:35:221
88622281,5sleep10-21swapper/122:33:201
84012281,5sleep10-21swapper/123:57:191
260292281,5sleep10-21swapper/121:52:031
245302281,5sleep10-21swapper/120:22:181
225312281,5sleep10-21swapper/120:16:151
165942281,5sleep10-21swapper/121:26:411
148499286,4cyclictest81rcu_preempt20:56:411
148499285,4cyclictest81rcu_preempt22:26:511
148499283,4cyclictest81rcu_preempt22:52:441
148499282,22cyclictest0-21swapper/123:50:271
1484992818,6cyclictest31788-21wget23:35:121
1484992817,7cyclictest10016-21grep00:00:291
148499281,14cyclictest18979-21aten_r4power_cu21:35:111
148499280,4cyclictest81rcu_preempt23:42:501
133932281,5sleep10-21swapper/119:53:581
44752271,4sleep13188-21/usr/sbin/munin23:45:301
33712271,5sleep10-21swapper/120:51:131
33712271,5sleep10-21swapper/120:51:131
264362271,5sleep10-21swapper/120:27:381
238232271,5sleep10-21swapper/123:12:261
199502271,5sleep10-21swapper/100:29:541
163722271,5sleep10-21swapper/100:20:101
160402271,4sleep10-21swapper/100:18:271
148499279,14cyclictest19305-21/usr/sbin/munin20:10:221
148499275,4cyclictest81rcu_preempt23:33:131
148499275,4cyclictest81rcu_preempt23:22:261
148499271,4cyclictest81rcu_preempt22:10:411
1484992711,13cyclictest11440-21basename21:15:111
1484992710,5cyclictest3286-21runrttasks23:01:121
148499262,4cyclictest81rcu_preempt00:05:571
148499261,3cyclictest81rcu_preempt21:30:581
148499261,23cyclictest0-21swapper/121:08:311
1484992611,5cyclictest40250irq/92-i91519:40:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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