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2026-04-02 - 17:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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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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 rack5slot3s.osadl.org (updated Thu Apr 02, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
123672240164,24sleep30-21swapper/307:06:483
124752238166,24sleep20-21swapper/207:08:122
123122228155,60sleep00-21swapper/007:06:040
123552203165,25sleep10-21swapper/107:06:381
1703121780,4sleep01275899cyclictest08:50:230
2838221560,5sleep21277099cyclictest09:15:252
3205021480,3sleep01275899cyclictest09:25:180
2666321460,4sleep01275899cyclictest11:40:180
1428021450,4sleep01275899cyclictest11:10:570
127709910990,18cyclictest0-21swapper/208:41:002
1277099105102,2cyclictest0-21swapper/209:38:422
12770998582,2cyclictest0-21swapper/212:19:332
12770996562,2cyclictest0-21swapper/207:51:232
28302570,2sleep10-21swapper/110:45:211
277272520,1sleep30-21swapper/308:00:013
1277099403,23cyclictest14366-40dnf11:12:052
12774993611,4cyclictest0-21swapper/311:00:153
1277499352,8cyclictest0-21swapper/311:12:053
1277099351,23cyclictest5623-21grep12:05:242
1277499341,11cyclictest22604-21kworker/u8:110:45:133
12770993410,20cyclictest16117-21systemd07:18:152
1277499332,5cyclictest13563-21sort07:15:023
12774993311,19cyclictest8681-21sh09:45:203
1275899338,12cyclictest24373-21diskmemload12:30:010
1275899335,13cyclictest24373-21diskmemload11:25:010
1277499328,3cyclictest0-21swapper/312:31:153
1277499321,5cyclictest27060-21expr09:15:123
1277499321,3cyclictest6335-21memory09:40:173
12774993212,17cyclictest30255-21smart_sda09:20:233
1277099320,4cyclictest0-21swapper/208:45:162
1277499317,3cyclictest16201-21awk10:05:003
1277499313,26cyclictest87350irq/126-enp1s0-10:11:113
1277499311,3cyclictest6029-21/usr/sbin/munin10:55:163
12774993111,3cyclictest4501-21wc09:35:233
1277099318,20cyclictest29277-21smart_sda11:45:232
1277099318,19cyclictest19051-21ntpq08:55:192
1277099314,23cyclictest26527-21/usr/sbin/munin11:40:172
1277099312,25cyclictest1383-21crond10:45:012
1277099311,5cyclictest0-21swapper/212:22:112
1277099311,27cyclictest27525-21latency_hist08:00:012
1277099311,18cyclictest2311-21hddtemp_smartct10:45:152
1275899312,13cyclictest27187-21awk10:30:010
1275899312,13cyclictest27187-21awk10:30:010
1277499309,3cyclictest23667-21gltestperf10:20:153
1277499302,6cyclictest15577-21munin-run08:50:013
1277499302,5cyclictest20869-21hddtemp_smartct09:00:163
1277499302,3cyclictest87350irq/126-enp1s0-11:05:193
1277499301,6cyclictest2993-21latency_hist09:35:013
12774993013,14cyclictest5096-21smart_sda10:50:233
12774993013,14cyclictest13246-21/usr/sbin/munin12:25:173
12774993010,3cyclictest16286-21latency_hist07:20:023
12774993010,2cyclictest2266-21/usr/sbin/munin12:00:113
1277499300,11cyclictest0-21swapper/308:20:133
1277099307,20cyclictest307-21/usr/sbin/munin08:15:162
1277099307,20cyclictest21426-21/usr/sbin/munin11:30:152
1277099305,3cyclictest32618-21wc09:25:252
1277099303,24cyclictest0-21swapper/207:35:112
1277099301,5cyclictest0-21swapper/211:26:002
1277099301,4cyclictest30559-21df_inode11:50:122
1277099301,4cyclictest16499-21/usr/sbin/munin12:30:202
1277099301,4cyclictest14379-21/usr/sbin/munin10:00:112
1277099301,3cyclictest17757-21/usr/sbin/munin11:20:162
12770993011,16cyclictest30153-21tune2fs10:35:142
12770993010,17cyclictest24362-21sh09:10:012
1276599302,3cyclictest28070-21switchtime09:15:231
1275899306,11cyclictest11178-21munin-run08:40:010
1275899301,5cyclictest0-21swapper/010:05:250
1277499299,3cyclictest7342-21expr08:30:133
1277499299,3cyclictest31338-21cpuspeed_turbos09:25:123
1277499298,4cyclictest17034-21grep08:50:233
1277499298,3cyclictest6780-21latency_hist08:30:013
1277499298,3cyclictest30106-21seq08:07:003
1277499298,3cyclictest30106-21seq08:07:003
1277499297,3cyclictest30479-21latency10:35:173
1277499292,9cyclictest26120-21unixbench_multi09:10:273
1277499292,5cyclictest1394-21munin-run10:45:013
1277499291,5cyclictest29980-21idleruntime-cro11:50:013
1277499291,4cyclictest87350irq/126-enp1s0-10:05:123
1277499291,4cyclictest12006-21/usr/sbin/munin09:55:123
12774992912,14cyclictest673-21sh08:15:123
12774992912,14cyclictest19935-21/usr/sbin/munin07:35:103
12774992911,3cyclictest827-21runrttasks07:31:003
1277499291,12cyclictest25208-21/usr/sbin/munin10:25:213
1277499291,12cyclictest25208-21/usr/sbin/munin10:25:213
1277499291,12cyclictest20879-21sshd11:26:023
12774992910,3cyclictest827-21runrttasks08:01:143
12774992910,3cyclictest8027-21sort12:10:223
12774992910,3cyclictest17641-21/usr/sbin/munin12:35:223
1277499290,3cyclictest9032-21cstates12:15:103
1277099299,17cyclictest7289-21grep12:10:132
1277099299,17cyclictest1-21systemd07:15:012
1277099298,18cyclictest24816-21sshd10:23:012
1277099297,19cyclictest18381-21latency_hist10:10:012
1277099296,20cyclictest23625-21cat07:45:142
1277099292,4cyclictest5153-21df_inode08:25:132
1277099292,4cyclictest19128-21/usr/sbin/munin12:35:252
1277099291,5cyclictest0-21swapper/211:00:262
1277099291,5cyclictest0-21swapper/210:50:242
1277099291,4cyclictest2925-21hddtemp_smartct12:00:152
1277099291,4cyclictest28316-21memory10:30:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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