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2026-03-19 - 00:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rackbslot7s.osadl.org (updated Wed Mar 18, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194172221012,2182sleep319387-21apt-get12:18:243
5885280312,775sleep122524-1kworker/1:1H08:08:071
1566327186,699sleep215706-21ntpq08:38:202
6518245912,431sleep06552-21/usr/sbin/munin09:53:210
8732237717,336sleep08752-21apt08:17:550
13207233113,156sleep213301-21threads10:13:342
23922232017,285sleep123998-21/usr/sbin/munin07:23:241
22258225694,45sleep20-21swapper/212:27:562
7406225040,194sleep27442-21awk09:57:552
7376224317,203sleep27542-21unixbench_multi11:38:262
14568222231,175sleep214676-21fschecks_time12:03:172
32691221013,180sleep132732-21latency_hist11:17:571
11935220432,125sleep212020-21awk11:53:282
2008422020,7sleep00-21swapper/008:53:150
2008422020,7sleep00-21swapper/008:53:150
264192196110,63sleep20-21swapper/209:13:172
19389218811,123sleep20-21swapper/212:18:072
18841218512,99sleep218872-21grep12:17:552
1190621809,98sleep212015-21cut08:27:582
22057217534,115sleep20-21swapper/210:43:142
22896217412,147sleep222940-21ntpq12:28:212
23734217135,120sleep223865-21grep09:03:282
23734217135,120sleep223865-21grep09:03:282
635216953,73sleep20-21swapper/211:18:152
19402216918,29sleep00-21swapper/012:18:130
2581921677,126sleep213441-21snmpd09:12:162
2581921677,126sleep213441-21snmpd09:12:162
31459216667,81sleep231593-21timerwakeupswit09:28:272
1784216510,143sleep01823-21expr09:38:230
1775216117,126sleep31777-21cron07:57:553
31147216035,109sleep231298-21latency_hist11:12:582
784215994,40sleep20-21swapper/207:53:172
3178821596,141sleep00-21swapper/009:28:580
20015215635,21sleep20-21swapper/207:13:032
31427215432,101sleep20-21swapper/211:13:142
6293215318,21sleep00-21swapper/008:08:260
18419215380,55sleep218476-21fschecks_count07:08:152
18419215380,55sleep218476-21fschecks_count07:08:152
11047215378,57sleep20-21swapper/211:52:552
10246215320,115sleep010272-21/usr/sbin/munin11:48:210
29063214855,32sleep229217-21latency_hist09:22:582
26876214848,29sleep226941-21grep07:33:142
16246214512,117sleep316247-21sshd08:39:223
2476214264,66sleep22481-21fschecks_count07:58:342
5385214119,88sleep20-21swapper/208:07:552
22814214122,95sleep00-21swapper/009:02:570
18071214017,100sleep118118-21latency_hist07:07:581
4113213970,16sleep20-21swapper/211:28:242
1891621376,10sleep10-21swapper/110:33:111
17328213641,73sleep20-21swapper/212:12:582
24042213517,26sleep20-21swapper/212:33:092
22140213420,96sleep20-21swapper/207:18:202
18840213315,21sleep00-21swapper/008:48:240
18840213315,21sleep00-21swapper/008:48:240
5655212812,66sleep20-21swapper/211:33:252
17274212821,91sleep317306-21basename12:12:553
12181212612,98sleep212336-21latency_hist10:12:572
23521212534,45sleep20-21swapper/210:48:102
9741212434,19sleep29894-21sed08:18:252
7904212335,18sleep27946-21cat09:58:152
29926212232,13sleep20-21swapper/207:43:122
29926212232,13sleep20-21swapper/207:43:122
27192212112,18sleep20-21swapper/210:58:242
15020212116,15sleep30-21swapper/308:37:573
5840212013,80sleep05976-21grep11:33:270
15268212018,26sleep00-21swapper/008:38:100
690721195,64sleep20-21swapper/208:09:292
1844821177,45sleep218345-21/usr/sbin/munin08:48:132
1844821177,45sleep218345-21/usr/sbin/munin08:48:132
19113211612,89sleep219133-21kernelversion10:33:162
23705211510,92sleep023757-21cat10:48:160
23145211516,75sleep023278-21ls12:28:270
17564211520,72sleep317616-21cpuspeed12:13:113
15043211513,87sleep015188-21latency_hist08:37:580
8878211426,12sleep20-21swapper/211:43:262
6470211419,74sleep36622-21latency_hist11:37:583
23516211416,83sleep323557-21grep09:03:253
23516211416,83sleep323557-21grep09:03:253
21497211417,84sleep221490-21apt-get08:58:112
1513121136,14sleep00-21swapper/010:18:450
1513121136,14sleep00-21swapper/010:18:450
14171211322,18sleep20-21swapper/210:18:062
14171211322,18sleep20-21swapper/210:18:062
414921126,10sleep20-21swapper/209:45:522
4130211116,75sleep04114-21apt-get08:03:130
9371211014,78sleep09459-21/usr/sbin/munin10:03:140
19368210914,78sleep118860-21apt-get12:18:061
1322921095,10sleep20-21swapper/208:30:452
29288210812,16sleep00-21swapper/009:23:080
2945121075,66sleep20-21swapper/211:07:122
2061621060,6sleep00-21swapper/007:13:210
114221065,10sleep20-21swapper/209:37:202
568321046,64sleep20-21swapper/209:50:402
26553210414,65sleep20-21swapper/207:32:582
10578210420,63sleep210590-21latency_hist10:07:562
8464210219,60sleep18616-21sed09:58:261
26326210210,22sleep226359-21sendmail10:57:552
13397210212,78sleep213478-21mailstats11:58:242
1501210169,20sleep21503-21apt-get09:38:082
3026121007,74sleep00-21swapper/011:08:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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