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2026-08-06 - 05:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Thu Aug 06, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
961429997135,30cyclictest0-21swapper/219:20:002
96142999701,55cyclictest0-21swapper/221:15:162
96142999694,52cyclictest973969-21/usr/sbin/munin20:20:192
961428996812,23cyclictest0-21swapper/100:40:001
96142999671,56cyclictest0-21swapper/220:35:112
96142999671,54cyclictest0-21swapper/223:25:122
96142999661,53cyclictest0-21swapper/223:00:122
961429996524,32cyclictest0-21swapper/221:25:302
96142999651,51cyclictest0-21swapper/223:35:142
96142999651,51cyclictest0-21swapper/220:15:122
961429996441,20cyclictest964306-21munin-plugin-st19:25:002
961429996441,20cyclictest964306-21munin-plugin-st19:25:002
96142999631,50cyclictest0-21swapper/222:55:112
96142999631,50cyclictest0-21swapper/222:50:122
961429996240,18cyclictest995811-21munin-plugin-st22:30:002
961429996235,23cyclictest989050-21munin-plugin-st21:50:002
96142999622,52cyclictest1009606-21apt-get23:50:142
96142999622,46cyclictest1017011-21apt-get00:35:012
961429996222,33cyclictest0-21swapper/222:20:282
96142999621,49cyclictest0-21swapper/222:35:152
96142999621,49cyclictest0-21swapper/221:30:112
96142999611,48cyclictest0-21swapper/219:45:112
96142999611,45cyclictest0-21swapper/220:50:102
961425996150,5cyclictest131ktimers/020:45:190
96142999601,46cyclictest0-21swapper/223:45:102
96142999601,45cyclictest0-21swapper/221:00:112
96142999592,49cyclictest982594-21ssh21:10:222
961429995914,36cyclictest0-21swapper/221:20:332
961429995914,36cyclictest0-21swapper/221:20:322
961429995912,40cyclictest167550irq/134-8000000.ethernet-tx223:55:102
96142999582,48cyclictest1012977-21munin-node00:10:092
96142999582,48cyclictest1003690-21apt-get23:15:112
96142999581,46cyclictest0-21swapper/220:00:112
96142999581,43cyclictest0-21swapper/223:30:152
96142999581,43cyclictest0-21swapper/219:40:192
961429995814,39cyclictest1660-21snmpd00:38:542
961429995729,21cyclictest0-21swapper/222:30:202
96142999571,48cyclictest1014113-21/usr/sbin/munin00:15:242
96142999571,45cyclictest0-21swapper/221:40:152
96142999571,43cyclictest0-21swapper/221:05:142
96142999571,43cyclictest0-21swapper/220:55:132
961428995735,12cyclictest231ktimers/122:15:011
96142999564,44cyclictest970130-21unixbench_singl19:55:292
961429995624,27cyclictest0-21swapper/220:15:012
961429995619,32cyclictest0-21swapper/222:00:022
96142999561,47cyclictest968721-21apt-get19:50:132
96142999561,46cyclictest971557-21memory20:05:282
961428995611,6cyclictest986421-21apt-get21:35:011
961425995614,39cyclictest1008413-21mailstats23:40:270
961429995532,19cyclictest1002606-21unixbench_singl23:05:272
96142999552,45cyclictest977349-21apt-get20:40:132
96142999552,45cyclictest977349-21apt-get20:40:132
96142999552,45cyclictest966187-21apt-get19:35:152
96142999551,48cyclictest994086-21sshd22:15:452
96142999551,48cyclictest0-21swapper/222:45:182
96142999543,44cyclictest1015891-21/usr/sbin/munin00:25:242
96142999541,46cyclictest989296-21/usr/sbin/munin21:50:172
96142999541,46cyclictest986784-21/usr/sbin/munin21:35:182
96142999541,42cyclictest0-21swapper/200:20:132
96142999532,44cyclictest991871-21/usr/sbin/munin22:05:182
96142999532,44cyclictest975123-21/usr/sbin/munin20:25:272
96142999532,44cyclictest964506-21munin-node19:25:112
96142999531,47cyclictest1004547-21/usr/sbin/munin23:20:292
96142999531,47cyclictest1004547-21/usr/sbin/munin23:20:282
96142999531,46cyclictest0-21swapper/200:00:232
96142999531,46cyclictest0-21swapper/200:00:232
96142999531,45cyclictest990951-21apt-get22:00:142
96142999531,45cyclictest990951-21apt-get22:00:142
96142999531,45cyclictest1012342-21/usr/sbin/munin00:05:272
96142999531,45cyclictest1008106-21/usr/sbin/munin23:40:202
96142999531,45cyclictest1003471-21sshd23:12:442
96142999531,44cyclictest978392-21/usr/sbin/munin20:45:212
96142999531,43cyclictest965346-21apt-get19:30:142
961428995322,18cyclictest231ktimers/119:35:121
96142999522,43cyclictest962027-21/usr/sbin/munin19:10:272
96142999521,44cyclictest992864-21/usr/sbin/munin22:10:212
96142999521,43cyclictest975648-21munin-node20:30:112
961425995218,30cyclictest0-21swapper/023:20:000
96142999511,43cyclictest998057-21/usr/sbin/munin22:40:232
96142599508,4cyclictest0-21swapper/023:00:170
961425995032,15cyclictest167350irq/118-8000000.ethernet-tx020:55:260
961428994940,6cyclictest994109-21cron22:20:011
961428994939,6cyclictest996650-21munin-plugin-st22:35:001
961425994940,6cyclictest973761-21sendmail20:20:000
961425994937,8cyclictest970605-21grep20:00:220
96142599492,40cyclictest986698-21latency_hist21:35:020
961425994837,7cyclictest1017125-21grep00:35:020
96142599481,42cyclictest988548-21tune2fs21:45:210
961425994729,14cyclictest167350irq/118-8000000.ethernet-tx000:00:130
961425994729,14cyclictest167350irq/118-8000000.ethernet-tx000:00:120
961425994718,27cyclictest15-21rcuc/020:30:200
96142599466,38cyclictest0-21swapper/023:40:000
96142599462,40cyclictest1003396-21grep23:10:290
961428994533,9cyclictest978111-21cat20:45:021
961428994533,9cyclictest978111-21cat20:45:021
961425994537,4cyclictest167350irq/118-8000000.ethernet-tx022:05:220
961425994536,5cyclictest167350irq/118-8000000.ethernet-tx023:20:290
961425994536,5cyclictest167350irq/118-8000000.ethernet-tx023:20:280
96142899448,5cyclictest972056-21gpg-connect-age20:10:001
96142599446,34cyclictest967232-21tune2fs19:40:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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