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2026-07-23 - 20:16

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 Jul 23, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
167900299816,25cyclictest0-21swapper/109:20:011
1679002997316,11cyclictest1687310-21/usr/sbin/munin07:55:201
1679002996725,36cyclictest0-21swapper/111:50:301
1679002996220,9cyclictest0-21swapper/110:35:251
1679002996132,25cyclictest0-21swapper/111:10:271
167900099613,9cyclictest1733067-21apt-get12:25:020
1679000996029,18cyclictest15-21rcuc/008:35:010
1679000995944,2cyclictest0-21swapper/012:10:010
167900099591,52cyclictest0-21swapper/008:20:110
1679002995821,8cyclictest1729620-21grep12:00:291
1679002995821,6cyclictest0-21swapper/112:20:001
1679002995728,24cyclictest0-21swapper/108:25:001
1679002995725,6cyclictest1718559-21grep10:55:281
1679000995749,5cyclictest0-21swapper/009:40:180
1679002995626,25cyclictest0-21swapper/111:30:281
167900299551,29cyclictest1682916-21/usr/sbin/munin07:30:221
167900299551,29cyclictest1682916-21/usr/sbin/munin07:30:211
1679000995545,5cyclictest1710838-21munin-plugin-st10:15:000
1679000995545,5cyclictest1710838-21munin-plugin-st10:15:000
1679000995449,3cyclictest0-21swapper/010:40:010
1679002995346,5cyclictest0-21swapper/108:25:191
1679002995319,5cyclictest1694480-21cut08:35:291
167900099532,48cyclictest0-21swapper/012:25:280
1679002995220,4cyclictest0-21swapper/110:10:271
1679002995220,4cyclictest0-21swapper/110:10:271
167900299521,28cyclictest0-21swapper/108:15:161
167900699511,17cyclictest0-21swapper/208:30:022
1679000995140,8cyclictest15-21rcuc/008:45:140
1679000995140,6cyclictest1716094-21munin-plugin-st10:45:000
1679006995027,18cyclictest1687953-21sendmail08:00:002
1679002995023,21cyclictest0-21swapper/107:40:211
1679000995041,4cyclictest167350irq/118-8000000.ethernet-tx010:15:170
167900099502,45cyclictest0-21swapper/011:30:280
1679006994936,8cyclictest0-21swapper/207:35:012
1679006994936,8cyclictest0-21swapper/207:35:012
167900299491,8cyclictest0-21swapper/111:25:011
1679000994931,15cyclictest167350irq/118-8000000.ethernet-tx009:05:230
167900099491,42cyclictest0-21swapper/007:30:010
167900099482,42cyclictest1697782-21phc2sys08:55:280
167900099481,40cyclictest0-21swapper/007:20:130
1679000994739,4cyclictest20650irq/252-8000000.ethernet11:40:180
1679000994723,22cyclictest15-21rcuc/009:00:250
1679000994723,22cyclictest15-21rcuc/009:00:250
1679006994635,6cyclictest1718526-21grep10:55:282
1679002994622,6cyclictest1686471-21/usr/sbin/munin07:50:111
1679000994639,4cyclictest167350irq/118-8000000.ethernet-tx011:20:130
1679000994637,5cyclictest0-21swapper/007:40:280
167900099462,41cyclictest0-21swapper/007:55:200
167900099461,39cyclictest12-21ksoftirqd/011:35:010
1679006994534,6cyclictest0-21swapper/209:25:002
167900299458,4cyclictest0-21swapper/109:15:011
1679000994534,6cyclictest0-21swapper/007:50:290
1679000994533,8cyclictest0-21swapper/010:25:010
1679000994526,14cyclictest131ktimers/011:10:100
1679000994526,13cyclictest0-21swapper/009:50:020
167900099451,42cyclictest0-21swapper/008:25:270
167900099451,40cyclictest1708894-21ps10:00:280
1679006994437,4cyclictest1727993-21munin-plugin-st11:55:002
167900299446,5cyclictest1706700-21gpg-connect-age09:50:021
1679000994430,9cyclictest0-21swapper/008:50:280
167900099442,9cyclictest274-21systemd-journal12:20:000
167900099442,5cyclictest1729114-21df_inode12:00:180
167900099442,37cyclictest1726957-21/usr/sbin/munin11:45:280
167900099441,40cyclictest0-21swapper/009:50:050
1679002994333,7cyclictest1735691-21sendmail12:40:001
1679002994331,8cyclictest1721681-21phc2sys11:15:251
167900099436,15cyclictest12-21ksoftirqd/007:10:010
1679000994334,6cyclictest1704713-21find09:35:280
1679000994334,5cyclictest20850irq/208-8000000.ethernet09:30:300
1679000994326,13cyclictest131ktimers/010:55:130
167900099432,5cyclictest1716346-21df10:45:160
167900099431,36cyclictest1722152-21latency_hist11:20:020
1679000994313,16cyclictest12-21ksoftirqd/009:25:010
1679000994236,3cyclictest0-21swapper/010:25:280
1679000994235,4cyclictest0-21swapper/009:15:220
1679000994234,5cyclictest0-21swapper/011:05:000
1679000994234,4cyclictest167350irq/118-8000000.ethernet-tx007:35:170
1679000994230,7cyclictest0-21swapper/008:30:280
167900099421,4cyclictest1735335-21memory12:35:230
167900099421,36cyclictest0-21swapper/009:55:010
167900099421,35cyclictest1703284-21wc09:30:010
1679006994127,10cyclictest0-21swapper/208:50:002
1679002994128,8cyclictest0-21swapper/110:45:001
167900299411,38cyclictest0-21swapper/109:55:001
167900099414,10cyclictest1683720-21gpg-connect-age07:35:010
167900099414,10cyclictest1683720-21gpg-connect-age07:35:010
167900099413,4cyclictest1727600-21cat11:50:230
1679000994129,6cyclictest0-21swapper/007:45:270
167900099411,3cyclictest1720462-21latency_hist11:10:010
167900099411,38cyclictest0-21swapper/010:30:230
167900099411,38cyclictest0-21swapper/010:30:230
167900099411,38cyclictest0-21swapper/008:10:270
167900099411,38cyclictest0-21swapper/008:10:270
1679006994030,6cyclictest1698889-21grep09:00:292
1679006994030,6cyclictest1698889-21grep09:00:292
1679006994029,7cyclictest0-21swapper/210:20:272
1679006994028,8cyclictest0-21swapper/212:15:292
1679006994024,11cyclictest1283-21cron11:30:002
1679006994024,11cyclictest1283-21cron11:30:002
1679002994028,8cyclictest1704841-21munin-plugin-st09:40:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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