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2026-04-19 - 20:35

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 Sun Apr 19, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1684642999790,4cyclictest231ktimers/109:55:011
1684644998763,17cyclictest0-21swapper/208:40:012
168464499831,34cyclictest30-21rcuc/210:20:192
1684644997140,22cyclictest0-21swapper/211:30:022
1684642996861,4cyclictest24-21ksoftirqd/110:15:191
168464499612,27cyclictest30-21rcuc/211:00:012
1684644995942,12cyclictest311ktimers/210:35:132
168463999558,11cyclictest1733540-21apt-get11:55:010
1684644995432,14cyclictest0-21swapper/209:10:022
1684644995333,16cyclictest311ktimers/210:10:152
1684639995221,28cyclictest1693791-21/usr/sbin/munin08:00:170
1684639995211,38cyclictest1720478-21cut10:35:270
168463999502,42cyclictest1705424-21latency_hist09:10:010
1684639995010,3cyclictest1690869-21users07:40:290
1684644994937,8cyclictest1690043-21sendmail07:40:002
1684644994928,14cyclictest311ktimers/207:50:132
1684642994940,5cyclictest1722484-21munin-plugin-st10:50:001
1684642994933,11cyclictest0-21swapper/111:24:591
1684639994914,13cyclictest0-21swapper/012:20:010
1684639994838,7cyclictest1719017-21apt-get10:30:010
168463999483,41cyclictest0-21swapper/007:15:200
168463999480,45cyclictest0-21swapper/010:15:270
1684644994728,13cyclictest311ktimers/211:40:132
1684642994736,8cyclictest231ktimers/109:40:211
1684642994736,6cyclictest231ktimers/109:30:121
1684639994739,4cyclictest167350irq/118-8000000.ethernet-tx009:45:180
1684639994729,15cyclictest167350irq/118-8000000.ethernet-tx009:30:160
168463999472,5cyclictest0-21swapper/012:35:170
1684639994718,17cyclictest15-21rcuc/011:25:010
168463999471,43cyclictest0-21swapper/009:55:160
1684644994637,5cyclictest1696046-21munin-plugin-st08:15:002
1684644994625,13cyclictest311ktimers/211:05:122
1684642994635,7cyclictest1736171-21munin-plugin-st12:10:001
1684642994633,8cyclictest0-21swapper/107:15:001
1684642994631,10cyclictest0-21swapper/108:45:311
1684642994629,11cyclictest0-21swapper/111:35:291
168463999468,36cyclictest1688817-21irqstats07:30:220
1684639994629,12cyclictest0-21swapper/008:25:170
1684639994618,3cyclictest1695177-21users08:05:310
1684639994617,3cyclictest1716365-21users10:10:280
1684644994536,5cyclictest0-21swapper/207:20:012
1684644994524,13cyclictest311ktimers/210:00:102
1684642994530,9cyclictest0-21swapper/107:15:281
1684639994539,2cyclictest0-21swapper/010:55:260
1684639994538,4cyclictest20850irq/208-8000000.ethernet09:10:190
168463999451,4cyclictest1703441-21gunzip08:55:270
168463999451,41cyclictest0-21swapper/011:25:240
1684642994438,4cyclictest0-21swapper/112:20:021
1684642994434,6cyclictest1738727-21grep12:20:291
1684642994430,8cyclictest0-21swapper/111:55:291
168463999448,34cyclictest0-21swapper/012:20:190
168463999444,2cyclictest0-21swapper/011:10:000
168463999442,6cyclictest1740449-21users12:30:300
168463999442,3cyclictest1687429-21munin-run07:25:000
1684639994417,3cyclictest1693510-21munin-run08:00:010
168463999441,41cyclictest0-21swapper/012:25:160
168463999441,41cyclictest0-21swapper/012:25:150
1684642994333,6cyclictest1703652-21sendmail09:00:001
1684642994330,9cyclictest231ktimers/108:30:001
1684642994315,13cyclictest1718382-21/usr/sbin/munin10:25:201
168463999438,32cyclictest1704024-21fschecks_time09:00:200
1684639994316,3cyclictest1701621-21meminfo08:45:260
1684644994227,11cyclictest311ktimers/211:55:122
1684644994222,14cyclictest311ktimers/208:50:122
1684644994218,17cyclictest311ktimers/212:15:142
1684642994232,6cyclictest0-21swapper/109:55:291
1684642994232,5cyclictest0-21swapper/111:15:291
1684642994229,8cyclictest0-21swapper/112:25:291
1684642994229,8cyclictest0-21swapper/112:25:291
1684642994228,8cyclictest22-21rcuc/107:25:011
1684642994228,8cyclictest0-21swapper/108:35:291
168463999429,26cyclictest0-21swapper/011:50:030
1684639994234,4cyclictest1725214-21sed11:05:020
1684644994129,8cyclictest1694130-21ptp4l08:00:262
1684644994126,10cyclictest0-21swapper/207:25:012
1684644994123,13cyclictest311ktimers/208:40:112
1684644994120,14cyclictest311ktimers/212:05:122
1684642994130,6cyclictest231ktimers/111:25:121
1684642994130,5cyclictest0-21swapper/110:20:291
1684642994128,9cyclictest0-21swapper/108:20:291
1684642994128,9cyclictest0-21swapper/108:20:291
1684642994123,12cyclictest1725970-21latency_hist11:10:001
1684639994134,4cyclictest167350irq/118-8000000.ethernet-tx010:40:250
168463999412,4cyclictest1736975-21/usr/sbin/munin12:10:280
168463999412,4cyclictest1736975-21/usr/sbin/munin12:10:280
168463999412,37cyclictest0-21swapper/008:45:000
168463999411,38cyclictest1692275-21if_eth107:50:230
1684639994110,29cyclictest1698842-21df08:30:190
1684644994031,5cyclictest0-21swapper/208:00:002
1684644994026,7cyclictest0-21swapper/210:45:282
1684644994014,12cyclictest141rcu_preempt08:10:012
1684642994032,4cyclictest231ktimers/107:40:191
1684642994031,5cyclictest14-21rcu_preempt07:55:221
1684642994025,11cyclictest0-21swapper/111:50:281
1684639994035,2cyclictest0-21swapper/009:25:200
1684639994031,5cyclictest0-21swapper/007:10:190
1684639994028,9cyclictest0-21swapper/011:15:000
168463999402,3cyclictest1717856-21ptp4l10:20:270
168463999402,11cyclictest0-21swapper/008:15:010
168463999401,4cyclictest1719017-21apt-get10:30:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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