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2026-06-15 - 08:18

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 Mon Jun 15, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
124252799721,59cyclictest0-21swapper/021:40:110
1242527996852,13cyclictest0-21swapper/023:00:020
124252799622,57cyclictest131ktimers/020:35:200
1242530995817,17cyclictest1293521-21/usr/sbin/munin00:05:201
124252799541,45cyclictest0-21swapper/021:05:000
1242527995411,40cyclictest0-21swapper/000:00:000
1242527995142,5cyclictest167350irq/118-8000000.ethernet-tx022:30:260
1242527995043,4cyclictest0-21swapper/022:05:230
1242527995033,15cyclictest167350irq/118-8000000.ethernet-tx021:10:170
1242527995021,24cyclictest0-21swapper/020:10:240
1242527994942,4cyclictest167350irq/118-8000000.ethernet-tx021:30:190
1242527994926,18cyclictest15-21rcuc/019:50:120
1242527994926,18cyclictest15-21rcuc/019:50:120
124252799491,44cyclictest1294775-21ptp4l00:10:290
124252799491,41cyclictest1279048-21latency_hist22:40:010
1242532994816,19cyclictest1243815-21/usr/sbin/munin19:15:182
124252799481,45cyclictest0-21swapper/022:55:010
1242532994738,5cyclictest1247853-21apt-get19:40:012
1242527994740,4cyclictest167350irq/118-8000000.ethernet-tx000:30:240
124252799472,42cyclictest1292691-21sh00:00:200
124252799471,43cyclictest0-21swapper/019:30:290
124253099468,11cyclictest22-21rcuc/123:00:021
1242530994636,5cyclictest1277975-21apt-key22:35:001
1242530994635,7cyclictest1267548-21grep21:30:301
1242530994632,9cyclictest0-21swapper/120:30:301
1242530994632,5cyclictest0-21swapper/122:35:281
1242530994615,16cyclictest22-21rcuc/121:40:011
1242527994635,7cyclictest0-21swapper/019:45:290
124252799461,41cyclictest1288789-21grep23:35:270
1242532994530,9cyclictest0-21swapper/200:20:302
1242532994513,20cyclictest1277203-21/usr/sbin/munin22:30:212
1242530994529,12cyclictest1254685-21sendmail20:20:001
1242530994527,6cyclictest0-21swapper/119:20:001
1242527994538,4cyclictest167350irq/118-8000000.ethernet-tx023:10:150
124252799453,5cyclictest1255899-21diskstats20:25:180
124252799451,38cyclictest0-21swapper/022:25:020
1242532994431,10cyclictest1278795-21apt-get22:40:002
1242530994436,6cyclictest231ktimers/119:55:121
1242527994434,7cyclictest0-21swapper/000:25:300
1242527994433,8cyclictest0-21swapper/020:20:000
1242527994431,8cyclictest0-21swapper/023:30:280
124252799442,4cyclictest1247839-21munin-run19:40:000
124252799441,41cyclictest1244978-21memory19:20:250
124252799441,41cyclictest0-21swapper/023:40:120
124252799441,40cyclictest1291508-21users23:50:290
124252799441,40cyclictest1260292-21sh20:50:210
124252799441,38cyclictest0-21swapper/020:10:020
124252799441,37cyclictest0-21swapper/023:10:020
124252799441,37cyclictest0-21swapper/023:10:020
124253299435,18cyclictest30-21rcuc/220:45:012
1242530994329,9cyclictest0-21swapper/123:50:001
1242530994329,9cyclictest0-21swapper/123:50:001
1242530994329,10cyclictest231ktimers/122:50:111
1242530994325,9cyclictest0-21swapper/119:20:281
1242530994324,10cyclictest0-21swapper/120:00:281
1242527994337,3cyclictest0-21swapper/000:20:240
1242527994336,4cyclictest167350irq/118-8000000.ethernet-tx022:00:240
1242527994335,4cyclictest167350irq/118-8000000.ethernet-tx021:20:160
1242527994335,4cyclictest167350irq/118-8000000.ethernet-tx021:20:160
1242527994331,8cyclictest0-21swapper/019:10:280
124252799431,40cyclictest0-21swapper/021:45:150
124252799431,40cyclictest0-21swapper/019:40:190
1242532994229,9cyclictest0-21swapper/223:00:262
1242530994231,8cyclictest231ktimers/122:40:111
1242530994230,6cyclictest231ktimers/119:15:021
1242530994229,6cyclictest0-21swapper/119:30:221
1242530994226,10cyclictest0-21swapper/119:40:271
124252799421,38cyclictest1283018-21unixbench_singl23:00:280
124252799421,38cyclictest0-21swapper/022:40:150
124252799421,38cyclictest0-21swapper/019:55:240
124252799421,37cyclictest0-21swapper/021:20:000
124252799421,35cyclictest1255728-21latency_hist20:25:000
1242530994130,7cyclictest1287222-21unixbench_multi23:25:281
1242527994128,10cyclictest0-21swapper/021:00:010
124252799412,3cyclictest1295272-21/usr/sbin/munin00:15:190
124252799412,3cyclictest1273910-21fschecks_count22:10:200
124252799412,37cyclictest0-21swapper/019:15:040
124252799411,4cyclictest1245815-21meminfo19:25:220
124252799411,38cyclictest0-21swapper/022:45:280
124252799411,38cyclictest0-21swapper/020:45:270
124252799411,37cyclictest1271750-21tr21:55:260
124252799411,37cyclictest1271750-21tr21:55:260
124252799411,35cyclictest0-21swapper/000:05:030
1242532994022,11cyclictest0-21swapper/223:30:002
1242530994032,4cyclictest0-21swapper/121:40:011
1242530994030,6cyclictest1284671-21grep23:10:271
1242530994029,7cyclictest1274343-21grep22:10:281
1242530994029,6cyclictest1292278-21unixbench_multi23:55:291
1242530994028,6cyclictest231ktimers/121:45:121
1242530994027,9cyclictest0-21swapper/120:10:271
1242530994027,8cyclictest0-21swapper/100:00:311
1242530994023,8cyclictest0-21swapper/121:05:251
1242527994033,4cyclictest20850irq/208-8000000.ethernet21:40:020
1242527994033,4cyclictest0-21swapper/023:20:150
124252799402,3cyclictest1274719-21df22:15:180
1242527994022,13cyclictest131ktimers/020:00:120
124252799401,37cyclictest0-21swapper/023:45:190
124252799401,37cyclictest0-21swapper/023:45:190
124252799401,37cyclictest0-21swapper/022:25:230
124252799401,36cyclictest1266645-21grep21:25:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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