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2026-06-19 - 11:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #5

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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  Eltec
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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 highest latencies:
System rack3slot5s.osadl.org (updated Fri Jun 19, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1837421450sleep1121650irq/29-eth0_g0_23:10:411
678021200sleep0121750irq/30-eth0_g0_00:35:080
1119121010sleep1121650irq/29-eth0_g0_22:42:451
72652740sleep0121650irq/29-eth0_g0_20:14:110
121610ksoftirqd/1121650irq/29-eth0_g0_20:36:110
121580ksoftirqd/1121650irq/29-eth0_g0_20:11:010
23333995633cyclictest0-21swapper/021:40:530
23333995633cyclictest0-21swapper/021:40:530
209012560sleep0121650irq/29-eth0_g0_23:21:280
2333499551cyclictest1964-21runrttasks23:23:271
121540ksoftirqd/1121650irq/29-eth0_g0_22:00:011
2333399535cyclictest121650irq/29-eth0_g0_22:57:530
2333399524cyclictest121650irq/29-eth0_g0_20:51:490
121520ksoftirqd/1121750irq/30-eth0_g0_20:54:251
2333499512cyclictest24289-21chrt23:34:191
2333499502cyclictest246042sleep121:24:171
2333399506cyclictest26355-21runrttasks21:31:530
2333499492cyclictest1219-21kworker/1:222:27:291
2333499491cyclictest23064-21df21:19:081
2333399493cyclictest121650irq/29-eth0_g0_21:05:330
159652490sleep1121750irq/30-eth0_g0_23:01:121
121490ksoftirqd/1121750irq/30-eth0_g0_21:28:581
2333499481cyclictest32224-21unixbench_singl21:54:201
2333499481cyclictest11337-21unixbench_singl20:29:181
2333399487cyclictest121650irq/29-eth0_g0_23:59:140
2333399486cyclictest0-21swapper/021:21:470
2333399482cyclictest24300-21grep23:34:190
2333499472cyclictest323582chrt19:44:111
2333499472cyclictest323582chrt19:44:111
2333499471cyclictest25551-21grep23:39:191
2333499471cyclictest21107-21unixbench_multi21:09:191
2333499471cyclictest15851-21seq20:49:121
2333399471cyclictest4880-21df_abs00:29:070
2333499466cyclictest1219-21kworker/1:223:57:471
2333499462cyclictest22107-21ntp_states21:14:141
2333499461cyclictest8348-21grep22:29:191
2333499461cyclictest31215-21taskset00:04:101
2333499461cyclictest284462sleep121:39:171
2333499461cyclictest284462sleep121:39:171
2333499461cyclictest26529-21taskset23:44:161
2333499461cyclictest22821-21awk23:29:141
2333499461cyclictest2215-21grep22:04:181
2333499461cyclictest1964-21runrttasks21:34:471
2333499461cyclictest19394-21grep23:14:191
2333499461cyclictest16821-21ps23:04:181
2333399462cyclictest0-21swapper/022:17:530
2333399461cyclictest21576-21netstat23:24:120
2333399461cyclictest10825-21unixbench_singl22:39:180
121460ksoftirqd/1121750irq/30-eth0_g0_19:55:521
2333499452cyclictest32388-21df00:09:081
2333499452cyclictest128432sleep122:49:101
2333499452cyclictest128432sleep122:49:101
2333499451cyclictest5218-21seq00:29:141
2333499451cyclictest29780-21head21:44:191
2333499451cyclictest24008-21ls19:09:171
2333499451cyclictest18179-21chrt20:59:091
2333499451cyclictest14358-21taskset22:54:181
2333499451cyclictest1219-21kworker/1:200:28:561
2333399459cyclictest8935-21/usr/sbin/munin22:34:170
2333399456cyclictest121650irq/29-eth0_g0_23:39:500
2333399456cyclictest0-21swapper/021:24:100
2333399452cyclictest121650irq/29-eth0_g0_20:25:350
23333994512cyclictest30795-21/usr/sbin/munin19:39:180
23333994512cyclictest30795-21/usr/sbin/munin19:39:180
2333399451cyclictest13343-21iostat20:39:090
121450ksoftirqd/1121750irq/30-eth0_g0_23:29:590
2333499442cyclictest9896-21proc_pri20:24:151
2333499442cyclictest5178-21unixbench_multi20:04:191
2333499441cyclictest7103-21sed20:14:081
2333499441cyclictest6821-21runrttasks00:35:361
2333499441cyclictest4710-21grep22:14:191
2333499441cyclictest3910-21taskset19:59:161
2333499441cyclictest31293-21taskset21:52:141
2333399449cyclictest18513-21runrttasks23:12:170
2333399442cyclictest121650irq/29-eth0_g0_20:29:140
2333399442cyclictest0-21swapper/023:04:000
23333994416cyclictest25880-21/usr/sbin/munin19:19:170
2333399441cyclictest1964-21runrttasks19:46:430
2333399441cyclictest1964-21runrttasks19:46:430
2333399441cyclictest0-21swapper/022:28:510
14582440sleep0121650irq/29-eth0_g0_00:14:160
121440ksoftirqd/12333399cyclictest22:49:400
121440ksoftirqd/12333399cyclictest22:49:400
121440ksoftirqd/12333399cyclictest22:13:020
121440ksoftirqd/12333399cyclictest22:06:030
121440ksoftirqd/12333399cyclictest21:16:150
23334994328cyclictest8582-21awk20:19:121
2333499432cyclictest30947-21/usr/sbin/munin19:39:081
2333499432cyclictest30947-21/usr/sbin/munin19:39:081
2333499432cyclictest19572sleep100:16:111
2333499431cyclictest284042sleep119:29:081
2333499431cyclictest27755-21grep19:24:171
2333499431cyclictest2683-21/usr/sbin/munin00:19:151
2333499431cyclictest24778-21/usr/sbin/munin19:14:091
2333499431cyclictest1349-21fgrep19:49:151
2333499431cyclictest1349-21fgrep19:49:151
2333499431cyclictest13348-21/usr/sbin/munin20:39:091
2333499431cyclictest1219-21kworker/1:222:44:061
2333399439cyclictest30860-21awk21:49:150
2333399439cyclictest27487-21runrttasks21:35:470
2333399438cyclictest0-21swapper/019:09:110
2333399437cyclictest31ksoftirqd/022:01:370
2333399432cyclictest1964-21runrttasks19:55:190
2333399432cyclictest16071-21runrttasks23:02:240
2333399432cyclictest13-21kworker/0:121:57:340
23333994316cyclictest4518-21/usr/sbin/munin20:04:080
23333994314cyclictest3525-21/usr/sbin/munin00:24:110
121430ksoftirqd/12333399cyclictest22:48:480
2333499422cyclictest30870-21runrttasks00:03:101
2333499421cyclictest53352sleep122:19:091
2333499421cyclictest21840-21unixbench_multi23:24:181
2333499421cyclictest120622sleep120:34:101
2333399427cyclictest27489-21df_abs23:49:090
2333399422cyclictest32503-21latency00:09:110
2333399422cyclictest1964-21runrttasks19:27:250
23333994212cyclictest14993-21grep20:44:200
2333399421cyclictest25189-21wc19:14:170
2333399421cyclictest1983-21/usr/sbin/munin23:44:080
2333399421cyclictest121650irq/29-eth0_g0_20:19:170
2333399421cyclictest0-21swapper/021:02:530
121650420irq/29-eth0_g0_1964-21runrttasks19:08:080
2333499412cyclictest19629-21ntp_kernel_err21:04:131
2333499411cyclictest29723-21df19:34:081
2333499411cyclictest283852sleep123:52:481
2333499411cyclictest267772sleep119:21:081
2333499411cyclictest14662-21cat20:44:131
2333399418cyclictest13-21kworker/0:122:29:180
2333399413cyclictest13-21kworker/0:121:09:190
23333994115cyclictest5253-21/usr/sbin/munin22:19:190
23333994114cyclictest3387-21df_abs19:59:070
23333994111cyclictest29079-21/usr/sbin/munin21:44:100
2333399411cyclictest28578-21/usr/sbin/munin23:54:160
2333399411cyclictest17235-21chrt20:54:160
2333499402cyclictest5740-21taskset20:09:041
2333499402cyclictest1219-21kworker/1:222:09:301
2333399408cyclictest28976-21unixbench_multi19:29:200
2333399402cyclictest1964-21runrttasks19:38:140
23333994011cyclictest2389-21df_abs00:19:100
23333994011cyclictest13-21kworker/0:123:18:100
2333499391cyclictest91482sleep122:34:121
23333993912cyclictest31032-21cpu00:04:080
2333399381cyclictest1459-21unixbench_multi19:49:170
2333399381cyclictest1459-21unixbench_multi19:49:170
121650370irq/29-eth0_g0_23218-21runrttasks19:07:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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