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2026-06-01 - 13:52

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 Mon Jun 01, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34321550sleep1121650irq/29-eth0_g0_09:42:451
322422760chrt121750irq/30-eth0_g0_11:52:010
156782750sleep1121750irq/30-eth0_g0_08:33:211
249142700sleep1121750irq/30-eth0_g0_09:09:561
89992690sleep0121650irq/29-eth0_g0_10:17:550
139172670sleep0121750irq/30-eth0_g0_10:38:010
259592620sleep0121750irq/30-eth0_g0_11:25:210
3422520sleep0121650irq/29-eth0_g0_09:42:440
121520ksoftirqd/1121750irq/30-eth0_g0_12:00:031
27343995114cyclictest1073-21proc_pri09:44:561
64632500sleep1121750irq/30-eth0_g0_07:54:551
2734399498cyclictest637-21sendmail_mailqu11:54:581
121650480irq/29-eth0_g0_26859-21unixbench_multi07:04:590
121480ksoftirqd/1121750irq/30-eth0_g0_10:53:591
121480ksoftirqd/1121750irq/30-eth0_g0_09:16:181
27343994724cyclictest11680-21unixbench_singl08:15:001
200012470sleep0121650irq/29-eth0_g0_11:02:260
121650470irq/29-eth0_g0_2734399cyclictest10:57:491
27343994619cyclictest14816-21unixbench_singl10:39:581
27343994617cyclictest0-21swapper/110:18:291
2734399461cyclictest71572sleep110:09:511
2734399461cyclictest124062sleep110:30:001
2734399461cyclictest124062sleep110:30:001
2734399461cyclictest1219-21kworker/1:207:49:491
121750460irq/30-eth0_g0_2734399cyclictest09:34:371
27343994525cyclictest0-21swapper/107:19:381
2734399452cyclictest9406-21taskset10:19:501
2734399452cyclictest8640-21munin-run12:29:381
2734399451cyclictest29509-21unixbench_multi11:39:581
2734399451cyclictest21326-21sendmail_mailqu08:54:581
121750450irq/30-eth0_g0_2734399cyclictest11:05:371
2734399444cyclictest19398-21runrttasks08:48:491
2734399443cyclictest9529-21runrttasks08:08:121
2734399443cyclictest32500-21runrttasks07:29:501
2734399443cyclictest277172sleep107:09:531
2734399443cyclictest10615-21unixbench_multi12:34:581
27343994420cyclictest5746-21grep12:14:581
2734399442cyclictest27873-21runrttasks09:22:221
2734399442cyclictest10388-21unixbench_multi08:09:581
27343994419cyclictest7352-21runrttasks07:59:481
27343994419cyclictest7352-21runrttasks07:59:481
2734399441cyclictest9820-21runrttasks12:34:061
2734399441cyclictest6185-21grep10:04:581
2734399441cyclictest4990-21latency_hist12:14:381
2734399441cyclictest16544-21grep08:34:591
121750440irq/30-eth0_g0_2734399cyclictest10:02:231
2734399434cyclictest3258-21runrttasks07:41:381
27343994324cyclictest12667-21proc_pri08:19:571
2734399432cyclictest31392-21/usr/sbin/munin11:49:481
2734399432cyclictest24384-21diskmemload11:19:511
2734399432cyclictest13524-21timerandwakeup10:34:591
27343994319cyclictest13971-21chrt08:24:581
27343994318cyclictest22039-21/usr/sbin/munin11:09:581
27343994316cyclictest289902sleep109:26:051
2734399431cyclictest4434-21runrttasks07:46:021
2734399431cyclictest30513-21unixbench_multi07:19:581
2734399431cyclictest25566-21ntp_kernel_err11:24:541
2734399431cyclictest1437-21missed_timers07:34:531
27343994221cyclictest1964-21runrttasks12:20:591
2734399422cyclictest28017-21awk11:34:511
2734399422cyclictest28017-21awk11:34:511
27343994219cyclictest19671-21sshd11:00:001
27343994218cyclictest32193-21sshd07:28:591
2734399421cyclictest2805-21if_eth012:04:511
2734399421cyclictest23312-21timerandwakeup11:14:571
2734399421cyclictest17739-21unixbench_multi08:39:581
121750420irq/30-eth0_g0_26849-21unixbench_multi07:04:591
121650420irq/29-eth0_g0_2734299cyclictest11:32:420
27343994117cyclictest0-21swapper/110:28:441
27343994117cyclictest0-21swapper/109:58:541
27343994117cyclictest0-21swapper/109:51:331
27343994117cyclictest0-21swapper/109:01:231
2734399411cyclictest26551-21df11:29:501
121750410irq/30-eth0_g0_2734399cyclictest10:44:451
2734399402cyclictest20547-21runrttasks08:52:551
27343994017cyclictest0-21swapper/111:49:171
27343994017cyclictest0-21swapper/109:35:531
2734399401cyclictest24064-21runrttasks09:05:581
268172400sleep0121750irq/30-eth0_g0_09:19:250
121650400irq/29-eth0_g0_2734299cyclictest11:59:080
121650370irq/29-eth0_g0_2734299cyclictest12:28:190
121650360irq/29-eth0_g0_2734299cyclictest11:09:380
121360ksoftirqd/1121650irq/29-eth0_g0_10:13:020
27342993417cyclictest6435-21/usr/sbin/munin12:19:500
121650340irq/29-eth0_g0_2734299cyclictest12:01:110
121650340irq/29-eth0_g0_2734299cyclictest08:19:170
2734299337cyclictest30512-21unixbench_multi07:19:580
2734299337cyclictest1964-21runrttasks08:10:570
2734299336cyclictest7557-21latency07:59:510
2734299336cyclictest7557-21latency07:59:510
27342993317cyclictest2598-21/usr/sbin/munin12:04:500
27342993312cyclictest121650irq/29-eth0_g0_08:24:580
2734299324cyclictest4159-21mailstats07:44:580
121650320irq/29-eth0_g0_2734299cyclictest08:49:540
2734299318cyclictest1964-21runrttasks12:38:140
2734299318cyclictest1964-21runrttasks09:46:450
2734299316cyclictest1964-21runrttasks10:05:020
2734299315cyclictest9413-21unixbench_singl12:29:580
2734299315cyclictest10934-21ps10:24:570
27342993128cyclictest0-21swapper/007:14:520
27342993117cyclictest4839-21/usr/sbin/munin07:49:530
27342993117cyclictest29030-21/usr/sbin/munin11:39:480
188842310sleep0121750irq/30-eth0_g0_10:58:440
121750310irq/30-eth0_g0_2734299cyclictest11:14:000
121650310irq/29-eth0_g0_2734299cyclictest09:29:490
121650310irq/29-eth0_g0_2734299cyclictest07:54:580
121310ksoftirqd/1121750irq/30-eth0_g0_08:22:570
2734299306cyclictest121650irq/29-eth0_g0_09:04:560
2734299305cyclictest1964-21runrttasks08:09:030
2734299305cyclictest121650irq/29-eth0_g0_11:34:570
2734299305cyclictest121650irq/29-eth0_g0_11:34:570
2734299305cyclictest0-21swapper/011:14:520
2734299304cyclictest22700-21head08:59:590
27342993016cyclictest16599-21/usr/sbin/munin10:49:520
121750300irq/30-eth0_g0_2734299cyclictest10:44:210
2734299298cyclictest23964-21/usr/sbin/munin11:19:510
2734299297cyclictest1964-21runrttasks08:57:390
2734299297cyclictest1964-21runrttasks07:31:310
2734299296cyclictest3178-21df09:54:510
2734299296cyclictest27493-21swap09:19:580
2734299296cyclictest25113-21unixbench_multi09:09:580
2734299296cyclictest18409-21df08:44:510
27342992916cyclictest31181-21/usr/sbin/munin07:24:490
27342992914cyclictest9431-21/usr/sbin/munin10:19:510
27342992914cyclictest0-21swapper/010:46:260
27342992914cyclictest0-21swapper/007:34:510
27342992912cyclictest121650irq/29-eth0_g0_10:29:590
27342992912cyclictest121650irq/29-eth0_g0_10:29:590
2734299285cyclictest30921-21missed_timers09:34:540
2734299285cyclictest15950-21/usr/sbin/munin08:34:490
2734299284cyclictest121650irq/29-eth0_g0_07:09:520
2734299282cyclictest31ksoftirqd/010:01:440
2734299282cyclictest0-21swapper/008:29:510
121750280irq/30-eth0_g0_2734299cyclictest09:49:580
2734299279cyclictest0-21swapper/012:09:580
2734299276cyclictest5602-21sendmail_mailtr12:14:570
2734299276cyclictest0-21swapper/007:44:380
2734299275cyclictest28635-21processes09:24:580
2734299273cyclictest17445-21sed08:39:520
121750270irq/30-eth0_g0_2734299cyclictest11:44:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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