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2025-12-17 - 08:43

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 Tue Dec 16, 2025 13:37:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1328021520sleep1121550irq/30-eth0_g0_10:57:471
122192630sleep0121450irq/29-eth0_g0_10:54:430
290422610sleep1121550irq/30-eth0_g0_12:02:411
305902550sleep1121450irq/29-eth0_g0_12:09:221
236582550chrt121550irq/30-eth0_g0_07:17:341
121550540irq/30-eth0_g0_2183699cyclictest08:29:311
121550520irq/30-eth0_g0_2183699cyclictest12:14:451
121550520irq/30-eth0_g0_2183699cyclictest09:37:311
121520ksoftirqd/1121550irq/30-eth0_g0_12:17:401
121550510irq/30-eth0_g0_2183699cyclictest08:37:401
121450510irq/29-eth0_g0_2183699cyclictest09:02:421
264222490sleep0121550irq/30-eth0_g0_09:41:030
121550490irq/30-eth0_g0_2183699cyclictest08:47:311
121550480irq/30-eth0_g0_2183699cyclictest11:12:321
121450480irq/29-eth0_g0_16929-21sed11:12:420
121480ksoftirqd/12183699cyclictest07:57:331
2183699479cyclictest1941-21runrttasks11:50:551
121550470irq/30-eth0_g0_2183699cyclictest11:37:361
121550470irq/30-eth0_g0_11305-21sshd10:52:261
121450470irq/29-eth0_g0_2183699cyclictest09:42:341
121450470irq/29-eth0_g0_2183699cyclictest09:32:531
121470ksoftirqd/1121550irq/30-eth0_g0_10:26:030
121470ksoftirqd/1121550irq/30-eth0_g0_10:26:030
121470ksoftirqd/1121550irq/30-eth0_g0_10:05:150
21836994632cyclictest1997-21/usr/sbin/munin08:02:321
2183699462cyclictest9159-21cat10:42:351
21836994618cyclictest5530-21356172.5684021
2183699461cyclictest20105-21latency_hist09:14:521
2183699461cyclictest1941-21runrttasks11:43:581
2183699461cyclictest19380-21unixbench_singl11:22:411
2183699461cyclictest17902-21proc_pri11:17:361
121550460irq/30-eth0_g0_2183699cyclictest12:26:541
121550460irq/30-eth0_g0_21534-21sshd09:21:211
121450460irq/29-eth0_g0_9094-21irqstats10:42:330
121460ksoftirqd/12183699cyclictest07:42:381
71792450sleep0121450irq/29-eth0_g0_10:33:100
21836994532cyclictest8478-21runrttasks10:39:011
21836994515cyclictest25549-21cat07:24:531
2183699451cyclictest21587-21ps11:32:351
121550450irq/30-eth0_g0_2183699cyclictest11:06:321
121550450irq/30-eth0_g0_121ksoftirqd/109:54:121
121450450irq/29-eth0_g0_2183699cyclictest09:49:541
121450450irq/29-eth0_g0_13-21kworker/0:109:51:550
121450450irq/29-eth0_g0_0-21swapper/012:32:350
121450ksoftirqd/12183699cyclictest10:47:421
121450ksoftirqd/1121450irq/29-eth0_g0_11:55:581
2183699447cyclictest10218-21runrttasks08:34:071
2183699442cyclictest15500-21/usr/sbin/munin08:57:401
2183699442cyclictest15500-21/usr/sbin/munin08:57:401
21836994417cyclictest31528-21sed10:02:321
21836994417cyclictest22530-21ntp_offset07:12:381
21836994416cyclictest32194-21irqstats07:52:341
21836994416cyclictest31537-21runrttasks07:48:321
2183699441cyclictest44502chrt12:34:191
121450440irq/29-eth0_g0_2183699cyclictest10:07:411
121450440irq/29-eth0_g0_2183699cyclictest09:17:371
121450440irq/29-eth0_g0_1941-21runrttasks08:55:360
121450440irq/29-eth0_g0_1941-21runrttasks08:55:360
121450440irq/29-eth0_g0_1941-21runrttasks07:06:450
121440ksoftirqd/1121550irq/30-eth0_g0_12:21:361
121440ksoftirqd/1121550irq/30-eth0_g0_12:21:361
121440ksoftirqd/1121550irq/30-eth0_g0_10:20:331
121440ksoftirqd/1121550irq/30-eth0_g0_10:20:331
2183699433cyclictest0-21swapper/109:29:321
21836994312cyclictest4317-21taskset08:10:571
2183699431cyclictest27312-21chrt07:32:341
2183699431cyclictest1941-21runrttasks11:29:321
121550430irq/30-eth0_g0_4606-21df_abs08:12:320
121550430irq/30-eth0_g0_384-21unixbench_singl12:17:420
121550430irq/30-eth0_g0_121ksoftirqd/110:17:241
121450430irq/29-eth0_g0_2183699cyclictest10:10:531
121450430irq/29-eth0_g0_13-21kworker/0:112:09:100
121450430irq/29-eth0_g0_13-21kworker/0:111:19:450
121450430irq/29-eth0_g0_13-21kworker/0:110:04:250
121450430irq/29-eth0_g0_0-21swapper/009:07:310
121430ksoftirqd/1121550irq/30-eth0_g0_11:57:410
21836994218cyclictest0-21swapper/109:56:491
2183699421cyclictest6406-21/usr/sbin/munin10:32:341
2183699421cyclictest5645-21ps10:27:391
2183699421cyclictest5645-21ps10:27:391
2183699421cyclictest4153-21latency_hist08:09:531
2183699421cyclictest1941-21runrttasks11:48:531
2183699421cyclictest1941-21runrttasks11:02:041
121450420irq/29-eth0_g0_1941-21runrttasks07:40:520
121450420irq/29-eth0_g0_13-21kworker/0:111:33:540
121450420irq/29-eth0_g0_13-21kworker/0:110:20:500
121450420irq/29-eth0_g0_13-21kworker/0:110:20:500
121450420irq/29-eth0_g0_0-21swapper/008:29:530
2183699418cyclictest0-21swapper/108:22:361
2183699412cyclictest28160-21runrttasks07:36:101
21836994118cyclictest0-21swapper/108:19:091
21836994117cyclictest0-21swapper/108:52:341
21836994113cyclictest25822-21/usr/sbin/munin07:27:381
2183699411cyclictest11793-21runrttasks08:42:151
121550410irq/30-eth0_g0_1941-21runrttasks07:53:400
21836994017cyclictest0-21swapper/109:05:381
121550400irq/30-eth0_g0_3287-21swap10:17:410
121450400irq/29-eth0_g0_1960-21/usr/sbin/munin09:27:560
121450400irq/29-eth0_g0_13-21kworker/0:112:36:560
121450400irq/29-eth0_g0_13-21kworker/0:112:12:030
121450400irq/29-eth0_g0_13-21kworker/0:111:52:320
121450400irq/29-eth0_g0_13-21kworker/0:110:56:060
121450400irq/29-eth0_g0_13-21kworker/0:109:20:080
121450400irq/29-eth0_g0_0-21swapper/011:06:050
121550390irq/30-eth0_g0_28412-21df_abs07:37:320
121550390irq/30-eth0_g0_1941-21runrttasks08:45:040
121450390irq/29-eth0_g0_1941-21runrttasks08:23:220
121450390irq/29-eth0_g0_1941-21runrttasks07:10:570
121450390irq/29-eth0_g0_1799-21taskset12:23:570
121450390irq/29-eth0_g0_1799-21taskset12:23:570
121450390irq/29-eth0_g0_13-21kworker/0:111:48:440
121450390irq/29-eth0_g0_13-21kworker/0:111:20:380
121450390irq/29-eth0_g0_13-21kworker/0:111:03:500
121450390irq/29-eth0_g0_1183-21/usr/sbin/munin07:57:380
121450390irq/29-eth0_g0_0-21swapper/009:11:520
21836993815cyclictest21870-21ls07:09:531
121550380irq/30-eth0_g0_1941-21runrttasks10:38:030
121550380irq/30-eth0_g0_1941-21runrttasks09:56:310
121550380irq/30-eth0_g0_1941-21runrttasks09:31:280
121450380irq/29-eth0_g0_1941-21runrttasks08:19:370
121450380irq/29-eth0_g0_13-21kworker/0:110:14:060
121450380irq/29-eth0_g0_0-21swapper/010:45:500
121550370irq/30-eth0_g0_1941-21runrttasks08:36:550
121450370irq/29-eth0_g0_2847-21unixbench_multi12:27:410
121450370irq/29-eth0_g0_20608-21grep11:27:410
121450370irq/29-eth0_g0_13-21kworker/0:111:36:140
121450370irq/29-eth0_g0_0-21swapper/012:04:450
121450370irq/29-eth0_g0_0-21swapper/009:36:010
121450370irq/29-eth0_g0_0-21swapper/009:18:240
121450370irq/29-eth0_g0_0-21swapper/007:21:220
121550360irq/30-eth0_g0_31197-21grep07:47:380
121550360irq/30-eth0_g0_1941-21runrttasks08:05:530
121550360irq/30-eth0_g0_1941-21runrttasks07:31:090
121550360irq/30-eth0_g0_0-21swapper/011:42:370
121550360irq/30-eth0_g0_0-21swapper/009:02:370
121450360irq/29-eth0_g0_0-21swapper/008:32:340
121550350irq/30-eth0_g0_23894-21taskset07:17:390
121450350irq/29-eth0_g0_26106-21load07:27:350
121450350irq/29-eth0_g0_1941-21runrttasks08:01:310
121450350irq/29-eth0_g0_0-21swapper/008:52:360
121550340irq/30-eth0_g0_1941-21runrttasks08:40:410
121450340irq/29-eth0_g0_0-21swapper/009:45:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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