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2026-09-06 - 10:04

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Sep 06, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2227621620sleep1121750irq/30-eth0_g0_23:00:451
1211080ksoftirqd/1121750irq/30-eth0_g0_19:26:091
1306821070sleep0121650irq/29-eth0_g0_00:34:500
121950ksoftirqd/1121750irq/30-eth0_g0_20:36:421
311202710sleep1121750irq/30-eth0_g0_23:35:581
110762680chrt121750irq/30-eth0_g0_22:13:391
323322660sleep1121750irq/30-eth0_g0_21:27:021
121650ksoftirqd/1298142sleep019:06:010
121610ksoftirqd/1121750irq/30-eth0_g0_21:21:570
70222600sleep1121750irq/30-eth0_g0_00:10:461
164622600sleep1121750irq/30-eth0_g0_20:22:501
93962590sleep0121650irq/29-eth0_g0_00:19:500
84732570sleep1121750irq/30-eth0_g0_19:51:021
121550ksoftirqd/1121750irq/30-eth0_g0_21:56:161
305352540sleep0121650irq/29-eth0_g0_23:31:530
34472510sleep0121650irq/29-eth0_g0_23:55:580
121500ksoftirqd/1121750irq/30-eth0_g0_00:21:561
121490ksoftirqd/1121750irq/30-eth0_g0_22:27:311
121480ksoftirqd/1121750irq/30-eth0_g0_22:40:381
35672470sleep0121750irq/30-eth0_g0_21:41:470
121650470irq/29-eth0_g0_18332-21chrt20:31:030
121470ksoftirqd/1121750irq/30-eth0_g0_22:39:580
18672460sleep1121650irq/29-eth0_g0_23:47:561
121750460irq/30-eth0_g0_121ksoftirqd/123:05:591
121460ksoftirqd/1121650irq/29-eth0_g0_21:58:020
121750450irq/30-eth0_g0_121ksoftirqd/123:43:381
121450ksoftirqd/1121750irq/30-eth0_g0_21:48:111
121750440irq/30-eth0_g0_1219-21kworker/1:222:06:031
121650440irq/29-eth0_g0_1964-21runrttasks23:52:210
121650440irq/29-eth0_g0_13-21kworker/0:121:30:160
121650440irq/29-eth0_g0_121ksoftirqd/121:41:031
121440ksoftirqd/1121750irq/30-eth0_g0_00:08:560
121750430irq/30-eth0_g0_1219-21kworker/1:221:34:231
121650430irq/29-eth0_g0_9615-21head22:06:110
121650430irq/29-eth0_g0_31ksoftirqd/021:36:400
121430ksoftirqd/1121650irq/29-eth0_g0_21:36:041
121430ksoftirqd/1121650irq/29-eth0_g0_21:35:020
121750420irq/30-eth0_g0_121ksoftirqd/100:03:221
121650420irq/29-eth0_g0_31ksoftirqd/021:46:300
121650420irq/29-eth0_g0_31ksoftirqd/000:00:590
121650420irq/29-eth0_g0_14323-21latency_hist20:15:470
121420ksoftirqd/1121750irq/30-eth0_g0_22:59:060
121420ksoftirqd/1121650irq/29-eth0_g0_23:32:331
121750410irq/30-eth0_g0_1219-21kworker/1:223:25:051
121750410irq/30-eth0_g0_121ksoftirqd/121:12:321
121650410irq/29-eth0_g0_31ksoftirqd/023:16:000
121650410irq/29-eth0_g0_31ksoftirqd/022:53:360
121650410irq/29-eth0_g0_13-21kworker/0:123:50:320
121650410irq/29-eth0_g0_121ksoftirqd/122:01:210
2953199401cyclictest4083-21unixbench_multi23:56:111
2953199401cyclictest1078-21taskset19:21:011
121750400irq/30-eth0_g0_1219-21kworker/1:223:17:241
121750400irq/30-eth0_g0_1219-21kworker/1:200:31:451
121650400irq/29-eth0_g0_31ksoftirqd/023:21:070
121650400irq/29-eth0_g0_31ksoftirqd/023:04:520
121650400irq/29-eth0_g0_31ksoftirqd/021:55:030
121650400irq/29-eth0_g0_15877-21load20:21:030
121650400irq/29-eth0_g0_13-21kworker/0:122:24:180
121650400irq/29-eth0_g0_13-21kworker/0:122:14:500
121650400irq/29-eth0_g0_121ksoftirqd/123:44:340
121650400irq/29-eth0_g0_121ksoftirqd/123:13:360
121400ksoftirqd/1121750irq/30-eth0_g0_19:31:050
121400ksoftirqd/1121750irq/30-eth0_g0_19:31:050
121400ksoftirqd/1121650irq/29-eth0_g0_22:01:071
29531993934cyclictest18002-21grep20:30:471
2953199391cyclictest26527-21diskmemload22:25:231
2953199391cyclictest2600-21seq23:51:031
121750390irq/30-eth0_g0_121ksoftirqd/123:04:091
121750390irq/30-eth0_g0_121ksoftirqd/121:08:321
121650390irq/29-eth0_g0_1964-21runrttasks19:26:470
121650390irq/29-eth0_g0_13-21kworker/0:122:40:500
121650390irq/29-eth0_g0_13-21kworker/0:122:32:560
121650390irq/29-eth0_g0_13-21kworker/0:121:20:240
121650390irq/29-eth0_g0_13-21kworker/0:121:06:100
121650390irq/29-eth0_g0_13-21kworker/0:100:12:470
121390ksoftirqd/1121750irq/30-eth0_g0_19:40:120
2953199382cyclictest3563-21iostat19:31:021
2953199382cyclictest3563-21iostat19:31:021
2953199381cyclictest30721-21/usr/sbin/munin21:21:051
2953199381cyclictest25287-21proc_pri23:11:061
121750380irq/30-eth0_g0_5788-21sendmail_mailtr21:51:091
121750380irq/30-eth0_g0_28787-21/usr/sbin/munin19:01:041
121750380irq/30-eth0_g0_121ksoftirqd/122:52:081
121650380irq/29-eth0_g0_1964-21runrttasks23:37:100
121650380irq/29-eth0_g0_13-21kworker/0:123:26:510
121650380irq/29-eth0_g0_13-21kworker/0:122:26:390
121650380irq/29-eth0_g0_13-21kworker/0:122:18:490
121650380irq/29-eth0_g0_13-21kworker/0:121:12:330
121650380irq/29-eth0_g0_121ksoftirqd/122:16:021
121650380irq/29-eth0_g0_121ksoftirqd/121:19:251
121380ksoftirqd/1121650irq/29-eth0_g0_19:15:371
2953199371cyclictest29770-21df_abs19:06:001
2953199371cyclictest28800-21load23:26:001
2953199371cyclictest19287-21cat22:46:131
2953199371cyclictest19287-21cat22:46:131
121750370irq/30-eth0_g0_2953199cyclictest20:05:591
121750370irq/30-eth0_g0_2953199cyclictest20:05:591
121750370irq/30-eth0_g0_1219-21kworker/1:222:45:341
121750370irq/30-eth0_g0_1219-21kworker/1:200:26:131
121650370irq/29-eth0_g0_8630-21taskset19:51:050
121650370irq/29-eth0_g0_28658-21latency19:01:020
121650370irq/29-eth0_g0_22907-21latency_hist20:50:480
121650370irq/29-eth0_g0_1964-21runrttasks00:26:040
121650370irq/29-eth0_g0_13-21kworker/0:122:48:140
121650370irq/29-eth0_g0_13-21kworker/0:122:48:140
121650370irq/29-eth0_g0_0-21swapper/023:06:280
121370ksoftirqd/18329-21taskset00:15:471
2953199362cyclictest22903-21latency_hist20:50:481
2953199361cyclictest32619-21awk19:16:081
2953199361cyclictest24806-21sed20:56:081
121750360irq/30-eth0_g0_1964-21runrttasks21:01:351
121750360irq/30-eth0_g0_1219-21kworker/1:222:31:311
121650360irq/29-eth0_g0_7261-21taskset19:46:030
121650360irq/29-eth0_g0_19819-21mailstats20:36:070
121650360irq/29-eth0_g0_1964-21runrttasks20:29:510
121650360irq/29-eth0_g0_1964-21runrttasks19:55:530
121650360irq/29-eth0_g0_1964-21runrttasks19:22:320
121650360irq/29-eth0_g0_1964-21runrttasks19:16:130
121650360irq/29-eth0_g0_11818-21chrt20:05:470
121360ksoftirqd/1121750irq/30-eth0_g0_00:22:110
2953199357cyclictest121750irq/30-eth0_g0_00:11:021
2953199351cyclictest9752-21taskset19:56:021
2953199351cyclictest23670-21awk20:51:081
121650350irq/29-eth0_g0_25446-21cpu21:01:000
121650350irq/29-eth0_g0_24841-21unixbench_singl20:56:080
121650350irq/29-eth0_g0_23002-21df20:50:570
121650350irq/29-eth0_g0_2109-21lldpd19:42:460
121650350irq/29-eth0_g0_1964-21runrttasks20:07:320
121650350irq/29-eth0_g0_1964-21runrttasks20:07:320
121650350irq/29-eth0_g0_1964-21runrttasks19:13:330
121650350irq/29-eth0_g0_14996-21unixbench_multi20:16:080
121350ksoftirqd/1121650irq/29-eth0_g0_20:16:081
2953199341cyclictest76292sleep119:46:091
2953199341cyclictest5695-21cat19:40:471
2953199341cyclictest18730-21unixbench_singl20:31:091
2953199341cyclictest13266-21df20:11:001
2953199330cyclictest0-21swapper/119:44:191
121750330irq/30-eth0_g0_1964-21runrttasks20:42:091
121650320irq/29-eth0_g0_20638-21df_inode20:40:580
2953199311cyclictest0-21swapper/120:01:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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