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2026-06-25 - 12:30

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 Thu Jun 25, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1153721620sleep1121650irq/29-eth0_g0_00:25:041
248921220sleep0121650irq/29-eth0_g0_21:37:030
121850ksoftirqd/1121650irq/29-eth0_g0_22:13:420
121800ksoftirqd/1121750irq/30-eth0_g0_22:07:121
123302620sleep0121650irq/29-eth0_g0_22:17:330
105882550sleep0121650irq/29-eth0_g0_00:23:160
105882550sleep0121650irq/29-eth0_g0_00:23:160
121540ksoftirqd/1121750irq/30-eth0_g0_22:22:501
257762530sleep1121750irq/30-eth0_g0_23:12:261
207192520chrt121650irq/29-eth0_g0_22:50:280
121510ksoftirqd/1121750irq/30-eth0_g0_23:44:031
121510ksoftirqd/1121750irq/30-eth0_g0_21:50:321
121510ksoftirqd/1121750irq/30-eth0_g0_21:50:321
121480ksoftirqd/1121750irq/30-eth0_g0_23:37:571
121480ksoftirqd/1121750irq/30-eth0_g0_22:55:181
6262470sleep0121650irq/29-eth0_g0_23:41:500
121470ksoftirqd/1121750irq/30-eth0_g0_22:45:491
121470ksoftirqd/1121750irq/30-eth0_g0_22:15:241
121470ksoftirqd/1121750irq/30-eth0_g0_21:24:211
299362460chrt121650irq/29-eth0_g0_21:16:120
197572460sleep0121650irq/29-eth0_g0_22:48:330
184992460sleep0121650irq/29-eth0_g0_22:43:100
121750460irq/30-eth0_g0_1219-21kworker/1:221:13:351
121460ksoftirqd/1121750irq/30-eth0_g0_22:40:071
121460ksoftirqd/1121750irq/30-eth0_g0_00:05:581
121750440irq/30-eth0_g0_1219-21kworker/1:223:08:071
121650440irq/29-eth0_g0_7551-21chrt21:58:420
121440ksoftirqd/1121650irq/29-eth0_g0_21:14:151
231362430sleep0121650irq/29-eth0_g0_23:00:100
121750430irq/30-eth0_g0_22920-21sed22:59:041
121750430irq/30-eth0_g0_121ksoftirqd/121:34:461
121650430irq/29-eth0_g0_1964-21runrttasks21:33:260
121650430irq/29-eth0_g0_13-21kworker/0:123:54:080
121430ksoftirqd/1121750irq/30-eth0_g0_23:11:210
121430ksoftirqd/1121650irq/29-eth0_g0_21:39:300
48132420sleep0121650irq/29-eth0_g0_21:45:350
3070799422cyclictest19862-21unixbench_multi20:34:031
121650420irq/29-eth0_g0_31042-21cat19:08:560
121650420irq/29-eth0_g0_31ksoftirqd/023:28:560
121650420irq/29-eth0_g0_31ksoftirqd/023:28:560
121420ksoftirqd/1121750irq/30-eth0_g0_22:29:500
121420ksoftirqd/1121650irq/29-eth0_g0_22:11:561
170992410sleep1121750irq/30-eth0_g0_22:36:061
121750410irq/30-eth0_g0_1219-21kworker/1:221:54:401
121750410irq/30-eth0_g0_121ksoftirqd/122:03:171
121750410irq/30-eth0_g0_121ksoftirqd/100:11:461
121650410irq/29-eth0_g0_30189-21unixbench_multi19:04:020
121650410irq/29-eth0_g0_31ksoftirqd/023:25:490
121650410irq/29-eth0_g0_1589-21unixbench_singl23:44:030
121650410irq/29-eth0_g0_13-21kworker/0:121:09:580
121650410irq/29-eth0_g0_13-21kworker/0:100:27:520
121410ksoftirqd/1121750irq/30-eth0_g0_00:08:530
121410ksoftirqd/1121650irq/29-eth0_g0_21:21:231
121410ksoftirqd/1121650irq/29-eth0_g0_00:32:541
293122400sleep1121750irq/30-eth0_g0_23:25:441
121750400irq/30-eth0_g0_1219-21kworker/1:200:34:101
121750400irq/30-eth0_g0_1219-21kworker/1:200:23:101
121750400irq/30-eth0_g0_1219-21kworker/1:200:23:101
121750400irq/30-eth0_g0_121ksoftirqd/123:32:071
121750400irq/30-eth0_g0_121ksoftirqd/123:32:071
121750400irq/30-eth0_g0_0-21swapper/123:54:371
121750400irq/30-eth0_g0_0-21swapper/100:15:031
121650400irq/29-eth0_g0_1964-21runrttasks19:38:160
121650400irq/29-eth0_g0_13-21kworker/0:121:26:550
121650400irq/29-eth0_g0_13-21kworker/0:100:03:030
121650400irq/29-eth0_g0_121ksoftirqd/100:34:020
121400ksoftirqd/1121750irq/30-eth0_g0_22:23:390
121400ksoftirqd/1121750irq/30-eth0_g0_21:48:450
121400ksoftirqd/1121750irq/30-eth0_g0_21:48:450
121400ksoftirqd/1121650irq/29-eth0_g0_23:18:511
121400ksoftirqd/1121650irq/29-eth0_g0_22:23:591
3070799391cyclictest26535-21grep21:03:431
3070799391cyclictest20246-21ntpdc22:49:001
121750390irq/30-eth0_g0_31ksoftirqd/000:18:170
121750390irq/30-eth0_g0_121ksoftirqd/121:39:141
121750390irq/30-eth0_g0_121ksoftirqd/100:01:511
121650390irq/29-eth0_g0_8252-21unixbench_multi21:59:050
121650390irq/29-eth0_g0_31ksoftirqd/021:03:430
121650390irq/29-eth0_g0_14352-21sed22:24:040
121650390irq/29-eth0_g0_13-21kworker/0:123:19:500
121650390irq/29-eth0_g0_13-21kworker/0:123:04:030
121650390irq/29-eth0_g0_13-21kworker/0:122:56:110
121650390irq/29-eth0_g0_13-21kworker/0:100:04:470
121650390irq/29-eth0_g0_121ksoftirqd/122:05:190
121390ksoftirqd/1121750irq/30-eth0_g0_23:49:190
121390ksoftirqd/1121750irq/30-eth0_g0_22:34:480
121390ksoftirqd/1121750irq/30-eth0_g0_21:20:300
121390ksoftirqd/1121750irq/30-eth0_g0_20:13:070
121390ksoftirqd/1121750irq/30-eth0_g0_20:07:470
121390ksoftirqd/1121750irq/30-eth0_g0_19:31:280
121390ksoftirqd/1121750irq/30-eth0_g0_19:31:280
121390ksoftirqd/1121750irq/30-eth0_g0_00:31:000
121390ksoftirqd/1121650irq/29-eth0_g0_23:14:041
121390ksoftirqd/1121650irq/29-eth0_g0_19:51:241
3070799381cyclictest16053-21processes20:19:021
121750380irq/30-eth0_g0_121ksoftirqd/123:41:301
121650380irq/29-eth0_g0_95872sleep019:53:550
121650380irq/29-eth0_g0_30418-21runrttasks19:05:301
121650380irq/29-eth0_g0_31ksoftirqd/023:36:190
121650380irq/29-eth0_g0_1964-21runrttasks20:55:200
121650380irq/29-eth0_g0_1964-21runrttasks20:46:110
121650380irq/29-eth0_g0_1964-21runrttasks20:46:110
121650380irq/29-eth0_g0_1964-21runrttasks20:23:280
121650380irq/29-eth0_g0_1964-21runrttasks19:18:410
121380ksoftirqd/1121750irq/30-eth0_g0_23:15:540
121380ksoftirqd/1121650irq/29-eth0_g0_20:53:561
121380ksoftirqd/1121650irq/29-eth0_g0_19:41:251
121380ksoftirqd/1121650irq/29-eth0_g0_19:22:021
3070799372cyclictest27241-21grep21:04:031
3070799371cyclictest31125-21seq19:08:571
3070799371cyclictest15354-21ntp_kernel_pll_22:28:591
3070799371cyclictest14863-21sendmail_mailst20:14:031
3070799371cyclictest12420-21sendmail_mailtr20:04:011
121750370irq/30-eth0_g0_121ksoftirqd/121:30:021
121750370irq/30-eth0_g0_0-21swapper/121:47:201
121650370irq/29-eth0_g0_8512-21ls19:48:580
121650370irq/29-eth0_g0_6336-21ls19:39:020
121650370irq/29-eth0_g0_1964-21runrttasks19:46:050
121370ksoftirqd/14895-21ntp_kernel_pll_19:34:001
3070799362cyclictest2260-21if_eth019:23:551
3070799362cyclictest18050-21df20:28:541
3070799361cyclictest21667-21egrep20:43:541
3070799361cyclictest21667-21egrep20:43:541
3070799361cyclictest17150-21ntp_kernel_pll_20:23:571
121650360irq/29-eth0_g0_19911-21grep20:34:040
121650360irq/29-eth0_g0_1964-21runrttasks20:43:000
121650360irq/29-eth0_g0_1191-21ntpdc19:18:570
121650360irq/29-eth0_g0_11212-21/usr/sbin/munin19:59:020
121360ksoftirqd/111211-21chrt19:59:021
3070799351cyclictest7252sleep119:18:421
3070799351cyclictest3915-21unixbench_multi19:29:041
3070799351cyclictest3915-21unixbench_multi19:29:041
3070799351cyclictest20498-21df20:38:541
121750350irq/30-eth0_g0_1964-21runrttasks20:27:110
121650350irq/29-eth0_g0_2704-21unixbench_multi19:24:020
121650350irq/29-eth0_g0_26949-21ntpdc21:03:580
121650350irq/29-eth0_g0_0-21swapper/020:48:530
3070799341cyclictest2686-21awk23:49:021
3070799341cyclictest23006-21df_abs20:48:541
121650340irq/29-eth0_g0_14620-21wc20:13:580
121750330irq/30-eth0_g0_7186-21interrupts19:43:551
121650330irq/29-eth0_g0_0-21swapper/020:29:010
30707993217cyclictest10099-21head19:54:031
3070799321cyclictest0-21swapper/120:10:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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