OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

Click here to display the system's profile data or here to proceed to next system.

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, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot5s.osadl.org (updated Wed Sep 16, 2026 12:44:43)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3709981	99	56	49,5	cyclictest	3767442	-21	kworker/u8:2+events_unbound	10:28:02	3
3709978	99	56	48,6	cyclictest	3756777	-21	kworker/u8:0+events_unbound	09:32:53	2
3709969	99	55	48,5	cyclictest	3801864	-21	kworker/u8:0+events_unbound	11:38:22	0
3709978	99	52	42,6	cyclictest	3762109	-21	idleruntime-cro	09:40:00	2
3709969	99	51	45,4	cyclictest	3749744	-21	kworker/u8:1+events_unbound	09:12:50	0
3709969	99	48	41,4	cyclictest	3715618	-21	cron	07:25:01	0
3709969	99	47	41,4	cyclictest	3823991	-21	kworker/u8:0+events_unbound	12:38:31	0
3709978	99	46	39,5	cyclictest	3741108	-21	kworker/u8:0+events_unbound	08:57:49	2
3709974	99	46	38,5	cyclictest	438	-21	cron	10:10:01	1
3709978	99	45	39,4	cyclictest	3781220	-21	kworker/u8:0+events_unbound	10:38:05	2
3709978	99	44	38,4	cyclictest	3765886	-21	fschecks_count	09:50:15	2
3709969	99	44	38,4	cyclictest	3806813	-21	kworker/u8:2+events_unbound	12:08:26	0
3709969	99	44	37,5	cyclictest	3754974	-21	kworker/u8:2+events_unbound	09:27:51	0
3709969	99	44	32,8	cyclictest	3773577	-21	grep	10:10:25	0
3709969	99	44	32,8	cyclictest	3773577	-21	grep	10:10:25	0
3709969	99	42	35,5	cyclictest	3707936	-21	kworker/u8:0+events_unbound	07:27:38	0
3709981	99	41	34,4	cyclictest	3746528	-21	cron	08:55:01	3
3709981	99	41	32,6	cyclictest	3719017	-21	cron	07:35:01	3
3709978	99	41	35,4	cyclictest	3730962	-21	kworker/u8:1+events_unbound	08:07:43	2
3709969	99	41	33,5	cyclictest	12	1	ktimers/0	07:50:10	0
3709969	99	41	29,9	cyclictest	3787672	-21	cron	10:55:00	0
3709978	99	40	34,4	cyclictest	3777424	-21	kworker/u8:0+events_unbound	10:25:20	2
3709978	99	40	32,4	cyclictest	3765522	-21	sh	09:50:00	2
3709974	99	40	33,4	cyclictest	3741419	-21	cron	08:40:01	1
3709969	99	40	34,4	cyclictest	3723978	-21	kworker/u8:0+events_unbound	07:57:42	0
3709969	99	40	29,7	cyclictest	3711122	-21	grep	07:10:27	0
3709981	99	39	29,4	cyclictest	3756777	-21	kworker/u8:0+events_unbound	09:42:55	3
3709978	99	39	31,4	cyclictest	0	-21	swapper/2	11:55:00	2
3709978	99	39	26,9	cyclictest	31	1	ktimers/2	12:35:13	2
3709974	99	39	26,10	cyclictest	23	1	ktimers/1	09:10:16	1
3709969	99	39	33,4	cyclictest	3721213	-21	kworker/u8:2+events_unbound	07:42:39	0
3709969	99	39	31,4	cyclictest	0	-21	swapper/0	11:35:01	0
3709969	99	39	26,4	cyclictest	13	1	rcu_preempt	08:53:22	0
3709969	99	39	18,5	cyclictest	13	1	rcu_preempt	11:50:00	0
3709969	99	39	13,6	cyclictest	13	1	rcu_preempt	12:25:19	0
3709981	99	38	27,7	cyclictest	3765516	-21	sh	09:50:01	3
3709978	99	38	32,4	cyclictest	3717167	-21	kworker/u8:1+events_unbound	07:32:38	2
3709978	99	38	19,6	cyclictest	3732689	-21	kworker/u8:2+events_unbound	08:18:28	2
3709969	99	38	32,4	cyclictest	3801864	-21	kworker/u8:0+events_unbound	11:43:22	0
3709969	99	38	22,4	cyclictest	13	1	rcu_preempt	09:38:53	0
3709981	99	37	28,6	cyclictest	0	-21	swapper/3	11:40:01	3
3709981	99	37	27,6	cyclictest	3796410	-21	cron	11:19:59	3
3709981	99	37	25,7	cyclictest	0	-21	swapper/3	07:47:38	3
3709978	99	37	31,4	cyclictest	3817500	-21	kworker/u8:2+events_unbound	12:25:21	2
3709978	99	37	25,8	cyclictest	0	-21	swapper/2	08:00:00	2
3709974	99	37	30,4	cyclictest	0	-21	swapper/1	12:00:01	1
3709974	99	37	13,11	cyclictest	13	1	rcu_preempt	07:37:40	1
3709969	99	37	30,4	cyclictest	3755285	-21	munin-plugin-st	09:20:01	0
3709969	99	37	29,4	cyclictest	0	-21	swapper/0	12:25:01	0
3709969	99	37	22,9	cyclictest	13	1	rcu_preempt	07:37:21	0
3709981	99	36	28,4	cyclictest	0	-21	swapper/3	11:00:00	3
3709981	99	36	24,8	cyclictest	0	-21	swapper/3	07:10:22	3
3709978	99	36	29,4	cyclictest	3765481	-21	kworker/u8:0+events_unbound	10:02:59	2
3709978	99	36	26,6	cyclictest	0	-21	swapper/2	12:20:00	2
3709974	99	36	27,7	cyclictest	3781220	-21	kworker/u8:0+events_unbound	11:23:18	1
3709974	99	36	24,9	cyclictest	23	1	ktimers/1	09:55:12	1
3709974	99	36	1,4	cyclictest	13	1	rcu_preempt	11:10:12	1
3709969	99	36	28,6	cyclictest	3814045	-21	kworker/u8:0+events_unbound	12:13:28	0
3709969	99	36	28,4	cyclictest	0	-21	swapper/0	11:20:25	0
3709969	99	36	27,7	cyclictest	3794388	-21	kworker/u8:2+events_unbound	11:29:41	0
3709969	99	36	23,4	cyclictest	13	1	rcu_preempt	09:20:40	0
3709969	99	36	16,5	cyclictest	13	1	rcu_preempt	10:20:24	0
3709981	99	35	25,7	cyclictest	3727784	-21	sendmail	08:00:01	3
3709978	99	35	29,4	cyclictest	3808554	-21	kworker/u8:1+events_unbound	11:58:24	2
3709978	99	35	28,5	cyclictest	3749744	-21	kworker/u8:1+events_unbound	09:05:20	2
3709978	99	35	27,4	cyclictest	0	-21	swapper/2	07:10:18	2
3709978	99	35	18,6	cyclictest	3806813	-21	kworker/u8:2+events_unbound	12:09:25	2
3709974	99	35	26,6	cyclictest	3824357	-21	sendmail	12:40:00	1
3709974	99	35	26,6	cyclictest	0	-21	swapper/1	09:20:00	1
3709974	99	35	25,6	cyclictest	0	-21	swapper/1	11:00:01	1
3709969	99	35	7,21	cyclictest	11	-21	ksoftirqd/0	11:00:02	0
3709969	99	35	25,6	cyclictest	0	-21	swapper/0	10:25:24	0
3709969	99	35	21,5	cyclictest	13	1	rcu_preempt	11:54:13	0
3709969	99	35	19,5	cyclictest	13	1	rcu_preempt	11:00:22	0
3709969	99	35	19,5	cyclictest	13	1	rcu_preempt	08:35:19	0
3709969	99	35	18,4	cyclictest	13	1	rcu_preempt	11:05:56	0
3709969	99	35	18,4	cyclictest	13	1	rcu_preempt	07:33:02	0
3709981	99	34	28,4	cyclictest	3749744	-21	kworker/u8:1+events_unbound	09:17:51	3
3709981	99	34	26,5	cyclictest	3715636	-21	munin-plugin-st	07:25:01	3
3709981	99	34	26,5	cyclictest	0	-21	swapper/3	07:20:00	3
3709981	99	34	22,4	cyclictest	3754974	-21	kworker/u8:2+events_unbound	09:20:36	3
3709978	99	34	28,4	cyclictest	3812091	-21	kworker/u8:1+events_unbound	12:04:40	2
3709978	99	34	28,4	cyclictest	3775608	-21	kworker/u8:1+events_unbound	10:24:41	2
3709978	99	34	26,5	cyclictest	0	-21	swapper/2	08:35:01	2
3709978	99	34	25,6	cyclictest	0	-21	swapper/2	11:05:16	2
3709974	99	34	28,4	cyclictest	3721213	-21	kworker/u8:2+events_unbound	07:40:23	1
3709969	99	34	27,5	cyclictest	3723978	-21	kworker/u8:0+events_unbound	08:14:40	0
3709969	99	34	25,4	cyclictest	13	1	rcu_preempt	10:43:06	0
3709969	99	34	23,7	cyclictest	0	-21	swapper/0	12:05:00	0
3709969	99	34	22,8	cyclictest	12	1	ktimers/0	08:00:25	0
3709969	99	34	21,10	cyclictest	12	1	ktimers/0	10:05:12	0
3709969	99	34	20,4	cyclictest	13	1	rcu_preempt	08:09:30	0
3709969	99	34	15,5	cyclictest	13	1	rcu_preempt	08:35:01	0
3709969	99	34	14,5	cyclictest	13	1	rcu_preempt	08:25:02	0
3709969	99	34	10,12	cyclictest	11	-21	ksoftirqd/0	07:15:04	0
3709981	99	33	26,5	cyclictest	3792670	-21	kworker/u8:1+events_unbound	11:08:35	3
3709981	99	33	26,4	cyclictest	0	-21	swapper/3	12:15:13	3
3709981	99	33	26,4	cyclictest	0	-21	swapper/3	10:00:24	3
3709978	99	33	27,4	cyclictest	3814045	-21	kworker/u8:0+events_unbound	12:10:36	2
3709978	99	33	27,4	cyclictest	3707936	-21	kworker/u8:0+events_unbound	07:17:36	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17