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
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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 Tue Jan 27, 2026 00:44:53)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1649575	99	53	31,18	cyclictest	1674472	-21	sendmail	20:20:01	0
1649580	99	51	42,5	cyclictest	1719391	-21	ls	22:30:01	1
1649575	99	49	42,5	cyclictest	1622749	-21	kworker/u8:2+events_unbound	19:17:10	0
1649588	99	48	41,4	cyclictest	1664005	-21	idleruntime-cro	19:50:01	3
1649588	99	46	40,4	cyclictest	1702507	-21	kworker/u8:4+events_unbound	21:42:27	3
1649588	99	46	35,7	cyclictest	1743531	-21	apt-get	23:40:01	3
1649580	99	46	35,7	cyclictest	1724068	-21	grep	22:40:24	1
1649588	99	45	32,9	cyclictest	1720650	-21	grep	22:30:24	3
1649580	99	45	39,4	cyclictest	1735211	-21	kworker/u8:0+events_unbound	23:17:52	1
1649588	99	44	23,13	cyclictest	13	1	rcu_preempt	21:05:21	3
1649588	99	43	36,3	cyclictest	0	-21	swapper/3	00:20:00	3
1649588	99	43	35,4	cyclictest	0	-21	swapper/3	23:30:01	3
1649588	99	43	33,7	cyclictest	1741377	-21	grep	23:30:24	3
1649588	99	42	36,4	cyclictest	1731392	-21	kworker/u8:2+events_unbound	23:24:40	3
1649588	99	42	29,6	cyclictest	1712091	-21	grep	22:05:25	3
1649588	99	42	29,4	cyclictest	13	1	rcu_preempt	23:16:00	3
1649588	99	42	28,5	cyclictest	1622749	-21	kworker/u8:2+events_unbound	19:14:43	3
1649588	99	42	24,5	cyclictest	13	1	rcu_preempt	21:56:17	3
1649588	99	42	24,5	cyclictest	13	1	rcu_preempt	21:56:16	3
1649588	99	42	21,6	cyclictest	13	1	rcu_preempt	00:35:24	3
1649583	99	42	31,7	cyclictest	0	-21	swapper/2	20:50:00	2
1649580	99	42	28,5	cyclictest	1655007	-21	kworker/u8:0+events_unbound	19:42:11	1
1649575	99	42	24,11	cyclictest	13	1	rcu_preempt	22:00:01	0
1649575	99	42	24,11	cyclictest	13	1	rcu_preempt	22:00:00	0
1649575	99	42	18,21	cyclictest	15	1	rcuc/0	19:26:01	0
1649575	99	42	18,16	cyclictest	13	1	rcu_preempt	21:40:05	0
1649588	99	41	35,4	cyclictest	1724184	-21	kworker/u8:0+events_unbound	22:52:47	3
1649588	99	41	29,7	cyclictest	1659931	-21	grep	19:35:26	3
1649588	99	41	24,4	cyclictest	13	1	rcu_preempt	21:20:30	3
1649588	99	41	23,11	cyclictest	1672520	-21	kworker/u8:0+events_unbound	20:14:43	3
1649588	99	41	23,11	cyclictest	1672520	-21	kworker/u8:0+events_unbound	20:14:42	3
1649575	99	41	30,7	cyclictest	1737956	-21	grep	23:20:27	0
1649575	99	41	29,8	cyclictest	0	-21	swapper/0	23:20:00	0
1649575	99	41	20,17	cyclictest	1762163	-21	grep	00:30:25	0
1649575	99	41	19,9	cyclictest	13	1	rcu_preempt	23:45:22	0
1649588	99	40	29,8	cyclictest	1714234	-21	cron	22:15:00	3
1649588	99	40	29,7	cyclictest	0	-21	swapper/3	22:20:23	3
1649583	99	40	32,6	cyclictest	1760848	-21	kworker/u8:2+events_unbound	00:38:04	2
1649575	99	40	33,4	cyclictest	1702092	-21	idleruntime-cro	21:39:59	0
1649575	99	40	32,5	cyclictest	1715973	-21	sendmail	22:19:59	0
1649575	99	40	32,5	cyclictest	1686439	-21	cron	20:55:00	0
1649575	99	40	32,5	cyclictest	1686439	-21	cron	20:54:59	0
1649575	99	40	30,6	cyclictest	1717251	-21	unixbench_singl	22:20:24	0
1649588	99	39	32,4	cyclictest	1684748	-21	idleruntime-cro	20:50:00	3
1649588	99	39	31,4	cyclictest	0	-21	swapper/3	21:30:01	3
1649588	99	39	31,4	cyclictest	0	-21	swapper/3	00:05:00	3
1649580	99	39	29,5	cyclictest	1698362	-21	kworker/u8:2+events_unbound	22:22:39	1
1649575	99	39	33,4	cyclictest	1727680	-21	kworker/u8:1+events_unbound	23:12:51	0
1649575	99	39	26,4	cyclictest	13	1	rcu_preempt	22:51:24	0
1649575	99	39	23,4	cyclictest	13	1	rcu_preempt	22:58:57	0
1649575	99	39	21,10	cyclictest	13	1	rcu_preempt	19:50:22	0
1649575	99	39	15,4	cyclictest	13	1	rcu_preempt	19:14:04	0
1649588	99	38	31,4	cyclictest	0	-21	swapper/3	00:00:00	3
1649588	99	38	30,4	cyclictest	1692008	-21	fschecks_time	21:10:14	3
1649588	99	38	14,5	cyclictest	13	1	rcu_preempt	20:50:24	3
1649588	99	38	14,5	cyclictest	13	1	rcu_preempt	20:50:24	3
1649583	99	38	29,6	cyclictest	0	-21	swapper/2	20:55:00	2
1649583	99	38	29,6	cyclictest	0	-21	swapper/2	20:55:00	2
1649583	99	38	28,7	cyclictest	1692831	-21	grep	21:10:25	2
1649583	99	38	28,6	cyclictest	0	-21	swapper/2	19:40:00	2
1649583	99	38	27,7	cyclictest	1680894	-21	grep	20:35:23	2
1649583	99	38	26,5	cyclictest	13	1	rcu_preempt	19:20:01	2
1649583	99	38	19,5	cyclictest	1752186	-21	kworker/u8:0+events_unbound	00:25:48	2
1649583	99	38	15,12	cyclictest	1752186	-21	kworker/u8:0+events_unbound	00:16:23	2
1649583	99	38	15,10	cyclictest	13	1	rcu_preempt	20:00:14	2
1649580	99	38	32,4	cyclictest	1642538	-21	kworker/u8:1+events_unbound	19:37:12	1
1649580	99	38	30,5	cyclictest	1686439	-21	cron	20:55:00	1
1649580	99	38	30,5	cyclictest	1686439	-21	cron	20:55:00	1
1649580	99	38	27,7	cyclictest	0	-21	swapper/1	21:25:01	1
1649580	99	38	26,7	cyclictest	0	-21	swapper/1	19:45:22	1
1649580	99	38	22,8	cyclictest	13	1	rcu_preempt	23:55:16	1
1649575	99	38	28,6	cyclictest	1688889	-21	taskset	21:00:20	0
1649575	99	38	28,6	cyclictest	0	-21	swapper/0	19:25:01	0
1649575	99	38	27,7	cyclictest	1763876	-21	grep	00:35:24	0
1649575	99	38	27,7	cyclictest	1743543	-21	cat	23:40:01	0
1649575	99	38	18,11	cyclictest	13	1	rcu_preempt	20:00:01	0
1649575	99	38	16,10	cyclictest	13	1	rcu_preempt	19:35:24	0
1649588	99	37	29,4	cyclictest	0	-21	swapper/3	23:00:15	3
1649588	99	37	27,6	cyclictest	0	-21	swapper/3	21:00:25	3
1649588	99	37	23,5	cyclictest	13	1	rcu_preempt	21:15:17	3
1649588	99	37	21,7	cyclictest	1758794	-21	kworker/u8:1+events_unbound	00:23:41	3
1649588	99	37	20,4	cyclictest	13	1	rcu_preempt	20:40:04	3
1649588	99	37	15,5	cyclictest	13	1	rcu_preempt	20:25:21	3
1649588	99	37	15,5	cyclictest	13	1	rcu_preempt	20:25:21	3
1649588	99	37	13,5	cyclictest	13	1	rcu_preempt	00:05:17	3
1649588	99	37	13,5	cyclictest	13	1	rcu_preempt	00:05:17	3
1649583	99	37	30,5	cyclictest	1727680	-21	kworker/u8:1+events_unbound	22:57:47	2
1649583	99	37	27,6	cyclictest	0	-21	swapper/2	23:55:16	2
1649583	99	37	27,6	cyclictest	0	-21	swapper/2	22:40:01	2
1649583	99	37	27,6	cyclictest	0	-21	swapper/2	20:25:18	2
1649583	99	37	27,6	cyclictest	0	-21	swapper/2	20:25:18	2
1649583	99	37	25,7	cyclictest	31	1	ktimers/2	23:10:13	2
1649583	99	37	1,26	cyclictest	0	-21	swapper/2	19:25:12	2
1649580	99	37	29,4	cyclictest	0	-21	swapper/1	22:40:00	1
1649580	99	37	26,7	cyclictest	0	-21	swapper/1	21:50:00	1
1649580	99	37	24,6	cyclictest	1684394	-21	kworker/u8:0+events_unbound	21:04:31	1
1649575	99	37	22,4	cyclictest	13	1	rcu_preempt	23:51:30	0
1649575	99	37	20,4	cyclictest	13	1	rcu_preempt	22:36:15	0
1649575	99	37	19,5	cyclictest	1698362	-21	kworker/u8:2-ext4-rsv-conversion	22:15:00	0
1649575	99	37	19,4	cyclictest	13	1	rcu_preempt	20:25:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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