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 Thu Dec 11, 2025 00:44:50)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3744534	99	49	39,6	cyclictest	299	-21	systemd-logind	20:36:18	1
3744534	99	49	39,6	cyclictest	299	-21	systemd-logind	20:36:17	1
3744540	99	48	41,5	cyclictest	3762269	-21	kworker/u8:0+events_unbound	20:31:17	2
3744543	99	45	38,5	cyclictest	3770942	-21	kworker/u8:1+events_unbound	20:21:14	3
3744543	99	45	35,7	cyclictest	39	1	ktimers/3	22:30:12	3
3744540	99	45	35,6	cyclictest	3830929	-21	grep	23:15:26	2
3744534	99	44	2,17	cyclictest	24	-21	ksoftirqd/1	22:15:12	1
3744534	99	44	2,17	cyclictest	24	-21	ksoftirqd/1	22:15:12	1
3744529	99	44	36,4	cyclictest	3822826	-21	apt-key	22:55:01	0
3744529	99	43	34,6	cyclictest	3820485	-21	unixbench_multi	22:45:27	0
3744529	99	43	29,10	cyclictest	12	1	ktimers/0	23:45:12	0
3744534	99	42	35,4	cyclictest	3803661	-21	cron	22:00:00	1
3744529	99	42	34,5	cyclictest	3803384	-21	kworker/u8:1+events_unbound	22:00:13	0
3744540	99	41	21,7	cyclictest	13	1	rcu_preempt	19:30:13	2
3744540	99	41	21,7	cyclictest	13	1	rcu_preempt	19:30:13	2
3744543	99	39	28,6	cyclictest	0	-21	swapper/3	00:18:53	3
3744540	99	39	29,5	cyclictest	0	-21	swapper/2	19:20:17	2
3744540	99	39	23,12	cyclictest	31	1	ktimers/2	21:35:14	2
3744534	99	39	31,6	cyclictest	3727324	-21	kworker/u8:0+events_unbound	19:16:06	1
3744534	99	39	28,7	cyclictest	3843319	-21	cron	23:55:00	1
3744543	99	38	32,4	cyclictest	3810416	-21	kworker/u8:1+events_unbound	22:51:47	3
3744534	99	38	30,5	cyclictest	3769562	-21	cron	20:20:01	1
3744534	99	38	23,5	cyclictest	13	1	rcu_preempt	00:20:55	1
3744543	99	37	28,5	cyclictest	0	-21	swapper/3	22:25:26	3
3744540	99	37	28,5	cyclictest	0	-21	swapper/2	19:35:16	2
3744534	99	37	1,16	cyclictest	24	-21	ksoftirqd/1	22:45:12	1
3744529	99	37	30,3	cyclictest	0	-21	swapper/0	00:20:00	0
3744529	99	37	25,8	cyclictest	0	-21	swapper/0	00:30:26	0
3744543	99	36	29,5	cyclictest	3787946	-21	kworker/u8:3+events_unbound	21:11:25	3
3744543	99	36	27,7	cyclictest	3750033	-21	kworker/u8:2+events_unbound	19:36:10	3
3744543	99	36	26,6	cyclictest	0	-21	swapper/3	23:41:54	3
3744543	99	36	22,6	cyclictest	3855086	-21	kworker/u8:2+events_unbound	00:31:42	3
3744540	99	36	28,4	cyclictest	0	-21	swapper/2	22:45:01	2
3744540	99	36	27,6	cyclictest	3834375	-21	unixbench_singl	23:25:26	2
3744540	99	36	25,7	cyclictest	0	-21	swapper/2	23:40:26	2
3744540	99	36	25,7	cyclictest	0	-21	swapper/2	22:40:01	2
3744540	99	36	17,6	cyclictest	13	1	rcu_preempt	20:20:25	2
3744534	99	36	29,4	cyclictest	0	-21	swapper/1	22:55:00	1
3744534	99	36	20,6	cyclictest	3810416	-21	kworker/u8:1+events_unbound	22:31:47	1
3744529	99	36	22,10	cyclictest	12	1	ktimers/0	21:45:10	0
3744543	99	35	28,4	cyclictest	3759127	-21	idleruntime-cro	19:50:01	3
3744543	99	35	28,4	cyclictest	3759127	-21	idleruntime-cro	19:50:01	3
3744543	99	35	26,5	cyclictest	3779798	-21	kthreadd	20:50:00	3
3744543	99	35	22,7	cyclictest	13	1	rcu_preempt	21:15:21	3
3744540	99	35	26,6	cyclictest	3791288	-21	unixbench_multi	21:20:27	2
3744540	99	35	26,5	cyclictest	0	-21	swapper/2	22:35:01	2
3744540	99	35	26,4	cyclictest	0	-21	swapper/2	20:35:17	2
3744540	99	35	26,4	cyclictest	0	-21	swapper/2	20:35:17	2
3744540	99	35	23,7	cyclictest	0	-21	swapper/2	19:15:25	2
3744534	99	35	19,5	cyclictest	13	1	rcu_preempt	21:15:12	1
3744529	99	35	28,4	cyclictest	3796856	-21	cron	21:40:01	0
3744543	99	34	26,4	cyclictest	0	-21	swapper/3	23:10:00	3
3744543	99	34	25,5	cyclictest	0	-21	swapper/3	20:44:59	3
3744543	99	34	2,11	cyclictest	40	-21	ksoftirqd/3	22:20:13	3
3744543	99	34	19,9	cyclictest	13	1	rcu_preempt	21:09:22	3
3744540	99	34	24,6	cyclictest	0	-21	swapper/2	20:10:26	2
3744534	99	34	9,15	cyclictest	24	-21	ksoftirqd/1	20:50:01	1
3744534	99	34	26,4	cyclictest	0	-21	swapper/1	23:55:25	1
3744534	99	34	24,7	cyclictest	3841632	-21	idleruntime-cro	23:49:59	1
3744534	99	34	23,7	cyclictest	3782780	-21	grep	20:55:29	1
3744534	99	34	23,6	cyclictest	0	-21	swapper/1	21:10:16	1
3744534	99	34	16,4	cyclictest	0	-21	swapper/1	00:39:14	1
3744529	99	34	25,5	cyclictest	0	-21	swapper/0	20:15:01	0
3744529	99	34	24,6	cyclictest	0	-21	swapper/0	23:55:25	0
3744529	99	34	24,6	cyclictest	0	-21	swapper/0	22:30:25	0
3744529	99	34	23,6	cyclictest	0	-21	swapper/0	21:05:00	0
3744529	99	34	23,6	cyclictest	0	-21	swapper/0	19:40:28	0
3744529	99	34	11,12	cyclictest	13	1	rcu_preempt	23:30:10	0
3744543	99	33	26,4	cyclictest	0	-21	swapper/3	20:40:00	3
3744543	99	33	26,4	cyclictest	0	-21	swapper/3	20:40:00	3
3744543	99	33	24,6	cyclictest	3762529	-21	ls	19:59:59	3
3744543	99	33	24,6	cyclictest	0	-21	swapper/3	23:30:00	3
3744543	99	33	22,4	cyclictest	13	1	rcu_preempt	23:15:18	3
3744543	99	33	21,5	cyclictest	3836344	-21	kworker/u8:1+events_unbound	23:33:53	3
3744543	99	33	18,6	cyclictest	3843285	-21	kworker/u8:0+events_unbound	23:59:42	3
3744540	99	33	27,4	cyclictest	3786340	-21	kworker/u8:2+events_unbound	21:26:30	2
3744540	99	33	24,6	cyclictest	3777677	-21	unixbench_singl	20:40:25	2
3744540	99	33	23,7	cyclictest	440	-21	cron	20:05:00	2
3744540	99	33	23,6	cyclictest	0	-21	swapper/2	22:00:27	2
3744540	99	33	22,7	cyclictest	0	-21	swapper/2	00:35:27	2
3744534	99	33	8,7	cyclictest	24	-21	ksoftirqd/1	20:25:01	1
3744534	99	33	25,5	cyclictest	3755280	-21	head	19:35:25	1
3744534	99	33	25,4	cyclictest	0	-21	swapper/1	22:35:17	1
3744534	99	33	25,4	cyclictest	0	-21	swapper/1	19:10:27	1
3744534	99	33	22,8	cyclictest	440	-21	cron	22:30:00	1
3744534	99	33	15,6	cyclictest	3782163	-21	kworker/u8:0+events_unbound	21:04:30	1
3744529	99	33	26,5	cyclictest	3762269	-21	kworker/u8:0+events_unbound	20:06:14	0
3744529	99	33	23,7	cyclictest	440	-21	cron	21:30:00	0
3744529	99	33	22,6	cyclictest	0	-21	swapper/0	20:40:25	0
3744529	99	33	15,15	cyclictest	3772992	-21	idleruntime-cro	20:30:01	0
3744543	99	32	25,4	cyclictest	0	-21	swapper/3	21:50:28	3
3744543	99	32	24,4	cyclictest	0	-21	swapper/3	23:00:26	3
3744543	99	32	24,4	cyclictest	0	-21	swapper/3	00:00:26	3
3744543	99	32	21,7	cyclictest	3769553	-21	apt	20:20:01	3
3744543	99	32	21,5	cyclictest	3839807	-21	kworker/u8:1+events_unbound	23:45:01	3
3744543	99	32	19,5	cyclictest	3742306	-21	kworker/u8:1+events_unbound	19:17:30	3
3744540	99	32	22,6	cyclictest	0	-21	swapper/2	22:15:00	2
3744540	99	32	22,6	cyclictest	0	-21	swapper/2	22:15:00	2
3744534	99	32	9,14	cyclictest	24	-21	ksoftirqd/1	20:15:02	1
3744534	99	32	25,3	cyclictest	0	-21	swapper/1	20:00:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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