OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Fri Jul 31, 2026 12:44:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3555157	2	196	0,3	sleep3	575	-21	kworker/3:2+events	12:38:03	3
3226122	99	54	45,6	cyclictest	3516176	-21	latency_hist	12:00:01	0
3303457	2	53	0,2	chrt	0	-21	swapper/1	08:27:58	1
3226130	99	51	45,4	cyclictest	3277706	-21	kworker/u8:3+events_unbound	08:38:07	1
3226130	99	50	41,7	cyclictest	3401970	-21	latency_hist	10:05:01	1
3226130	99	49	43,5	cyclictest	3397244	-21	kworker/u8:2+flush-8:0	10:38:11	1
3226122	99	49	43,4	cyclictest	3173708	-21	kworker/u8:0+flush-8:0	07:20:00	0
3226130	99	48	42,4	cyclictest	3243109	-21	kworker/u8:2+flush-8:0	07:38:12	1
3226130	99	48	39,7	cyclictest	275	-21	systemd-journal	12:20:00	1
3226122	99	48	40,6	cyclictest	3332294	-21	apt-get	08:55:01	0
3226122	99	47	40,5	cyclictest	3452132	-21	kworker/u8:1+flush-8:0	11:18:11	0
3226130	99	46	41,3	cyclictest	3258049	-21	kworker/u8:1+events_unbound	08:08:13	1
3226130	99	45	40,3	cyclictest	3288022	-21	kworker/u8:0+events_unbound	09:12:58	1
3226130	99	45	38,5	cyclictest	3258049	-21	kworker/u8:1+flush-8:0	08:33:08	1
3226130	99	45	37,6	cyclictest	3496831	-21	/usr/sbin/munin	11:43:09	1
3226130	99	44	39,4	cyclictest	3352498	-21	kworker/u8:2+flush-8:0	09:43:13	1
3226130	99	44	37,5	cyclictest	3258049	-21	kworker/u8:1+flush-8:0	09:03:07	1
3226130	99	43	39,3	cyclictest	3496416	-21	kworker/u8:0+events_unbound	11:57:57	1
3226130	99	43	38,4	cyclictest	3387121	-21	kworker/u8:0+events_unbound	09:57:56	1
3221399	2	43	28,9	sleep1	0	-21	swapper/1	07:06:18	1
3226134	99	42	37,3	cyclictest	3352498	-21	kworker/u8:2+flush-8:0	09:40:01	2
3226130	99	42	37,4	cyclictest	3496416	-21	kworker/u8:0+events_unbound	12:22:56	1
3226130	99	42	30,8	cyclictest	275	-21	systemd-journal	11:12:54	1
3226122	99	42	34,6	cyclictest	3357196	-21	latency_hist	09:20:01	0
3318452	2	41	0,2	sleep3	47	1	rcuc/3	08:43:00	3
3226130	99	41	36,4	cyclictest	3421959	-21	kworker/u8:3+flush-8:0	10:57:57	1
3226130	99	41	35,4	cyclictest	3462012	-21	kworker/u8:2+events_unbound	11:32:56	1
3226130	99	41	34,5	cyclictest	3496416	-21	kworker/u8:0+flush-8:0	12:28:08	1
3226130	99	41	31,7	cyclictest	275	-21	systemd-journal	09:47:54	1
3226130	99	40	30,6	cyclictest	275	-21	systemd-journal	07:22:55	1
3524040	2	39	0,2	sleep3	47	1	rcuc/3	12:08:02	3
3226130	99	39	31,6	cyclictest	3174573	-21	kworker/u8:3+events_unbound	07:28:07	1
3226130	99	39	28,7	cyclictest	275	-21	systemd-journal	11:55:00	1
3226122	99	39	34,4	cyclictest	3496416	-21	kworker/u8:0+flush-8:0	12:02:56	0
3226122	99	39	28,9	cyclictest	275	-21	systemd-journal	12:30:00	0
3244999	2	38	0,2	sleep3	48	1	ktimers/3	07:28:01	3
3226130	99	38	34,3	cyclictest	3462012	-21	kworker/u8:2+events_unbound	11:08:01	1
3226130	99	38	32,4	cyclictest	3421959	-21	kworker/u8:3+events_unbound	11:02:59	1
3226130	99	38	31,5	cyclictest	3387121	-21	kworker/u8:0+flush-8:0	09:53:07	1
3226130	99	38	31,5	cyclictest	3258049	-21	kworker/u8:1+flush-8:0	08:58:07	1
3226130	99	38	30,5	cyclictest	3451444	-21	grep	10:53:12	1
3226130	99	37	33,3	cyclictest	3288022	-21	kworker/u8:0+events_unbound	08:52:56	1
3226130	99	37	24,9	cyclictest	275	-21	systemd-journal	11:22:55	1
3226122	99	37	29,6	cyclictest	275	-21	systemd-journal	08:45:01	0
3226130	99	36	30,4	cyclictest	3496416	-21	kworker/u8:0+flush-8:0	12:33:07	1
3226130	99	36	29,5	cyclictest	3452132	-21	kworker/u8:1+flush-8:0	11:18:12	1
3226130	99	36	29,5	cyclictest	3397244	-21	kworker/u8:2+events_unbound	10:18:04	1
3226130	99	35	29,5	cyclictest	3258049	-21	kworker/u8:1+events_unbound	07:53:07	1
3226130	99	35	29,4	cyclictest	3496416	-21	kworker/u8:0+events_unbound	11:48:11	1
3226122	99	35	31,3	cyclictest	3496416	-21	kworker/u8:0+flush-8:0	12:18:07	0
3226134	99	34	27,5	cyclictest	275	-21	systemd-journal	07:15:00	2
3226130	99	34	29,4	cyclictest	3258049	-21	kworker/u8:1+events_unbound	09:33:02	1
3226130	99	34	29,3	cyclictest	3421959	-21	kworker/u8:3+events_unbound	10:48:00	1
3226122	99	34	23,9	cyclictest	3272696	-21	apt-get	07:55:00	0
3226122	99	33	29,3	cyclictest	3497078	-21	tr	11:42:54	0
3221500	2	33	4,10	sleep2	0	-21	swapper/2	07:07:35	2
3226134	99	32	26,4	cyclictest	3492594	-21	irqrtprio	11:37:59	2
3226130	99	32	28,2	cyclictest	0	-21	swapper/1	09:30:00	1
3226130	99	32	27,3	cyclictest	3429307	-21	kthreadcore	10:33:02	1
3226130	99	32	27,3	cyclictest	3429307	-21	kthreadcore	10:33:02	1
3226130	99	32	27,3	cyclictest	3362159	-21	latency_hist	09:25:00	1
3226130	99	32	26,4	cyclictest	3551504	-21	apt-get	12:37:51	1
3226130	99	32	26,4	cyclictest	3452132	-21	kworker/u8:1+flush-8:0	11:28:12	1
3226130	99	32	24,6	cyclictest	3407375	-21	apt-get	10:12:52	1
3226130	99	32	23,7	cyclictest	3526759	-21	/usr/sbin/munin	12:13:04	1
3226122	99	32	26,4	cyclictest	3253495	-21	diskstats	07:37:57	0
3226122	99	32	24,6	cyclictest	3417217	-21	/usr/sbin/munin	10:23:05	0
3226122	99	32	22,8	cyclictest	3490717	-21	ntpq	11:33:06	0
3226134	99	31	22,7	cyclictest	3366848	-21	unixbench_multi	09:28:14	2
3226130	99	31	27,3	cyclictest	3387121	-21	kworker/u8:0+events_unbound	10:27:55	1
3226130	99	31	25,4	cyclictest	3277706	-21	kworker/u8:3-ext4-rsv-conversion	08:05:01	1
3226130	99	31	25,4	cyclictest	3258049	-21	kworker/u8:1+flush-8:0	08:48:02	1
3226130	99	31	24,5	cyclictest	3273369	-21	/usr/sbin/munin	07:58:11	1
3226122	99	31	26,3	cyclictest	3252755	-21	idleruntime-cro	07:34:59	0
3226122	99	31	25,4	cyclictest	3502151	-21	fschecks_time	11:48:02	0
3226130	99	30	26,2	cyclictest	3258049	-21	kworker/u8:1+events_unbound	10:23:01	1
3226130	99	30	25,4	cyclictest	3173708	-21	kworker/u8:0+events_unbound	07:18:06	1
3226122	99	30	25,4	cyclictest	3397244	-21	kworker/u8:2+flush-8:0	10:03:01	0
3226122	99	30	24,4	cyclictest	3492597	-21	irqrtprio	11:37:58	0
3226122	99	30	20,8	cyclictest	3388298	-21	irqrtprio	09:53:00	0
3226134	99	29	21,6	cyclictest	3467475	-21	fschecks_count	11:12:57	2
3226134	99	29	17,9	cyclictest	3436579	-21	awk	10:39:59	2
3226130	99	29	25,3	cyclictest	3277706	-21	kworker/u8:3+events_unbound	09:08:13	1
3226130	99	29	24,3	cyclictest	3496416	-21	kworker/u8:0+flush-8:0	12:03:05	1
3226130	99	29	23,4	cyclictest	3258049	-21	kworker/u8:1+events_unbound	07:47:55	1
3226130	99	29	22,4	cyclictest	3421959	-21	kworker/u8:3+events_unbound	10:43:08	1
3226122	99	29	23,4	cyclictest	3377015	-21	unixbench_singl	09:38:14	0
3226122	99	29	22,5	cyclictest	3317483	-21	sendmail	08:40:00	0
3226122	99	29	17,10	cyclictest	0	-21	swapper/0	08:30:00	0
3257961	2	28	0,3	sleep3	575	-21	kworker/3:2-events	07:40:02	3
3226134	99	28	24,3	cyclictest	3461542	-21	unixbench_multi	11:03:13	2
3226134	99	28	20,7	cyclictest	3411645	-21	unixbench_singl	10:13:13	2
3226130	99	28	23,3	cyclictest	3298413	-21	cpuspeed_turbos	08:22:55	1
3226130	99	28	23,3	cyclictest	3258884	-21	irqcore	07:43:00	1
3226122	99	28	21,5	cyclictest	3297438	-21	grep	08:18:13	0
3226122	99	28	19,6	cyclictest	3372257	-21	latency_hist	09:35:00	0
3226134	99	27	24,2	cyclictest	3506046	-21	unixbench_multi	11:48:17	2
3226134	99	27	22,3	cyclictest	3351989	-21	grep	09:13:13	2
3226134	99	27	21,4	cyclictest	3173708	-21	kworker/u8:0+flush-8:0	07:25:00	2
3226130	99	27	22,4	cyclictest	3231023	-21	systemd-run	07:15:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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