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 Wed Jul 01, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
802175	2	91	0,3	chrt	0	-21	swapper/0	09:25:22	0
864300	2	80	0,3	sleep0	0	-21	swapper/0	10:30:14	0
662103	99	62	56,4	cyclictest	630057	-21	kworker/u8:1+events_unbound	07:25:28	1
662101	99	59	52,5	cyclictest	662243	-21	kworker/u8:0+flush-8:0	08:25:28	0
662101	99	57	52,3	cyclictest	763790	-21	kworker/u8:1+flush-8:0	09:05:30	0
662103	99	56	48,6	cyclictest	788132	-21	kworker/u8:0+events_unbound	09:20:25	1
852184	2	55	0,2	sleep3	75	-21	kworker/3:1-events	10:15:21	3
662107	99	54	42,9	cyclictest	813772	-21	apt-get	09:40:00	2
662103	99	54	49,4	cyclictest	662243	-21	kworker/u8:0+flush-8:0	07:30:32	1
662103	99	54	49,3	cyclictest	853304	-21	kworker/u8:2+events_unbound	10:20:00	1
662103	99	52	46,4	cyclictest	833831	-21	kworker/u8:3+events_unbound	10:35:29	1
662103	99	52	46,4	cyclictest	833831	-21	kworker/u8:3+events_unbound	10:35:29	1
662103	99	51	45,5	cyclictest	913949	-21	kworker/u8:0+flush-8:0	12:15:26	1
662103	99	51	45,4	cyclictest	709810	-21	kworker/u8:2+events_unbound	07:55:27	1
662103	99	51	43,6	cyclictest	788132	-21	kworker/u8:0+flush-8:0	09:25:26	1
707815	2	50	0,3	chrt	45	1	irq_work/3	07:50:21	3
662103	99	50	45,4	cyclictest	833831	-21	kworker/u8:3+flush-8:0	10:00:24	1
662103	99	50	44,4	cyclictest	913949	-21	kworker/u8:0+flush-8:0	11:20:26	1
662103	99	50	42,6	cyclictest	833831	-21	kworker/u8:3+flush-8:0	10:50:30	1
662103	99	49	44,4	cyclictest	788132	-21	kworker/u8:0+events_unbound	09:40:28	1
662103	99	49	39,8	cyclictest	942516	-21	ntpq	11:45:23	1
662103	99	48	41,5	cyclictest	946313	-21	kworker/u8:2+flush-8:0	12:25:25	1
662101	99	48	45,2	cyclictest	738361	-21	kworker/u8:3+flush-8:0	08:30:30	0
662107	99	47	35,9	cyclictest	843694	-21	/usr/sbin/munin	10:10:00	2
662103	99	47	42,4	cyclictest	788132	-21	kworker/u8:0+flush-8:0	10:40:30	1
662103	99	47	40,5	cyclictest	833831	-21	kworker/u8:3+flush-8:0	11:00:24	1
662103	99	47	40,5	cyclictest	788132	-21	kworker/u8:0+flush-8:0	10:10:24	1
662103	99	47	40,5	cyclictest	693809	-21	apt-key	07:40:01	1
662101	99	47	41,4	cyclictest	662243	-21	kworker/u8:0+flush-8:0	07:30:28	0
662103	99	46	41,4	cyclictest	985482	-21	kworker/u8:0+events_unbound	12:35:28	1
662103	99	46	41,4	cyclictest	788132	-21	kworker/u8:0+events_unbound	10:25:31	1
662103	99	46	40,5	cyclictest	763790	-21	kworker/u8:1+flush-8:0	09:05:26	1
662103	99	46	40,5	cyclictest	630057	-21	kworker/u8:1+events_unbound	08:05:27	1
662103	99	46	40,4	cyclictest	883859	-21	kworker/u8:2+flush-8:0	10:55:26	1
662101	99	46	39,4	cyclictest	754575	-21	kworker/u8:2+flush-8:0	09:00:18	0
662103	99	45	40,4	cyclictest	899000	-21	kworker/u8:4+events_unbound	11:25:24	1
662103	99	45	36,7	cyclictest	739161	-21	latency_hist	08:25:02	1
662101	99	45	38,5	cyclictest	918912	-21	/usr/sbin/munin	11:25:22	0
662101	99	45	36,7	cyclictest	768280	-21	ntpq	08:50:23	0
662103	99	44	40,3	cyclictest	763790	-21	kworker/u8:1+events_unbound	09:00:35	1
662103	99	44	40,3	cyclictest	662243	-21	kworker/u8:0+events_unbound	07:15:14	1
662103	99	44	40,3	cyclictest	662243	-21	kworker/u8:0+events_unbound	07:15:13	1
662103	99	44	38,5	cyclictest	946313	-21	kworker/u8:2+flush-8:0	12:20:30	1
662103	99	44	37,5	cyclictest	630057	-21	kworker/u8:1+flush-8:0	08:10:16	1
662103	99	44	33,8	cyclictest	907840	-21	ntpq	11:10:25	1
662101	99	44	34,8	cyclictest	1704890	-21	systemd-journal	07:50:01	0
662101	99	44	34,7	cyclictest	683181	-21	python3	07:25:28	0
662103	99	43	39,3	cyclictest	662243	-21	kworker/u8:0+events_unbound	08:25:33	1
662103	99	43	38,4	cyclictest	899000	-21	kworker/u8:4+flush-8:0	11:15:25	1
662103	99	43	38,4	cyclictest	763790	-21	kworker/u8:1+events_unbound	09:10:14	1
662103	99	42	38,3	cyclictest	913949	-21	kworker/u8:0+flush-8:0	11:35:24	1
662103	99	41	37,3	cyclictest	662243	-21	kworker/u8:0+events_unbound	08:35:21	1
662103	99	41	36,4	cyclictest	763790	-21	kworker/u8:1+flush-8:0	08:55:26	1
662103	99	41	36,3	cyclictest	788575	-21	kworker/u8:4+events_unbound	09:35:34	1
662101	99	41	36,4	cyclictest	738361	-21	kworker/u8:3+flush-8:0	08:45:15	0
662101	99	41	31,7	cyclictest	1704890	-21	systemd-journal	11:35:10	0
662103	99	40	34,4	cyclictest	843924	-21	kworker/u8:1+events_unbound	10:20:23	1
662103	99	39	34,3	cyclictest	788575	-21	kworker/u8:4+flush-8:0	09:15:21	1
662103	99	39	33,5	cyclictest	913949	-21	kworker/u8:0+flush-8:0	11:55:30	1
662103	99	39	33,5	cyclictest	709810	-21	kworker/u8:2+events_unbound	08:15:28	1
662103	99	39	32,5	cyclictest	967790	-21	grep	12:10:29	1
662103	99	39	30,6	cyclictest	1704890	-21	systemd-journal	07:25:00	1
662101	99	39	33,4	cyclictest	729036	-21	apt-get	08:15:01	0
662101	99	39	33,4	cyclictest	662243	-21	kworker/u8:0+events_unbound	07:20:17	0
662103	99	38	34,3	cyclictest	630057	-21	kworker/u8:1+flush-8:0	07:40:21	1
662103	99	38	33,4	cyclictest	788132	-21	kworker/u8:0+events_unbound	10:05:14	1
662103	99	38	32,5	cyclictest	833831	-21	kworker/u8:3+flush-8:0	11:05:25	1
662103	99	38	32,4	cyclictest	763790	-21	kworker/u8:1+flush-8:0	08:50:26	1
662101	99	38	32,5	cyclictest	788132	-21	kworker/u8:0+flush-8:0	09:30:31	0
662101	99	38	28,8	cyclictest	1704890	-21	systemd-journal	12:05:01	0
662103	99	37	32,4	cyclictest	899000	-21	kworker/u8:4+events_unbound	11:50:14	1
662103	99	37	31,4	cyclictest	788132	-21	kworker/u8:0+flush-8:0	09:45:21	1
662103	99	37	28,6	cyclictest	1704890	-21	systemd-journal	10:31:09	1
662101	99	37	32,3	cyclictest	788132	-21	kworker/u8:0+flush-8:0	09:40:30	0
662101	99	37	31,4	cyclictest	630057	-21	kworker/u8:1+flush-8:0	07:15:34	0
662101	99	37	31,4	cyclictest	630057	-21	kworker/u8:1+flush-8:0	07:15:34	0
662101	99	37	27,8	cyclictest	909252	-21	diskstats	11:15:13	0
662101	99	36	26,8	cyclictest	813772	-21	apt-get	09:40:00	0
662103	99	35	31,3	cyclictest	788132	-21	kworker/u8:0+flush-8:0	09:55:24	1
662103	99	35	31,2	cyclictest	843924	-21	kworker/u8:1+events_unbound	10:45:15	1
662103	99	35	30,3	cyclictest	662243	-21	kworker/u8:0+events_unbound	08:45:29	1
662103	99	35	30,3	cyclictest	630057	-21	kworker/u8:1+events_unbound	07:50:19	1
662103	99	35	25,8	cyclictest	666035	-21	ntpq	07:10:25	1
662103	99	35	25,8	cyclictest	666035	-21	ntpq	07:10:24	1
662101	99	35	30,4	cyclictest	709810	-21	kworker/u8:2+flush-8:0	07:55:28	0
662101	99	35	30,3	cyclictest	788132	-21	kworker/u8:0+events_unbound	09:10:29	0
662101	99	35	28,4	cyclictest	938068	-21	grep	11:40:31	0
662101	99	35	23,9	cyclictest	1704890	-21	systemd-journal	11:35:00	0
662103	99	34	29,3	cyclictest	788132	-21	kworker/u8:0+events_unbound	09:30:19	1
662103	99	34	28,4	cyclictest	709810	-21	kworker/u8:2+flush-8:0	08:00:26	1
662103	99	34	23,8	cyclictest	927720	-21	ntpq	11:30:24	1
662101	99	34	27,5	cyclictest	893800	-21	/usr/sbin/munin	11:00:22	0
662103	99	33	25,6	cyclictest	703048	-21	ntpq	07:45:24	1
662103	99	33	22,9	cyclictest	1704890	-21	systemd-journal	08:31:51	1
662101	99	33	29,3	cyclictest	662243	-21	kworker/u8:0+flush-8:0	08:10:32	0
662101	99	33	25,6	cyclictest	1704890	-21	systemd-journal	09:59:59	0
662103	99	32	24,6	cyclictest	758477	-21	ntpq	08:40:28	1
662107	99	31	24,5	cyclictest	908749	-21	awk	11:15:01	2
662107	99	31	24,4	cyclictest	849251	-21	fschecks_time	10:15:14	2
662103	99	31	25,5	cyclictest	788575	-21	kworker/u8:4+events_unbound	09:50:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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