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 Tue Jul 07, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1692054	2	78	0,3	chrt	75	-21	kworker/3:1-events	21:15:11	3
1692054	2	78	0,3	chrt	75	-21	kworker/3:1-events	21:15:11	3
1642724	2	65	0,4	sleep0	0	-21	swapper/0	20:25:15	0
1569710	99	65	59,5	cyclictest	1676118	-21	kworker/u8:1+flush-8:0	21:30:22	1
1569714	99	57	36,18	cyclictest	1704890	-21	systemd-journal	00:32:31	2
1689744	2	56	0,2	sleep3	47	1	rcuc/3	21:10:16	3
1689744	2	56	0,2	sleep3	47	1	rcuc/3	21:10:16	3
1569708	99	56	45,8	cyclictest	1607111	-21	/usr/sbin/munin	19:50:23	0
1569708	99	54	49,4	cyclictest	1586277	-21	kworker/u8:2+flush-8:0	20:05:24	0
1569710	99	53	47,5	cyclictest	1687121	-21	kworker/u8:3+flush-8:0	21:55:23	1
1569708	99	51	47,3	cyclictest	1687121	-21	kworker/u8:3+events_unbound	21:15:25	0
1569708	99	51	47,3	cyclictest	1687121	-21	kworker/u8:3+events_unbound	21:15:24	0
1569708	99	51	46,3	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	20:35:20	0
1569708	99	51	45,4	cyclictest	770089	-21	kworker/u8:4+flush-8:0	19:25:12	0
1569710	99	50	42,6	cyclictest	1825709	-21	latency_hist	23:30:00	1
1569708	99	50	46,3	cyclictest	1720970	-21	kworker/u8:2+events_unbound	22:55:21	0
1569714	99	49	41,6	cyclictest	1704890	-21	systemd-journal	22:10:00	2
1569710	99	49	43,4	cyclictest	1704890	-21	systemd-journal	23:10:20	1
1569708	99	49	44,4	cyclictest	1586277	-21	kworker/u8:2+flush-8:0	19:55:11	0
1569708	99	49	38,9	cyclictest	1573663	-21	ntpq	19:10:14	0
1569708	99	48	43,3	cyclictest	1735841	-21	kworker/u8:1+flush-8:0	22:00:27	0
1569710	99	46	41,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	21:35:14	1
1569710	99	46	40,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	22:00:13	1
1569708	99	46	39,5	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	22:15:20	0
1569710	99	45	33,9	cyclictest	1704890	-21	systemd-journal	22:36:24	1
1569708	99	45	36,7	cyclictest	1700607	-21	ntpq	21:20:19	0
1569708	99	45	35,8	cyclictest	1702073	-21	diskstats	21:25:11	0
1865689	2	44	0,0	chrt	20	1	rcuc/0	00:10:01	0
1569714	99	44	36,6	cyclictest	1704890	-21	systemd-journal	23:30:31	2
1569714	99	44	34,8	cyclictest	1704890	-21	systemd-journal	20:33:20	2
1569710	99	44	35,6	cyclictest	1704890	-21	systemd-journal	20:30:01	1
1569708	99	44	40,3	cyclictest	1776055	-21	kworker/u8:0+events_unbound	22:50:19	0
1569710	99	43	39,3	cyclictest	1586277	-21	kworker/u8:2+flush-8:0	19:50:21	1
1569710	99	43	38,4	cyclictest	1631882	-21	kworker/u8:3+flush-8:0	20:15:23	1
1569708	99	43	38,4	cyclictest	1676118	-21	kworker/u8:1+flush-8:0	21:00:13	0
1569708	99	43	38,4	cyclictest	1676118	-21	kworker/u8:1+flush-8:0	21:00:12	0
1569714	99	42	26,3	cyclictest	1715966	-21	unixbench_singl	21:35:29	2
1569708	99	42	38,3	cyclictest	1835307	-21	kworker/u8:3+flush-8:0	00:05:01	0
1569710	99	41	37,3	cyclictest	1562182	-21	kworker/u8:1+flush-8:0	19:30:24	1
1569710	99	41	33,6	cyclictest	1704890	-21	systemd-journal	23:45:00	1
1569708	99	41	36,4	cyclictest	1855813	-21	kworker/u8:5+flush-8:0	00:30:24	0
1569708	99	41	36,3	cyclictest	1631882	-21	kworker/u8:3+flush-8:0	20:20:25	0
1569708	99	41	35,4	cyclictest	1770569	-21	kworker/u8:1+events_unbound	22:40:24	0
1569708	99	41	31,7	cyclictest	1690674	-21	ntpq	21:10:20	0
1569708	99	41	31,7	cyclictest	1690674	-21	ntpq	21:10:20	0
1569714	99	40	34,4	cyclictest	1621836	-21	gpgv	20:05:01	2
1569710	99	40	35,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	21:10:17	1
1569710	99	40	35,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	21:10:17	1
1569708	99	40	35,4	cyclictest	1562182	-21	kworker/u8:1+flush-8:0	19:30:26	0
1569708	99	40	35,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	21:45:25	0
1569708	99	40	34,5	cyclictest	1631882	-21	kworker/u8:3+flush-8:0	20:50:20	0
1569708	99	40	34,4	cyclictest	1562182	-21	kworker/u8:1+events_unbound	19:45:11	0
1569708	99	40	31,7	cyclictest	1894414	-21	ntpq	00:35:22	0
1569710	99	39	34,4	cyclictest	1855813	-21	kworker/u8:5+events_unbound	00:00:23	1
1569710	99	39	33,4	cyclictest	1631882	-21	kworker/u8:3+events_unbound	20:45:22	1
1569710	99	39	31,5	cyclictest	1704890	-21	systemd-journal	23:06:21	1
1569708	99	39	35,3	cyclictest	1562182	-21	kworker/u8:1+flush-8:0	19:20:11	0
1758257	2	38	0,5	sleep3	45	1	irq_work/3	22:20:16	3
1569710	99	38	33,4	cyclictest	1676118	-21	kworker/u8:1+events_unbound	21:20:21	1
1569710	99	38	31,5	cyclictest	1735841	-21	kworker/u8:1+flush-8:0	22:10:21	1
1569710	99	38	26,9	cyclictest	1704890	-21	systemd-journal	19:14:45	1
1569708	99	38	33,4	cyclictest	1825185	-21	kworker/u8:0+flush-8:0	23:35:26	0
1569708	99	38	33,4	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	20:45:30	0
1569708	99	38	28,8	cyclictest	1686389	-21	latency_hist	21:10:00	0
1569708	99	38	28,7	cyclictest	1704890	-21	systemd-journal	00:00:00	0
1569708	99	38	0,36	cyclictest	1	-21	systemd	22:25:24	0
1569708	99	38	0,36	cyclictest	1	-21	systemd	20:35:01	0
1569710	99	37	28,7	cyclictest	1671800	-21	apt-get	20:55:07	1
1569708	99	37	32,4	cyclictest	1562182	-21	kworker/u8:1+events_unbound	20:10:24	0
1569708	99	37	30,5	cyclictest	1676118	-21	kworker/u8:1+flush-8:0	21:40:29	0
1569710	99	36	32,3	cyclictest	1549070	-21	kworker/u8:0+flush-8:0	20:30:13	1
1569710	99	36	30,5	cyclictest	1687121	-21	kworker/u8:3+events_unbound	21:50:10	1
1569710	99	36	27,7	cyclictest	1770851	-21	latency_hist	22:35:01	1
1569708	99	36	32,3	cyclictest	1631882	-21	kworker/u8:3+flush-8:0	20:55:24	0
1569708	99	36	31,3	cyclictest	1562182	-21	kworker/u8:1+flush-8:0	20:00:30	0
1569355	2	36	4,9	sleep1	0	-21	swapper/1	19:07:36	1
1569710	99	35	28,6	cyclictest	1810453	-21	kworker/u8:2+flush-8:0	23:20:21	1
1569710	99	35	28,6	cyclictest	1810453	-21	kworker/u8:2+flush-8:0	23:20:20	1
1569710	99	35	28,5	cyclictest	1894373	-21	ntpq	00:35:20	1
1569708	99	35	30,4	cyclictest	1816019	-21	kworker/u8:3+flush-8:0	23:25:28	0
1569708	99	35	30,3	cyclictest	1676118	-21	kworker/u8:1+flush-8:0	21:30:26	0
1569708	99	35	29,4	cyclictest	1562182	-21	kworker/u8:1+events_unbound	19:40:22	0
1569708	99	35	26,6	cyclictest	1875440	-21	latency_hist	00:20:01	0
1569710	99	34	28,5	cyclictest	770089	-21	kworker/u8:4+flush-8:0	19:25:21	1
1569710	99	34	28,4	cyclictest	1776055	-21	kworker/u8:0+events_unbound	22:40:09	1
1569710	99	34	27,5	cyclictest	1875713	-21	apt-get	00:20:07	1
1569710	99	34	21,9	cyclictest	1704890	-21	systemd-journal	20:06:00	1
1569708	99	34	30,3	cyclictest	1810453	-21	kworker/u8:2+events_unbound	23:20:27	0
1569708	99	34	30,3	cyclictest	1810453	-21	kworker/u8:2+events_unbound	23:20:26	0
1569708	99	34	25,6	cyclictest	1775809	-21	latency_hist	22:40:00	0
1569710	99	33	28,4	cyclictest	1586277	-21	kworker/u8:2+flush-8:0	19:55:24	1
1569710	99	33	28,3	cyclictest	1770569	-21	kworker/u8:1+flush-8:0	22:45:22	1
1569714	99	32	22,7	cyclictest	1704890	-21	systemd-journal	20:55:00	2
1569710	99	32	27,4	cyclictest	1835307	-21	kworker/u8:3+events_unbound	00:25:09	1
1569710	99	32	25,5	cyclictest	1741410	-21	apt-get	22:05:06	1
1569708	99	32	28,3	cyclictest	1825185	-21	kworker/u8:0+flush-8:0	23:30:15	0
1569708	99	32	28,3	cyclictest	1735841	-21	kworker/u8:1+flush-8:0	22:05:26	0
1569714	99	31	26,3	cyclictest	1691922	-21	aten2_r5power_e	21:15:10	2
1569714	99	31	26,3	cyclictest	1691922	-21	aten2_r5power_e	21:15:09	2
1569710	99	31	27,3	cyclictest	1835307	-21	kworker/u8:3+flush-8:0	23:45:27	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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