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 Sun Jun 07, 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
1656961	2	182	0,6	sleep3	0	-21	swapper/3	08:15:39	3
1644583	2	181	0,3	sleep3	75	-21	kworker/3:1-events	08:00:42	3
1589546	99	64	1,61	cyclictest	1	-21	systemd	11:42:14	0
1589548	99	61	57,3	cyclictest	1850086	-21	kworker/u8:2+flush-8:0	11:42:37	1
1589551	99	59	49,7	cyclictest	1704890	-21	systemd-journal	11:42:39	2
1589551	99	55	32,20	cyclictest	1740722	-21	cp	09:40:00	2
1589548	99	55	45,8	cyclictest	1676014	-21	kworker/u8:2+flush-8:0	08:55:46	1
1589548	99	53	46,5	cyclictest	1784997	-21	kworker/u8:1+events_unbound	11:00:50	1
1589548	99	51	44,5	cyclictest	1758112	-21	kworker/u8:0+events_unbound	11:45:46	1
1589548	99	51	43,6	cyclictest	1784997	-21	kworker/u8:1+flush-8:0	10:30:47	1
1589548	99	50	44,4	cyclictest	753075	-21	kworker/u8:0+flush-8:0	07:35:45	1
1589548	99	49	44,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:45:50	1
1589548	99	49	39,8	cyclictest	1838993	-21	ntpq	11:15:45	1
1589548	99	48	43,4	cyclictest	1676014	-21	kworker/u8:2+events_unbound	09:35:42	1
1589548	99	48	42,4	cyclictest	753075	-21	kworker/u8:0+flush-8:0	07:20:50	1
1589548	99	48	42,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:35:48	1
1589546	99	48	36,9	cyclictest	1704890	-21	systemd-journal	12:20:40	0
1589551	99	47	28,16	cyclictest	1704890	-21	systemd-journal	09:53:56	2
1589548	99	47	42,4	cyclictest	1715596	-21	kworker/u8:1+events_unbound	09:15:45	1
1589548	99	47	42,3	cyclictest	1850086	-21	kworker/u8:2+flush-8:0	11:35:48	1
1589548	99	47	40,5	cyclictest	1850086	-21	kworker/u8:2+flush-8:0	12:35:46	1
1589548	99	46	41,4	cyclictest	1784997	-21	kworker/u8:1+flush-8:0	11:10:38	1
1589548	99	46	41,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:15:39	1
1589548	99	46	41,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:15:39	1
1589548	99	46	40,4	cyclictest	1527706	-21	kworker/u8:2+events_unbound	07:10:47	1
1589548	99	46	39,5	cyclictest	1890193	-21	kworker/u8:3+events_unbound	12:15:44	1
1589548	99	46	34,9	cyclictest	1848886	-21	ntpq	11:25:44	1
1589546	99	46	38,6	cyclictest	1784997	-21	kworker/u8:1+flush-8:0	10:30:46	0
1589546	99	46	34,9	cyclictest	1799274	-21	ntpq	10:35:44	0
1589548	99	45	40,4	cyclictest	1631055	-21	kworker/u8:3+events_unbound	08:20:53	1
1589548	99	45	39,5	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:40:51	1
1589548	99	45	39,4	cyclictest	1631055	-21	kworker/u8:3+events_unbound	08:25:51	1
1589548	99	45	39,4	cyclictest	1631055	-21	kworker/u8:3+events_unbound	08:25:51	1
1589548	99	45	38,5	cyclictest	753075	-21	kworker/u8:0+flush-8:0	07:55:47	1
1589548	99	45	38,5	cyclictest	1701177	-21	kworker/u8:3+flush-8:0	11:20:46	1
1589548	99	45	36,7	cyclictest	1785579	-21	/usr/sbin/munin	10:25:47	1
1589548	99	45	36,7	cyclictest	1675114	-21	ntpq	08:30:44	1
1589551	99	44	33,9	cyclictest	1704890	-21	systemd-journal	12:00:37	2
1589548	99	44	40,3	cyclictest	1665766	-21	kworker/u8:0+events_unbound	08:45:32	1
1589548	99	44	39,4	cyclictest	1631055	-21	kworker/u8:3+events_unbound	08:10:45	1
1589548	99	44	38,4	cyclictest	1890193	-21	kworker/u8:3+flush-8:0	12:20:45	1
1589548	99	44	37,5	cyclictest	1758112	-21	kworker/u8:0+flush-8:0	10:20:45	1
1589548	99	44	36,6	cyclictest	1758112	-21	kworker/u8:0+flush-8:0	11:55:46	1
1589548	99	43	38,4	cyclictest	1890193	-21	kworker/u8:3+flush-8:0	12:10:46	1
1589548	99	43	38,4	cyclictest	1721427	-21	kworker/u8:0+events_unbound	09:30:49	1
1589548	99	43	35,6	cyclictest	1701177	-21	kworker/u8:3+events_unbound	09:25:43	1
1589546	99	43	33,8	cyclictest	1769606	-21	ntpq	10:05:44	0
1589546	99	43	32,9	cyclictest	753075	-21	kworker/u8:0+flush-8:0	08:00:44	0
1589548	99	42	38,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:05:01	1
1589548	99	42	35,5	cyclictest	1850086	-21	kworker/u8:2+flush-8:0	12:00:46	1
1589551	99	41	25,14	cyclictest	1816435	-21	kthreadcore	10:55:39	2
1589548	99	41	36,3	cyclictest	1650271	-21	kworker/u8:2+flush-8:0	08:20:00	1
1589548	99	41	36,3	cyclictest	1589653	-21	kworker/u8:1+events_unbound	08:40:50	1
1589548	99	41	31,8	cyclictest	1749816	-21	ntpq	09:45:44	1
1589548	99	41	31,7	cyclictest	1610350	-21	ntpq	07:25:44	1
1589546	99	41	35,4	cyclictest	1704890	-21	systemd-journal	08:49:56	0
1589546	99	41	32,7	cyclictest	1891043	-21	latency_hist	12:10:01	0
1589546	99	41	32,7	cyclictest	1891043	-21	latency_hist	12:10:00	0
1589551	99	40	32,5	cyclictest	1666285	-21	cp	08:25:00	2
1589548	99	40	35,3	cyclictest	1665766	-21	kworker/u8:0+flush-8:0	09:05:00	1
1589548	99	40	31,7	cyclictest	1650107	-21	ntpq	08:05:46	1
1589546	99	40	30,7	cyclictest	1760558	-21	latency_hist	10:00:01	0
1589551	99	39	31,6	cyclictest	1704890	-21	systemd-journal	07:34:41	2
1589548	99	39	34,4	cyclictest	753075	-21	kworker/u8:0+flush-8:0	07:15:47	1
1589548	99	39	33,4	cyclictest	1784997	-21	kworker/u8:1+events_unbound	11:05:42	1
1589548	99	38	33,4	cyclictest	753075	-21	kworker/u8:0+events_unbound	07:30:48	1
1589548	99	38	33,4	cyclictest	1701177	-21	kworker/u8:3+events_unbound	11:30:40	1
1589548	99	38	33,3	cyclictest	753075	-21	kworker/u8:0+events_unbound	07:50:38	1
1589546	99	38	32,4	cyclictest	753075	-21	kworker/u8:0+flush-8:0	07:50:36	0
1589546	99	38	32,4	cyclictest	1631055	-21	kworker/u8:3+flush-8:0	08:20:38	0
1589551	99	37	30,5	cyclictest	1704890	-21	systemd-journal	12:00:00	2
1589548	99	37	31,5	cyclictest	1665766	-21	kworker/u8:0+flush-8:0	09:10:47	1
1589548	99	37	29,6	cyclictest	1758112	-21	kworker/u8:0+flush-8:0	12:25:46	1
1589546	99	37	28,7	cyclictest	1704890	-21	systemd-journal	11:20:00	0
1589551	99	36	28,5	cyclictest	1704890	-21	systemd-journal	10:50:21	2
1589551	99	36	21,13	cyclictest	0	-21	swapper/2	09:15:01	2
1589548	99	36	29,5	cyclictest	1704890	-21	systemd-journal	07:46:54	1
1589240	2	36	4,10	sleep1	0	-21	swapper/1	07:08:44	1
1589548	99	35	30,3	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:50:40	1
1589548	99	35	29,4	cyclictest	1701177	-21	kworker/u8:3+events_unbound	09:20:53	1
1589551	99	34	4,24	cyclictest	1691347	-21	apt-get	08:50:31	2
1589551	99	34	2,24	cyclictest	1820487	-21	apt-get	11:00:33	2
1589551	99	34	2,12	cyclictest	1596643	-21	apt-get	07:15:33	2
1589546	99	34	27,5	cyclictest	1715544	-21	apt-get	09:11:38	0
1589551	99	33	13,16	cyclictest	1621163	-21	awk	07:40:00	2
1589551	99	33	1,12	cyclictest	1740605	-21	apt-get	09:40:03	2
1589548	99	33	29,3	cyclictest	1665766	-21	kworker/u8:0+flush-8:0	09:05:39	1
1589546	99	33	29,2	cyclictest	1891677	-21	fschecks_time	12:10:36	0
1680325	2	32	0,3	sleep3	48	1	ktimers/3	08:35:48	3
1589551	99	32	18,12	cyclictest	1646623	-21	cpuspeed_turbos	08:05:33	2
1589548	99	32	28,3	cyclictest	1701177	-21	kworker/u8:3+flush-8:0	09:50:35	1
1589548	99	32	26,5	cyclictest	1784997	-21	kworker/u8:1+events_unbound	10:55:22	1
1589548	99	32	26,5	cyclictest	1665766	-21	kworker/u8:0+flush-8:0	08:50:42	1
1589546	99	32	28,2	cyclictest	1750724	-21	systemd-run	09:50:00	0
1589546	99	32	23,6	cyclictest	1704890	-21	systemd-journal	07:55:01	0
1589548	99	31	26,4	cyclictest	1758112	-21	kworker/u8:0+events_unbound	10:05:45	1
1589548	99	31	26,4	cyclictest	1665766	-21	kworker/u8:0+events_unbound	08:35:55	1
1589548	99	31	25,4	cyclictest	1701177	-21	kworker/u8:3+flush-8:0	09:55:41	1
1589548	99	31	25,4	cyclictest	1589653	-21	kworker/u8:1+flush-8:0	07:40:41	1
1589546	99	31	26,3	cyclictest	1771006	-21	cpuspeed_turbos	10:10:34	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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