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 Dec 12, 2025 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1616809	2	84	0,3	chrt	586	-21	kworker/3:2+events	20:51:18	3
1511933	99	68	46,19	cyclictest	1821366	-21	latency_hist	00:20:01	0
1511933	99	64	46,16	cyclictest	1780798	-21	ntpq	23:36:12	0
1511943	99	58	52,4	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	20:21:21	2
1511933	99	57	40,15	cyclictest	1628252	-21	diskstats	21:06:09	0
1511933	99	56	34,8	cyclictest	1815567	-21	ntpq	00:11:17	0
1811105	2	54	0,2	chrt	45	1	irq_work/3	00:06:21	3
1511939	99	54	48,3	cyclictest	1766667	-21	kworker/u8:3+events_unbound	23:56:03	1
1511943	99	52	47,4	cyclictest	1742215	-21	kworker/u8:1+events_unbound	23:11:22	2
1511939	99	52	46,4	cyclictest	1742215	-21	kworker/u8:1+flush-8:0	23:01:20	1
1511933	99	52	37,5	cyclictest	282	-21	systemd-journal	19:48:15	0
1511933	99	51	40,9	cyclictest	1790713	-21	ntpq	23:46:12	0
1511939	99	50	42,5	cyclictest	282	-21	systemd-journal	20:44:59	1
1511943	99	48	43,3	cyclictest	1697467	-21	kworker/u8:2+events_unbound	00:01:23	2
1511939	99	48	42,4	cyclictest	1712012	-21	kworker/u8:3+flush-8:0	22:36:21	1
1511939	99	48	42,4	cyclictest	1712012	-21	kworker/u8:3+flush-8:0	22:36:20	1
1511943	99	47	43,3	cyclictest	1712012	-21	kworker/u8:3+flush-8:0	22:46:18	2
1511943	99	47	40,5	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	19:56:18	2
1511939	99	47	41,4	cyclictest	563790	-21	kworker/u8:3+flush-8:0	19:16:17	1
1511939	99	46	38,6	cyclictest	1528948	-21	apt-get	19:25:59	1
1511939	99	46	37,6	cyclictest	1164347	-21	kworker/u8:0+events_unbound	19:11:13	1
1511939	99	45	35,8	cyclictest	1553620	-21	/usr/sbin/munin	19:51:11	1
1511933	99	45	37,6	cyclictest	1558284	-21	latency_hist	19:55:01	0
1511939	99	44	37,5	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	20:01:13	1
1511933	99	44	35,7	cyclictest	1524268	-21	diskstats	19:21:05	0
1511943	99	43	39,3	cyclictest	1742215	-21	kworker/u8:1+events_unbound	23:01:11	2
1511939	99	43	34,7	cyclictest	1755876	-21	ntpq	23:11:14	1
1511943	99	42	38,3	cyclictest	1672520	-21	kworker/u8:0+flush-8:0	21:56:22	2
1511943	99	42	37,4	cyclictest	1523948	-21	kworker/u8:1+events_unbound	19:21:15	2
1511939	99	42	37,3	cyclictest	1578057	-21	kworker/u8:3+events_unbound	20:51:20	1
1511939	99	42	35,5	cyclictest	1523948	-21	kworker/u8:1+events_unbound	20:36:23	1
1511939	99	42	32,8	cyclictest	1626584	-21	ntpq	21:01:16	1
1511939	99	42	31,8	cyclictest	1697467	-21	kworker/u8:2+flush-8:0	00:21:14	1
1511939	99	41	36,4	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	19:31:18	1
1511933	99	41	33,6	cyclictest	1516820	-21	latency_hist	19:15:01	0
1511939	99	40	32,5	cyclictest	282	-21	systemd-journal	23:16:04	1
1768467	2	39	0,1	sleep1	1768471	-21	tr	23:26:10	1
1511943	99	39	35,3	cyclictest	1552503	-21	kworker/u8:0+events_unbound	20:06:16	2
1511939	99	39	34,4	cyclictest	1811185	-21	kworker/u8:1+flush-8:0	00:36:23	1
1511939	99	39	28,8	cyclictest	1572221	-21	ntpq	20:06:13	1
1511933	99	39	7,30	cyclictest	1761751	-21	kworker/0:1+events	23:20:55	0
1519093	2	38	0,5	sleep2	0	-21	swapper/2	19:16:02	2
1511939	99	38	31,5	cyclictest	1538796	-21	apt-get	19:35:59	1
1511939	99	38	27,8	cyclictest	1736112	-21	ntpq	22:51:17	1
1511943	99	37	31,4	cyclictest	1766667	-21	kworker/u8:3+flush-8:0	23:55:06	2
1511939	99	37	30,5	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	20:46:06	1
1511939	99	37	27,7	cyclictest	1617870	-21	/usr/sbin/munin	20:56:12	1
1511939	99	37	27,7	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	21:31:18	1
1511943	99	36	27,7	cyclictest	1687619	-21	awk	22:05:00	2
1511939	99	36	26,7	cyclictest	1811470	-21	latency_hist	00:10:01	1
1511933	99	36	30,5	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	19:56:04	0
1511933	99	36	30,4	cyclictest	282	-21	systemd-journal	23:56:05	0
1511943	99	35	27,6	cyclictest	282	-21	systemd-journal	20:16:57	2
1511939	99	35	29,4	cyclictest	1712012	-21	kworker/u8:3+events_unbound	22:31:05	1
1511939	99	35	29,4	cyclictest	1712012	-21	kworker/u8:3+events_unbound	22:31:05	1
1511939	99	35	29,4	cyclictest	1524018	-21	apt-get	19:21:01	1
1511939	99	35	28,5	cyclictest	1563202	-21	cron	20:00:00	1
1511939	99	35	26,7	cyclictest	1548708	-21	apt-get	19:45:58	1
1511939	99	35	24,9	cyclictest	282	-21	systemd-journal	21:30:01	1
1511933	99	35	31,3	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	20:56:14	0
1511933	99	35	25,7	cyclictest	282	-21	systemd-journal	00:40:00	0
1511933	99	35	24,10	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	19:41:18	0
1507152	2	35	4,10	sleep1	0	-21	swapper/1	19:05:54	1
1511939	99	34	27,5	cyclictest	1697467	-21	kworker/u8:2+events_unbound	22:56:17	1
1511939	99	34	25,6	cyclictest	1831251	-21	latency_hist	00:30:01	1
1511939	99	34	23,9	cyclictest	282	-21	systemd-journal	00:14:59	1
1511939	99	34	20,10	cyclictest	282	-21	systemd-journal	19:44:57	1
1511933	99	34	26,6	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	20:53:58	0
1511943	99	33	25,6	cyclictest	1657345	-21	awk	21:35:01	2
1511939	99	33	28,3	cyclictest	1523948	-21	kworker/u8:1+flush-8:0	20:16:19	1
1511939	99	33	28,3	cyclictest	1511805	-21	kworker/u8:2+flush-8:0	21:16:21	1
1511939	99	33	28,3	cyclictest	1511805	-21	kworker/u8:2+flush-8:0	21:16:21	1
1511939	99	33	27,4	cyclictest	1766667	-21	kworker/u8:3+flush-8:0	23:51:10	1
1511939	99	33	27,3	cyclictest	1672520	-21	kworker/u8:0+flush-8:0	22:01:18	1
1511939	99	33	25,6	cyclictest	1836188	-21	latency_hist	00:35:01	1
1511939	99	33	23,7	cyclictest	1776524	-21	apt-get	23:35:00	1
1511933	99	33	11,20	cyclictest	1657270	-21	kworker/0:1+events	21:46:16	0
1511943	99	32	28,3	cyclictest	563790	-21	kworker/u8:3+events_unbound	19:35:01	2
1511943	99	32	26,4	cyclictest	1658117	-21	tr	21:36:00	2
1511943	99	32	26,4	cyclictest	1658117	-21	tr	21:36:00	2
1511933	99	32	27,4	cyclictest	1677686	-21	kworker/u8:1+events_unbound	22:21:16	0
1511933	99	32	27,4	cyclictest	1511805	-21	kworker/u8:2+events_unbound	21:30:01	0
1511933	99	32	25,5	cyclictest	1523271	-21	grep	19:16:20	0
1511933	99	32	23,7	cyclictest	1726268	-21	ntpq	22:41:16	0
1511933	99	32	23,6	cyclictest	1572787	-21	grep	20:06:21	0
1511933	99	32	22,8	cyclictest	282	-21	systemd-journal	23:10:00	0
1511933	99	32	20,9	cyclictest	282	-21	systemd-journal	20:25:57	0
1511933	99	32	10,17	cyclictest	1568208	-21	kworker/0:2+events	21:31:00	0
1511943	99	31	26,4	cyclictest	1786664	-21	kworker/u8:0+events_unbound	23:50:30	2
1511939	99	31	25,4	cyclictest	1552503	-21	kworker/u8:0+flush-8:0	20:11:15	1
1511939	99	31	22,7	cyclictest	1677686	-21	kworker/u8:1+events_unbound	22:21:03	1
1511939	99	31	22,6	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	21:36:12	1
1511939	99	31	22,6	cyclictest	1578057	-21	kworker/u8:3+flush-8:0	21:36:12	1
1511939	99	31	18,9	cyclictest	282	-21	systemd-journal	22:20:00	1
1511933	99	31	8,17	cyclictest	1662558	-21	kworker/0:0+events	22:45:59	0
1511933	99	31	21,8	cyclictest	1582137	-21	ntpq	20:16:12	0
1511933	99	31	21,7	cyclictest	1786645	-21	latency_hist	23:45:01	0
1511939	99	30	25,3	cyclictest	1645013	-21	kthreadcore	21:21:11	1
1511939	99	30	24,4	cyclictest	1697467	-21	kworker/u8:2+events_unbound	23:36:03	1
1511933	99	30	6,23	cyclictest	1568208	-21	kworker/0:2+events	21:11:20	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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