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 21, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
936185	2	105	0,3	sleep3	75	-21	kworker/3:1-events	20:20:40	3
1144318	2	81	0,6	sleep3	45	1	irq_work/3	23:50:38	3
860317	99	73	68,4	cyclictest	1144546	-21	kworker/u8:3+flush-8:0	00:10:37	2
860317	99	73	68,4	cyclictest	1144546	-21	kworker/u8:3+flush-8:0	00:10:36	2
860317	99	73	68,3	cyclictest	834152	-21	kworker/u8:1+events_unbound	22:50:39	2
860313	99	73	63,8	cyclictest	1139259	-21	ntpq	23:45:36	1
860317	99	71	67,3	cyclictest	834152	-21	kworker/u8:1+events_unbound	22:30:39	2
860313	99	69	37,8	cyclictest	1704890	-21	systemd-journal	19:44:59	1
860311	99	69	64,3	cyclictest	834152	-21	kworker/u8:1+events_unbound	22:00:34	0
860311	99	69	0,65	cyclictest	1	-21	systemd	19:15:01	0
860317	99	68	58,8	cyclictest	1021008	-21	cp	21:50:00	2
860317	99	67	62,4	cyclictest	834152	-21	kworker/u8:1+events_unbound	23:00:37	2
860311	99	67	58,7	cyclictest	871098	-21	ntpq	19:15:33	0
860317	99	65	60,3	cyclictest	1075568	-21	kworker/u8:0+events_unbound	23:45:21	2
860313	99	65	58,5	cyclictest	965603	-21	ntpq	20:50:34	1
860313	99	65	58,5	cyclictest	965603	-21	ntpq	20:50:34	1
860317	99	64	59,4	cyclictest	834152	-21	kworker/u8:1+flush-8:0	22:05:40	2
860311	99	64	55,7	cyclictest	1020931	-21	gpgv	21:50:01	0
860311	99	63	51,9	cyclictest	912306	-21	diskstats	20:00:25	0
1134526	2	60	0,2	chrt	75	-21	kworker/3:1+events	23:40:38	3
860313	99	57	49,5	cyclictest	1059771	-21	ntpq	22:25:34	1
860311	99	57	51,4	cyclictest	1124818	-21	kworker/u8:3+events_unbound	23:40:00	0
860311	99	57	33,21	cyclictest	1160162	-21	/usr/sbin/munin	00:10:32	0
860311	99	57	33,21	cyclictest	1160162	-21	/usr/sbin/munin	00:10:32	0
860311	99	56	50,4	cyclictest	1075568	-21	kworker/u8:0+flush-8:0	23:55:35	0
860317	99	55	51,3	cyclictest	1124818	-21	kworker/u8:3+events_unbound	23:40:31	2
860313	99	54	44,8	cyclictest	1154082	-21	ntpq	00:00:33	1
860311	99	54	42,9	cyclictest	1110696	-21	diskstats	23:20:24	0
860311	99	54	33,18	cyclictest	1060707	-21	latency_hist	22:30:01	0
1037224	2	53	0,1	sleep1	1037226	-21	grep	22:05:29	1
860313	99	52	45,5	cyclictest	845092	-21	kworker/u8:3+flush-8:0	19:25:38	1
860313	99	52	43,6	cyclictest	970571	-21	ntpq	20:55:33	1
860313	99	52	43,6	cyclictest	970571	-21	ntpq	20:55:33	1
860313	99	51	45,4	cyclictest	860183	-21	kworker/u8:0+events_unbound	21:00:40	1
860311	99	51	42,7	cyclictest	1085665	-21	/usr/sbin/munin	22:55:37	0
860313	99	50	44,4	cyclictest	864273	-21	ntpq	19:10:34	1
860313	99	50	41,7	cyclictest	980527	-21	ntpq	21:05:35	1
860313	99	49	41,6	cyclictest	867357	-21	apt-get	19:15:20	1
860311	99	49	39,8	cyclictest	1140324	-21	/usr/sbin/munin	23:50:31	0
860311	99	48	44,3	cyclictest	834152	-21	kworker/u8:1+events_unbound	23:25:42	0
860311	99	48	36,9	cyclictest	1081025	-21	diskstats	22:50:24	0
860313	99	47	41,4	cyclictest	845092	-21	kworker/u8:3+events_unbound	19:45:01	1
860313	99	47	38,6	cyclictest	1065665	-21	latency_hist	22:35:00	1
860313	99	47	37,7	cyclictest	860183	-21	kworker/u8:0+events_unbound	20:25:33	1
860311	99	47	36,9	cyclictest	1704890	-21	systemd-journal	22:30:31	0
860311	99	47	35,9	cyclictest	1180218	-21	diskstats	00:30:24	0
860317	99	46	42,3	cyclictest	845092	-21	kworker/u8:3+events_unbound	21:15:38	2
860317	99	46	36,7	cyclictest	1130260	-21	cat	23:40:01	2
860313	99	46	39,5	cyclictest	912057	-21	apt-get	20:00:20	1
860313	99	46	36,7	cyclictest	860183	-21	kworker/u8:0+events_unbound	20:20:34	1
860313	99	46	32,11	cyclictest	1129963	-21	apt-get	23:40:00	1
860313	99	45	36,6	cyclictest	952013	-21	apt-get	20:40:20	1
860313	99	45	35,8	cyclictest	876071	-21	ntpq	19:20:34	1
860311	99	45	27,16	cyclictest	876023	-21	needreboot	19:20:31	0
860311	99	45	17,16	cyclictest	1076008	-21	cpuspeed	22:45:22	0
860313	99	44	34,7	cyclictest	845092	-21	kworker/u8:3+flush-8:0	21:10:32	1
860311	99	44	37,5	cyclictest	1011565	-21	diskstats	21:40:23	0
860311	99	43	36,5	cyclictest	834152	-21	kworker/u8:1+flush-8:0	23:10:43	0
860311	99	43	35,6	cyclictest	1021043	-21	kworker/u8:2+flush-8:0	00:00:31	0
860311	99	43	34,6	cyclictest	1174767	-21	latency_hist	00:25:01	0
860311	99	43	11,3	cyclictest	42	1	rcuog/2	19:45:33	0
860313	99	42	34,5	cyclictest	1165146	-21	apt-get	00:15:21	1
860313	99	42	34,5	cyclictest	1165146	-21	apt-get	00:15:20	1
860313	99	42	32,7	cyclictest	845092	-21	kworker/u8:3+flush-8:0	21:30:37	1
860317	99	41	37,3	cyclictest	860183	-21	kworker/u8:0+events_unbound	20:10:00	2
860311	99	41	1,28	cyclictest	911483	-21	sshd	19:56:32	0
860313	99	40	31,6	cyclictest	886872	-21	latency_hist	19:35:01	1
860313	99	40	30,7	cyclictest	1704890	-21	systemd-journal	21:45:00	1
860311	99	40	32,6	cyclictest	991530	-21	/usr/sbin/munin	21:20:33	0
860311	99	40	20,17	cyclictest	1050816	-21	latency_hist	22:20:01	0
860313	99	39	31,6	cyclictest	1046151	-21	apt-get	22:15:20	1
860313	99	39	31,5	cyclictest	1704890	-21	systemd-journal	23:29:30	1
860313	99	39	29,7	cyclictest	1704890	-21	systemd-journal	23:11:32	1
860313	99	39	29,6	cyclictest	1704890	-21	systemd-journal	20:05:31	1
860313	99	38	30,6	cyclictest	845092	-21	kworker/u8:3+flush-8:0	21:45:24	1
860313	99	38	30,5	cyclictest	860183	-21	kworker/u8:0+flush-8:0	19:35:25	1
860313	99	38	27,7	cyclictest	1704890	-21	systemd-journal	23:51:31	1
860311	99	38	31,5	cyclictest	986553	-21	/usr/sbin/munin	21:15:33	0
860311	99	38	25,11	cyclictest	941637	-21	true	20:29:59	0
860311	99	38	15,21	cyclictest	0	-21	swapper/0	20:40:00	0
860317	99	37	32,3	cyclictest	834152	-21	kworker/u8:1+events_unbound	21:40:21	2
860313	99	37	31,4	cyclictest	1105486	-21	apt-get	23:15:18	1
860317	99	36	27,7	cyclictest	1145311	-21	apt-get	23:55:21	2
860313	99	36	28,6	cyclictest	1155504	-21	diskstats	00:05:24	1
860313	99	36	28,6	cyclictest	1155504	-21	diskstats	00:05:23	1
860313	99	36	27,6	cyclictest	1075568	-21	kworker/u8:0+events_unbound	23:55:28	1
860313	99	36	25,7	cyclictest	1704890	-21	systemd-journal	20:10:32	1
860311	99	36	29,5	cyclictest	906834	-21	latency_hist	19:55:01	0
860311	99	36	21,13	cyclictest	1109783	-21	unixbench_singl	23:15:38	0
860311	99	36	19,15	cyclictest	966164	-21	unixbench_singl	20:50:42	0
860311	99	36	19,15	cyclictest	966164	-21	unixbench_singl	20:50:42	0
860311	99	36	19,15	cyclictest	1179313	-21	unixbench_singl	00:25:41	0
860311	99	36	17,17	cyclictest	401	-21	dbus-daemon	21:30:00	0
860311	99	36	16,17	cyclictest	930840	-21	ntpq	20:15:34	0
859899	2	36	4,10	sleep1	0	-21	swapper/1	19:07:18	1
860313	99	35	32,2	cyclictest	834152	-21	kworker/u8:1+flush-8:0	19:54:38	1
860313	99	35	29,4	cyclictest	834152	-21	kworker/u8:1+flush-8:0	22:00:24	1
860313	99	35	28,5	cyclictest	1001144	-21	cron	21:30:00	1
860311	99	35	9,3	cyclictest	1069785	-21	ntpq	22:35:38	0
860311	99	35	32,2	cyclictest	845092	-21	kworker/u8:3+flush-8:0	21:30:26	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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