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 Sat Nov 29, 2025 12:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2180439	2	80	0,6	sleep2	0	-21	swapper/2	09:11:19	2
2054920	99	61	50,8	cyclictest	282	-21	systemd-journal	07:56:25	1
2054920	99	61	50,5	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	11:01:21	1
2054920	99	60	51,7	cyclictest	2209096	-21	kworker/u8:1+events_unbound	11:11:21	1
2054920	99	59	51,6	cyclictest	2368205	-21	kworker/u8:3+flush-8:0	12:26:27	1
2054920	99	58	50,6	cyclictest	2096702	-21	kworker/u8:0+flush-8:0	09:06:24	1
2054916	99	57	47,8	cyclictest	2314822	-21	ntpq	11:26:24	0
2054920	99	55	50,4	cyclictest	2186539	-21	kworker/u8:0+flush-8:0	09:21:26	1
2054920	99	54	48,4	cyclictest	2236241	-21	kworker/u8:0+events_unbound	10:16:29	1
2054920	99	54	46,5	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	07:51:21	1
2054925	99	53	47,4	cyclictest	2040055	-21	kworker/u8:4+events_unbound	08:21:23	2
2054920	99	53	46,5	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	11:36:22	1
2054920	99	52	45,5	cyclictest	2328470	-21	kworker/u8:2+events_unbound	11:46:28	1
2054920	99	52	45,5	cyclictest	2186548	-21	kworker/u8:4+flush-8:0	09:51:22	1
2054920	99	52	45,5	cyclictest	2186548	-21	kworker/u8:4+flush-8:0	09:51:22	1
2054920	99	51	46,3	cyclictest	2176122	-21	kworker/u8:2+flush-8:0	09:11:25	1
2054920	99	51	45,3	cyclictest	2040055	-21	kworker/u8:4+events_unbound	08:01:28	1
2054920	99	51	44,5	cyclictest	2273548	-21	kworker/u8:3+flush-8:0	11:26:23	1
2054920	99	51	44,5	cyclictest	2096702	-21	kworker/u8:0+flush-8:0	08:46:20	1
2054920	99	51	44,4	cyclictest	2186548	-21	kworker/u8:4+events_unbound	10:01:11	1
2054920	99	51	43,5	cyclictest	2236241	-21	kworker/u8:0+events_unbound	10:26:13	1
2054916	99	51	46,3	cyclictest	1998356	-21	kworker/u8:2+flush-8:0	07:20:00	0
2054920	99	50	46,3	cyclictest	2081025	-21	kworker/u8:2+events_unbound	07:36:29	1
2054920	99	50	43,5	cyclictest	2096702	-21	kworker/u8:0+events_unbound	08:56:23	1
2054920	99	50	43,4	cyclictest	2171180	-21	kworker/u8:3+flush-8:0	09:16:20	1
2054920	99	49	43,4	cyclictest	2096702	-21	kworker/u8:0+events_unbound	08:36:20	1
2054920	99	49	42,5	cyclictest	2186539	-21	kworker/u8:0+flush-8:0	09:26:22	1
2054920	99	49	42,5	cyclictest	1998356	-21	kworker/u8:2+flush-8:0	07:16:27	1
2054925	99	48	41,5	cyclictest	2240978	-21	gpgv	10:15:00	2
2054920	99	48	44,3	cyclictest	2096702	-21	kworker/u8:0+events_unbound	08:11:12	1
2054920	99	48	42,4	cyclictest	2186539	-21	kworker/u8:0+flush-8:0	09:31:24	1
2054920	99	48	41,5	cyclictest	2209096	-21	kworker/u8:1+events_unbound	10:46:12	1
2054916	99	48	39,6	cyclictest	2071916	-21	latency_hist	07:25:01	0
2054920	99	47	39,5	cyclictest	2368205	-21	kworker/u8:3+flush-8:0	12:21:22	1
2054916	99	47	37,7	cyclictest	282	-21	systemd-journal	07:51:24	0
2054925	99	46	40,4	cyclictest	2072143	-21	kworker/u8:0+flush-8:0	07:31:21	2
2054920	99	46	40,4	cyclictest	2328470	-21	kworker/u8:2+flush-8:0	11:56:13	1
2054920	99	46	39,5	cyclictest	2236241	-21	kworker/u8:0+flush-8:0	10:51:27	1
2054920	99	45	40,4	cyclictest	2209096	-21	kworker/u8:1+events_unbound	09:56:24	1
2054920	99	45	40,4	cyclictest	2186539	-21	kworker/u8:0+events_unbound	09:36:15	1
2054920	99	44	39,4	cyclictest	2186548	-21	kworker/u8:4+events_unbound	10:31:23	1
2054920	99	44	39,3	cyclictest	2059886	-21	kworker/u8:1+events_unbound	07:26:23	1
2054920	99	44	38,4	cyclictest	2368205	-21	kworker/u8:3+events_unbound	12:31:21	1
2054920	99	44	38,4	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	09:46:18	1
2054920	99	44	37,5	cyclictest	2345617	-21	kworker/u8:0+flush-8:0	12:16:28	1
2054920	99	44	37,5	cyclictest	2345617	-21	kworker/u8:0+flush-8:0	12:16:28	1
2054920	99	44	37,5	cyclictest	2328470	-21	kworker/u8:2+flush-8:0	11:51:12	1
2054925	99	43	37,4	cyclictest	2280526	-21	kworker/u8:2+events_unbound	10:56:09	2
2054925	99	43	36,5	cyclictest	2106862	-21	kworker/u8:1+events_unbound	08:31:26	2
2054920	99	43	40,2	cyclictest	2328470	-21	kworker/u8:2+events_unbound	12:01:27	1
2054920	99	43	39,3	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	09:41:25	1
2054920	99	43	38,4	cyclictest	2236241	-21	kworker/u8:0+flush-8:0	10:21:12	1
2054920	99	43	38,4	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	11:21:43	1
2054920	99	43	35,6	cyclictest	2209096	-21	kworker/u8:1+events_unbound	11:16:23	1
2054916	99	43	33,7	cyclictest	2374458	-21	ntpq	12:26:22	0
2054925	99	42	37,4	cyclictest	2123095	-21	kworker/u8:2+events_unbound	08:16:19	2
2054920	99	42	38,3	cyclictest	2280526	-21	kworker/u8:2+events_unbound	10:56:27	1
2054920	99	42	37,4	cyclictest	2260683	-21	kworker/u8:2+events_unbound	10:41:23	1
2054920	99	42	37,3	cyclictest	2328470	-21	kworker/u8:2+events_unbound	12:06:24	1
2054920	99	42	37,3	cyclictest	2106862	-21	kworker/u8:1+events_unbound	09:01:23	1
2054916	99	42	38,3	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	11:11:25	0
2054916	99	42	36,4	cyclictest	2328470	-21	kworker/u8:2+events_unbound	11:56:27	0
2054916	99	42	31,8	cyclictest	2356073	-21	diskstats	12:11:12	0
2054916	99	42	31,8	cyclictest	2356073	-21	diskstats	12:11:12	0
2054925	99	41	37,3	cyclictest	2273548	-21	kworker/u8:3+flush-8:0	10:46:23	2
2054920	99	41	35,5	cyclictest	2096702	-21	kworker/u8:0+events_unbound	08:51:12	1
2054916	99	41	35,4	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	07:41:25	0
2054916	99	41	35,4	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	07:41:24	0
2054920	99	40	35,4	cyclictest	2273548	-21	kworker/u8:3+events_unbound	11:31:22	1
2054920	99	40	35,4	cyclictest	2273548	-21	kworker/u8:3+events_unbound	11:31:22	1
2054920	99	40	35,4	cyclictest	2209096	-21	kworker/u8:1+flush-8:0	11:41:15	1
2054920	99	40	35,4	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	08:21:27	1
2054920	99	40	34,5	cyclictest	2096702	-21	kworker/u8:0+flush-8:0	08:41:22	1
2054920	99	40	33,5	cyclictest	2209096	-21	kworker/u8:1+events_unbound	10:11:15	1
2054920	99	40	31,6	cyclictest	282	-21	systemd-journal	08:30:00	1
2054920	99	40	30,7	cyclictest	282	-21	systemd-journal	07:22:09	1
2054916	99	40	34,4	cyclictest	2186539	-21	kworker/u8:0+events_unbound	09:36:26	0
2054916	99	40	28,9	cyclictest	2186612	-21	/usr/sbin/munin	09:21:22	0
2054925	99	39	35,3	cyclictest	2081025	-21	kworker/u8:2+events_unbound	07:36:18	2
2054925	99	39	34,4	cyclictest	2340352	-21	kworker/u8:3+flush-8:0	12:01:22	2
2054920	99	39	35,3	cyclictest	2260683	-21	kworker/u8:2+flush-8:0	10:36:27	1
2054916	99	39	32,4	cyclictest	2076852	-21	latency_hist	07:30:01	0
2054916	99	39	31,6	cyclictest	2186548	-21	kworker/u8:4+flush-8:0	10:31:15	0
2054916	99	39	29,7	cyclictest	2266251	-21	/usr/sbin/munin	10:41:20	0
2054920	99	38	28,8	cyclictest	2291289	-21	apt-get	11:06:07	1
2054916	99	38	32,4	cyclictest	2186548	-21	kworker/u8:4+flush-8:0	09:41:11	0
2054925	99	37	32,4	cyclictest	2096702	-21	kworker/u8:0+events_unbound	08:51:22	2
2054925	99	37	30,5	cyclictest	2260683	-21	kworker/u8:2+flush-8:0	10:36:29	2
2054920	99	37	33,3	cyclictest	2106862	-21	kworker/u8:1+events_unbound	08:31:18	1
2054920	99	36	31,4	cyclictest	2059886	-21	kworker/u8:1+flush-8:0	07:46:27	1
2054916	99	36	28,5	cyclictest	2225924	-21	latency_hist	10:00:00	0
2054920	99	35	31,3	cyclictest	2358497	-21	kworker/u8:1+flush-8:0	12:11:27	1
2054920	99	35	31,3	cyclictest	2358497	-21	kworker/u8:1+flush-8:0	12:11:27	1
2054920	99	35	31,3	cyclictest	2096702	-21	kworker/u8:0+flush-8:0	08:06:42	1
2054916	99	35	28,4	cyclictest	2081025	-21	kworker/u8:2+flush-8:0	07:31:26	0
2054925	99	34	28,5	cyclictest	282	-21	systemd-journal	09:45:00	2
2054920	99	34	30,3	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	07:41:29	1
2054920	99	34	30,3	cyclictest	2040055	-21	kworker/u8:4+flush-8:0	07:41:29	1
2054920	99	34	25,7	cyclictest	2077186	-21	apt-get	07:31:06	1
2054916	99	34	27,5	cyclictest	282	-21	systemd-journal	10:36:36	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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