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
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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 50 highest latencies:

System rack5slot4s.osadl.org (updated Thu Jun 04, 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
2405129	2	91	0,3	chrt	0	-21	swapper/0	11:00:41	0
2495430	2	84	0,3	chrt	75	-21	kworker/3:1-events	12:30:40	3
2173304	99	63	58,3	cyclictest	2205225	-21	kworker/u8:2+events_unbound	09:50:50	0
2173304	99	62	54,6	cyclictest	2244829	-21	/usr/sbin/munin	08:20:51	0
2173312	99	61	40,17	cyclictest	2218989	-21	ntpq	07:50:49	1
2173312	99	60	51,7	cyclictest	2417793	-21	ntpq	11:10:45	1
2173312	99	59	50,6	cyclictest	2384093	-21	latency_hist	10:40:01	1
2173312	99	59	50,6	cyclictest	2384093	-21	latency_hist	10:40:00	1
2173304	99	57	54,2	cyclictest	2369251	-21	kworker/u8:1+events_unbound	10:41:54	0
2173312	99	55	38,14	cyclictest	2422975	-21	ntpq	11:15:45	1
2173312	99	54	48,4	cyclictest	2487899	-21	ntpq	12:20:49	1
2173304	99	54	46,6	cyclictest	2294233	-21	apt-get	09:10:01	0
2173304	99	53	49,3	cyclictest	2234881	-21	kworker/u8:0+events_unbound	09:45:51	0
2173312	99	52	41,8	cyclictest	2358225	-21	ntpq	10:10:45	1
2173312	99	52	36,13	cyclictest	2248615	-21	ntpq	08:20:46	1
2173312	99	52	33,12	cyclictest	16	1	rcu_preempt	10:00:42	1
2173304	99	52	49,2	cyclictest	2483970	-21	kworker/u8:3+events_unbound	12:30:50	0
2173304	99	51	48,2	cyclictest	2030499	-21	kworker/u8:1+events_unbound	07:25:49	0
2173318	99	50	31,16	cyclictest	2289045	-21	apt-get	09:05:01	2
2173312	99	50	29,17	cyclictest	1704890	-21	systemd-journal	09:30:50	1
2173304	99	50	46,3	cyclictest	2438721	-21	kworker/u8:1+events_unbound	11:45:37	0
2173304	99	49	46,2	cyclictest	2468946	-21	kworker/u8:1+events_unbound	12:15:54	0
2173304	99	49	45,3	cyclictest	2224789	-21	kworker/u8:3+events_unbound	08:30:35	0
2173304	99	48	44,3	cyclictest	2224789	-21	kworker/u8:3+events_unbound	09:34:51	0
2173304	99	48	44,3	cyclictest	2205225	-21	kworker/u8:2+events_unbound	09:15:36	0
2173304	99	48	40,6	cyclictest	2468963	-21	/usr/sbin/munin	12:05:46	0
2173304	99	48	40,6	cyclictest	2468963	-21	/usr/sbin/munin	12:05:45	0
2173304	99	47	43,3	cyclictest	2234881	-21	kworker/u8:0+events_unbound	09:27:51	0
2173304	99	47	39,3	cyclictest	2030499	-21	kworker/u8:1+events_unbound	07:48:50	0
2173318	99	45	29,14	cyclictest	2199216	-21	ntpq	07:30:50	2
2173304	99	45	42,2	cyclictest	2454036	-21	kworker/u8:0+events_unbound	12:00:53	0
2173304	99	45	40,4	cyclictest	2418370	-21	kworker/u8:0+events_unbound	11:29:51	0
2173318	99	44	37,4	cyclictest	1704890	-21	systemd-journal	12:00:00	2
2173318	99	44	29,13	cyclictest	1704890	-21	systemd-journal	12:10:00	2
2173318	99	44	29,13	cyclictest	1704890	-21	systemd-journal	12:10:00	2
2173304	99	44	41,2	cyclictest	2205225	-21	kworker/u8:2+events_unbound	10:00:57	0
2173304	99	44	40,3	cyclictest	2224789	-21	kworker/u8:3+events_unbound	10:39:52	0
2173304	99	44	40,3	cyclictest	2224789	-21	kworker/u8:3+events_unbound	10:39:51	0
2173304	99	44	40,3	cyclictest	2205225	-21	kworker/u8:2+events_unbound	09:00:36	0
2173304	99	44	40,3	cyclictest	1341629	-21	kworker/u8:4+events_unbound	07:35:20	0
2173312	99	43	16,15	cyclictest	0	-21	swapper/1	11:35:50	1
2173312	99	43	1,29	cyclictest	589	-21	runrttasks	08:15:35	1
2173304	99	43	39,3	cyclictest	2454036	-21	kworker/u8:0+events_unbound	12:10:36	0
2173304	99	43	39,3	cyclictest	2205225	-21	kworker/u8:2+events_unbound	07:54:52	0
2173312	99	42	34,6	cyclictest	2428887	-21	latency_hist	11:25:01	1
2173304	99	42	38,3	cyclictest	2438721	-21	kworker/u8:1+events_unbound	11:33:51	0
2173304	99	42	38,3	cyclictest	2369251	-21	kworker/u8:1+events_unbound	11:15:05	0
2173304	99	42	38,3	cyclictest	2234881	-21	kworker/u8:0+events_unbound	08:25:55	0
2173304	99	42	38,3	cyclictest	1340637	-21	kworker/u8:0+events_unbound	07:20:18	0
2173304	99	42	38,3	cyclictest	1340637	-21	kworker/u8:0+events_unbound	07:20:18	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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