OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot2.osadl.org (updated Thu Aug 06, 2026 12:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2300757	99	104	96,6	cyclictest	2423404	-21	kworker/u4:2+events_unbound	11:10:50	1
2300757	99	100	93,5	cyclictest	2405495	-21	kworker/u4:16+events_unbound	11:00:47	1
2300757	99	99	84,8	cyclictest	2307109	-21	kworker/u4:3+events_unbound	07:50:11	1
2300757	99	92	85,5	cyclictest	2312219	-21	kworker/u4:8+events_unbound	07:55:12	1
2300755	99	89	81,6	cyclictest	2331487	-21	kworker/u4:19+events_unbound	09:25:32	0
2300757	99	86	76,4	cyclictest	2481084	-21	kworker/u4:13+events_unbound	12:26:01	1
2300757	99	84	77,5	cyclictest	2301978	-21	kworker/u4:7+events_unbound	07:14:55	1
2300757	99	82	70,9	cyclictest	2458717	-21	kworker/u4:4+events_unbound	11:45:55	1
2300755	99	82	72,7	cyclictest	2462562	-21	kworker/u4:6+events_unbound	11:40:54	0
2300757	99	81	74,5	cyclictest	2309676	-21	kworker/u4:15+events_unbound	08:05:16	1
2300755	99	71	63,6	cyclictest	2300753	-21	cyclictest	10:06:58	0
2300757	99	65	52,10	cyclictest	2316462	-21	sshd	08:10:17	1
2300755	99	62	51,9	cyclictest	53	-21	kswapd0	12:05:09	0
2300755	99	62	51,9	cyclictest	53	-21	kswapd0	12:05:09	0
2300755	99	62	32,14	cyclictest	14	-21	ksoftirqd/0	12:30:19	0
2300755	99	61	49,8	cyclictest	2356264	-21	ssh	09:36:40	0
2300755	99	61	42,17	cyclictest	53	-21	kswapd0	09:40:09	0
2300755	99	61	14,17	cyclictest	2337016	-21	ntpq	09:15:24	0
2300755	99	60	49,8	cyclictest	2497725	-21	systemd	12:15:58	0
2300755	99	59	9,33	cyclictest	2300756	-21	idleruntime-cro	07:10:00	0
2300755	99	59	48,7	cyclictest	53	-21	kswapd0	11:00:12	0
2300755	99	58	53,3	cyclictest	15	1	ktimers/0	08:46:46	0
2300757	99	57	50,5	cyclictest	2304566	-21	kworker/u4:4+events_unbound	07:35:02	1
2300757	99	57	48,7	cyclictest	2324474	-21	sshd	08:40:24	1
2300757	99	57	48,7	cyclictest	2323165	-21	sshd	08:35:23	1
2300757	99	57	42,6	cyclictest	2454208	-21	kworker/u4:0+events_unbound	11:35:02	1
2300755	99	57	46,9	cyclictest	53	-21	kswapd0	10:20:10	0
2300757	99	56	47,7	cyclictest	400	-21	systemd-logind	11:50:54	1
2300755	99	56	47,7	cyclictest	53	-21	kswapd0	11:55:17	0
2300755	99	56	23,10	cyclictest	2332988	-21	sed	09:10:39	0
2300757	99	55	40,5	cyclictest	2462562	-21	kworker/u4:6+events_unbound	11:55:19	1
2300755	99	55	25,27	cyclictest	256	50	irq/23-42890000.ethernet	11:45:27	0
2300757	99	54	47,5	cyclictest	2373359	-21	mailstats	09:55:47	1
2300757	99	54	46,6	cyclictest	2356794	-21	kworker/u4:5+events_unbound	09:47:45	1
2300757	99	54	46,5	cyclictest	2300753	-21	cyclictest	10:39:21	1
2300755	99	54	42,9	cyclictest	2356793	-21	kworker/u4:1+events_unbound	09:55:36	0
2300755	99	54	38,10	cyclictest	2318626	-21	modprobe	08:19:59	0
2300755	99	54	16,19	cyclictest	0	-21	swapper/0	10:15:37	0
2300755	99	54	12,19	cyclictest	2467709	-21	kworker/u4:3+xprtiod	11:50:40	0
2300757	99	53	46,5	cyclictest	2489990	-21	kworker/u4:10+events_unbound	12:07:45	1
2300757	99	53	46,5	cyclictest	2489990	-21	kworker/u4:10+events_unbound	12:07:44	1
2300757	99	53	44,6	cyclictest	2310793	-21	timerwakeupswit	07:45:37	1
2300755	99	53	9,22	cyclictest	2492619	-21	ssh	12:10:33	0
2300755	99	53	44,7	cyclictest	2364210	-21	/usr/sbin/munin	09:45:37	0
2300755	99	53	42,8	cyclictest	2440223	-21	systemd	11:10:49	0
2300755	99	53	18,9	cyclictest	2316248	-21	apt-get	08:10:12	0
2300755	99	53	11,15	cyclictest	2353177	-21	ssh	09:33:48	0
2300755	99	52	8,25	cyclictest	2514951	-21	/usr/sbin/munin	12:35:37	0
2300755	99	52	5,21	cyclictest	2417551	-21	ntpq	10:45:34	0
2300755	99	52	42,6	cyclictest	0	-21	swapper/0	10:00:38	0
2300755	99	52	19,9	cyclictest	256	50	irq/23-42890000.ethernet	10:40:01	0
2300755	99	52	16,6	cyclictest	2304764	-21	apt-get	07:25:13	0
2300755	99	52	11,16	cyclictest	2463307	-21	ssh	11:37:17	0
2300755	99	52	11,15	cyclictest	2399040	-21	ssh	10:25:12	0
2300757	99	51	45,4	cyclictest	2383544	-21	kworker/u4:3+events_unbound	10:19:57	1
2300757	99	51	43,6	cyclictest	2454208	-21	kworker/u4:0+events_unbound	11:27:46	1
2300757	99	51	43,5	cyclictest	2425641	-21	aten_r7power_en	10:55:17	1
2300757	99	51	41,8	cyclictest	2331521	-21	diskmemload	12:16:56	1
2300757	99	51	41,4	cyclictest	2309675	-21	kworker/u4:13+events_unbound	08:00:02	1
2300757	99	51	41,4	cyclictest	2309675	-21	kworker/u4:13+events_unbound	08:00:02	1
2300755	99	51	7,20	cyclictest	2422223	-21	find	10:50:40	0
2300755	99	51	6,21	cyclictest	0	-21	swapper/0	11:25:26	0
2300755	99	51	41,7	cyclictest	2448709	-21	mailstats	11:20:39	0
2300755	99	51	18,6	cyclictest	2302181	-21	apt-get	07:15:12	0
2300755	99	51	14,22	cyclictest	2435426	-21	grep	11:05:38	0
2300757	99	50	44,4	cyclictest	2367774	-21	/usr/sbin/munin	09:50:14	1
2300757	99	50	44,4	cyclictest	2310949	-21	kworker/u4:6+events_unbound	08:30:03	1
2300757	99	50	43,5	cyclictest	2462562	-21	kworker/u4:6+events_unbound	11:41:45	1
2300757	99	50	41,6	cyclictest	1073	-21	snmpd	10:47:04	1
2300755	99	50	6,10	cyclictest	2505964	-21	ntpq	12:25:35	0
2300755	99	50	46,3	cyclictest	15	1	ktimers/0	07:31:42	0
2300755	99	50	45,3	cyclictest	2309676	-21	kworker/u4:15+events_unbound	09:20:34	0
2300755	99	50	45,3	cyclictest	2309676	-21	kworker/u4:15+events_unbound	09:20:34	0
2300755	99	50	43,5	cyclictest	531	-21	in:imuxsock	08:20:20	0
2300755	99	50	4,23	cyclictest	2405120	-21	ssh	10:31:09	0
2300755	99	50	28,19	cyclictest	0	-21	swapper/0	09:50:18	0
2300755	99	50	1,24	cyclictest	0	-21	swapper/0	10:55:31	0
2300755	99	50	11,15	cyclictest	2502337	-21	ssh	12:21:13	0
2300755	99	50	11,13	cyclictest	2444092	-21	ntpq	11:15:36	0
2300755	99	50	10,15	cyclictest	2309220	-21	ntpq	07:40:28	0
2300757	99	49	41,6	cyclictest	2480438	-21	kworker/u4:12+events_unbound	12:21:46	1
2300755	99	49	38,8	cyclictest	2457141	-21	/usr/sbin/munin	11:30:23	0
2300755	99	49	38,8	cyclictest	2327954	-21	aten_r7power_vo	08:55:15	0
2300755	99	49	36,10	cyclictest	2326892	-21	fschecks_time	08:50:22	0
2300755	99	49	25,4	cyclictest	0	-21	swapper/0	10:10:18	0
2300755	99	49	11,11	cyclictest	2321205	-21	munin-run	08:30:01	0
2300755	99	49	11,10	cyclictest	2415311	-21	ssh	10:43:18	0
2300755	99	49	10,14	cyclictest	2312957	-21	ntpq	07:55:26	0
2300757	99	48	42,4	cyclictest	2395529	-21	systemd	10:20:39	1
2300757	99	48	41,5	cyclictest	2340959	-21	aten_r7power_po	09:20:17	1
2300757	99	48	41,5	cyclictest	2340959	-21	aten_r7power_po	09:20:16	1
2300757	99	48	41,5	cyclictest	2300753	-21	cyclictest	10:40:43	1
2300757	99	48	40,6	cyclictest	2451930	-21	latency_hist	11:25:01	1
2300757	99	48	3,38	cyclictest	2435226	-21	ssh	11:05:34	1
2300757	99	48	31,6	cyclictest	2481084	-21	kworker/u4:13+events_unbound	12:32:26	1
2300757	99	48	20,6	cyclictest	26	1	rcuc/1	10:30:14	1
2300755	99	48	9,14	cyclictest	2315524	-21	ntpq	08:05:23	0
2300755	99	48	27,18	cyclictest	0	-21	swapper/0	07:20:11	0
2300757	99	47	41,5	cyclictest	2303255	-21	kworker/u4:10+events_unbound	07:16:45	1
2300757	99	47	40,5	cyclictest	2336499	-21	cpu	09:15:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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