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 792 highest latencies:

System rack7slot2.osadl.org (updated Tue Aug 25, 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
2305346	99	104	97,5	cyclictest	2388814	-21	kworker/u4:8+events_unbound	10:24:44	1
2305346	99	99	91,6	cyclictest	2315609	-21	kworker/u4:8+events_unbound	08:24:23	1
2305346	99	93	86,5	cyclictest	2379694	-21	kworker/u4:1+events_unbound	10:04:40	1
2305346	99	92	85,5	cyclictest	2326005	-21	kworker/u4:7+events_unbound	09:04:28	1
2305346	99	91	84,5	cyclictest	2464121	-21	kworker/u4:1+events_unbound	11:39:53	1
2305346	99	91	84,5	cyclictest	2301630	-21	kworker/u4:7+events_unbound	07:29:15	1
2305346	99	91	82,7	cyclictest	2499481	-21	kworker/u4:5+events_unbound	12:24:59	1
2305346	99	88	81,5	cyclictest	2336306	-21	kworker/u4:16+events_unbound	09:09:28	1
2305346	99	87	81,4	cyclictest	2326000	-21	kworker/u4:0+events_unbound	08:44:24	1
2305346	99	84	69,7	cyclictest	2464126	-21	kworker/u4:12+events_unbound	11:44:53	1
2305346	99	83	77,4	cyclictest	2316966	-21	kworker/u4:13+events_unbound	08:04:19	1
2305346	99	83	75,6	cyclictest	2316967	-21	kworker/u4:14+events_unbound	07:54:19	1
2305346	99	82	74,6	cyclictest	2379694	-21	kworker/u4:1+events_unbound	10:09:42	1
2305345	99	81	63,16	cyclictest	2379695	-21	kworker/u4:6+events_unbound	10:34:44	0
2305345	99	79	61,6	cyclictest	2433199	-21	kworker/u4:1+events_unbound	10:59:46	0
2305345	99	79	45,29	cyclictest	2507348	-21	timerwakeupswit	12:20:40	0
2305346	99	78	66,5	cyclictest	2307835	-21	kworker/u4:10+events_unbound	08:09:21	1
2305345	99	78	58,17	cyclictest	2477646	-21	kworker/u4:3+events_unbound	12:30:00	0
2305346	99	77	69,6	cyclictest	2331198	-21	kworker/u4:14+events_unbound	08:49:25	1
2305345	99	77	55,18	cyclictest	53	-21	kswapd0	10:05:07	0
2305345	99	76	63,10	cyclictest	2471061	-21	fschecks_count	11:40:20	0
2305345	99	73	29,40	cyclictest	2476148	-21	mailstats	11:45:37	0
2305345	99	72	7,16	cyclictest	2427228	-21	ssh	10:50:35	0
2305345	99	72	34,31	cyclictest	2459617	-21	kworker/u4:6-rpciod	11:55:16	0
2305345	99	72	1,34	cyclictest	2439483	-21	sed	11:05:01	0
2305345	99	69	6,10	cyclictest	2373542	-21	ssh	09:50:24	0
2305345	99	69	6,10	cyclictest	2373542	-21	ssh	09:50:24	0
2305345	99	69	37,30	cyclictest	2321891	-21	switchtime	08:10:36	0
2305345	99	69	36,30	cyclictest	256	50	irq/23-42890000.ethernet	08:00:11	0
2305345	99	69	35,31	cyclictest	2462256	-21	gltestperf	11:30:19	0
2305345	99	68	37,28	cyclictest	2342247	-21	ssh	09:15:38	0
2305345	99	68	36,29	cyclictest	2519154	-21	latency_hist	12:35:00	0
2305345	99	68	32,32	cyclictest	256	50	irq/23-42890000.ethernet	10:19:59	0
2305346	99	67	59,6	cyclictest	2517540	-21	kworker/u4:2+events_unbound	12:35:03	1
2305346	99	67	49,11	cyclictest	2381736	-21	latency_hist	10:00:01	1
2305345	99	67	28,36	cyclictest	2404337	-21	cut	10:25:18	0
2305345	99	67	28,35	cyclictest	0	-21	swapper/0	08:30:39	0
2305346	99	66	59,5	cyclictest	2421642	-21	apt-get	10:45:16	1
2305345	99	66	34,29	cyclictest	2413985	-21	ps	10:35:36	0
2305345	99	66	34,29	cyclictest	2391220	-21	fschecks_count	10:10:19	0
2305345	99	66	31,32	cyclictest	2315391	-21	timerandwakeup	07:45:39	0
2305345	99	66	30,33	cyclictest	0	-21	swapper/0	09:20:36	0
2305345	99	66	30,32	cyclictest	0	-21	swapper/0	09:40:28	0
2305345	99	66	29,33	cyclictest	0	-21	swapper/0	10:00:17	0
2305345	99	66	28,34	cyclictest	0	-21	swapper/0	10:45:26	0
2305345	99	66	28,34	cyclictest	0	-21	swapper/0	09:45:40	0
2305345	99	66	24,39	cyclictest	0	-21	swapper/0	09:35:27	0
2305345	99	66	23,10	cyclictest	2324456	-21	cut	08:20:35	0
2305345	99	65	30,33	cyclictest	2480615	-21	switchtime	11:50:40	0
2305345	99	65	27,34	cyclictest	2497427	-21	aten_r7power_po	12:10:17	0
2305345	99	65	25,4	cyclictest	256	50	irq/23-42890000.ethernet	09:10:27	0
2305345	99	65	24,36	cyclictest	0	-21	swapper/0	07:20:11	0
2305345	99	64	30,31	cyclictest	0	-21	swapper/0	07:25:39	0
2305345	99	64	30,29	cyclictest	53	-21	kswapd0	12:15:10	0
2305345	99	64	26,35	cyclictest	2330943	-21	switchtime	08:45:40	0
2305345	99	63	28,31	cyclictest	2442232	-21	kworker/u4:8-rpciod	11:10:17	0
2305345	99	62	4,14	cyclictest	2355897	-21	/usr/sbin/munin	09:30:40	0
2305345	99	62	31,27	cyclictest	2441579	-21	kworker/u4:7-rpciod	11:25:30	0
2305345	99	62	29,31	cyclictest	2418871	-21	vmstat	10:40:42	0
2305345	99	62	28,32	cyclictest	2453548	-21	kernelversion	11:20:23	0
2305345	99	62	26,31	cyclictest	0	-21	swapper/0	11:05:27	0
2305345	99	62	26,31	cyclictest	0	-21	swapper/0	11:05:26	0
2305345	99	62	24,4	cyclictest	256	50	irq/23-42890000.ethernet	12:05:33	0
2305345	99	61	33,26	cyclictest	2375104	-21	kworker/u4:5-rpciod	09:55:35	0
2305345	99	61	32,27	cyclictest	2403911	-21	idleruntime-cro	10:24:59	0
2305345	99	61	25,33	cyclictest	0	-21	swapper/0	09:25:17	0
2305346	99	60	46,6	cyclictest	2327275	-21	kworker/u4:9+events_unbound	08:55:02	1
2305345	99	60	28,30	cyclictest	2313092	-21	idleruntime-cro	07:40:00	0
2305345	99	60	25,31	cyclictest	0	-21	swapper/0	11:15:15	0
2305345	99	59	25,4	cyclictest	0	-21	swapper/0	12:00:17	0
2305345	99	59	25,31	cyclictest	0	-21	swapper/0	07:50:14	0
2305345	99	59	23,7	cyclictest	2336085	-21	timerandwakeup	09:05:38	0
2305345	99	59	23,33	cyclictest	2319918	-21	aten_r7power_po	08:05:16	0
2305345	99	59	22,4	cyclictest	0	-21	swapper/0	08:25:32	0
2305345	99	59	21,8	cyclictest	2317865	-21	wc	07:55:35	0
2305346	99	58	52,4	cyclictest	27	1	ktimers/1	12:12:02	1
2305346	99	58	49,6	cyclictest	2305342	-21	cyclictest	12:05:02	1
2305345	99	58	27,4	cyclictest	2499481	-21	kworker/u4:5+rpciod	12:35:40	0
2305345	99	58	24,5	cyclictest	0	-21	swapper/0	08:50:16	0
2305346	99	57	50,6	cyclictest	2477646	-21	kworker/u4:3+events_unbound	12:31:45	1
2305346	99	56	48,6	cyclictest	2393291	-21	kworker/u4:16+events_unbound	10:15:03	1
2305345	99	56	19,6	cyclictest	0	-21	swapper/0	07:30:36	0
2305345	99	55	23,4	cyclictest	0	-21	swapper/0	11:35:25	0
2305345	99	55	19,6	cyclictest	0	-21	swapper/0	08:15:40	0
2305346	99	54	49,4	cyclictest	2428720	-21	kworker/u4:10+events_unbound	11:15:02	1
2305346	99	54	46,4	cyclictest	0	-21	swapper/1	11:55:16	1
2305346	99	54	41,5	cyclictest	2310503	-21	kworker/u4:16+events_unbound	08:17:01	1
2305346	99	54	40,7	cyclictest	0	-21	swapper/1	09:50:29	1
2305346	99	54	40,7	cyclictest	0	-21	swapper/1	09:50:28	1
2305345	99	54	23,5	cyclictest	0	-21	swapper/0	07:40:38	0
2305346	99	53	44,7	cyclictest	2443626	-21	sd-accept	11:09:47	1
2305346	99	53	44,7	cyclictest	2443626	-21	sd-accept	11:09:47	1
2305346	99	52	45,5	cyclictest	2394989	-21	idleruntime-cro	10:15:00	1
2305346	99	52	43,5	cyclictest	27	1	ktimers/1	11:26:59	1
2305345	99	52	17,7	cyclictest	2333471	-21	switchtime	08:55:38	0
2305346	99	51	43,6	cyclictest	2314349	-21	systemd	07:44:14	1
2305346	99	50	41,6	cyclictest	2501690	-21	ssh	12:15:12	1
2305346	99	49	41,6	cyclictest	0	-21	swapper/1	08:30:37	1
2305346	99	49	40,5	cyclictest	0	-21	swapper/1	09:45:28	1
2305346	99	49	34,5	cyclictest	17	1	rcu_preempt	09:15:19	1
2305346	99	48	41,6	cyclictest	2327275	-21	kworker/u4:9+events_unbound	09:32:34	1
2305346	99	48	41,5	cyclictest	2337137	-21	gltestperf	09:10:20	1
2305346	99	48	41,5	cyclictest	2305273	-21	kworker/u4:0+events_unbound	07:17:01	1
2305346	99	48	39,7	cyclictest	2493211	-21	fschecks_count	12:05:21	1
2305346	99	48	39,7	cyclictest	2480770	-21	unixbench-2d	11:50:40	1
2305346	99	48	3,35	cyclictest	2475135	-21	ssh	11:45:14	1
2305345	99	48	41,5	cyclictest	2305852	-21	gltestperf	07:10:25	0
2305346	99	47	41,4	cyclictest	2350566	-21	cpu	09:25:17	1
2305346	99	47	40,5	cyclictest	2327790	-21	fschecks_time	08:35:18	1
2305346	99	47	36,7	cyclictest	0	-21	swapper/1	10:50:35	1
2305346	99	46	36,7	cyclictest	2435716	-21	gltestperf	11:00:22	1
2305346	99	45	39,5	cyclictest	2301627	-21	kworker/u4:3+events_unbound	07:30:02	1
2305346	99	45	38,5	cyclictest	2417512	-21	apt-get	10:40:12	1
2305346	99	45	38,5	cyclictest	2331198	-21	kworker/u4:14+events_unbound	08:50:03	1
2305346	99	45	37,5	cyclictest	2413320	-21	/usr/sbin/munin	10:35:17	1
2305346	99	45	35,8	cyclictest	2430902	-21	aten_r7power_en	10:55:17	1
2305346	99	45	30,6	cyclictest	2301627	-21	kworker/u4:3+events_unbound	07:14:15	1
2305346	99	44	38,4	cyclictest	2318357	-21	sed	08:00:01	1
2305346	99	44	37,5	cyclictest	2510936	-21	tune2fs	12:25:19	1
2305346	99	44	37,5	cyclictest	2404357	-21	aten_r7power_po	10:25:18	1
2305345	99	44	35,7	cyclictest	2307621	-21	timerandwakeup	07:15:39	0
2305346	99	43	37,4	cyclictest	2364822	-21	ntpq	09:40:38	1
2305346	99	43	36,5	cyclictest	2444234	-21	cut	11:10:16	1
2305346	99	43	36,5	cyclictest	2359431	-21	aten_r7power_cu	09:35:16	1
2305346	99	43	36,5	cyclictest	2345849	-21	aten_r7power_cu	09:20:16	1
2305346	99	43	29,6	cyclictest	2459617	-21	kworker/u4:6+events_unbound	11:31:00	1
2305345	99	43	34,7	cyclictest	2328807	-21	aten_r7power_cu	08:40:14	0
2305346	99	42	36,4	cyclictest	2412781	-21	idleruntime-cro	10:35:01	1
2305346	99	42	34,5	cyclictest	2450570	-21	kworker/u4:11-rpciod	11:20:21	1
2305346	99	42	32,7	cyclictest	2305274	-21	kworker/u4:2-rpciod	07:45:24	1
2305346	99	41	30,8	cyclictest	0	-21	swapper/1	07:35:20	1
2305346	99	40	32,5	cyclictest	2321430	-21	tune2fs	08:10:19	1
2305345	99	40	34,4	cyclictest	2334276	-21	tune2fs	09:00:21	0
2305346	99	38	31,4	cyclictest	2300424	-21	kworker/u4:1-rpciod	07:10:02	1
2305346	99	38	27,9	cyclictest	0	-21	swapper/1	08:25:37	1
2305346	99	38	17,6	cyclictest	2305342	-21	cyclictest	07:20:26	1
2305345	99	37	31,4	cyclictest	2327800	-21	fschecks_time	08:35:19	0
2305345	99	36	27,6	cyclictest	0	-21	swapper/0	07:10:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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