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 Mar 10, 2026 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2417049	99	109	92,7	cyclictest	2586562	-21	kworker/u4:5+events_unbound	00:12:55	1
2417048	99	98	90,6	cyclictest	2428504	-21	kworker/u4:10+events_unbound	19:57:15	0
2417048	99	93	86,5	cyclictest	2586562	-21	kworker/u4:5+events_unbound	00:27:55	0
2417049	99	92	84,6	cyclictest	2423395	-21	kworker/u4:19+events_unbound	20:22:20	1
2417049	99	91	77,6	cyclictest	2464154	-21	kworker/u4:4+events_unbound	21:37:27	1
2417049	99	91	77,6	cyclictest	2464154	-21	kworker/u4:4+events_unbound	21:37:27	1
2417049	99	89	82,5	cyclictest	2427234	-21	kworker/u4:8+events_unbound	19:52:15	1
2417049	99	88	80,6	cyclictest	2438890	-21	kworker/u4:0+events_unbound	20:32:20	1
2417048	99	88	81,5	cyclictest	2406025	-21	kworker/u4:1+events_unbound	19:22:11	0
2417049	99	87	80,5	cyclictest	2431152	-21	kworker/u4:15+events_unbound	20:02:16	1
2417048	99	86	79,5	cyclictest	2418275	-21	kworker/u4:3+events_unbound	19:17:08	0
2417048	99	86	79,5	cyclictest	2414547	-21	kworker/u4:7+events_unbound	19:27:10	0
2417048	99	86	79,5	cyclictest	2414547	-21	kworker/u4:7+events_unbound	19:27:10	0
2417048	99	83	76,5	cyclictest	2422112	-21	kworker/u4:15+events_unbound	19:37:12	0
2417048	99	77	71,4	cyclictest	2440165	-21	kworker/u4:7+events_unbound	20:57:23	0
2417048	99	74	67,5	cyclictest	2438891	-21	kworker/u4:1+events_unbound	20:37:20	0
2417048	99	71	58,9	cyclictest	37	-21	kcompactd0	22:48:55	0
2417049	99	67	61,4	cyclictest	2494827	-21	kworker/u4:13+events_unbound	22:05:19	1
2417048	99	66	59,5	cyclictest	2427233	-21	kworker/u4:7+events_unbound	20:19:44	0
2417048	99	65	34,20	cyclictest	0	-21	swapper/0	23:35:32	0
2417049	99	64	56,5	cyclictest	2427233	-21	kworker/u4:7+events_unbound	20:20:00	1
2417049	99	63	56,5	cyclictest	2569406	-21	kworker/u4:0+events_unbound	23:42:50	1
2417049	99	63	49,5	cyclictest	2436350	-21	kworker/u4:9+events_unbound	20:29:01	1
2417049	99	62	47,6	cyclictest	2529889	-21	kworker/u4:8+events_unbound	22:45:59	1
2417049	99	61	54,5	cyclictest	2613298	-21	kworker/u4:0+events_unbound	00:32:59	1
2417048	99	61	50,8	cyclictest	314	-21	systemd-journal	22:02:32	0
2417049	99	60	52,6	cyclictest	2448397	-21	dpkg	21:10:13	1
2417048	99	58	38,17	cyclictest	2607717	-21	grep	00:10:39	0
2417049	99	57	49,5	cyclictest	2571644	-21	df_abs	23:30:18	1
2417048	99	57	50,5	cyclictest	2538181	-21	kworker/u4:4+events_unbound	22:52:44	0
2417048	99	57	49,6	cyclictest	2594413	-21	/usr/sbin/munin	23:55:39	0
2417048	99	57	49,5	cyclictest	2484623	-21	/usr/sbin/munin	21:50:39	0
2417049	99	55	49,4	cyclictest	2521312	-21	systemd	22:32:39	1
2417049	99	55	48,5	cyclictest	2594237	-21	/usr/sbin/munin	23:55:36	1
2417049	99	55	48,5	cyclictest	2569409	-21	kworker/u4:4+events_unbound	23:40:00	1
2417049	99	55	48,5	cyclictest	2418275	-21	kworker/u4:3+events_unbound	19:13:45	1
2417049	99	55	41,6	cyclictest	2442819	-21	kworker/u4:0+events_unbound	21:02:51	1
2417048	99	55	43,8	cyclictest	2530537	-21	diskmemload	22:43:20	0
2417048	99	55	33,19	cyclictest	2489255	-21	unixbench_singl	21:55:40	0
2417049	99	54	47,5	cyclictest	2610882	-21	aten2__	00:15:15	1
2417049	99	54	47,5	cyclictest	2610882	-21	aten2__	00:15:15	1
2417049	99	54	47,5	cyclictest	2563339	-21	ntp_kernel_err	23:20:25	1
2417049	99	54	42,5	cyclictest	2415778	-21	kworker/u4:8+events_unbound	19:26:12	1
2417049	99	54	42,5	cyclictest	2415778	-21	kworker/u4:8+events_unbound	19:26:11	1
2417048	99	54	48,4	cyclictest	2578294	-21	kworker/u4:2+events_unbound	23:53:00	0
2417048	99	54	46,6	cyclictest	2543290	-21	kworker/u4:13+events_unbound	22:58:51	0
2417048	99	54	46,6	cyclictest	2507538	-21	kworker/u4:16+events_unbound	22:19:00	0
2417049	99	53	46,5	cyclictest	2475810	-21	/usr/sbin/munin	21:40:39	1
2417049	99	53	46,5	cyclictest	2440209	-21	sh	20:40:01	1
2417049	99	53	45,6	cyclictest	2613301	-21	kworker/u4:3+events_unbound	00:22:43	1
2417049	99	53	41,5	cyclictest	2406024	-21	kworker/u4:0+events_unbound	19:16:01	1
2417048	99	53	46,5	cyclictest	2615619	-21	/usr/sbin/munin	00:20:25	0
2417048	99	53	45,6	cyclictest	2449040	-21	/usr/sbin/munin	21:10:28	0
2417049	99	52	45,5	cyclictest	2601805	-21	wc	00:05:01	1
2417049	99	52	45,5	cyclictest	2601805	-21	wc	00:05:00	1
2417049	99	52	45,5	cyclictest	2418276	-21	kworker/u4:4+events_unbound	19:36:03	1
2417049	99	52	45,5	cyclictest	2418275	-21	kworker/u4:3+events_unbound	19:32:11	1
2417049	99	52	39,6	cyclictest	2418276	-21	kworker/u4:4+events_unbound	19:48:00	1
2417048	99	52	45,5	cyclictest	2445361	-21	kworker/u4:1+events_unbound	21:00:45	0
2417048	99	52	44,6	cyclictest	2586561	-21	kworker/u4:1+events_unbound	00:07:56	0
2417048	99	52	44,6	cyclictest	2440165	-21	kworker/u4:7+events_unbound	21:07:49	0
2417048	99	52	44,6	cyclictest	2440165	-21	kworker/u4:7+events_unbound	21:07:48	0
2417048	99	51	44,5	cyclictest	2551620	-21	kworker/u4:6+events_unbound	23:08:00	0
2417048	99	51	44,5	cyclictest	2438894	-21	kworker/u4:5+events_unbound	20:45:03	0
2417048	99	51	43,6	cyclictest	2582865	-21	sd-accept	23:42:50	0
2417048	99	51	43,6	cyclictest	2427233	-21	kworker/u4:7+events_unbound	20:25:02	0
2417048	99	51	37,12	cyclictest	2475721	-21	processes	21:40:37	0
2417048	99	51	32,17	cyclictest	0	-21	swapper/0	20:12:13	0
2417049	99	50	44,4	cyclictest	27	1	ktimers/1	22:21:47	1
2417049	99	50	43,5	cyclictest	2458286	-21	timerandwakeup	21:20:38	1
2417049	99	50	43,5	cyclictest	2441547	-21	kworker/u4:11+events_unbound	20:42:01	1
2417049	99	50	43,5	cyclictest	2438905	-21	kworker/u4:6+events_unbound	20:49:44	1
2417049	99	50	41,6	cyclictest	2527795	-21	/usr/sbin/munin	22:40:18	1
2417049	99	50	41,6	cyclictest	0	-21	swapper/1	23:50:24	1
2417048	99	50	43,5	cyclictest	2459704	-21	kworker/u4:0+events_unbound	21:29:00	0
2417048	99	50	40,7	cyclictest	2472659	-21	ssh	21:37:13	0
2417048	99	50	40,7	cyclictest	2472659	-21	ssh	21:37:12	0
2417049	99	49	42,5	cyclictest	2559161	-21	ldconfig	23:15:40	1
2417049	99	49	42,5	cyclictest	2550762	-21	unixbench-2d	23:05:44	1
2417049	99	49	42,5	cyclictest	0	-21	swapper/1	21:55:25	1
2417049	99	49	41,5	cyclictest	0	-21	swapper/1	22:25:30	1
2417049	99	49	38,9	cyclictest	2546075	-21	processes	23:00:39	1
2417049	99	49	37,9	cyclictest	2448022	-21	systemd	21:07:24	1
2417049	99	49	37,9	cyclictest	2448022	-21	systemd	21:07:23	1
2417049	99	49	37,9	cyclictest	2444481	-21	sed	20:55:17	1
2417049	99	49	37,9	cyclictest	0	-21	swapper/1	00:25:28	1
2417048	99	49	42,5	cyclictest	2425961	-21	kworker/u4:3+events_unbound	19:43:42	0
2417048	99	49	42,5	cyclictest	2422125	-21	kworker/u4:18+events_unbound	20:03:00	0
2417048	99	49	41,6	cyclictest	2624080	-21	aten_r7power_cu	00:30:16	0
2417048	99	49	33,14	cyclictest	2632430	-21	modprobe	00:40:01	0
2417048	99	49	24,21	cyclictest	2558792	-21	tail	23:15:26	0
2417049	99	48	41,5	cyclictest	2502415	-21	unixbench_multi	22:10:43	1
2417049	99	48	41,5	cyclictest	2418264	-21	kworker/u4:2+events_unbound	20:15:00	1
2417049	99	48	38,7	cyclictest	2461703	-21	aten_r7power_po	21:25:17	1
2417049	99	48	37,7	cyclictest	0	-21	swapper/1	00:35:32	1
2417049	99	48	36,5	cyclictest	2438894	-21	kworker/u4:5+events_unbound	20:51:44	1
2417049	99	48	29,11	cyclictest	2418276	-21	kworker/u4:4+events_unbound	20:05:11	1
2417048	99	48	8,26	cyclictest	15	1	ktimers/0	00:15:31	0
2417048	99	48	8,26	cyclictest	15	1	ktimers/0	00:15:30	0
2417048	99	48	41,5	cyclictest	2601921	-21	latency_hist	00:05:01	0
2417048	99	48	41,5	cyclictest	2601921	-21	latency_hist	00:05:01	0
2417048	99	48	41,5	cyclictest	2481398	-21	kworker/u4:4+events_unbound	21:48:06	0
2417048	99	48	39,7	cyclictest	2435398	-21	aten_r7power_vo	20:20:21	0
2417049	99	47	40,5	cyclictest	2503088	-21	kworker/u4:14+events_unbound	22:17:35	1
2417049	99	47	40,5	cyclictest	2423395	-21	kworker/u4:19+events_unbound	19:42:00	1
2417049	99	47	39,6	cyclictest	2418264	-21	kworker/u4:2+events_unbound	19:56:59	1
2417049	99	47	34,11	cyclictest	0	-21	swapper/1	21:45:14	1
2417048	99	47	40,5	cyclictest	2425961	-21	kworker/u4:3+events_unbound	19:45:04	0
2417048	99	47	40,5	cyclictest	2422125	-21	kworker/u4:18+events_unbound	20:06:37	0
2417048	99	47	40,5	cyclictest	2418275	-21	kworker/u4:3+events_unbound	19:13:00	0
2417048	99	47	39,5	cyclictest	2441230	-21	cat	20:40:39	0
2417048	99	47	37,7	cyclictest	2457662	-21	gltestperf	21:20:19	0
2417048	99	47	36,9	cyclictest	2563764	-21	switchtime	23:20:40	0
2417048	99	47	36,8	cyclictest	0	-21	swapper/0	22:30:30	0
2417049	99	46	39,5	cyclictest	2537518	-21	grep	22:50:39	1
2417049	99	46	38,6	cyclictest	2554161	-21	df_abs	23:10:17	1
2417049	99	46	38,6	cyclictest	2420928	-21	latency_hist	19:25:01	1
2417049	99	46	38,5	cyclictest	0	-21	swapper/1	22:35:24	1
2417049	99	46	37,6	cyclictest	0	-21	swapper/1	23:45:29	1
2417048	99	46	40,4	cyclictest	2567479	-21	gltestperf	23:25:22	0
2417048	99	46	39,5	cyclictest	2516693	-21	sshd	22:27:18	0
2417048	99	46	39,4	cyclictest	2501189	-21	/usr/sbin/munin	22:10:17	0
2417048	99	46	38,6	cyclictest	2453565	-21	gcc	21:15:33	0
2417048	99	46	38,6	cyclictest	2418276	-21	kworker/u4:4+events_unbound	19:34:01	0
2417048	99	46	37,7	cyclictest	2564970	-21	kworker/u4:5+events_unbound	23:32:49	0
2417048	99	46	37,7	cyclictest	2467016	-21	switchtime	21:30:39	0
2417048	99	46	37,7	cyclictest	2467016	-21	switchtime	21:30:38	0
2417048	99	46	36,8	cyclictest	2545209	-21	aten_r7power_cu	23:00:16	0
2417049	99	45	39,4	cyclictest	2484075	-21	/usr/sbin/munin	21:50:21	1
2417049	99	45	38,5	cyclictest	2567216	-21	cpu	23:25:18	1
2417049	99	45	38,5	cyclictest	2466885	-21	/usr/sbin/munin	21:30:38	1
2417049	99	45	38,5	cyclictest	2466885	-21	/usr/sbin/munin	21:30:37	1
2417049	99	45	37,5	cyclictest	0	-21	swapper/1	22:00:30	1
2417048	99	45	33,9	cyclictest	54	-21	kswapd0	23:45:06	0
2417048	99	45	33,10	cyclictest	2443761	-21	sendmail_mailqu	20:50:37	0
2417049	99	44	36,5	cyclictest	2603370	-21	diskmemload	00:05:39	1
2417048	99	44	37,5	cyclictest	2428205	-21	cat	19:50:37	0
2417048	99	44	36,6	cyclictest	2438064	-21	fschecks_count	20:30:18	0
2417048	99	44	30,9	cyclictest	37	-21	kcompactd0	22:20:20	0
2417049	99	43	36,5	cyclictest	2541944	-21	unixbench_multi	22:55:39	1
2417048	99	43	36,5	cyclictest	2554282	-21	fschecks_time	23:10:21	0
2417048	99	43	36,5	cyclictest	2527284	-21	cat	22:40:02	0
2417049	99	42	33,7	cyclictest	2453161	-21	fschecks_time	21:15:21	1
2417048	99	42	35,5	cyclictest	2496822	-21	aten_r7power_cu	22:05:16	0
2417049	99	36	28,6	cyclictest	0	-21	swapper/1	19:10:01	1
2417048	99	32	6,18	cyclictest	2417045	-21	cyclictest	19:10:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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