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 highest latencies:

System rack7slot2.osadl.org (updated Tue Jul 14, 2026 12:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
649767	99	108	99,7	cyclictest	762759	-21	kworker/u4:6+events_unbound	11:04:05	0
649767	99	101	93,5	cyclictest	850898	-21	kworker/u4:10+events_unbound	12:29:27	0
649767	99	97	90,5	cyclictest	762762	-21	kworker/u4:10+events_unbound	10:54:02	0
649768	99	95	86,7	cyclictest	806058	-21	kworker/u4:1+events_unbound	11:44:18	1
649767	99	93	84,7	cyclictest	675463	-21	kworker/u4:0+events_unbound	09:13:45	0
649767	99	91	75,4	cyclictest	718781	-21	kworker/u4:9+events_unbound	09:53:52	0
649768	99	90	83,5	cyclictest	762757	-21	kworker/u4:0+events_unbound	10:49:01	1
649767	99	89	81,6	cyclictest	859240	-21	kworker/u4:2+events_unbound	12:34:28	0
649768	99	88	76,5	cyclictest	736012	-21	kworker/u4:4+events_unbound	10:13:57	1
649767	99	88	73,6	cyclictest	692435	-21	kworker/u4:0+events_unbound	09:23:47	0
649768	99	87	78,6	cyclictest	776091	-21	kworker/u4:7+events_unbound	11:14:05	1
649767	99	87	78,6	cyclictest	775451	-21	kworker/u4:4+events_unbound	11:34:12	0
649768	99	84	66,6	cyclictest	723245	-21	kworker/u4:11+events_unbound	09:58:52	1
649767	99	84	76,6	cyclictest	859243	-21	kworker/u4:6+events_unbound	12:39:27	0
649768	99	83	73,7	cyclictest	740441	-21	kworker/u4:11+events_unbound	10:23:57	1
649767	99	79	71,6	cyclictest	753821	-21	kworker/u4:3+events_unbound	10:44:00	0
649767	99	76	68,6	cyclictest	740441	-21	kworker/u4:11+events_unbound	10:23:59	0
649767	99	76	67,7	cyclictest	762759	-21	kworker/u4:6+events_unbound	10:59:04	0
649768	99	74	66,5	cyclictest	832847	-21	kworker/u4:12+events_unbound	12:14:26	1
649767	99	73	39,16	cyclictest	53	-21	kswapd0	12:00:13	0
649768	99	72	50,5	cyclictest	811173	-21	kworker/u4:6+events_unbound	11:39:18	1
649767	99	72	64,5	cyclictest	669082	-21	kworker/u4:14+events_unbound	09:18:46	0
649767	99	71	61,7	cyclictest	709866	-21	kworker/u4:2+events_unbound	10:18:58	0
649768	99	70	63,5	cyclictest	714359	-21	kworker/u4:7+events_unbound	09:48:52	1
649767	99	68	58,7	cyclictest	378	-21	dbus-daemon	07:13:33	0
649767	99	65	57,6	cyclictest	823877	-21	kworker/u4:0+events_unbound	11:54:24	0
649767	99	65	57,6	cyclictest	823877	-21	kworker/u4:0+events_unbound	11:54:24	0
649768	99	64	43,6	cyclictest	762759	-21	kworker/u4:6+events_unbound	10:50:43	1
649767	99	63	56,5	cyclictest	718780	-21	kworker/u4:6+events_unbound	10:08:55	0
649767	99	63	56,5	cyclictest	665235	-21	kworker/u4:12+events_unbound	08:18:41	0
649768	99	62	47,7	cyclictest	651025	-21	apt-get	07:15:15	1
649767	99	62	55,5	cyclictest	753823	-21	kworker/u4:7+events_unbound	10:34:00	0
649768	99	61	53,6	cyclictest	779856	-21	kworker/u4:9+events_unbound	11:09:06	1
649768	99	61	43,9	cyclictest	0	-21	swapper/1	12:20:33	1
649767	99	61	53,6	cyclictest	749394	-21	kworker/u4:1+events_unbound	10:28:59	0
649767	99	61	53,6	cyclictest	749394	-21	kworker/u4:1+events_unbound	10:28:59	0
649767	99	60	50,7	cyclictest	811174	-21	kworker/u4:8+events_unbound	11:40:01	0
649768	99	59	53,4	cyclictest	837354	-21	kworker/u4:2+events_unbound	12:09:25	1
649767	99	59	54,3	cyclictest	675465	-21	kworker/u4:2+events_unbound	08:48:43	0
649767	99	59	49,8	cyclictest	53	-21	kswapd0	10:50:00	0
649767	99	59	49,7	cyclictest	687889	-21	kworker/u4:12+events_unbound	09:43:53	0
649767	99	59	49,7	cyclictest	687889	-21	kworker/u4:12+events_unbound	09:43:53	0
649767	99	59	43,6	cyclictest	656198	-21	kworker/u4:14+events_unbound	07:38:36	0
649768	99	58	52,4	cyclictest	806058	-21	kworker/u4:1+events_unbound	11:49:25	1
649768	99	58	49,7	cyclictest	837355	-21	kworker/u4:4+events_unbound	12:25:14	1
649768	99	57	49,6	cyclictest	656198	-21	kworker/u4:14+events_unbound	07:38:38	1
649768	99	56	48,6	cyclictest	53	-21	kswapd0	10:45:00	1
649767	99	56	49,5	cyclictest	784328	-21	kworker/u4:13+events_unbound	11:10:02	0
649767	99	55	48,5	cyclictest	705333	-21	kworker/u4:13+events_unbound	09:38:52	0
649767	99	55	46,7	cyclictest	378	-21	dbus-daemon	11:44:18	0
649767	99	55	37,15	cyclictest	797804	-21	kworker/u4:17-rpciod	11:22:17	0
649768	99	54	38,7	cyclictest	846374	-21	kworker/u4:9+events_unbound	12:17:45	1
649767	99	54	47,5	cyclictest	775450	-21	kworker/u4:3+events_unbound	11:55:13	0
649768	99	53	44,7	cyclictest	400	-21	systemd-logind	09:23:47	1
649768	99	53	43,8	cyclictest	378	-21	dbus-daemon	10:59:02	1
649767	99	53	46,5	cyclictest	658851	-21	kworker/u4:1+events_unbound	08:25:02	0
649767	99	53	45,6	cyclictest	678500	-21	fschecks_count	09:00:19	0
649767	99	53	31,19	cyclictest	844855	-21	grep	12:15:43	0
649768	99	52	45,5	cyclictest	776091	-21	kworker/u4:7+events_unbound	11:00:23	1
649767	99	52	44,6	cyclictest	677176	-21	fschecks_count	08:55:20	0
649768	99	51	44,5	cyclictest	652358	-21	kworker/u4:8+events_unbound	09:10:01	1
649768	99	51	43,6	cyclictest	708979	-21	unixbench_multi	09:40:42	1
649768	99	51	43,6	cyclictest	708979	-21	unixbench_multi	09:40:42	1
649768	99	51	42,7	cyclictest	808389	-21	latency_hist	11:35:01	1
649768	99	51	41,7	cyclictest	673335	-21	df_abs	08:40:17	1
649768	99	51	40,9	cyclictest	667791	-21	systemd	08:18:40	1
649767	99	51	42,6	cyclictest	841877	-21	kworker/u4:6+rpciod	12:20:41	0
649767	99	51	32,7	cyclictest	815625	-21	kworker/u4:13+events_unbound	11:45:01	0
649768	99	50	43,5	cyclictest	861728	-21	aten_r7power_po	12:35:16	1
649768	99	50	43,5	cyclictest	703229	-21	http	09:35:17	1
649768	99	50	40,8	cyclictest	659339	-21	fschecks_count	07:45:20	1
649768	99	50	40,8	cyclictest	659339	-21	fschecks_count	07:45:20	1
649767	99	50	44,4	cyclictest	641201	-21	kworker/u4:10+events_unbound	07:48:37	0
649767	99	50	44,4	cyclictest	641201	-21	kworker/u4:10+events_unbound	07:48:37	0
649767	99	50	43,5	cyclictest	738257	-21	latency_hist	10:15:02	0
649767	99	50	33,15	cyclictest	756083	-21	aten_r7power_vo	10:35:16	0
649768	99	49	43,4	cyclictest	803962	-21	munin-run	11:30:00	1
649768	99	49	43,4	cyclictest	803962	-21	munin-run	11:30:00	1
649768	99	49	42,5	cyclictest	738651	-21	sed	10:15:18	1
649768	99	49	42,5	cyclictest	694522	-21	aten_r7power_vo	09:25:19	1
649768	99	49	42,5	cyclictest	686427	-21	mailstats	09:15:39	1
649768	99	49	41,5	cyclictest	654171	-21	fschecks_time	07:25:21	1
649767	99	49	38,9	cyclictest	801123	-21	unixbench_multi	11:25:42	0
649767	99	49	38,9	cyclictest	801123	-21	unixbench_multi	11:25:42	0
649767	99	49	37,10	cyclictest	795169	-21	sendmail	11:20:00	0
649768	99	48	41,5	cyclictest	726103	-21	ld	10:00:33	1
649768	99	48	40,5	cyclictest	660589	-21	cut	07:50:21	1
649768	99	48	39,7	cyclictest	664242	-21	aten_r7power_en	08:05:16	1
649768	99	48	38,7	cyclictest	0	-21	swapper/1	12:00:36	1
649768	99	48	35,6	cyclictest	811172	-21	kworker/u4:5+events_unbound	11:52:37	1
649768	99	48	35,6	cyclictest	811172	-21	kworker/u4:5+events_unbound	11:52:36	1
649767	99	48	40,6	cyclictest	835665	-21	/usr/sbin/munin	12:05:26	0
649768	99	47	40,5	cyclictest	826775	-21	/usr/sbin/munin	11:55:27	1
649768	99	47	40,5	cyclictest	698855	-21	aten_r7power_po	09:30:16	1
649768	99	47	40,5	cyclictest	675464	-21	kworker/u4:1+events_unbound	09:00:01	1
649768	99	47	37,8	cyclictest	656069	-21	unixbench-2d	07:30:37	1
649768	99	47	37,8	cyclictest	0	-21	swapper/1	12:30:38	1
649767	99	47	40,5	cyclictest	716204	-21	munin-run	09:50:00	0
649767	99	47	40,5	cyclictest	699643	-21	ld	09:30:36	0
649767	99	47	40,5	cyclictest	680672	-21	latency_hist	09:10:01	0
649767	99	47	39,6	cyclictest	656198	-21	kworker/u4:14+events_unbound	07:33:36	0
649767	99	47	35,9	cyclictest	0	-21	swapper/0	12:10:17	0
649768	99	46	39,5	cyclictest	752420	-21	ld	10:30:34	1
649768	99	46	37,7	cyclictest	653661	-21	systemd	07:23:34	1
649768	99	46	37,6	cyclictest	676011	-21	fschecks_time	08:50:20	1
649768	99	46	37,6	cyclictest	676011	-21	fschecks_time	08:50:20	1
649768	99	46	36,7	cyclictest	0	-21	swapper/1	11:20:17	1
649767	99	46	38,5	cyclictest	720948	-21	/usr/sbin/munin	09:55:17	0
649768	99	45	38,4	cyclictest	678971	-21	sendmail_mailqu	09:00:37	1
649768	99	45	37,6	cyclictest	672940	-21	sendmail	08:40:00	1
649768	99	45	37,6	cyclictest	0	-21	swapper/1	11:15:36	1
649768	99	45	36,6	cyclictest	717822	-21	unixbench_singl	09:50:44	1
649767	99	45	38,5	cyclictest	641201	-21	kworker/u4:10+events_unbound	08:33:41	0
649768	99	44	37,5	cyclictest	756198	-21	sh	10:35:16	1
649768	99	44	36,6	cyclictest	670636	-21	aten_r7power_en	08:30:16	1
649768	99	44	36,6	cyclictest	668997	-21	unixbench_multi	08:20:38	1
649768	99	44	34,7	cyclictest	0	-21	swapper/1	10:05:25	1
649767	99	44	38,4	cyclictest	0	-21	swapper/0	08:38:41	0
649767	99	44	36,5	cyclictest	670251	-21	unixbench_multi	08:25:41	0
649768	99	43	35,6	cyclictest	662290	-21	proc_pri	07:55:34	1
649768	99	43	35,6	cyclictest	657845	-21	aten_r7power_en	07:40:22	1
649768	99	43	33,8	cyclictest	748397	-21	unixbench-2d	10:25:40	1
649768	99	43	33,8	cyclictest	748397	-21	unixbench-2d	10:25:40	1
649768	99	43	33,7	cyclictest	0	-21	swapper/1	07:10:36	1
649768	99	43	31,10	cyclictest	681596	-21	ssh	09:10:24	1
649767	99	43	37,4	cyclictest	654171	-21	fschecks_time	07:25:20	0
649767	99	43	36,5	cyclictest	652724	-21	aten_r7power_vo	07:20:18	0
649767	99	43	35,6	cyclictest	779856	-21	kworker/u4:9+events_unbound	11:05:03	0
649767	99	43	34,5	cyclictest	658872	-21	kworker/u4:5	07:45:01	0
649767	99	43	33,8	cyclictest	694311	-21	acpi	09:25:13	0
649767	99	43	33,7	cyclictest	652358	-21	kworker/u4:8-rpciod	08:50:20	0
649767	99	43	33,7	cyclictest	652358	-21	kworker/u4:8-rpciod	08:50:20	0
649767	99	43	33,7	cyclictest	641201	-21	kworker/u4:10-xprtiod	07:15:28	0
649768	99	42	35,5	cyclictest	664007	-21	awk	08:05:01	1
649767	99	42	34,6	cyclictest	1069	-21	lldpd	07:56:09	0
649767	99	41	35,4	cyclictest	673418	-21	fschecks_time	08:40:18	0
649767	99	41	34,4	cyclictest	725736	-21	gltestperf	10:00:20	0
649767	99	41	33,5	cyclictest	660121	-21	kworker/u4:3-rpciod	08:00:20	0
649768	99	40	32,5	cyclictest	665462	-21	aten2__	08:10:15	1
649768	99	40	31,7	cyclictest	675544	-21	latency_hist	08:50:06	1
649767	99	40	33,5	cyclictest	656197	-21	kworker/u4:7+events_unbound	07:53:39	0
649767	99	38	31,5	cyclictest	665488	-21	aten_r7power_cu	08:10:15	0
649767	99	38	28,7	cyclictest	664457	-21	fschecks_time	08:05:20	0
649768	99	37	29,6	cyclictest	669365	-21	aten_r7power_en	08:25:17	1
649767	99	37	29,6	cyclictest	256	50	irq/23-42890000.ethernet	07:10:01	0
649768	99	35	28,4	cyclictest	0	-21	swapper/1	07:10:02	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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