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 Mon Dec 29, 2025 12:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1173047	99	113	88,17	cyclictest	54	-21	kswapd0	10:35:09	0
1173047	99	104	95,4	cyclictest	54	-21	kswapd0	12:15:06	0
1173047	99	104	95,4	cyclictest	54	-21	kswapd0	12:15:05	0
1173048	99	100	90,8	cyclictest	1223352	-21	kworker/u4:5+events_unbound	10:10:48	1
1173047	99	100	67,19	cyclictest	54	-21	kswapd0	12:30:11	0
1173048	99	95	87,6	cyclictest	1227684	-21	kworker/u4:6+events_unbound	09:40:42	1
1173048	99	93	86,5	cyclictest	1353388	-21	kworker/u4:8+events_unbound	12:11:05	1
1173048	99	92	85,5	cyclictest	1171789	-21	kworker/u4:3+events_unbound	07:45:21	1
1173048	99	85	78,5	cyclictest	1194827	-21	kworker/u4:3+events_unbound	08:50:35	1
1173048	99	84	79,4	cyclictest	1184639	-21	kworker/u4:4+events_unbound	08:35:32	1
1173048	99	82	75,5	cyclictest	1265816	-21	kworker/u4:5+events_unbound	10:25:49	1
1173048	99	81	75,4	cyclictest	1197368	-21	kworker/u4:11+events_unbound	09:16:59	1
1173047	99	73	65,6	cyclictest	1201129	-21	kworker/u4:1+events_unbound	09:05:01	0
1173047	99	72	64,4	cyclictest	1250945	-21	/usr/sbin/munin	10:05:11	0
1173048	99	70	63,5	cyclictest	1194827	-21	kworker/u4:3+events_unbound	09:05:37	1
1173048	99	69	59,7	cyclictest	1342700	-21	apt-get	11:55:12	1
1173048	99	68	56,6	cyclictest	1303371	-21	kworker/u4:6+events_unbound	11:25:04	1
1173047	99	66	57,7	cyclictest	950181	-21	kworker/u4:4+events_unbound	07:10:07	0
1173047	99	65	54,9	cyclictest	54	-21	kswapd0	09:50:10	0
1173048	99	64	57,5	cyclictest	1183290	-21	kworker/u4:12+events_unbound	07:55:03	1
1173048	99	64	56,5	cyclictest	1172980	-21	kworker/u4:10+events_unbound	08:10:27	1
1173048	99	64	47,6	cyclictest	1349181	-21	kworker/u4:0+events_unbound	12:21:14	1
1173047	99	64	53,8	cyclictest	1236406	-21	kworker/u4:1+events_unbound	10:17:01	0
1173048	99	63	56,5	cyclictest	1183289	-21	kworker/u4:5+events_unbound	09:00:15	1
1173048	99	63	46,6	cyclictest	1274364	-21	kworker/u4:3+events_unbound	10:43:58	1
1173048	99	62	45,7	cyclictest	1240735	-21	kworker/u4:7+events_unbound	10:20:09	1
1173047	99	62	53,6	cyclictest	1201133	-21	kworker/u4:6+events_unbound	09:15:40	0
1173048	99	61	54,5	cyclictest	1175514	-21	kworker/u4:14+events_unbound	07:25:12	1
1173048	99	61	13,43	cyclictest	1347716	-21	ssh	12:00:34	1
1173047	99	61	51,7	cyclictest	1359090	-21	latency_hist	12:15:01	0
1173047	99	61	48,9	cyclictest	0	-21	swapper/0	12:08:52	0
1173047	99	61	37,7	cyclictest	54	-21	kswapd0	09:40:34	0
1173048	99	60	53,5	cyclictest	1303368	-21	kworker/u4:1+events_unbound	11:07:44	1
1173048	99	60	52,5	cyclictest	1196086	-21	kworker/u4:7+events_unbound	08:40:03	1
1173048	99	59	49,7	cyclictest	1319673	-21	kworker/u4:9+events_unbound	11:41:00	1
1173047	99	59	48,8	cyclictest	1255750	-21	/usr/sbin/munin	10:10:24	0
1173047	99	59	24,12	cyclictest	1213754	-21	expr	09:20:37	0
1173047	99	59	15,19	cyclictest	1238147	-21	latency_hist	09:50:01	0
1173048	99	58	52,4	cyclictest	1197368	-21	kworker/u4:11+events_unbound	09:30:43	1
1173048	99	58	50,6	cyclictest	1336582	-21	kworker/u4:6+events_unbound	11:50:00	1
1173047	99	58	48,7	cyclictest	1286496	-21	kworker/u4:18+events_unbound	11:05:55	0
1173047	99	57	46,7	cyclictest	0	-21	swapper/0	10:55:15	0
1173048	99	56	47,5	cyclictest	1204761	-21	ssh	09:10:26	1
1173048	99	56	45,6	cyclictest	0	-21	swapper/1	10:00:38	1
1173047	99	56	42,7	cyclictest	247	50	irq/20-imx-lcdifv3-crtc.0	07:35:01	0
1173047	99	56	38,14	cyclictest	54	-21	kswapd0	11:55:11	0
1173048	99	55	48,6	cyclictest	1369702	-21	kworker/u4:17+events_unbound	12:27:44	1
1173048	99	55	48,5	cyclictest	1303370	-21	kworker/u4:5+events_unbound	11:34:59	1
1173047	99	55	38,12	cyclictest	1183323	-21	apt-get	07:50:11	0
1173047	99	54	41,6	cyclictest	0	-21	swapper/0	10:50:30	0
1173047	99	54	40,12	cyclictest	15	1	ktimers/0	11:20:30	0
1173047	99	54	38,11	cyclictest	255	50	irq/23-42890000.ethernet	11:10:12	0
1173047	99	54	37,10	cyclictest	0	-21	swapper/0	12:35:35	0
1173047	99	54	32,20	cyclictest	1175580	-21	sendmail	07:20:01	0
1173047	99	54	20,10	cyclictest	0	-21	swapper/0	09:05:19	0
1173048	99	53	44,7	cyclictest	1173181	-21	systemd	07:10:06	1
1173048	99	53	35,7	cyclictest	1240735	-21	kworker/u4:7+events_unbound	10:06:47	1
1173047	99	53	39,7	cyclictest	0	-21	swapper/0	07:50:00	0
1173047	99	53	39,11	cyclictest	1243147	-21	/usr/sbin/munin	09:55:23	0
1173047	99	53	19,16	cyclictest	0	-21	swapper/0	10:30:36	0
1173048	99	52	46,4	cyclictest	1184639	-21	kworker/u4:4+events_unbound	09:27:43	1
1173048	99	52	45,5	cyclictest	1176896	-21	kworker/u4:6+events_unbound	08:00:03	1
1173048	99	52	39,5	cyclictest	1286496	-21	kworker/u4:18+events_unbound	11:10:06	1
1173047	99	52	6,19	cyclictest	1339265	-21	ntpq	11:50:27	0
1173047	99	52	44,5	cyclictest	1284953	-21	gltestperf	10:45:20	0
1173047	99	52	30,7	cyclictest	1281168	-21	ntp_kernel_pll_	10:40:31	0
1173047	99	52	30,19	cyclictest	1225910	-21	head	09:35:22	0
1173047	99	52	13,27	cyclictest	1217644	-21	ssh	09:25:25	0
1173048	99	51	45,5	cyclictest	1282290	-21	kworker/u4:17+events_unbound	11:17:01	1
1173048	99	51	45,5	cyclictest	1205920	-21	kworker/u4:7+events_unbound	09:23:00	1
1173048	99	51	44,5	cyclictest	1274364	-21	kworker/u4:3+events_unbound	10:45:04	1
1173048	99	51	44,5	cyclictest	1193242	-21	sendmail_mailqu	08:25:39	1
1173048	99	51	44,5	cyclictest	1178156	-21	kworker/u4:11+events_unbound	07:40:04	1
1173048	99	51	43,6	cyclictest	0	-21	swapper/1	08:45:33	1
1173047	99	51	35,10	cyclictest	255	50	irq/23-42890000.ethernet	11:25:31	0
1173047	99	51	29,19	cyclictest	0	-21	swapper/0	10:00:20	0
1173047	99	51	15,13	cyclictest	0	-21	swapper/0	11:35:21	0
1173047	99	51	10,13	cyclictest	1299382	-21	ssh	11:02:28	0
1173048	99	50	44,4	cyclictest	1236407	-21	kworker/u4:2+events_unbound	10:19:44	1
1173048	99	50	43,4	cyclictest	1376035	-21	hostname	12:35:16	1
1173048	99	50	42,5	cyclictest	1351930	-21	/usr/sbin/munin	12:05:35	1
1173047	99	50	42,6	cyclictest	1221660	-21	gltestperf	09:30:21	0
1173047	99	50	41,6	cyclictest	1199505	-21	sshd	08:50:33	0
1173047	99	50	40,7	cyclictest	1192136	-21	tail	08:20:36	0
1173047	99	50	36,7	cyclictest	255	50	irq/23-42890000.ethernet	11:45:26	0
1173047	99	50	31,14	cyclictest	0	-21	swapper/0	07:20:11	0
1173047	99	50	24,22	cyclictest	255	50	irq/23-42890000.ethernet	09:10:27	0
1173047	99	50	24,22	cyclictest	247	50	irq/20-imx-lcdifv3-crtc.0	10:25:00	0
1173047	99	50	24,21	cyclictest	0	-21	swapper/0	08:34:59	0
1173047	99	50	19,8	cyclictest	0	-21	swapper/0	11:15:22	0
1173048	99	49	43,4	cyclictest	1360580	-21	unixbench_singl	12:15:44	1
1173048	99	49	43,4	cyclictest	1360580	-21	unixbench_singl	12:15:43	1
1173048	99	49	43,4	cyclictest	1243513	-21	mailstats	09:55:37	1
1173048	99	49	42,5	cyclictest	1371811	-21	dpkg	12:30:12	1
1173048	99	49	39,7	cyclictest	0	-21	swapper/1	09:50:17	1
1173048	99	49	39,7	cyclictest	0	-21	swapper/1	07:20:00	1
1173048	99	49	38,8	cyclictest	0	-21	swapper/1	11:00:36	1
1173047	99	49	8,16	cyclictest	1196961	-21	ntpq	08:40:36	0
1173047	99	49	39,6	cyclictest	54	-21	kswapd0	11:35:01	0
1173048	99	48	42,5	cyclictest	1303371	-21	kworker/u4:6+events_unbound	11:39:59	1
1173048	99	48	33,12	cyclictest	1234556	-21	if_eth0	09:45:21	1
1173047	99	48	21,7	cyclictest	255	50	irq/23-42890000.ethernet	12:20:31	0
1173047	99	48	17,8	cyclictest	0	-21	swapper/0	08:05:31	0
1173048	99	47	40,5	cyclictest	1225708	-21	df_abs	09:35:17	1
1173048	99	47	39,5	cyclictest	1190952	-21	kworker/u4:9+events_unbound	08:20:03	1
1173048	99	47	28,6	cyclictest	1265816	-21	kworker/u4:5+events_unbound	10:31:45	1
1173047	99	47	5,20	cyclictest	1371559	-21	apt-key	12:30:00	0
1173047	99	47	39,5	cyclictest	1198653	-21	idleruntime-cro	08:49:59	0
1173047	99	47	38,6	cyclictest	1195634	-21	sendmail-mta	08:35:30	0
1173047	99	47	37,8	cyclictest	1180918	-21	aten_r7power_cu	07:40:17	0
1173047	99	47	11,16	cyclictest	15	1	ktimers/0	10:25:17	0
1173047	99	47	11,12	cyclictest	0	-21	swapper/0	12:00:33	0
1173048	99	46	38,5	cyclictest	1292935	-21	aten_r7power_cu	10:55:17	1
1173048	99	46	29,6	cyclictest	1307564	-21	kworker/u4:8+events_unbound	11:22:35	1
1173047	99	46	40,3	cyclictest	255	50	irq/23-42890000.ethernet	08:25:07	0
1173047	99	46	38,5	cyclictest	1330667	-21	fschecks_count	11:40:22	0
1173047	99	46	37,7	cyclictest	1190271	-21	gltestperf	08:15:21	0
1173047	99	46	15,4	cyclictest	1200068	-21	apt-get	08:55:14	0
1173048	99	45	38,5	cyclictest	1190192	-21	fschecks_time	08:15:21	1
1173048	99	45	38,5	cyclictest	1189682	-21	kworker/u4:0+events_unbound	08:55:02	1
1173048	99	45	36,7	cyclictest	1179991	-21	gltestperf	07:35:19	1
1173048	99	45	36,6	cyclictest	0	-21	swapper/1	11:50:31	1
1173048	99	45	35,7	cyclictest	0	-21	swapper/1	10:50:23	1
1173047	99	45	6,15	cyclictest	1185374	-21	ntpq	07:55:26	0
1173047	99	45	41,3	cyclictest	1164660	-21	kworker/u4:7+events_unbound	07:10:00	0
1173048	99	44	37,5	cyclictest	1276213	-21	acpi	10:35:13	1
1173048	99	44	37,5	cyclictest	1183293	-21	kworker/u4:15+events_unbound	07:51:03	1
1173048	99	44	28,6	cyclictest	1184639	-21	kworker/u4:4+events_unbound	08:08:29	1
1173047	99	44	35,6	cyclictest	1178191	-21	awk	07:29:59	0
1173048	99	43	35,6	cyclictest	1178356	-21	sshd	07:30:12	1
1173048	99	43	35,6	cyclictest	1173157	-21	latency_hist	07:10:02	1
1173048	99	43	34,6	cyclictest	0	-21	swapper/1	08:30:30	1
1173047	99	43	35,6	cyclictest	1179634	-21	aten_r7power_cu	07:35:15	0
1173047	99	43	30,9	cyclictest	1186800	-21	ps	08:00:32	0
1173047	99	42	5,14	cyclictest	1189127	-21	memory	08:10:24	0
1173048	99	41	34,5	cyclictest	1173046	-21	cyclictest	07:20:33	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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