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 Thu Apr 30, 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
2191327	99	89	82,5	cyclictest	2347329	-21	kworker/u4:1+events_unbound	11:41:04	1
2191327	99	88	77,9	cyclictest	2192552	-21	kworker/u4:11+events_unbound	08:35:21	1
2191327	99	88	63,9	cyclictest	2268389	-21	kworker/u4:1+events_unbound	10:05:41	1
2191327	99	87	70,6	cyclictest	2224480	-21	kworker/u4:1+events_unbound	09:20:36	1
2191327	99	82	74,5	cyclictest	2255086	-21	kworker/u4:12+events_unbound	10:40:46	1
2191326	99	78	68,7	cyclictest	2356269	-21	kworker/u4:2+events_unbound	12:01:07	0
2191327	99	76	68,5	cyclictest	2320642	-21	kworker/u4:3+events_unbound	11:15:55	1
2191327	99	75	66,6	cyclictest	2242464	-21	kworker/u4:0+events_unbound	09:35:37	1
2191327	99	75	66,6	cyclictest	2242464	-21	kworker/u4:0+events_unbound	09:35:36	1
2191326	99	75	29,43	cyclictest	0	-21	swapper/0	10:00:01	0
2191326	99	74	3,22	cyclictest	2397628	-21	ssh	12:30:10	0
2191327	99	73	64,7	cyclictest	2303359	-21	kworker/u4:1+events_unbound	11:05:54	1
2191326	99	73	41,30	cyclictest	2279960	-21	gcc	10:15:30	0
2191326	99	72	36,33	cyclictest	2332337	-21	/usr/sbin/munin	11:15:19	0
2191327	99	71	63,5	cyclictest	2192552	-21	kworker/u4:11+events_unbound	07:35:08	1
2191326	99	70	35,33	cyclictest	2318719	-21	latency_hist	11:00:01	0
2191327	99	69	60,7	cyclictest	2210644	-21	kworker/u4:13+events_unbound	08:55:00	1
2191326	99	69	62,5	cyclictest	2391190	-21	kworker/u4:0+events_unbound	12:26:10	0
2191326	99	69	43,24	cyclictest	2302223	-21	proc_pri	10:40:36	0
2191326	99	69	41,25	cyclictest	2310548	-21	/usr/sbin/munin	10:50:18	0
2191326	99	69	37,29	cyclictest	2275227	-21	df_abs	10:10:19	0
2191326	99	69	34,25	cyclictest	0	-21	swapper/0	11:20:32	0
2191326	99	68	59,7	cyclictest	2208066	-21	kworker/u4:10+events_unbound	08:55:32	0
2191326	99	68	36,29	cyclictest	2245486	-21	/usr/sbin/munin	09:35:40	0
2191326	99	68	36,29	cyclictest	2245486	-21	/usr/sbin/munin	09:35:40	0
2191326	99	68	32,32	cyclictest	2192827	-21	aten_r7power_en	07:15:16	0
2191326	99	68	3,22	cyclictest	2344896	-21	modprobe	11:30:00	0
2191326	99	68	27,38	cyclictest	2236983	-21	unixbench_multi	09:25:40	0
2191326	99	67	30,34	cyclictest	0	-21	swapper/0	11:45:30	0
2191326	99	67	30,33	cyclictest	0	-21	swapper/0	12:35:30	0
2191326	99	67	27,37	cyclictest	0	-21	swapper/0	09:20:46	0
2191326	99	66	28,35	cyclictest	0	-21	swapper/0	09:50:24	0
2191326	99	66	27,37	cyclictest	2284343	-21	ssh	10:20:24	0
2191327	99	65	55,7	cyclictest	2215164	-21	/usr/sbin/munin	08:40:20	1
2191326	99	65	31,30	cyclictest	0	-21	swapper/0	07:25:20	0
2191326	99	65	30,32	cyclictest	2367534	-21	gltestperf	11:55:20	0
2191326	99	65	29,34	cyclictest	2191970	-21	kernelversion	07:10:18	0
2191326	99	65	23,39	cyclictest	0	-21	swapper/0	11:05:16	0
2191326	99	64	56,5	cyclictest	2366935	-21	latency_hist	11:55:02	0
2191326	99	64	34,28	cyclictest	2249592	-21	gcc	09:40:32	0
2191326	99	64	28,32	cyclictest	0	-21	swapper/0	12:20:22	0
2191326	99	64	27,34	cyclictest	0	-21	swapper/0	10:36:47	0
2191326	99	64	24,6	cyclictest	2379928	-21	sh	12:10:01	0
2191326	99	63	34,27	cyclictest	2331791	-21	latency_hist	11:15:01	0
2191326	99	63	29,31	cyclictest	2380952	-21	ssh	12:10:29	0
2191326	99	63	28,33	cyclictest	2241087	-21	ntp_states	09:30:46	0
2191326	99	63	28,31	cyclictest	0	-21	swapper/0	09:00:15	0
2191326	99	63	27,33	cyclictest	0	-21	swapper/0	10:05:54	0
2191326	99	63	26,34	cyclictest	2197444	-21	find	07:30:38	0
2191327	99	62	54,5	cyclictest	2192550	-21	kworker/u4:8+events_unbound	08:25:19	1
2191327	99	62	53,7	cyclictest	2347334	-21	kworker/u4:6+events_unbound	11:35:14	1
2191326	99	62	4,22	cyclictest	2357326	-21	ssh	11:43:49	0
2191326	99	62	29,29	cyclictest	0	-21	swapper/0	09:05:19	0
2191326	99	62	23,4	cyclictest	0	-21	swapper/0	08:40:21	0
2191326	99	61	3,4	cyclictest	0	-21	swapper/0	07:40:12	0
2191326	99	61	33,26	cyclictest	2208060	-21	kworker/u4:2-rpciod	09:10:22	0
2191326	99	61	26,32	cyclictest	0	-21	swapper/0	10:30:35	0
2191326	99	61	25,4	cyclictest	0	-21	swapper/0	09:15:24	0
2191326	99	61	22,3	cyclictest	0	-21	swapper/0	10:25:39	0
2191327	99	60	52,5	cyclictest	2192544	-21	kworker/u4:5+events_unbound	07:45:00	1
2191327	99	60	50,7	cyclictest	2240160	-21	apt-get	09:30:13	1
2191327	99	60	47,10	cyclictest	2307796	-21	kworker/u4:0+events_unbound	10:50:27	1
2191327	99	60	2,50	cyclictest	2385216	-21	rm	12:15:21	1
2191326	99	60	27,31	cyclictest	0	-21	swapper/0	10:00:32	0
2191326	99	60	25,5	cyclictest	0	-21	swapper/0	11:32:49	0
2191326	99	60	21,8	cyclictest	2202907	-21	idleruntime-cro	07:55:00	0
2191327	99	59	45,8	cyclictest	0	-21	swapper/1	11:20:13	1
2191326	99	59	4,13	cyclictest	2306991	-21	users	10:45:41	0
2191326	99	59	29,27	cyclictest	2325712	-21	kworker/u4:12-rpciod	11:35:33	0
2191326	99	59	25,5	cyclictest	0	-21	swapper/0	08:55:00	0
2191326	99	59	25,5	cyclictest	0	-21	swapper/0	08:05:36	0
2191326	99	59	24,5	cyclictest	0	-21	swapper/0	08:35:11	0
2191326	99	59	22,4	cyclictest	0	-21	swapper/0	09:45:15	0
2191327	99	58	46,8	cyclictest	0	-21	swapper/1	10:55:18	1
2191326	99	58	29,26	cyclictest	0	-21	swapper/0	12:15:16	0
2191326	99	58	22,5	cyclictest	0	-21	swapper/0	08:25:16	0
2191326	99	58	21,6	cyclictest	0	-21	swapper/0	08:00:30	0
2191327	99	57	42,12	cyclictest	53	-21	kswapd0	10:15:13	1
2191326	99	57	21,6	cyclictest	0	-21	swapper/0	07:10:00	0
2191327	99	56	48,5	cyclictest	2395577	-21	kworker/u4:6+events_unbound	12:36:13	1
2191327	99	56	43,8	cyclictest	2251287	-21	kworker/u4:4+events_unbound	09:45:00	1
2191327	99	55	46,6	cyclictest	2346304	-21	/usr/sbin/munin	11:30:39	1
2191327	99	55	44,8	cyclictest	2380469	-21	df_abs	12:10:19	1
2191327	99	55	44,8	cyclictest	0	-21	swapper/1	09:50:35	1
2191327	99	55	43,6	cyclictest	0	-21	swapper/1	12:20:42	1
2191327	99	55	39,6	cyclictest	2356269	-21	kworker/u4:2+events_unbound	11:55:00	1
2191326	99	55	22,4	cyclictest	0	-21	swapper/0	07:25:00	0
2191327	99	54	47,5	cyclictest	2312299	-21	kworker/u4:7+events_unbound	11:00:52	1
2191327	99	54	47,5	cyclictest	2205805	-21	aten_r7power_po	08:05:16	1
2191327	99	54	43,7	cyclictest	37	-21	kcompactd0	12:00:02	1
2191327	99	54	43,4	cyclictest	0	-21	swapper/1	12:05:11	1
2191327	99	53	46,5	cyclictest	2211915	-21	kworker/u4:15+events_unbound	09:10:01	1
2191327	99	53	43,7	cyclictest	0	-21	swapper/1	11:50:00	1
2191326	99	53	45,6	cyclictest	2145211	-21	kworker/u4:10+events_unbound	07:50:02	0
2191326	99	53	45,6	cyclictest	2145211	-21	kworker/u4:10+events_unbound	07:50:01	0
2191327	99	52	41,7	cyclictest	2195166	-21	idleruntime-cro	07:25:01	1
2191327	99	51	45,4	cyclictest	2196580	-21	systemd	07:30:04	1
2191327	99	51	43,5	cyclictest	2210643	-21	kworker/u4:12+events_unbound	09:00:01	1
2191327	99	50	42,6	cyclictest	2286107	-21	kworker/u4:1+events_unbound	10:26:41	1
2191327	99	50	42,5	cyclictest	2371787	-21	/usr/sbin/munin	12:00:18	1
2191327	99	50	40,6	cyclictest	2286109	-21	kworker/u4:9-rpciod	10:30:30	1
2191326	99	50	42,6	cyclictest	2216554	-21	sshd	08:45:21	0
2191327	99	49	40,6	cyclictest	2253358	-21	cpu	09:45:17	1
2191327	99	49	30,12	cyclictest	2219930	-21	modprobe	09:05:01	1
2191326	99	49	3,19	cyclictest	2319851	-21	ntpq	11:00:38	0
2191326	99	49	17,9	cyclictest	483	-21	weston-desktop-	08:11:59	0
2191327	99	48	40,5	cyclictest	2208058	-21	kworker/u4:0+events_unbound	08:20:19	1
2191327	99	48	39,7	cyclictest	2208063	-21	kworker/u4:5+events_unbound	08:30:32	1
2191327	99	48	37,6	cyclictest	0	-21	swapper/1	10:35:28	1
2191327	99	48	31,10	cyclictest	0	-21	swapper/1	10:49:59	1
2191327	99	48	25,17	cyclictest	2327901	-21	df_abs	11:10:16	1
2191327	99	47	41,4	cyclictest	2226580	-21	latency_hist	09:15:00	1
2191327	99	47	38,5	cyclictest	2341456	-21	nfs4_client	11:25:24	1
2191326	99	47	40,5	cyclictest	2204177	-21	munin-run	08:00:02	0
2191327	99	46	38,5	cyclictest	2192552	-21	kworker/u4:11+events_unbound	08:10:17	1
2191327	99	45	38,5	cyclictest	2394006	-21	ntpq	12:25:26	1
2191327	99	45	36,5	cyclictest	0	-21	swapper/1	09:55:30	1
2191327	99	45	35,7	cyclictest	0	-21	swapper/1	10:20:23	1
2191326	99	45	38,5	cyclictest	2208527	-21	fschecks_count	08:15:18	0
2191326	99	45	38,5	cyclictest	2198135	-21	fschecks_count	07:35:17	0
2191327	99	44	36,6	cyclictest	2192552	-21	kworker/u4:11+events_unbound	08:00:01	1
2191327	99	44	34,7	cyclictest	0	-21	swapper/1	09:25:30	1
2191327	99	44	32,8	cyclictest	2267498	-21	tail	10:00:42	1
2191327	99	44	11,19	cyclictest	0	-21	swapper/1	08:00:10	1
2191327	99	43	36,4	cyclictest	2398187	-21	uname	12:30:20	1
2191327	99	43	35,6	cyclictest	2201775	-21	systemd	07:50:07	1
2191327	99	43	32,7	cyclictest	0	-21	swapper/1	10:10:37	1
2191326	99	43	35,5	cyclictest	2212218	-21	wget	08:30:15	0
2191326	99	43	32,9	cyclictest	2209995	-21	head	08:20:20	0
2191327	99	42	32,8	cyclictest	2195677	-21	fschecks_time	07:25:20	1
2191327	99	41	33,5	cyclictest	2208527	-21	fschecks_count	08:15:19	1
2191327	99	40	32,6	cyclictest	2227592	-21	ld	09:15:28	1
2191327	99	40	30,7	cyclictest	2201635	-21	basename	07:50:01	1
2191327	99	40	30,7	cyclictest	2201635	-21	basename	07:50:00	1
2191327	99	40	30,6	cyclictest	2217171	-21	cron	08:50:01	1
2191327	99	39	31,5	cyclictest	0	-21	swapper/1	07:20:00	1
2191327	99	39	29,7	cyclictest	0	-21	swapper/1	07:10:18	1
2191327	99	35	25,7	cyclictest	0	-21	swapper/1	07:10:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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