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 Thu Jan 08, 2026 12:46:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2587664	99	103	90,10	cyclictest	54	-21	kswapd0	11:10:09	0
2587664	99	102	92,6	cyclictest	2591424	-21	kworker/u4:9+events_unbound	07:25:25	0
2587664	99	94	85,7	cyclictest	2636655	-21	kworker/u4:9+events_unbound	09:46:09	0
2587664	99	81	67,10	cyclictest	54	-21	kswapd0	10:15:13	0
2587664	99	79	39,38	cyclictest	2605915	-21	aten_r7power_vo	08:25:16	0
2587664	99	75	67,6	cyclictest	2708893	-21	kworker/u4:6+events_unbound	11:21:24	0
2587664	99	75	43,28	cyclictest	1068	-21	snmpd	09:53:17	0
2587664	99	73	33,6	cyclictest	0	-21	swapper/0	09:40:27	0
2587665	99	72	39,17	cyclictest	0	-21	swapper/1	10:10:29	1
2587664	99	72	29,6	cyclictest	2598981	-21	kworker/u4:21-rpciod	08:10:01	0
2587665	99	71	60,8	cyclictest	2618831	-21	sshd	09:11:04	1
2587664	99	71	26,9	cyclictest	2601530	-21	modprobe	08:05:00	0
2587664	99	69	36,5	cyclictest	2587660	-21	cyclictest	09:00:01	0
2587664	99	69	35,7	cyclictest	2612121	-21	aten_r7power_cu	08:50:14	0
2587664	99	69	35,7	cyclictest	2612121	-21	aten_r7power_cu	08:50:14	0
2587664	99	69	35,6	cyclictest	2604560	-21	aten2__	08:20:14	0
2587664	99	68	39,26	cyclictest	2707600	-21	gltestperf	11:00:16	0
2587664	99	68	33,6	cyclictest	2770332	-21	unixbench-2d	12:15:37	0
2587664	99	64	24,32	cyclictest	0	-21	swapper/0	12:00:29	0
2587664	99	63	55,6	cyclictest	2729954	-21	kworker/u4:8+events_unbound	11:56:29	0
2587664	99	60	53,5	cyclictest	2685387	-21	kworker/u4:11+events_unbound	10:31:43	0
2587664	99	60	52,6	cyclictest	2588870	-21	kworker/u4:0+events_unbound	07:20:25	0
2587664	99	60	51,7	cyclictest	2702148	-21	kworker/u4:3+events_unbound	10:53:01	0
2587664	99	60	2,44	cyclictest	2774091	-21	ssh	12:20:29	0
2587665	99	59	50,7	cyclictest	2753138	-21	fschecks_time	11:55:18	1
2587664	99	59	50,6	cyclictest	2590132	-21	kworker/u4:8+events_unbound	08:15:51	0
2587664	99	58	50,6	cyclictest	2708893	-21	kworker/u4:6+events_unbound	11:20:00	0
2587664	99	58	48,7	cyclictest	388	-21	dbus-daemon	09:11:05	0
2587664	99	58	48,7	cyclictest	0	-21	swapper/0	10:20:16	0
2587664	99	58	47,8	cyclictest	388	-21	dbus-daemon	07:10:22	0
2587664	99	56	3,42	cyclictest	2601735	-21	apt-get	08:10:08	0
2587664	99	55	44,7	cyclictest	2744975	-21	gltestperf	11:45:19	0
2587664	99	54	47,5	cyclictest	2608092	-21	sshd	08:30:53	0
2587665	99	53	45,6	cyclictest	2685391	-21	sd-mkdcreds	10:31:42	1
2587665	99	53	44,7	cyclictest	2588875	-21	kworker/u4:2+events_unbound	07:15:24	1
2587665	99	53	23,18	cyclictest	2587660	-21	cyclictest	11:21:38	1
2587665	99	53	20,20	cyclictest	0	-21	swapper/1	12:30:17	1
2587664	99	53	39,11	cyclictest	2715152	-21	ssh	11:10:01	0
2587664	99	53	38,7	cyclictest	0	-21	swapper/0	11:50:13	0
2587664	99	52	12,34	cyclictest	2635011	-21	ntpq	09:30:27	0
2587665	99	51	44,5	cyclictest	2696523	-21	ntp_kernel_err	10:45:20	1
2587665	99	51	34,12	cyclictest	26	1	rcuc/1	12:15:14	1
2587665	99	51	2,36	cyclictest	2688229	-21	memory	10:35:23	1
2587664	99	51	44,5	cyclictest	2781280	-21	idleruntime-cro	12:30:00	0
2587665	99	50	44,4	cyclictest	2664192	-21	systemd	10:06:11	1
2587665	99	50	43,5	cyclictest	2715987	-21	gltestperf	11:10:25	1
2587665	99	50	42,6	cyclictest	2761838	-21	ntp_states	12:05:33	1
2587665	99	50	41,6	cyclictest	0	-21	swapper/1	12:23:59	1
2587664	99	50	43,5	cyclictest	2782011	-21	gltestperf	12:30:20	0
2587664	99	50	43,5	cyclictest	2729077	-21	unixbench_multi	11:25:37	0
2587664	99	50	43,5	cyclictest	2688218	-21	/usr/sbin/munin	10:35:21	0
2587664	99	50	43,5	cyclictest	2604301	-21	kworker/u4:6+events_unbound	08:40:01	0
2587664	99	50	41,6	cyclictest	2658976	-21	/usr/sbin/munin	10:00:17	0
2587664	99	50	34,14	cyclictest	0	-21	swapper/0	11:36:25	0
2587665	99	49	40,6	cyclictest	2593934	-21	kworker/u4:13-rpciod	07:45:00	1
2587665	99	49	25,15	cyclictest	0	-21	swapper/1	11:30:22	1
2587664	99	49	42,5	cyclictest	2616938	-21	kworker/u4:7+events_unbound	09:16:05	0
2587664	99	49	42,5	cyclictest	2598747	-21	xargs	07:50:34	0
2587664	99	49	40,7	cyclictest	2626947	-21	timerwakeupswit	09:20:38	0
2587664	99	49	39,7	cyclictest	2667231	-21	grep	10:10:20	0
2587664	99	49	28,18	cyclictest	2600236	-21	kworker/u4:22-rpciod	09:00:16	0
2587665	99	48	41,5	cyclictest	2728475	-21	kernelversion	11:25:21	1
2587665	99	48	40,5	cyclictest	0	-21	swapper/1	07:30:24	1
2587665	99	48	34,11	cyclictest	0	-21	swapper/1	12:40:01	1
2587664	99	48	41,5	cyclictest	2666600	-21	latency_hist	10:10:01	0
2587664	99	48	39,7	cyclictest	54	-21	kswapd0	12:35:34	0
2587664	99	48	39,6	cyclictest	0	-21	swapper/0	11:40:32	0
2587664	99	48	39,6	cyclictest	0	-21	swapper/0	11:40:32	0
2587665	99	47	40,5	cyclictest	2616161	-21	fschecks_count	09:05:17	1
2587665	99	47	39,6	cyclictest	2671221	-21	aten_r7power_po	10:15:27	1
2587664	99	47	38,7	cyclictest	2609689	-21	aten_r7power_vo	08:40:16	0
2587665	99	46	9,13	cyclictest	2647011	-21	ssh	09:45:16	1
2587665	99	46	40,4	cyclictest	2639420	-21	processes	09:35:36	1
2587665	99	46	39,5	cyclictest	2608485	-21	df_abs	08:35:15	1
2587665	99	46	37,7	cyclictest	2713002	-21	systemd	11:06:20	1
2587665	99	46	37,7	cyclictest	2693043	-21	unixbench_singl	10:40:39	1
2587665	99	46	37,6	cyclictest	2706948	-21	idleruntime-cro	11:00:00	1
2587664	99	46	39,5	cyclictest	2692775	-21	mailstats	10:40:35	0
2587664	99	46	39,5	cyclictest	2638599	-21	basename	09:35:15	0
2587665	99	45	39,4	cyclictest	2607281	-21	fschecks_count	08:30:20	1
2587665	99	45	38,5	cyclictest	2740772	-21	fschecks_time	11:40:20	1
2587665	99	45	38,5	cyclictest	2740772	-21	fschecks_time	11:40:20	1
2587665	99	45	38,5	cyclictest	2651633	-21	uname	09:50:21	1
2587665	99	45	38,5	cyclictest	2594155	-21	aten2__	07:35:13	1
2587665	99	45	37,6	cyclictest	2634885	-21	kernelversion	09:30:21	1
2587665	99	45	36,6	cyclictest	54	-21	kswapd0	12:05:00	1
2587665	99	45	35,7	cyclictest	0	-21	swapper/1	12:25:26	1
2587665	99	45	34,9	cyclictest	2719916	-21	fschecks_count	11:15:17	1
2587664	99	45	7,32	cyclictest	2732067	-21	sh	11:30:13	0
2587664	99	45	38,5	cyclictest	2761943	-21	sendmail_mailqu	12:05:35	0
2587664	99	45	38,5	cyclictest	2697124	-21	grep	10:45:35	0
2587664	99	45	36,7	cyclictest	2754589	-21	kworker/u4:14-rpciod	12:10:16	0
2587665	99	44	39,4	cyclictest	54	-21	kswapd0	11:40:00	1
2587665	99	44	38,4	cyclictest	2748956	-21	fschecks_count	11:50:18	1
2587665	99	44	38,4	cyclictest	2707162	-21	acpi	11:00:07	1
2587665	99	44	37,5	cyclictest	2658844	-21	gltestperf	10:00:15	1
2587665	99	44	37,5	cyclictest	2612326	-21	fschecks_count	08:50:18	1
2587665	99	44	37,5	cyclictest	2612326	-21	fschecks_count	08:50:17	1
2587665	99	44	35,6	cyclictest	2601938	-21	latency_hist	08:10:01	1
2587665	99	44	32,9	cyclictest	0	-21	swapper/1	09:00:20	1
2587665	99	44	32,8	cyclictest	0	-21	swapper/1	12:10:11	1
2587665	99	44	13,23	cyclictest	2630710	-21	ssh	09:25:23	1
2587664	99	44	37,5	cyclictest	2630599	-21	cat	09:25:20	0
2587664	99	44	37,5	cyclictest	2587721	-21	latency_hist	07:10:00	0
2587664	99	44	36,6	cyclictest	0	-21	swapper/0	07:56:53	0
2587664	99	44	33,9	cyclictest	2596492	-21	cron	07:44:59	0
2587665	99	43	33,7	cyclictest	0	-21	swapper/1	09:20:02	1
2587665	99	43	13,7	cyclictest	27	1	ktimers/1	09:15:28	1
2587664	99	43	36,5	cyclictest	2679406	-21	aten2__	10:25:15	0
2587664	99	43	36,5	cyclictest	2679406	-21	aten2__	10:25:15	0
2587664	99	43	36,5	cyclictest	2616112	-21	fschecks_count	09:05:17	0
2587664	99	43	35,6	cyclictest	2589793	-21	processes	07:15:36	0
2587664	99	43	34,6	cyclictest	2597738	-21	cron	07:50:00	0
2587665	99	42	35,4	cyclictest	2592622	-21	unixbench_singl	07:25:37	1
2587665	99	42	34,6	cyclictest	2679920	-21	kernelversion	10:25:22	1
2587665	99	42	34,6	cyclictest	2679920	-21	kernelversion	10:25:21	1
2587665	99	42	33,7	cyclictest	2602047	-21	aten_r7power_en	08:10:23	1
2587665	99	42	33,5	cyclictest	0	-21	swapper/1	10:50:37	1
2587665	99	42	31,8	cyclictest	0	-21	swapper/1	10:20:15	1
2587664	99	42	33,5	cyclictest	2586404	-21	kworker/u4:5-rpciod	07:35:20	0
2587664	99	42	29,9	cyclictest	0	-21	swapper/0	08:50:00	0
2587665	99	41	4,24	cyclictest	2745238	-21	ntpq	11:45:28	1
2587665	99	41	35,5	cyclictest	2587660	-21	cyclictest	08:45:59	1
2587665	99	41	33,6	cyclictest	2642734	-21	aten2__	09:40:16	1
2587665	99	41	30,8	cyclictest	0	-21	swapper/1	08:25:32	1
2587665	99	40	5,12	cyclictest	2601067	-21	ntpq	08:00:31	1
2587665	99	40	33,5	cyclictest	2613769	-21	gltestperf	08:55:20	1
2587665	99	40	33,5	cyclictest	2591092	-21	sendmail_mailqu	07:20:35	1
2587665	99	40	25,12	cyclictest	0	-21	swapper/1	08:40:16	1
2587665	99	39	33,4	cyclictest	2604889	-21	gltestperf	08:20:18	1
2587665	99	39	32,5	cyclictest	2597627	-21	unixbench_multi	07:45:36	1
2587665	99	39	32,5	cyclictest	2588908	-21	munin-plugin-st	07:15:00	1
2587665	99	39	30,7	cyclictest	0	-21	swapper/1	07:55:36	1
2587665	99	39	30,6	cyclictest	2598819	-21	timerwakeupswit	07:50:35	1
2587664	99	39	31,5	cyclictest	2636655	-21	kworker/u4:9-rpciod	10:00:00	0
2587665	99	38	28,7	cyclictest	27	1	ktimers/1	09:55:49	1
2587665	99	38	28,7	cyclictest	0	-21	swapper/1	08:15:30	1
2587664	99	38	3,28	cyclictest	2706925	-21	modprobe	11:00:01	0
2587664	99	38	30,6	cyclictest	2592944	-21	aten_r7power_en	07:30:17	0
2587665	99	32	24,6	cyclictest	2587696	-21	latency_hist	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