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 100 highest latencies:

System rack7slot2.osadl.org (updated Sat Jan 24, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2972050	99	108	99,7	cyclictest	3113720	-21	kworker/u4:1+events_unbound	23:27:39	1
2972050	99	103	95,6	cyclictest	3174894	-21	kworker/u4:14+events_unbound	00:27:46	1
2972050	99	85	75,6	cyclictest	0	-21	swapper/1	21:20:23	1
2972050	99	81	74,5	cyclictest	2988412	-21	kworker/u4:14+events_unbound	20:17:07	1
2972050	99	79	71,6	cyclictest	3087873	-21	kworker/u4:13+events_unbound	22:47:29	1
2972049	99	74	64,7	cyclictest	3122515	-21	kworker/u4:8+events_unbound	23:58:17	0
2972049	99	74	41,30	cyclictest	3030142	-21	timerandwakeup	21:40:37	0
2972049	99	73	65,5	cyclictest	3001140	-21	kworker/u4:16+events_unbound	21:17:16	0
2972049	99	73	65,5	cyclictest	3001140	-21	kworker/u4:16+events_unbound	21:17:16	0
2972049	99	73	36,4	cyclictest	3098619	-21	aten_r7power_en	23:00:15	0
2972049	99	72	32,6	cyclictest	2973536	-21	aten_r7power_en	19:15:15	0
2972050	99	71	62,7	cyclictest	3096712	-21	kworker/u4:7+events_unbound	23:07:34	1
2972049	99	71	39,4	cyclictest	3143166	-21	grep	23:50:46	0
2972049	99	70	32,6	cyclictest	0	-21	swapper/0	20:45:36	0
2972049	99	70	31,9	cyclictest	3051672	-21	mailstats	22:05:38	0
2972049	99	69	36,5	cyclictest	3055563	-21	if_eth0	22:10:21	0
2972049	99	69	34,5	cyclictest	3160101	-21	ssh	00:10:32	0
2972049	99	69	33,6	cyclictest	2993807	-21	aten_r7power_vo	20:35:15	0
2972049	99	68	34,10	cyclictest	255	50	irq/23-42890000.ethernet	00:30:08	0
2972050	99	67	55,6	cyclictest	3168793	-21	sh	00:20:29	1
2972049	99	67	58,6	cyclictest	2970794	-21	kworker/u4:0+events_unbound	19:32:01	0
2972050	99	65	58,5	cyclictest	2971986	-21	kworker/u4:3+events_unbound	19:42:03	1
2972050	99	64	56,5	cyclictest	2971986	-21	kworker/u4:3+events_unbound	20:15:02	1
2972049	99	64	55,7	cyclictest	3070154	-21	kworker/u4:4+events_unbound	22:27:25	0
2972049	99	63	51,8	cyclictest	37	-21	kcompactd0	22:02:13	0
2972050	99	62	41,15	cyclictest	54	-21	kswapd0	23:20:11	1
2972050	99	60	36,18	cyclictest	0	-21	swapper/1	21:45:13	1
2972049	99	60	51,7	cyclictest	3022675	-21	systemd	21:32:18	0
2972049	99	60	44,5	cyclictest	3109301	-21	kworker/u4:0+events_unbound	23:22:38	0
2972050	99	59	45,9	cyclictest	0	-21	swapper/1	22:35:30	1
2972049	99	59	51,6	cyclictest	2977067	-21	kworker/u4:13+events_unbound	19:52:04	0
2972049	99	59	48,8	cyclictest	0	-21	swapper/0	21:55:35	0
2972050	99	58	47,7	cyclictest	3134288	-21	/usr/sbin/munin	23:40:36	1
2972049	99	58	40,15	cyclictest	54	-21	kswapd0	23:30:14	0
2972050	99	57	46,9	cyclictest	314	-21	systemd-journal	22:02:21	1
2972050	99	57	40,12	cyclictest	54	-21	kswapd0	22:15:15	1
2972049	99	57	48,7	cyclictest	3114067	-21	systemd	23:17:35	0
2972050	99	56	49,5	cyclictest	3001140	-21	kworker/u4:16+events_unbound	21:10:00	1
2972050	99	56	49,5	cyclictest	3001140	-21	kworker/u4:16+events_unbound	21:10:00	1
2972050	99	56	45,8	cyclictest	3094556	-21	/usr/sbin/munin	22:55:20	1
2972050	99	56	45,8	cyclictest	3094556	-21	/usr/sbin/munin	22:55:19	1
2972049	99	56	49,5	cyclictest	2999788	-21	unixbench_multi	20:55:37	0
2972049	99	56	48,6	cyclictest	0	-21	swapper/0	22:15:36	0
2972049	99	55	49,4	cyclictest	0	-21	swapper/0	22:35:32	0
2972049	99	55	47,5	cyclictest	3038179	-21	gltestperf	21:50:26	0
2972050	99	53	46,5	cyclictest	3109301	-21	kworker/u4:0+events_unbound	23:15:02	1
2972050	99	53	44,5	cyclictest	0	-21	swapper/1	23:50:18	1
2972050	99	53	37,10	cyclictest	0	-21	swapper/1	23:30:17	1
2972049	99	53	45,6	cyclictest	3070152	-21	kworker/u4:2+events_unbound	22:32:26	0
2972049	99	53	44,6	cyclictest	3150527	-21	munin-node	00:00:11	0
2972050	99	52	45,5	cyclictest	2982102	-21	kworker/u4:0+events_unbound	21:40:03	1
2972050	99	52	43,6	cyclictest	3129797	-21	/usr/sbin/munin	23:35:34	1
2972050	99	52	43,6	cyclictest	3025608	-21	sendmail_mailqu	21:35:35	1
2972049	99	52	42,8	cyclictest	3005078	-21	systemd	21:12:15	0
2972050	99	51	44,5	cyclictest	3158987	-21	munin-run	00:10:00	1
2972050	99	51	44,5	cyclictest	2973263	-21	kworker/u4:2+events_unbound	19:40:00	1
2972050	99	51	43,6	cyclictest	3081136	-21	sh	22:40:14	1
2972050	99	51	40,7	cyclictest	0	-21	swapper/1	00:00:13	1
2972049	99	51	43,6	cyclictest	534	-21	in:imuxsock	23:27:37	0
2972049	99	51	42,7	cyclictest	3087873	-21	kworker/u4:13+events_unbound	22:57:32	0
2972049	99	51	42,7	cyclictest	3087873	-21	kworker/u4:13+events_unbound	22:57:31	0
2972049	99	51	42,6	cyclictest	3089514	-21	cron	22:50:00	0
2972049	99	51	35,14	cyclictest	3012683	-21	wc	21:20:37	0
2972050	99	50	43,5	cyclictest	3174894	-21	kworker/u4:14+events_unbound	00:30:14	1
2972050	99	50	43,5	cyclictest	3096713	-21	kworker/u4:9+events_unbound	23:02:00	1
2972050	99	50	41,6	cyclictest	3181421	-21	fschecks_time	00:35:19	1
2972049	99	50	43,5	cyclictest	3111224	-21	cron	23:14:59	0
2972049	99	50	41,7	cyclictest	346	-21	systemd-udevd	23:43:42	0
2972049	99	50	41,6	cyclictest	2996013	-21	kworker/u4:11+events_unbound	20:42:13	0
2972049	99	50	41,6	cyclictest	0	-21	swapper/0	00:10:01	0
2972049	99	50	34,14	cyclictest	3017330	-21	grep	21:25:46	0
2972049	99	50	30,18	cyclictest	2987618	-21	fschecks_count	20:10:18	0
2972050	99	49	38,8	cyclictest	2975811	-21	kworker/u4:11-rpciod	19:25:00	1
2972050	99	49	37,8	cyclictest	2993353	-21	sed	20:30:35	1
2972049	99	49	39,7	cyclictest	2981105	-21	aten_r7power_cu	19:45:16	0
2972049	99	49	39,7	cyclictest	2981105	-21	aten_r7power_cu	19:45:15	0
2972050	99	48	41,5	cyclictest	3051466	-21	ldconfig	22:05:31	1
2972050	99	48	40,6	cyclictest	2994730	-21	systemd	20:37:11	1
2972050	99	48	38,7	cyclictest	3055658	-21	netstat	22:10:24	1
2972050	99	48	38,5	cyclictest	2982102	-21	kworker/u4:0+events_unbound	20:25:00	1
2972050	99	48	38,5	cyclictest	2982102	-21	kworker/u4:0+events_unbound	20:25:00	1
2972050	99	48	36,9	cyclictest	3068140	-21	aten_r7power_cu	22:25:17	1
2972050	99	48	10,28	cyclictest	3003583	-21	ssh	21:10:33	1
2972049	99	48	42,4	cyclictest	3103923	-21	timerandwakeup	23:05:36	0
2972049	99	48	40,5	cyclictest	2988982	-21	gltestperf	20:15:17	0
2972049	99	48	33,11	cyclictest	0	-21	swapper/0	23:37:46	0
2972049	99	48	26,20	cyclictest	0	-21	swapper/0	00:20:00	0
2972049	99	48	26,20	cyclictest	0	-21	swapper/0	00:20:00	0
2972050	99	47	41,4	cyclictest	3163652	-21	aten2__	00:15:15	1
2972050	99	47	41,4	cyclictest	3163652	-21	aten2__	00:15:14	1
2972050	99	47	41,4	cyclictest	3090854	-21	switchtime	22:50:36	1
2972050	99	47	41,4	cyclictest	3035490	-21	kworker/u4:3+events_unbound	21:50:02	1
2972050	99	47	40,5	cyclictest	3057542	-21	kworker/u4:2+events_unbound	22:20:03	1
2972050	99	47	39,6	cyclictest	3020727	-21	sh	21:30:20	1
2972050	99	47	32,6	cyclictest	2969573	-21	kworker/u4:1+events_unbound	19:11:57	1
2972050	99	47	32,6	cyclictest	2969573	-21	kworker/u4:1+events_unbound	19:11:57	1
2972049	99	47	40,5	cyclictest	3168354	-21	fschecks_count	00:20:18	0
2972049	99	47	40,5	cyclictest	3166006	-21	kworker/u4:10+events_unbound	00:25:59	0
2972049	99	47	40,5	cyclictest	2972048	-21	cyclictest	21:35:32	0
2972049	99	47	39,5	cyclictest	3081455	-21	fschecks_count	22:40:18	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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