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 Sun Apr 19, 2026 00:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3471808	99	97	88,7	cyclictest	3514298	-21	kworker/u4:1+events_unbound	21:27:59	0
3471808	99	97	88,7	cyclictest	3514298	-21	kworker/u4:1+events_unbound	21:27:58	0
3471808	99	95	87,6	cyclictest	3518805	-21	kworker/u4:5+events_unbound	21:33:00	0
3471808	99	95	77,8	cyclictest	3667758	-21	kworker/u4:8+events_unbound	00:28:41	0
3471808	99	94	87,5	cyclictest	3584959	-21	kworker/u4:4+events_unbound	22:48:20	0
3471808	99	93	75,6	cyclictest	3486017	-21	kworker/u4:10+events_unbound	20:47:52	0
3471808	99	89	82,5	cyclictest	3558815	-21	kworker/u4:9+events_unbound	22:23:12	0
3471809	99	86	45,8	cyclictest	3542883	-21	ssh	21:55:00	1
3471809	99	86	45,8	cyclictest	3542883	-21	ssh	21:55:00	1
3471808	99	86	78,6	cyclictest	3598323	-21	kworker/u4:11+events_unbound	23:18:25	0
3471808	99	84	76,6	cyclictest	3598323	-21	kworker/u4:11+events_unbound	23:03:22	0
3471808	99	84	74,8	cyclictest	3473033	-21	kworker/u4:10+events_unbound	19:12:36	0
3471809	99	83	75,6	cyclictest	3509715	-21	kworker/u4:9+events_unbound	21:38:01	1
3471808	99	83	74,7	cyclictest	3584959	-21	kworker/u4:4+events_unbound	23:13:23	0
3471809	99	82	74,6	cyclictest	3475617	-21	kworker/u4:12+events_unbound	19:52:40	1
3471808	99	78	70,6	cyclictest	3667758	-21	kworker/u4:8+events_unbound	00:33:43	0
3471808	99	76	69,5	cyclictest	3493676	-21	kworker/u4:13+events_unbound	21:43:01	0
3471808	99	76	66,7	cyclictest	3473033	-21	kworker/u4:10+events_unbound	19:42:38	0
3471808	99	74	59,4	cyclictest	3672203	-21	kworker/u4:13+events_unbound	00:23:43	0
3471809	99	70	61,6	cyclictest	3486022	-21	kworker/u4:17+events_unbound	21:07:56	1
3471808	99	70	63,5	cyclictest	3563278	-21	kworker/u4:12+events_unbound	22:18:11	0
3471809	99	69	64,3	cyclictest	3584959	-21	kworker/u4:4+events_unbound	23:08:25	1
3471809	99	69	60,7	cyclictest	3486017	-21	kworker/u4:10+events_unbound	20:32:45	1
3471808	99	69	61,6	cyclictest	3584962	-21	kworker/u4:10+events_unbound	22:43:19	0
3471808	99	69	55,10	cyclictest	53	-21	kswapd0	00:00:00	0
3471808	99	68	60,6	cyclictest	3474319	-21	kworker/u4:8+events_unbound	19:25:02	0
3471808	99	68	58,7	cyclictest	3654579	-21	kworker/u4:13+events_unbound	00:08:40	0
3471808	99	67	54,11	cyclictest	53	-21	kswapd0	21:55:08	0
3471808	99	66	57,7	cyclictest	3493679	-21	kworker/u4:19+events_unbound	20:57:54	0
3471808	99	65	57,6	cyclictest	3527898	-21	kworker/u4:2+events_unbound	21:48:02	0
3471808	99	65	56,6	cyclictest	3637588	-21	kworker/u4:9+events_unbound	23:53:37	0
3471808	99	65	56,6	cyclictest	3484711	-21	kworker/u4:4+events_unbound	19:57:40	0
3471809	99	63	55,6	cyclictest	3476974	-21	kworker/u4:15+events_unbound	19:35:00	1
3471809	99	63	54,6	cyclictest	0	-21	swapper/1	22:45:15	1
3471808	99	63	54,7	cyclictest	3484708	-21	kworker/u4:1+events_unbound	20:27:47	0
3471809	99	62	54,6	cyclictest	3484710	-21	kworker/u4:3+events_unbound	20:07:44	1
3471808	99	62	52,7	cyclictest	3493676	-21	kworker/u4:13+events_unbound	21:53:04	0
3471808	99	62	52,7	cyclictest	3493676	-21	kworker/u4:13+events_unbound	21:53:03	0
3471808	99	61	52,7	cyclictest	3580493	-21	kworker/u4:9+events_unbound	22:38:19	0
3471809	99	60	53,5	cyclictest	3652661	-21	/usr/sbin/munin	00:00:16	1
3471809	99	60	52,6	cyclictest	3486019	-21	kworker/u4:14+events_unbound	20:22:45	1
3471808	99	59	51,5	cyclictest	3486022	-21	kworker/u4:17+events_unbound	20:35:01	0
3471808	99	58	40,7	cyclictest	3474316	-21	kworker/u4:3+events_unbound	19:50:08	0
3471809	99	57	50,5	cyclictest	3492408	-21	systemd	20:27:45	1
3471809	99	57	45,10	cyclictest	3661581	-21	fschecks_count	00:10:19	1
3471808	99	57	40,14	cyclictest	3475654	-21	apt-get	19:25:08	0
3471809	99	56	47,6	cyclictest	3473033	-21	kworker/u4:10+events_unbound	19:27:37	1
3471809	99	55	48,5	cyclictest	3625276	-21	sshd	23:28:27	1
3471809	99	55	46,7	cyclictest	378	-21	dbus-daemon	22:58:20	1
3471809	99	55	43,6	cyclictest	0	-21	swapper/1	21:10:18	1
3471808	99	55	47,6	cyclictest	3619872	-21	kworker/u4:15+events_unbound	23:36:00	0
3471808	99	55	46,6	cyclictest	3525482	-21	/usr/sbin/munin	21:35:17	0
3471808	99	55	33,20	cyclictest	3489083	-21	fschecks_time	20:15:19	0
3471809	99	54	46,6	cyclictest	3554335	-21	kworker/u4:1+events_unbound	22:08:11	1
3471809	99	54	46,6	cyclictest	3474319	-21	kworker/u4:8+events_unbound	19:17:34	1
3471808	99	54	46,6	cyclictest	3589410	-21	kworker/u4:5+events_unbound	22:52:01	0
3471808	99	54	46,6	cyclictest	3486020	-21	kworker/u4:15+events_unbound	20:12:45	0
3471808	99	54	45,6	cyclictest	3484711	-21	kworker/u4:4+events_unbound	20:02:43	0
3471808	99	54	44,6	cyclictest	3681050	-21	kworker/u4:10-events_power_efficient	00:36:39	0
3471809	99	53	45,5	cyclictest	0	-21	swapper/1	23:40:28	1
3471808	99	53	45,6	cyclictest	3493679	-21	kworker/u4:19+events_unbound	20:37:49	0
3471808	99	53	42,8	cyclictest	3640108	-21	/usr/sbin/munin	23:45:20	0
3471808	99	53	39,11	cyclictest	53	-21	kswapd0	00:15:10	0
3471809	99	52	43,5	cyclictest	3530754	-21	/usr/sbin/munin	21:40:36	1
3471809	99	52	42,8	cyclictest	3604447	-21	latency_hist	23:05:01	1
3471808	99	52	44,6	cyclictest	3508083	-21	/usr/sbin/munin	21:15:22	0
3471808	99	52	43,6	cyclictest	3653617	-21	cat	00:00:40	0
3471809	99	51	44,5	cyclictest	3556492	-21	aten_r7power_en	22:10:14	1
3471808	99	51	44,5	cyclictest	3513227	-21	unixbench_singl	21:20:40	0
3471808	99	51	43,4	cyclictest	256	50	irq/23-42890000.ethernet	23:30:12	0
3471808	99	51	42,6	cyclictest	3622679	-21	gltestperf	23:25:21	0
3471808	99	51	42,6	cyclictest	3503538	-21	kernelversion	21:10:22	0
3471808	99	51	41,7	cyclictest	3556138	-21	latency_hist	22:10:00	0
3471809	99	50	43,5	cyclictest	3641987	-21	kworker/u4:3+events_unbound	23:48:35	1
3471809	99	50	43,5	cyclictest	0	-21	swapper/1	00:25:14	1
3471809	99	50	42,6	cyclictest	3548723	-21	/usr/sbin/munin	22:00:39	1
3471808	99	50	4,43	cyclictest	0	-21	swapper/0	19:35:35	0
3471808	99	50	43,5	cyclictest	3562631	-21	kworker/u4:10+events_unbound	22:30:01	0
3471808	99	50	38,8	cyclictest	0	-21	swapper/0	22:55:34	0
3471809	99	49	43,4	cyclictest	3617454	-21	munin-run	23:20:01	1
3471809	99	49	42,5	cyclictest	594	-21	sendmail-mta	21:22:55	1
3471809	99	49	41,6	cyclictest	3667758	-21	kworker/u4:8+events_unbound	00:20:41	1
3471809	99	49	41,6	cyclictest	3494844	-21	tail	20:35:42	1
3471808	99	49	39,8	cyclictest	3638319	-21	systemd	23:43:29	0
3471808	99	49	32,14	cyclictest	3556644	-21	grep	22:10:16	0
3471809	99	48	41,5	cyclictest	3565786	-21	kernelversion	22:20:22	1
3471809	99	48	41,5	cyclictest	3547407	-21	grep	22:00:05	1
3471809	99	48	39,6	cyclictest	3650775	-21	kworker/u4:12+events_unbound	23:58:38	1
3471809	99	48	38,8	cyclictest	378	-21	dbus-daemon	21:27:57	1
3471809	99	48	38,8	cyclictest	378	-21	dbus-daemon	21:27:57	1
3471809	99	48	37,8	cyclictest	3684028	-21	switchtime	00:35:37	1
3471808	99	48	37,7	cyclictest	256	50	irq/23-42890000.ethernet	22:30:24	0
3471809	99	47	41,4	cyclictest	3678957	-21	fschecks_count	00:30:20	1
3471809	99	47	40,5	cyclictest	3575291	-21	who	22:30:39	1
3471809	99	47	39,6	cyclictest	3627039	-21	/usr/sbin/munin	23:30:24	1
3471809	99	47	39,6	cyclictest	3562631	-21	kworker/u4:10+events_unbound	22:28:15	1
3471809	99	47	39,6	cyclictest	3475619	-21	systemd	19:22:36	1
3471809	99	47	18,15	cyclictest	0	-21	swapper/1	00:15:20	1
3471808	99	47	38,6	cyclictest	3618501	-21	ld	23:20:29	0
3471808	99	47	38,5	cyclictest	3501382	-21	cron	21:05:00	0
3471808	99	47	34,8	cyclictest	0	-21	swapper/0	23:05:13	0
3471808	99	47	30,15	cyclictest	3474369	-21	sendmail	19:20:01	0
3471809	99	46	39,5	cyclictest	3654579	-21	kworker/u4:13+events_unbound	00:06:59	1
3471809	99	46	39,5	cyclictest	3522134	-21	sed	21:30:39	1
3471809	99	46	39,4	cyclictest	3607182	-21	kworker/u4:8-rpciod	23:10:40	1
3471809	99	46	38,6	cyclictest	3641988	-21	kworker/u4:5+rpciod	23:50:39	1
3471809	99	46	38,5	cyclictest	3611607	-21	kworker/u4:7-rpciod	23:20:26	1
3471808	99	46	38,5	cyclictest	3471807	-21	cyclictest	00:10:10	0
3471808	99	46	36,7	cyclictest	3547756	-21	aten_r7power_po	22:00:17	0
3471809	99	45	38,5	cyclictest	3472371	-21	gltestperf	19:10:20	1
3471809	99	45	36,7	cyclictest	3632213	-21	unixbench_singl	23:35:40	1
3471809	99	45	36,5	cyclictest	0	-21	swapper/1	20:55:27	1
3471808	99	45	37,6	cyclictest	3487332	-21	munin-plugin-st	20:10:00	0
3471808	99	45	36,7	cyclictest	3477312	-21	aten_r7power_vo	19:30:17	0
3471808	99	45	34,7	cyclictest	3501896	-21	fschecks_time	21:05:21	0
3471809	99	44	38,4	cyclictest	3595673	-21	sed	22:55:02	1
3471809	99	44	38,4	cyclictest	3483879	-21	fschecks_count	19:55:18	1
3471809	99	44	37,5	cyclictest	3535276	-21	sh	21:45:37	1
3471809	99	44	37,5	cyclictest	3496857	-21	gltestperf	20:45:20	1
3471809	99	44	33,7	cyclictest	0	-21	swapper/1	22:35:30	1
3471808	99	44	33,8	cyclictest	0	-21	swapper/0	19:50:01	0
3471809	99	43	36,5	cyclictest	3487814	-21	fschecks_time	20:10:18	1
3471809	99	43	36,5	cyclictest	3478453	-21	aten2__	19:35:15	1
3471808	99	43	36,5	cyclictest	3498326	-21	ntpq	20:50:30	0
3471808	99	43	31,8	cyclictest	0	-21	swapper/0	20:20:24	0
3471809	99	42	34,6	cyclictest	3493676	-21	kworker/u4:13+events_unbound	21:17:57	1
3471809	99	42	33,6	cyclictest	0	-21	swapper/1	20:40:16	1
3471809	99	42	30,7	cyclictest	0	-21	swapper/1	22:15:28	1
3471809	99	41	32,6	cyclictest	3476974	-21	kworker/u4:15+rpciod	19:40:38	1
3471809	99	41	31,8	cyclictest	3583304	-21	if_eth0	22:40:18	1
3471808	99	41	33,5	cyclictest	3495443	-21	fschecks_count	20:40:17	0
3471809	99	40	32,5	cyclictest	3497906	-21	sed	20:50:17	1
3471809	99	39	30,6	cyclictest	0	-21	swapper/1	19:45:19	1
3471809	99	38	32,4	cyclictest	3471807	-21	cyclictest	20:01:58	1
3471809	99	37	28,7	cyclictest	3471868	-21	latency_hist	19:10:01	1
3471809	99	37	17,6	cyclictest	3486016	-21	kworker/u4:9+events_unbound	20:20:01	1
3471809	99	36	29,4	cyclictest	0	-21	swapper/1	21:00:32	1
3471808	99	35	26,6	cyclictest	3471732	-21	kworker/u4:0+rpciod	19:10:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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