OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

Click here to display the system's profile data or here to proceed to next system.

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 Sun May 17, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4053104	99	98	91,5	cyclictest	4008646	-21	kworker/u4:4+events_unbound	08:24:32	0
4053104	99	98	79,16	cyclictest	53	-21	kswapd0	11:20:07	0
4053104	99	96	87,6	cyclictest	4091089	-21	kworker/u4:9+events_unbound	09:44:46	0
4053104	99	95	89,4	cyclictest	4064578	-21	kworker/u4:7+events_unbound	08:34:32	0
4053105	99	92	77,10	cyclictest	53	-21	kswapd0	11:50:13	1
4053104	99	89	82,5	cyclictest	4065936	-21	kworker/u4:12+events_unbound	08:04:26	0
4053105	99	88	73,6	cyclictest	4065936	-21	kworker/u4:12+events_unbound	08:05:01	1
4053104	99	87	81,4	cyclictest	6117	-21	kworker/u4:3+events_unbound	11:25:10	0
4053105	99	86	78,6	cyclictest	4054327	-21	kworker/u4:12+events_unbound	07:24:20	1
4053104	99	84	73,5	cyclictest	4065930	-21	kworker/u4:8+events_unbound	08:39:36	0
4053104	99	83	75,6	cyclictest	4080188	-21	kworker/u4:9+events_unbound	08:59:40	0
4053104	99	81	74,5	cyclictest	4060726	-21	kworker/u4:5+events_unbound	07:49:23	0
4053104	99	81	74,5	cyclictest	32405	-21	kworker/u4:4+events_unbound	12:15:19	0
4053105	99	79	72,5	cyclictest	4064578	-21	kworker/u4:7+events_unbound	08:17:00	1
4053104	99	79	72,5	cyclictest	4065930	-21	kworker/u4:8+events_unbound	08:19:30	0
4053104	99	76	68,6	cyclictest	4058180	-21	kworker/u4:18+events_unbound	07:34:21	0
4053104	99	74	65,7	cyclictest	4069777	-21	kworker/u4:1+events_unbound	08:49:37	0
4053104	99	71	64,5	cyclictest	4069778	-21	kworker/u4:9+events_unbound	08:14:29	0
4053104	99	71	64,5	cyclictest	4008646	-21	kworker/u4:4+events_unbound	07:29:20	0
4053104	99	71	64,5	cyclictest	3838829	-21	kworker/u4:2+events_unbound	07:14:19	0
4053105	99	68	57,9	cyclictest	53	-21	kswapd0	11:45:12	1
4053104	99	68	56,9	cyclictest	4106061	-21	sshd	09:34:44	0
4053104	99	66	59,5	cyclictest	4135306	-21	kworker/u4:4+events_unbound	10:09:57	0
4053104	99	61	44,7	cyclictest	32403	-21	kworker/u4:2+events_unbound	12:00:18	0
4053104	99	60	48,6	cyclictest	4086612	-21	kworker/u4:10+events_unbound	09:48:42	0
4053105	99	59	22,23	cyclictest	0	-21	swapper/1	12:05:24	1
4053104	99	59	51,6	cyclictest	4060726	-21	kworker/u4:5+events_unbound	08:09:29	0
4053105	99	58	51,5	cyclictest	4060726	-21	kworker/u4:5+events_unbound	09:00:03	1
4053105	99	57	45,6	cyclictest	4126447	-21	kworker/u4:0+events_unbound	09:59:59	1
4053105	99	56	48,6	cyclictest	23652	-21	kworker/u4:5+events_unbound	11:55:14	1
4053104	99	56	45,7	cyclictest	4144114	-21	kworker/u4:10-rpciod	11:05:31	0
4053104	99	56	40,7	cyclictest	4135304	-21	kworker/u4:0+events_unbound	10:12:01	0
4053104	99	56	38,16	cyclictest	4159793	-21	ntpq	10:35:30	0
4053104	99	56	38,14	cyclictest	4124003	-21	apt-get	09:55:13	0
4053105	99	55	41,6	cyclictest	6117	-21	kworker/u4:3+events_unbound	11:40:17	1
4053104	99	55	43,6	cyclictest	4071133	-21	kworker/u4:13+events_unbound	08:42:01	0
4053105	99	54	45,6	cyclictest	4089813	-21	sendmail_mailqu	09:15:42	1
4053105	99	54	43,8	cyclictest	4062040	-21	systemd	07:44:23	1
4053104	99	54	47,5	cyclictest	23658	-21	kworker/u4:14+events_unbound	12:07:59	0
4053104	99	54	46,5	cyclictest	4193459	-21	ssh	11:15:02	0
4053104	99	54	35,17	cyclictest	17474	-21	gltestperf	11:35:19	0
4053105	99	53	46,5	cyclictest	4185047	-21	cut	11:05:17	1
4053105	99	53	46,5	cyclictest	4073719	-21	kworker/u4:17+events_unbound	08:29:59	1
4053105	99	53	42,6	cyclictest	0	-21	swapper/1	10:50:10	1
4053105	99	53	19,21	cyclictest	0	-21	swapper/1	12:25:27	1
4053105	99	52	45,5	cyclictest	13831	-21	threads	11:30:41	1
4053105	99	52	44,6	cyclictest	4008648	-21	kworker/u4:7+events_unbound	07:27:59	1
4053105	99	52	44,5	cyclictest	4139717	-21	kworker/u4:2+events_unbound	10:25:00	1
4053104	99	52	41,5	cyclictest	4058180	-21	kworker/u4:18+events_unbound	07:40:04	0
4053104	99	52	31,18	cyclictest	4177637	-21	unixbench_singl	10:55:41	0
4053105	99	51	44,5	cyclictest	36800	-21	kworker/u4:0+events_unbound	12:18:42	1
4053105	99	51	43,6	cyclictest	4060726	-21	kworker/u4:5+events_unbound	08:10:04	1
4053105	99	51	43,6	cyclictest	21069	-21	basename	11:40:00	1
4053105	99	51	41,8	cyclictest	4132624	-21	systemd	10:04:52	1
4053104	99	51	45,4	cyclictest	15	1	ktimers/0	07:37:02	0
4053104	99	51	44,5	cyclictest	4086612	-21	kworker/u4:10+events_unbound	09:15:02	0
4053104	99	51	42,6	cyclictest	0	-21	swapper/0	09:10:12	0
4053104	99	51	39,6	cyclictest	4049386	-21	kworker/u4:0+events_unbound	07:18:00	0
4053105	99	50	42,6	cyclictest	4008646	-21	kworker/u4:4+events_unbound	07:48:43	1
4053105	99	50	42,5	cyclictest	53706	-21	kworker/u4:12+events_unbound	12:20:22	1
4053105	99	50	42,5	cyclictest	4102527	-21	gltestperf	09:30:20	1
4053105	99	50	17,15	cyclictest	27	1	ktimers/1	09:05:16	1
4053104	99	50	43,5	cyclictest	62503	-21	kworker/u4:2+events_unbound	12:28:59	0
4053104	99	50	43,5	cyclictest	4141963	-21	df_abs	10:15:19	0
4053104	99	50	42,5	cyclictest	34979	-21	gcc	11:55:28	0
4053104	99	50	41,7	cyclictest	4172091	-21	aten_r7power_en	10:50:15	0
4053104	99	50	40,7	cyclictest	56190	-21	df_abs	12:20:19	0
4053104	99	50	39,8	cyclictest	26094	-21	fschecks_time	11:45:20	0
4053104	99	50	38,9	cyclictest	4093880	-21	/usr/sbin/munin	09:20:22	0
4053104	99	50	37,7	cyclictest	36800	-21	kworker/u4:0+events_unbound	12:12:48	0
4053104	99	50	35,9	cyclictest	0	-21	swapper/0	09:25:33	0
4053105	99	49	42,5	cyclictest	4115818	-21	fschecks_time	09:45:20	1
4053105	99	49	41,5	cyclictest	4072120	-21	sendmail_mailqu	08:20:39	1
4053105	99	49	40,7	cyclictest	0	-21	swapper/1	12:30:24	1
4053105	99	49	15,18	cyclictest	0	-21	swapper/1	09:50:31	1
4053104	99	49	43,4	cyclictest	4107033	-21	gltestperf	09:35:20	0
4053104	99	49	42,5	cyclictest	577	-21	ssh	11:15:36	0
4053104	99	49	42,5	cyclictest	23659	-21	kworker/u4:15+events_unbound	11:54:42	0
4053104	99	49	40,7	cyclictest	4084039	-21	systemd	09:09:40	0
4053104	99	49	39,8	cyclictest	4163738	-21	fschecks_time	10:40:21	0
4053104	99	49	37,9	cyclictest	64969	-21	fschecks_time	12:30:29	0
4053105	99	48	41,5	cyclictest	5120	-21	cat	11:20:44	1
4053105	99	48	41,5	cyclictest	4111193	-21	aten_r7power_vo	09:40:18	1
4053105	99	48	41,5	cyclictest	4064576	-21	kworker/u4:3+events_unbound	08:45:03	1
4053105	99	48	41,5	cyclictest	4056909	-21	kworker/u4:16+events_unbound	07:30:03	1
4053105	99	48	40,6	cyclictest	4135780	-21	sshd	10:07:56	1
4053105	99	48	40,6	cyclictest	4074993	-21	kworker/u4:20+events_unbound	08:36:59	1
4053105	99	48	36,10	cyclictest	0	-21	swapper/1	12:10:17	1
4053105	99	48	15,18	cyclictest	0	-21	swapper/1	09:10:24	1
4053104	99	48	41,5	cyclictest	4008646	-21	kworker/u4:4+events_unbound	08:25:03	0
4053104	99	48	40,5	cyclictest	4150787	-21	fschecks_time	10:25:21	0
4053104	99	48	40,5	cyclictest	4146993	-21	proc_pri	10:20:38	0
4053104	99	48	39,7	cyclictest	4158762	-21	latency_hist	10:35:02	0
4053104	99	48	36,9	cyclictest	4168217	-21	if_eth0	10:45:22	0
4053104	99	48	31,10	cyclictest	66209	-21	kworker/u4:6+events_unbound	12:35:47	0
4053105	99	47	40,5	cyclictest	4194044	-21	fschecks_count	11:15:21	1
4053105	99	47	40,5	cyclictest	4154943	-21	df_abs	10:30:17	1
4053105	99	47	40,5	cyclictest	4106768	-21	cpu	09:35:17	1
4053105	99	47	38,6	cyclictest	4142218	-21	gltestperf	10:15:24	1
4053105	99	47	32,7	cyclictest	4064574	-21	kworker/u4:0+events_unbound	08:56:58	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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