OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Sep 24, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1084272	2	161	0,3	sleep3	75	-21	kworker/3:1-events	12:34:00	3
779454	2	85	0,5	chrt	37	1	rcuc/2	07:24:04	2
763727	99	67	57,7	cyclictest	278	-21	systemd-journal	12:23:55	1
763724	99	61	55,4	cyclictest	964629	-21	kworker/u8:3+events_unbound	10:48:56	0
763727	99	58	54,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	08:44:12	1
763727	99	57	49,6	cyclictest	1048401	-21	cat	11:55:01	1
763732	99	56	51,4	cyclictest	815635	-21	kworker/u8:0+events_unbound	09:04:12	2
763732	99	56	51,4	cyclictest	815635	-21	kworker/u8:0+events_unbound	09:04:12	2
763727	99	55	52,2	cyclictest	815635	-21	kworker/u8:0+events_unbound	09:33:57	1
763724	99	54	49,3	cyclictest	815635	-21	kworker/u8:0+flush-8:0	11:09:01	0
763724	99	54	47,5	cyclictest	855233	-21	apt-get	08:41:09	0
763724	99	53	48,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:00:01	0
763732	99	51	40,8	cyclictest	845024	-21	cat	08:30:00	2
763727	99	51	47,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:33:58	1
763727	99	51	47,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:24:04	1
763724	99	51	47,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	08:23:57	0
763732	99	50	46,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:50:00	2
763727	99	50	37,4	cyclictest	879607	-21	kworker/u8:1+events_unbound	09:09:19	1
763732	99	49	45,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	10:04:11	2
763727	99	49	46,2	cyclictest	909776	-21	kworker/u8:3+events_unbound	09:45:56	1
763724	99	49	39,7	cyclictest	914518	-21	latency_hist	09:40:01	0
763727	99	48	44,3	cyclictest	964629	-21	kworker/u8:3+events_unbound	10:49:13	1
763727	99	48	44,3	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:34:14	1
763727	99	48	44,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:19:03	1
763724	99	48	43,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	09:43:55	0
763727	99	47	43,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	09:00:57	1
763727	99	47	43,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	09:00:56	1
763727	99	47	42,4	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:38:56	1
763724	99	47	42,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	12:33:56	0
763724	99	47	39,6	cyclictest	969612	-21	/usr/sbin/munin	10:39:16	0
763724	99	47	38,7	cyclictest	821149	-21	diskstats	08:08:58	0
763724	99	47	38,7	cyclictest	1019074	-21	apt-get	11:28:52	0
763724	99	47	37,4	cyclictest	939688	-21	kworker/u8:1+events_unbound	12:15:00	0
763732	99	46	38,5	cyclictest	904367	-21	cat	09:30:00	2
763727	99	46	43,2	cyclictest	815635	-21	kworker/u8:0+events_unbound	11:05:02	1
763727	99	46	42,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	11:37:55	1
763727	99	46	42,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	07:51:56	1
763724	99	46	37,7	cyclictest	795611	-21	latency_hist	07:40:01	0
763727	99	45	42,2	cyclictest	830136	-21	kworker/u8:2+events_unbound	09:28:58	1
763727	99	45	41,3	cyclictest	964629	-21	kworker/u8:3+events_unbound	10:41:57	1
763727	99	45	41,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	10:15:57	1
763727	99	45	41,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:14:02	1
763724	99	45	40,4	cyclictest	770801	-21	kworker/u8:3+flush-8:0	08:35:00	0
763724	99	45	40,3	cyclictest	939688	-21	kworker/u8:1+flush-8:0	11:39:07	0
763724	99	45	38,6	cyclictest	4147208	-21	kworker/u8:4+flush-8:0	07:18:59	0
763732	99	44	40,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:54:10	2
763732	99	44	40,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:24:15	2
763727	99	44	40,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	11:04:15	1
763727	99	44	40,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	11:04:15	1
763727	99	44	40,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	10:30:02	1
763727	99	44	40,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	08:35:56	1
763727	99	44	40,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:48:56	1
763727	99	44	40,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:29:38	1
763724	99	44	40,3	cyclictest	815635	-21	kworker/u8:0+events_unbound	10:44:06	0
763724	99	44	39,3	cyclictest	879607	-21	kworker/u8:1+events_unbound	09:19:09	0
763724	99	44	38,4	cyclictest	830136	-21	kworker/u8:2+flush-8:0	09:29:14	0
763732	99	43	38,4	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:04:11	2
763727	99	43	39,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	12:04:41	1
763727	99	43	39,3	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:49:16	1
763727	99	43	39,3	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:29:00	1
763724	99	43	39,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	12:28:55	0
763724	99	43	38,3	cyclictest	879607	-21	kworker/u8:1+flush-8:0	09:14:15	0
763724	99	43	38,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	09:23:56	0
763724	99	43	35,6	cyclictest	864844	-21	latency_hist	08:50:01	0
763727	99	42	38,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	12:17:34	1
763727	99	42	38,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	10:06:56	1
763727	99	42	38,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:26:57	1
763724	99	42	38,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	10:28:56	0
763724	99	42	31,9	cyclictest	790002	-21	ntpq	07:34:07	0
763732	99	41	37,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:19:13	2
763727	99	41	37,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	10:00:56	1
763727	99	41	37,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:06:56	1
763727	99	41	31,7	cyclictest	278	-21	systemd-journal	07:40:01	1
763724	99	41	36,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:43:56	0
763724	99	41	35,4	cyclictest	815635	-21	kworker/u8:0+events_unbound	11:04:07	0
763724	99	41	35,4	cyclictest	815635	-21	kworker/u8:0+events_unbound	11:04:07	0
763724	99	41	31,8	cyclictest	993209	-21	ntpq	10:59:14	0
763727	99	40	36,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:49:03	1
763727	99	40	36,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	07:19:17	1
763727	99	40	36,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	12:34:04	1
763724	99	40	35,4	cyclictest	770801	-21	kworker/u8:3+flush-8:0	08:14:01	0
763724	99	40	35,3	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:29:06	0
763727	99	39	35,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	11:40:56	1
763727	99	39	35,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	08:34:16	1
763727	99	39	35,3	cyclictest	770801	-21	kworker/u8:3+events_unbound	08:12:56	1
763724	99	39	34,4	cyclictest	939688	-21	kworker/u8:1+flush-8:0	11:59:04	0
763724	99	39	33,4	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:54:11	0
763724	99	39	29,4	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:14:10	0
763732	99	38	34,3	cyclictest	879607	-21	kworker/u8:1+events_unbound	09:09:08	2
763727	99	38	34,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	12:06:32	1
763724	99	38	34,3	cyclictest	1003623	-21	kworker/u8:3+events_unbound	11:34:00	0
763724	99	38	29,6	cyclictest	1043250	-21	latency_hist	11:50:01	0
758999	2	38	4,10	sleep1	0	-21	swapper/1	07:05:58	1
763727	99	37	33,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	12:26:30	1
763727	99	37	33,3	cyclictest	830136	-21	kworker/u8:2+events_unbound	09:24:29	1
763727	99	37	33,3	cyclictest	4147208	-21	kworker/u8:4+events_unbound	07:56:46	1
763724	99	37	33,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	10:09:14	0
763724	99	37	32,3	cyclictest	939688	-21	kworker/u8:1+events_unbound	10:25:01	0
763724	99	37	30,5	cyclictest	830136	-21	kworker/u8:2+flush-8:0	08:39:09	0
763724	99	37	26,8	cyclictest	799916	-21	ntpq	07:44:07	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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