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 Wed Aug 26, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2812321	2	91	0,2	sleep3	575	-21	kworker/3:2-mm_percpu_wq	00:17:42	3
2556686	2	83	0,6	chrt	0	-21	swapper/2	20:02:38	2
2504153	99	55	47,6	cyclictest	2620289	-21	latency_hist	21:05:00	1
2504153	99	55	47,6	cyclictest	2620289	-21	latency_hist	21:05:00	1
2504151	99	54	45,6	cyclictest	2600531	-21	latency_hist	20:45:01	0
2673220	2	50	0,2	chrt	29	1	ktimers/1	21:57:43	1
2504151	99	49	44,4	cyclictest	1436633	-21	kworker/u8:2+flush-8:0	20:22:51	0
2504153	99	48	39,7	cyclictest	2773833	-21	apt-get	23:40:01	1
2504153	99	47	42,4	cyclictest	2649937	-21	kworker/u8:2+flush-8:0	22:57:46	1
2504153	99	47	42,3	cyclictest	2665020	-21	kworker/u8:1+flush-8:0	23:57:38	1
2504153	99	47	42,3	cyclictest	2509090	-21	kworker/u8:1+flush-8:0	20:02:50	1
2504153	99	47	41,3	cyclictest	1436633	-21	kworker/u8:2+events_unbound	20:37:41	1
2504157	99	46	40,4	cyclictest	2665020	-21	kworker/u8:1+events_unbound	22:00:00	2
2504153	99	46	40,4	cyclictest	2649937	-21	kworker/u8:2+events_unbound	22:22:40	1
2504153	99	45	40,3	cyclictest	2595834	-21	kworker/u8:0+events_unbound	20:42:38	1
2504151	99	45	40,4	cyclictest	2509090	-21	kworker/u8:1+flush-8:0	19:22:40	0
2504157	99	44	40,3	cyclictest	2803711	-21	kworker/u8:1+events_unbound	00:27:40	2
2504153	99	44	35,7	cyclictest	2704421	-21	cp	22:30:00	1
2504151	99	44	36,6	cyclictest	2769317	-21	/usr/sbin/munin	23:37:46	0
2504151	99	44	35,7	cyclictest	275	-21	systemd-journal	21:03:20	0
2504151	99	44	35,7	cyclictest	275	-21	systemd-journal	21:03:20	0
2504153	99	43	37,4	cyclictest	2536416	-21	/usr/sbin/munin	19:42:52	1
2504153	99	43	37,4	cyclictest	1696005	-21	kworker/u8:3+flush-8:0	19:12:38	1
2504151	99	43	38,4	cyclictest	2585991	-21	kworker/u8:3+events_unbound	20:47:55	0
2499496	2	43	3,35	sleep1	0	-21	swapper/1	19:07:00	1
2504153	99	42	37,4	cyclictest	2541241	-21	kworker/u8:0+events_unbound	20:27:47	1
2504153	99	42	37,4	cyclictest	1436633	-21	kworker/u8:2+flush-8:0	19:32:47	1
2504153	99	42	36,5	cyclictest	2649937	-21	kworker/u8:2+flush-8:0	23:47:37	1
2504153	99	42	36,5	cyclictest	2649937	-21	kworker/u8:2+flush-8:0	22:47:46	1
2504153	99	42	35,4	cyclictest	2818960	-21	latency_hist	00:25:01	1
2504153	99	42	33,7	cyclictest	275	-21	systemd-journal	21:32:19	1
2504153	99	42	33,7	cyclictest	2541396	-21	/usr/sbin/munin	19:47:45	1
2504157	99	41	36,4	cyclictest	2595834	-21	kworker/u8:0+flush-8:0	21:30:21	2
2504153	99	41	36,4	cyclictest	2595834	-21	kworker/u8:0+events_unbound	21:27:38	1
2504153	99	41	36,4	cyclictest	2541241	-21	kworker/u8:0+events_unbound	20:17:52	1
2504153	99	41	34,5	cyclictest	2649937	-21	kworker/u8:2+flush-8:0	23:12:49	1
2504157	99	40	35,4	cyclictest	2509090	-21	kworker/u8:1+events_unbound	19:27:49	2
2504153	99	40	35,4	cyclictest	2541241	-21	kworker/u8:0+flush-8:0	19:52:50	1
2504153	99	40	33,5	cyclictest	2764405	-21	apt-get	23:32:32	1
2504153	99	40	31,6	cyclictest	2570603	-21	latency_hist	20:15:01	1
2504151	99	40	31,6	cyclictest	2644988	-21	latency_hist	21:30:01	0
2504153	99	39	35,3	cyclictest	2665020	-21	kworker/u8:1+events_unbound	22:52:50	1
2504153	99	39	34,4	cyclictest	2585991	-21	kworker/u8:3+events_unbound	21:22:55	1
2504153	99	39	33,5	cyclictest	2665020	-21	kworker/u8:1+flush-8:0	22:32:49	1
2504153	99	39	33,5	cyclictest	2509090	-21	kworker/u8:1+flush-8:0	19:22:51	1
2504151	99	39	30,6	cyclictest	2535980	-21	latency_hist	19:40:01	0
2504157	99	38	33,4	cyclictest	2585991	-21	kworker/u8:3+events_unbound	22:10:00	2
2504153	99	38	34,3	cyclictest	2665020	-21	kworker/u8:1+flush-8:0	23:42:46	1
2504153	99	38	33,4	cyclictest	2665020	-21	kworker/u8:1+events_unbound	23:27:47	1
2504153	99	38	32,4	cyclictest	2585991	-21	kworker/u8:3+flush-8:0	21:42:41	1
2504153	99	38	30,6	cyclictest	2824329	-21	/usr/sbin/munin	00:32:51	1
2504151	99	38	31,5	cyclictest	2610425	-21	latency_hist	20:55:01	0
2504151	99	38	30,6	cyclictest	2768904	-21	latency_hist	23:35:01	0
2504157	99	37	33,3	cyclictest	2829108	-21	kworker/u8:3+events_unbound	00:37:45	2
2504157	99	37	33,3	cyclictest	1436633	-21	kworker/u8:2+events_unbound	19:15:05	2
2504157	99	37	31,4	cyclictest	275	-21	systemd-journal	19:48:09	2
2504157	99	37	30,5	cyclictest	2828847	-21	turbostat.cron	00:35:00	2
2504153	99	37	31,4	cyclictest	2704785	-21	kworker/u8:0+events_unbound	23:07:45	1
2504151	99	37	28,7	cyclictest	2804537	-21	/usr/sbin/munin	00:12:52	0
2504157	99	36	28,6	cyclictest	2749183	-21	turbostat.cron	23:15:00	2
2504153	99	36	26,8	cyclictest	2564902	-21	ntpq	20:07:45	1
2504157	99	35	26,7	cyclictest	2675385	-21	diskstats	22:02:35	2
2504153	99	35	30,4	cyclictest	2509090	-21	kworker/u8:1+events_unbound	19:37:51	1
2504153	99	35	29,5	cyclictest	1436633	-21	kworker/u8:2+flush-8:0	21:17:41	1
2504153	99	35	29,4	cyclictest	275	-21	systemd-journal	00:14:23	1
2504153	99	35	29,4	cyclictest	2665020	-21	kworker/u8:1+flush-8:0	23:52:43	1
2504153	99	35	28,5	cyclictest	2814004	-21	latency_hist	00:20:01	1
2504153	99	35	28,5	cyclictest	2472778	-21	kworker/u8:0+flush-8:0	19:17:38	1
2504151	99	35	23,9	cyclictest	275	-21	systemd-journal	22:20:00	0
2504153	99	34	30,2	cyclictest	2694447	-21	systemctl	22:20:00	1
2504153	99	34	29,3	cyclictest	2585991	-21	kworker/u8:3+flush-8:0	20:57:46	1
2504151	99	34	28,4	cyclictest	1696005	-21	kworker/u8:3+flush-8:0	19:12:50	0
2504157	99	33	26,5	cyclictest	2590617	-21	cat	20:35:00	2
2504153	99	33	28,4	cyclictest	2585991	-21	kworker/u8:3+events_unbound	22:12:50	1
2504153	99	33	25,6	cyclictest	275	-21	systemd-journal	22:05:20	1
2504153	99	33	25,6	cyclictest	2704785	-21	kworker/u8:0+events_unbound	23:22:19	1
2504153	99	33	25,6	cyclictest	2704785	-21	kworker/u8:0+events_unbound	23:22:19	1
2504153	99	33	24,7	cyclictest	2555038	-21	ntpq	19:57:45	1
2504153	99	33	23,8	cyclictest	275	-21	systemd-journal	20:55:00	1
2504151	99	33	26,5	cyclictest	275	-21	systemd-journal	22:47:21	0
2504151	99	33	23,8	cyclictest	275	-21	systemd-journal	23:30:00	0
2504153	99	32	26,4	cyclictest	2794130	-21	kworker/u8:4+flush-8:0	00:07:44	1
2504153	99	32	25,6	cyclictest	2665020	-21	kworker/u8:1+flush-8:0	21:52:47	1
2504151	99	32	23,7	cyclictest	275	-21	systemd-journal	21:55:00	0
2504151	99	32	23,6	cyclictest	275	-21	systemd-journal	23:05:00	0
2504151	99	32	22,8	cyclictest	2744941	-21	diskstats	23:12:35	0
2504157	99	31	26,4	cyclictest	2665020	-21	kworker/u8:1+events_unbound	23:35:18	2
2504157	99	31	25,4	cyclictest	2649937	-21	kworker/u8:2+events_unbound	22:45:02	2
2504153	99	31	26,3	cyclictest	2718665	-21	ntpq	22:42:46	1
2504151	99	31	28,2	cyclictest	2729244	-21	systemd-run	22:55:00	0
2504151	99	31	26,3	cyclictest	2585991	-21	kworker/u8:3+events_unbound	21:37:50	0
2504151	99	31	26,3	cyclictest	2525902	-21	kworker/u8:3+flush-8:0	19:42:41	0
2504151	99	31	24,5	cyclictest	2809508	-21	apt-get	00:17:32	0
2504151	99	31	21,8	cyclictest	2704977	-21	munin-node	22:32:34	0
2628786	2	30	0,2	sleep0	0	-21	swapper/0	21:12:51	0
2504157	99	30	22,6	cyclictest	2585634	-21	cat	20:30:01	2
2504153	99	30	26,3	cyclictest	2585991	-21	kworker/u8:3+flush-8:0	21:13:01	1
2504153	99	30	24,4	cyclictest	2585991	-21	kworker/u8:3+flush-8:0	21:37:56	1
2504153	99	30	23,5	cyclictest	275	-21	systemd-journal	20:47:19	1
2504151	99	30	27,2	cyclictest	2585991	-21	kworker/u8:3+events_unbound	21:22:53	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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