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 Sep 02, 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
508312	2	64	0,3	chrt	575	-21	kworker/3:2-events	20:22:38	3
432329	99	56	48,6	cyclictest	437244	-21	latency_hist	19:15:01	1
432325	99	49	41,6	cyclictest	464141	-21	latency_hist	19:40:01	0
432329	99	48	43,4	cyclictest	544245	-21	kworker/u8:0+flush-8:0	22:02:48	1
432329	99	48	43,4	cyclictest	544245	-21	kworker/u8:0+flush-8:0	22:02:48	1
432325	99	47	38,6	cyclictest	275	-21	systemd-journal	20:55:00	0
432325	99	47	35,9	cyclictest	275	-21	systemd-journal	23:40:00	0
432329	99	46	41,3	cyclictest	538840	-21	kworker/u8:2+events_unbound	20:57:31	1
432329	99	43	38,4	cyclictest	544245	-21	kworker/u8:0+flush-8:0	21:38:01	1
432329	99	41	37,3	cyclictest	3292962	-21	kworker/u8:0+flush-8:0	20:52:33	1
432329	99	41	34,5	cyclictest	275	-21	systemd-journal	23:50:00	1
432329	99	41	34,5	cyclictest	275	-21	systemd-journal	23:50:00	1
432329	99	41	34,5	cyclictest	275	-21	systemd-journal	23:10:00	1
432329	99	40	35,4	cyclictest	678212	-21	kworker/u8:1+flush-8:0	23:42:32	1
432329	99	40	34,5	cyclictest	678212	-21	kworker/u8:1+flush-8:0	23:22:33	1
432325	99	40	36,3	cyclictest	698246	-21	kworker/u8:2+events_unbound	00:10:02	0
432325	99	40	33,5	cyclictest	275	-21	systemd-journal	20:43:39	0
432329	99	39	35,3	cyclictest	722593	-21	kworker/u8:1+flush-8:0	00:12:46	1
432329	99	39	35,3	cyclictest	458963	-21	kworker/u8:3+events_unbound	19:52:33	1
432329	99	39	34,4	cyclictest	722593	-21	kworker/u8:1+flush-8:0	00:37:43	1
432329	99	39	33,4	cyclictest	603798	-21	kworker/u8:3+flush-8:0	23:02:35	1
432325	99	39	27,9	cyclictest	563802	-21	apt-get	21:20:00	0
432325	99	39	25,6	cyclictest	644084	-21	diskstats	22:42:31	0
432329	99	38	34,3	cyclictest	544245	-21	kworker/u8:0+flush-8:0	21:43:00	1
432329	99	38	33,4	cyclictest	538840	-21	kworker/u8:2+flush-8:0	21:50:00	1
432329	99	38	33,4	cyclictest	3292962	-21	kworker/u8:0+events_unbound	20:22:35	1
432329	99	38	33,3	cyclictest	603798	-21	kworker/u8:3+flush-8:0	22:47:32	1
432329	99	38	33,3	cyclictest	544245	-21	kworker/u8:0+events_unbound	22:22:37	1
432329	99	38	32,4	cyclictest	690649	-21	kworker/u8:0+events_unbound	00:22:38	1
432325	99	38	34,3	cyclictest	690649	-21	kworker/u8:0+events_unbound	00:38:53	0
432325	99	38	34,3	cyclictest	603798	-21	kworker/u8:3+events_unbound	23:30:29	0
432325	99	38	31,5	cyclictest	432176	-21	latency_hist	19:10:01	0
432325	99	38	30,6	cyclictest	529799	-21	diskstats	20:47:32	0
432329	99	37	31,5	cyclictest	494357	-21	kworker/u8:1+events_unbound	20:32:42	1
432325	99	37	33,3	cyclictest	690649	-21	kworker/u8:0+events_unbound	23:50:30	0
432325	99	37	33,3	cyclictest	678212	-21	kworker/u8:1+events_unbound	23:47:54	0
432325	99	37	33,3	cyclictest	678212	-21	kworker/u8:1+events_unbound	23:47:54	0
432325	99	37	32,4	cyclictest	603798	-21	kworker/u8:3+events_unbound	23:26:54	0
432333	99	36	27,7	cyclictest	275	-21	systemd-journal	00:00:01	2
432329	99	36	32,3	cyclictest	538840	-21	kworker/u8:2+flush-8:0	21:12:33	1
432329	99	36	30,5	cyclictest	603798	-21	kworker/u8:3+flush-8:0	22:57:37	1
432329	99	36	30,5	cyclictest	544245	-21	kworker/u8:0+flush-8:0	22:40:01	1
432329	99	36	30,4	cyclictest	690649	-21	kworker/u8:0+flush-8:0	23:52:48	1
432329	99	36	28,6	cyclictest	578892	-21	latency_hist	21:35:01	1
432329	99	36	28,6	cyclictest	449685	-21	/usr/sbin/munin	19:27:39	1
432325	99	36	33,2	cyclictest	3292962	-21	kworker/u8:0+events_unbound	19:48:17	0
432325	99	36	32,3	cyclictest	544245	-21	kworker/u8:0+events_unbound	21:25:01	0
432325	99	36	28,3	cyclictest	3292962	-21	kworker/u8:0+events_unbound	19:41:48	0
432329	99	35	31,3	cyclictest	698246	-21	kworker/u8:2+flush-8:0	00:07:32	1
432329	99	35	28,5	cyclictest	718210	-21	/usr/sbin/munin	23:57:39	1
432329	99	35	28,5	cyclictest	544245	-21	kworker/u8:0+events_unbound	23:12:44	1
432329	99	35	27,6	cyclictest	538840	-21	kworker/u8:2+flush-8:0	22:27:43	1
432329	99	35	26,7	cyclictest	599333	-21	/usr/sbin/munin	21:57:46	1
432329	99	35	25,8	cyclictest	275	-21	systemd-journal	19:40:00	1
432329	99	34	30,3	cyclictest	538840	-21	kworker/u8:2+flush-8:0	21:07:40	1
432329	99	34	30,3	cyclictest	458963	-21	kworker/u8:3+flush-8:0	20:37:52	1
432329	99	34	30,3	cyclictest	458963	-21	kworker/u8:3+events_unbound	20:42:35	1
432329	99	34	29,4	cyclictest	544245	-21	kworker/u8:0+flush-8:0	22:52:34	1
432329	99	34	28,5	cyclictest	538840	-21	kworker/u8:2+flush-8:0	21:22:46	1
432325	99	34	30,3	cyclictest	698246	-21	kworker/u8:2+events_unbound	23:59:53	0
432325	99	34	30,3	cyclictest	678212	-21	kworker/u8:1+events_unbound	23:18:22	0
432325	99	34	30,3	cyclictest	558525	-21	kworker/u8:1+events_unbound	21:23:25	0
432325	99	34	30,3	cyclictest	458963	-21	kworker/u8:3+events_unbound	20:05:02	0
432325	99	34	30,3	cyclictest	3292962	-21	kworker/u8:0+events_unbound	20:25:01	0
432329	99	33	29,3	cyclictest	538840	-21	kworker/u8:2+flush-8:0	21:02:42	1
432329	99	33	27,4	cyclictest	538840	-21	kworker/u8:2+events_unbound	21:17:29	1
432329	99	33	25,6	cyclictest	529549	-21	apt-get	20:47:28	1
432325	99	33	24,6	cyclictest	672736	-21	grep	23:07:45	0
432325	99	33	22,2	cyclictest	16	1	rcu_preempt	22:25:01	0
617285	2	32	0,5	sleep3	45	1	irq_work/3	22:12:38	3
432329	99	32	27,4	cyclictest	698246	-21	kworker/u8:2+flush-8:0	00:27:31	1
432329	99	32	27,4	cyclictest	544245	-21	kworker/u8:0+flush-8:0	21:52:39	1
432329	99	32	27,4	cyclictest	3292962	-21	kworker/u8:0+flush-8:0	20:12:41	1
432329	99	32	27,4	cyclictest	3292962	-21	kworker/u8:0+flush-8:0	20:12:41	1
432325	99	32	28,3	cyclictest	544245	-21	kworker/u8:0+events_unbound	22:25:05	0
432325	99	32	28,3	cyclictest	544245	-21	kworker/u8:0+events_unbound	21:48:53	0
432325	99	32	28,3	cyclictest	538840	-21	kworker/u8:2+events_unbound	21:10:02	0
432325	99	32	28,3	cyclictest	494357	-21	kworker/u8:1+events_unbound	20:38:39	0
432325	99	32	25,5	cyclictest	499510	-21	latency_hist	20:15:00	0
432325	99	32	25,5	cyclictest	499510	-21	latency_hist	20:15:00	0
432325	99	32	24,6	cyclictest	623620	-21	latency_hist	22:20:01	0
432325	99	32	0,23	cyclictest	479807	-21	sshd	19:56:53	0
427658	2	32	4,10	sleep2	0	-21	swapper/2	19:07:10	2
432329	99	31	27,2	cyclictest	603798	-21	kworker/u8:3+events_unbound	22:12:47	1
432329	99	31	26,3	cyclictest	458963	-21	kworker/u8:3+events_unbound	20:02:38	1
432329	99	31	25,4	cyclictest	693491	-21	apt-get	23:32:26	1
432325	99	31	27,3	cyclictest	722593	-21	kworker/u8:1+events_unbound	00:08:03	0
432325	99	31	24,5	cyclictest	275	-21	systemd-journal	22:59:07	0
432325	99	31	23,3	cyclictest	538840	-21	kworker/u8:2+events_unbound	21:03:34	0
432325	99	31	22,7	cyclictest	443365	-21	ntpq	19:17:42	0
432325	99	31	17,2	cyclictest	16	1	rcu_preempt	00:01:36	0
432333	99	30	21,7	cyclictest	464431	-21	cat	19:40:01	2
432329	99	30	25,4	cyclictest	3823472	-21	kworker/u8:1+flush-8:0	19:15:03	1
432329	99	30	24,5	cyclictest	3292962	-21	kworker/u8:0+flush-8:0	19:47:39	1
432329	99	30	22,6	cyclictest	275	-21	systemd-journal	23:37:52	1
432329	99	30	21,7	cyclictest	493778	-21	ntpq	20:07:41	1
432325	99	30	7,15	cyclictest	748137	-21	cat	00:27:29	0
432325	99	30	5,22	cyclictest	757080	-21	cat	00:32:47	0
432325	99	30	26,3	cyclictest	658430	-21	kworker/u8:2+events_unbound	23:20:10	0
432325	99	30	26,3	cyclictest	603798	-21	kworker/u8:3+events_unbound	22:49:48	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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