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 Tue Apr 28, 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
3895349	2	150	0,5	sleep3	0	-21	swapper/3	00:16:14	3
3588306	99	59	55,3	cyclictest	2117976	-21	kworker/u8:2+events_unbound	19:36:21	1
3588306	99	58	54,3	cyclictest	3709269	-21	kworker/u8:1+events_unbound	22:11:20	1
3588303	99	56	44,9	cyclictest	3788954	-21	diskstats	22:31:06	0
3588306	99	55	52,2	cyclictest	3853120	-21	kworker/u8:3+events_unbound	23:46:20	1
3588306	99	55	52,2	cyclictest	3777688	-21	kworker/u8:0+events_unbound	23:06:10	1
3588306	99	55	51,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:06:20	1
3588306	99	55	50,4	cyclictest	3768644	-21	kworker/u8:2+events_unbound	22:16:20	1
3588303	99	54	45,6	cyclictest	3887807	-21	latency_hist	00:10:01	0
3588306	99	52	48,3	cyclictest	2739554	-21	kworker/u8:0+events_unbound	19:11:12	1
3588306	99	52	46,4	cyclictest	3877877	-40	logrotate	00:00:01	1
3588303	99	52	43,7	cyclictest	3734280	-21	/usr/sbin/munin	21:36:16	0
3588306	99	51	43,6	cyclictest	3629773	-21	latency_hist	19:50:01	1
3588306	99	50	46,3	cyclictest	3777688	-21	kworker/u8:0+events_unbound	23:26:21	1
3588306	99	50	46,3	cyclictest	3777688	-21	kworker/u8:0+events_unbound	23:26:21	1
3588306	99	50	46,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	22:06:16	1
3588306	99	50	40,7	cyclictest	3901860	-21	ntpq	00:21:20	1
3588306	99	49	40,6	cyclictest	3757865	-21	ntpq	21:56:17	1
3588306	99	48	45,2	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:11:26	1
3588306	99	48	44,3	cyclictest	2739554	-21	kworker/u8:0+events_unbound	19:26:23	1
3588303	99	48	42,5	cyclictest	3689255	-21	kworker/u8:0+flush-8:0	21:56:22	0
3588306	99	47	44,2	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:56:05	1
3588306	99	47	43,3	cyclictest	3853120	-21	kworker/u8:3+events_unbound	23:51:07	1
3588306	99	47	43,3	cyclictest	3843247	-21	kworker/u8:1+events_unbound	00:06:26	1
3588306	99	47	43,3	cyclictest	3812675	-21	kworker/u8:3+events_unbound	22:56:19	1
3588306	99	47	43,3	cyclictest	3709269	-21	kworker/u8:1+events_unbound	21:20:39	1
3588306	99	47	43,3	cyclictest	3709269	-21	kworker/u8:1+events_unbound	21:16:23	1
3588306	99	47	43,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:26:10	1
3588306	99	47	40,5	cyclictest	3857871	-21	latency_hist	23:40:00	1
3588303	99	47	38,6	cyclictest	3684279	-21	latency_hist	20:45:01	0
3588306	99	46	43,2	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:01:09	1
3588306	99	46	42,3	cyclictest	3878121	-21	kworker/u8:3+events_unbound	00:36:16	1
3588306	99	46	42,3	cyclictest	3777688	-21	kworker/u8:0+events_unbound	23:16:06	1
3588306	99	46	42,3	cyclictest	3709269	-21	kworker/u8:1+events_unbound	21:31:22	1
3588306	99	46	42,3	cyclictest	3709269	-21	kworker/u8:1+events_unbound	21:11:11	1
3588306	99	46	42,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:21:13	1
3588306	99	46	42,3	cyclictest	2739554	-21	kworker/u8:0+events_unbound	19:21:10	1
3588306	99	46	35,9	cyclictest	3743007	-21	ntpq	21:41:16	1
3588303	99	46	41,4	cyclictest	3853120	-21	kworker/u8:3+flush-8:0	23:46:12	0
3588303	99	46	40,4	cyclictest	3798842	-21	diskstats	22:41:04	0
3588303	99	46	38,5	cyclictest	3743894	-21	latency_hist	21:45:00	0
3588303	99	46	36,8	cyclictest	280	-21	systemd-journal	21:20:00	0
3588309	99	45	35,7	cyclictest	3887809	-21	awk	00:10:00	2
3588306	99	45	41,3	cyclictest	3843247	-21	kworker/u8:1+events_unbound	23:31:06	1
3588306	99	45	41,3	cyclictest	3777688	-21	kworker/u8:0+events_unbound	22:41:07	1
3588303	99	45	37,6	cyclictest	280	-21	systemd-journal	22:20:01	0
3588306	99	44	40,3	cyclictest	3812675	-21	kworker/u8:3+events_unbound	23:01:19	1
3588306	99	44	40,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:31:21	1
3588306	99	43	39,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:51:07	1
3588306	99	43	39,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:26:10	1
3588306	99	43	39,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	19:51:07	1
3588306	99	43	39,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	19:51:06	1
3588306	99	43	39,3	cyclictest	2117976	-21	kworker/u8:2+events_unbound	20:06:20	1
3588306	99	43	34,7	cyclictest	3888110	-21	/usr/sbin/munin	00:11:16	1
3588303	99	43	33,8	cyclictest	3853465	-21	diskstats	23:36:05	0
3588306	99	42	39,2	cyclictest	3822955	-21	kworker/u8:2+events_unbound	23:11:25	1
3588306	99	42	39,2	cyclictest	3614944	-21	kworker/u8:3+events_unbound	19:56:08	1
3588306	99	42	38,3	cyclictest	3768644	-21	kworker/u8:2+events_unbound	22:51:25	1
3588306	99	42	38,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	22:01:10	1
3588306	99	42	38,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:46:06	1
3588306	99	42	38,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	21:46:06	1
3588306	99	42	34,6	cyclictest	280	-21	systemd-journal	21:40:00	1
3588306	99	42	32,8	cyclictest	3623982	-21	ntpq	19:41:16	1
3588303	99	42	35,6	cyclictest	3843247	-21	kworker/u8:1+flush-8:0	23:56:17	0
3588306	99	41	37,3	cyclictest	3878121	-21	kworker/u8:3+events_unbound	00:31:21	1
3588303	99	41	37,3	cyclictest	3614944	-21	kworker/u8:3+flush-8:0	20:01:13	0
3588303	99	41	35,4	cyclictest	3614944	-21	kworker/u8:3+flush-8:0	21:01:08	0
3588303	99	41	31,8	cyclictest	3907589	-21	apt-get	00:30:00	0
3588309	99	40	29,8	cyclictest	3659350	-21	awk	20:20:01	2
3588306	99	40	36,3	cyclictest	3822955	-21	kworker/u8:2+events_unbound	00:01:17	1
3588306	99	40	36,3	cyclictest	3674389	-21	kworker/u8:1+events_unbound	20:36:07	1
3588306	99	40	36,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:52:38	1
3588303	99	40	35,3	cyclictest	3614944	-21	kworker/u8:3+flush-8:0	22:06:13	0
3588303	99	40	30,8	cyclictest	3713086	-21	ntpq	21:11:17	0
3588306	99	39	35,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:00:39	1
3588303	99	39	35,3	cyclictest	3614944	-21	kworker/u8:3+flush-8:0	20:21:07	0
3588303	99	39	29,8	cyclictest	3843596	-21	diskstats	23:26:07	0
3588303	99	39	29,8	cyclictest	3843596	-21	diskstats	23:26:06	0
3588306	99	38	32,4	cyclictest	280	-21	systemd-journal	22:25:00	1
3588306	99	38	28,3	cyclictest	3838390	-21	apt-get	23:21:04	1
3588309	99	37	31,4	cyclictest	2739554	-21	kworker/u8:0+events_unbound	19:15:03	2
3588306	99	37	33,3	cyclictest	3777688	-21	kworker/u8:0+events_unbound	22:46:10	1
3588306	99	37	33,3	cyclictest	2117976	-21	kworker/u8:2+events_unbound	19:17:02	1
3588306	99	37	27,8	cyclictest	280	-21	systemd-journal	22:33:27	1
3588303	99	37	32,4	cyclictest	3812675	-21	kworker/u8:3+flush-8:0	23:01:07	0
3588303	99	37	29,6	cyclictest	280	-21	systemd-journal	19:30:00	0
3588303	99	37	22,4	cyclictest	0	-21	swapper/0	21:21:06	0
3588309	99	36	30,4	cyclictest	3907801	-21	base64	00:30:01	2
3588306	99	36	32,3	cyclictest	3887520	-21	kworker/u8:0+events_unbound	00:16:09	1
3588306	99	36	32,3	cyclictest	3822955	-21	kworker/u8:2+events_unbound	23:43:39	1
3588306	99	36	32,3	cyclictest	3614944	-21	kworker/u8:3+events_unbound	20:15:38	1
3588303	99	36	32,3	cyclictest	3614944	-21	kworker/u8:3+flush-8:0	20:11:07	0
3588303	99	36	31,4	cyclictest	2117976	-21	kworker/u8:2+flush-8:0	20:51:22	0
3588303	99	36	30,4	cyclictest	2117976	-21	kworker/u8:2+flush-8:0	20:36:12	0
3588303	99	36	27,6	cyclictest	3818290	-21	latency_hist	23:00:01	0
3588309	99	35	30,3	cyclictest	2117976	-21	kworker/u8:2+flush-8:0	19:21:26	2
3588306	99	35	31,3	cyclictest	3822955	-21	kworker/u8:2+events_unbound	00:28:39	1
3588306	99	35	31,3	cyclictest	3768644	-21	kworker/u8:2+events_unbound	22:35:37	1
3588306	99	35	31,3	cyclictest	2117976	-21	kworker/u8:2+events_unbound	20:46:38	1
3588303	99	35	30,4	cyclictest	2117976	-21	kworker/u8:2+flush-8:0	20:06:08	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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