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 Sat Aug 22, 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
3708895	2	195	0,5	sleep3	0	-21	swapper/3	19:22:46	3
3733238	2	73	0,3	sleep1	28	1	rcuc/1	19:47:44	1
3715396	2	62	0,2	chrt	575	-21	kworker/3:2+events	19:32:34	3
3693124	99	59	50,6	cyclictest	3744514	-21	latency_hist	20:00:00	1
3693124	99	59	50,6	cyclictest	3744514	-21	latency_hist	20:00:00	1
3693122	99	59	49,7	cyclictest	3849170	-21	/usr/sbin/munin	21:47:52	0
3693122	99	57	46,9	cyclictest	275	-21	systemd-journal	23:20:01	0
3693122	99	56	47,6	cyclictest	275	-21	systemd-journal	23:55:00	0
3693122	99	55	49,4	cyclictest	3548738	-21	kworker/u8:4+flush-8:0	19:47:53	0
3693122	99	55	48,5	cyclictest	3838662	-21	kworker/u8:1+events_unbound	23:10:01	0
3693122	99	54	49,3	cyclictest	3548737	-21	kworker/u8:2+flush-8:0	19:15:05	0
3693122	99	54	45,3	cyclictest	3878619	-21	kworker/u8:3+events_unbound	23:05:01	0
3693122	99	53	42,4	cyclictest	3967186	-21	kworker/u8:0+events_unbound	00:02:42	0
3693122	99	53	42,4	cyclictest	3967186	-21	kworker/u8:0+events_unbound	00:02:42	0
3693122	99	52	47,3	cyclictest	3838662	-21	kworker/u8:1+flush-8:0	22:57:53	0
3693122	99	51	47,3	cyclictest	3838662	-21	kworker/u8:1+events_unbound	22:02:51	0
3693122	99	51	46,4	cyclictest	3983109	-21	kworker/u8:4+events_unbound	00:15:01	0
3914219	2	50	0,3	chrt	575	-21	kworker/3:2+events	22:52:42	3
3693122	99	50	46,3	cyclictest	3893049	-21	kworker/u8:0+events_unbound	22:52:53	0
3693127	99	48	39,6	cyclictest	3834087	-21	cp	21:30:01	2
3693124	99	48	37,8	cyclictest	275	-21	systemd-journal	22:13:18	1
3693122	99	48	42,4	cyclictest	3798917	-21	kworker/u8:0+flush-8:0	21:07:52	0
3693122	99	47	41,4	cyclictest	3804200	-21	kworker/u8:3+events_unbound	21:12:49	0
3693122	99	47	41,4	cyclictest	3747161	-21	kworker/u8:3+flush-8:0	20:42:47	0
3693122	99	46	41,3	cyclictest	3838662	-21	kworker/u8:1+events_unbound	22:37:54	0
3693122	99	46	35,4	cyclictest	3846712	-21	kworker/u8:2+events_unbound	22:15:00	0
3693122	99	44	40,3	cyclictest	3838662	-21	kworker/u8:1+events_unbound	21:42:53	0
3693122	99	44	40,3	cyclictest	3769550	-21	kworker/u8:1+flush-8:0	20:28:19	0
3693122	99	44	39,4	cyclictest	3838662	-21	kworker/u8:1+events_unbound	23:42:53	0
3693122	99	44	38,4	cyclictest	3937670	-21	kworker/u8:2+events_unbound	23:47:48	0
3693124	99	43	25,7	cyclictest	4017911	-21	/usr/sbin/munin	00:37:53	1
3693122	99	43	39,3	cyclictest	3878619	-21	kworker/u8:3+events_unbound	22:17:39	0
3693122	99	43	39,3	cyclictest	3747161	-21	kworker/u8:3+flush-8:0	20:37:54	0
3693122	99	43	37,4	cyclictest	3804200	-21	kworker/u8:3+events_unbound	21:32:37	0
3693124	99	42	33,7	cyclictest	275	-21	systemd-journal	20:57:18	1
3693122	99	42	37,4	cyclictest	3967186	-21	kworker/u8:0+events_unbound	00:35:33	0
3693122	99	42	37,4	cyclictest	3548738	-21	kworker/u8:4+events_unbound	19:52:50	0
3693122	99	42	36,5	cyclictest	3983109	-21	kworker/u8:4+events_unbound	00:10:00	0
3693127	99	41	32,7	cyclictest	3982800	-21	cp	00:00:00	2
3693124	99	41	31,7	cyclictest	275	-21	systemd-journal	22:41:19	1
3693122	99	41	37,3	cyclictest	3804200	-21	kworker/u8:3+flush-8:0	21:17:54	0
3693122	99	41	35,4	cyclictest	3769550	-21	kworker/u8:1+events_unbound	21:02:38	0
3693122	99	41	33,6	cyclictest	275	-21	systemd-journal	21:38:26	0
3693122	99	41	31,3	cyclictest	3744340	-21	kworker/u8:1+events_unbound	20:07:37	0
3688474	2	41	4,10	sleep1	0	-21	swapper/1	19:07:20	1
3693124	99	40	32,6	cyclictest	3646672	-21	kworker/u8:0+flush-8:0	19:42:50	1
3693122	99	40	36,3	cyclictest	3982863	-21	kworker/u8:1+events_unbound	00:27:39	0
3693122	99	40	36,3	cyclictest	3893049	-21	kworker/u8:0+flush-8:0	22:32:39	0
3693122	99	40	35,4	cyclictest	3548737	-21	kworker/u8:2+events_unbound	20:52:38	0
3693122	99	40	35,3	cyclictest	3646672	-21	kworker/u8:0+events_unbound	19:42:42	0
3693122	99	40	34,4	cyclictest	3769550	-21	kworker/u8:1+events_unbound	20:57:50	0
3693124	99	39	31,6	cyclictest	3957313	-21	ntpq	23:32:50	1
3693122	99	39	35,3	cyclictest	3548738	-21	kworker/u8:4+flush-8:0	19:28:20	0
3693122	99	39	35,3	cyclictest	3548737	-21	kworker/u8:2+events_unbound	19:31:20	0
3693122	99	39	34,3	cyclictest	3937670	-21	kworker/u8:2+flush-8:0	23:40:00	0
3693122	99	39	29,8	cyclictest	3778460	-21	ntpq	20:32:47	0
3693122	99	39	28,9	cyclictest	3982754	-21	munin-run	00:00:00	0
3693124	99	38	32,4	cyclictest	3942907	-21	latency_hist	23:20:01	1
3693124	99	38	27,8	cyclictest	3922191	-21	ntpq	22:57:49	1
3693122	99	38	35,2	cyclictest	3838662	-21	kworker/u8:1+events_unbound	22:47:38	0
3693122	99	38	34,3	cyclictest	3893049	-21	kworker/u8:0+flush-8:0	22:28:19	0
3693122	99	38	34,3	cyclictest	3646672	-21	kworker/u8:0+flush-8:0	19:22:54	0
3693122	99	38	33,4	cyclictest	3846712	-21	kworker/u8:2+flush-8:0	22:07:44	0
3693122	99	38	33,3	cyclictest	3983109	-21	kworker/u8:4+events_unbound	00:17:37	0
3693122	99	38	33,3	cyclictest	3878619	-21	kworker/u8:3+flush-8:0	23:12:44	0
3693124	99	37	3,18	cyclictest	0	-21	swapper/1	20:12:37	1
3693124	99	37	29,5	cyclictest	3749490	-21	latency_hist	20:05:00	1
3693124	99	37	28,7	cyclictest	3704126	-21	ntpq	19:17:49	1
3693122	99	37	33,3	cyclictest	3548737	-21	kworker/u8:2+flush-8:0	19:38:19	0
3693122	99	37	32,4	cyclictest	3548738	-21	kworker/u8:4+events_unbound	19:12:48	0
3693122	99	37	32,4	cyclictest	3548737	-21	kworker/u8:2+events_unbound	20:12:38	0
3693122	99	37	31,4	cyclictest	3846712	-21	kworker/u8:2+events_unbound	21:57:44	0
3693122	99	37	28,7	cyclictest	275	-21	systemd-journal	21:25:00	0
3693124	99	36	31,3	cyclictest	3929268	-21	irqrtprio	23:07:42	1
3693124	99	36	30,4	cyclictest	3998889	-21	irqrtprio	00:17:42	1
3693124	99	36	30,4	cyclictest	3809367	-21	apt-get	21:07:33	1
3693124	99	36	17,9	cyclictest	0	-21	swapper/1	20:20:01	1
3693122	99	36	32,3	cyclictest	3893049	-21	kworker/u8:0+flush-8:0	22:42:40	0
3693122	99	36	32,3	cyclictest	3769550	-21	kworker/u8:1+events_unbound	20:47:57	0
3693122	99	36	32,3	cyclictest	3747161	-21	kworker/u8:3+flush-8:0	20:17:52	0
3693122	99	36	31,3	cyclictest	3937670	-21	kworker/u8:2+events_unbound	23:35:00	0
3693127	99	35	10,6	cyclictest	3779676	-21	apt-get	20:37:36	2
3693122	99	35	30,4	cyclictest	3744340	-21	kworker/u8:1+events_unbound	19:58:08	0
3693122	99	35	30,4	cyclictest	3744340	-21	kworker/u8:1+events_unbound	19:58:08	0
3693122	99	35	30,3	cyclictest	3982863	-21	kworker/u8:1+events_unbound	00:32:54	0
3693122	99	35	26,7	cyclictest	3938373	-21	/usr/sbin/munin	23:17:47	0
3693124	99	34	28,4	cyclictest	3993546	-21	fschecks_time	00:12:40	1
3693124	99	34	28,4	cyclictest	3843796	-21	basename	21:40:00	1
3693124	99	34	16,9	cyclictest	0	-21	swapper/1	20:07:37	1
3962958	2	33	0,6	sleep2	0	-21	swapper/2	23:40:00	2
3693124	99	33	0,21	cyclictest	573	-21	runrttasks	00:02:52	1
3693124	99	33	0,21	cyclictest	573	-21	runrttasks	00:02:52	1
3693122	99	33	29,3	cyclictest	3846712	-21	kworker/u8:2+events_unbound	21:53:02	0
3693122	99	33	29,3	cyclictest	3846712	-21	kworker/u8:2+events_unbound	21:53:02	0
3693122	99	33	29,3	cyclictest	3798917	-21	kworker/u8:0+events_unbound	21:25:02	0
3693122	99	33	28,3	cyclictest	3967186	-21	kworker/u8:0+events_unbound	00:22:48	0
3693127	99	32	20,9	cyclictest	3698161	-21	cp	19:15:01	2
3693124	99	32	27,3	cyclictest	3706023	-21	irqrtprio	19:22:43	1
3693124	99	32	24,6	cyclictest	3947329	-21	ntpq	23:22:49	1
3693124	99	32	20,9	cyclictest	3833667	-21	apt-get	21:30:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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