OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
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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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Fri Jun 12, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
282853	99	58	54,3	cyclictest	330014	-21	kworker/u8:4+flush-259:0	08:00:25	3
282843	99	51	45,4	cyclictest	340363	-21	base64	08:05:01	0
282845	99	45	38,5	cyclictest	459813	-21	latency_hist	10:00:01	1
282843	99	44	37,5	cyclictest	474901	-21	ntpq	10:10:20	0
282853	99	43	36,5	cyclictest	594821	-21	ntpq	12:05:21	3
282848	99	43	39,3	cyclictest	429164	-21	kworker/u8:4+flush-259:0	09:50:18	2
282843	99	42	38,3	cyclictest	350949	-21	gpgv	08:15:01	0
282843	99	42	36,4	cyclictest	469275	-21	ntpq	10:05:22	0
282845	99	41	36,4	cyclictest	351582	-21	/usr/sbin/munin	08:15:14	1
282848	99	39	33,4	cyclictest	574326	-21	cat	11:50:01	2
282853	99	38	35,2	cyclictest	366881	-21	kworker/u8:2+flush-259:0	08:35:00	3
282848	99	38	34,3	cyclictest	429164	-21	kworker/u8:4+flush-259:0	09:45:16	2
282845	99	38	31,5	cyclictest	422883	-21	ntpq	09:20:22	1
282853	99	37	34,2	cyclictest	507347	-21	kworker/u8:1+flush-259:0	11:25:14	3
282853	99	35	31,3	cyclictest	522491	-21	kworker/u8:4+flush-259:0	11:10:16	3
282853	99	35	31,3	cyclictest	429164	-21	kworker/u8:4+flush-259:0	10:00:16	3
282843	99	35	30,4	cyclictest	360838	-21	ntpq	08:20:21	0
282853	99	34	27,5	cyclictest	511835	-21	dpkg	10:49:28	3
282848	99	34	30,3	cyclictest	424010	-21	/usr/sbin/munin	09:25:24	2
282845	99	34	29,3	cyclictest	324445	-21	store	07:50:01	1
282843	99	34	27,5	cyclictest	579385	-21	latency_hist	11:55:00	0
282843	99	34	27,5	cyclictest	510996	-21	ntpq	10:45:21	0
282843	99	34	27,5	cyclictest	298314	-21	latency_hist	07:25:01	0
282848	99	33	29,3	cyclictest	1320527	-21	kworker/u8:1+flush-259:0	09:10:00	2
282848	99	33	28,3	cyclictest	408279	-21	kworker/u8:3+flush-259:0	09:15:17	2
282845	99	33	28,3	cyclictest	568879	-21	/usr/sbin/munin	11:45:19	1
282853	99	32	28,3	cyclictest	507347	-21	kworker/u8:1+events_unbound	11:05:19	3
282853	99	32	28,3	cyclictest	429164	-21	kworker/u8:4+flush-259:0	09:35:26	3
282853	99	32	28,3	cyclictest	335557	-21	systemd-journal	12:35:00	3
282845	99	32	26,4	cyclictest	287107	-21	ntpq	07:10:20	1
282843	99	32	28,3	cyclictest	335557	-21	systemd-journal	08:45:23	0
282843	99	32	24,4	cyclictest	537713	-21	latency_hist	11:15:01	0
282848	99	31	28,2	cyclictest	366881	-21	kworker/u8:2+flush-259:0	08:40:17	2
282848	99	31	27,2	cyclictest	507347	-21	kworker/u8:1+flush-259:0	12:25:17	2
282845	99	31	20,9	cyclictest	509	-21	rs:main		1
282843	99	31	25,4	cyclictest	600868	-21	latency_hist	12:15:00	0
282843	99	31	25,4	cyclictest	532611	-21	latency_hist	11:10:00	0
282853	99	30	27,2	cyclictest	240144	-21	kworker/u8:0+flush-259:0	07:20:23	3
282848	99	30	24,4	cyclictest	574016	-21	gpgv	11:50:00	2
282843	99	30	25,3	cyclictest	460075	-21	apt-get	10:00:11	0
282848	99	29	25,3	cyclictest	439464	-21	kworker/u8:3+flush-259:0	09:45:00	2
282853	99	28	25,2	cyclictest	428954	-21	kworker/u8:1+flush-259:0	10:25:23	3
282848	99	28	25,2	cyclictest	1320527	-21	kworker/u8:1+flush-259:0	09:00:17	2
282848	99	28	24,3	cyclictest	616336	-21	kworker/u8:0+flush-259:0	12:38:25	2
282848	99	28	24,3	cyclictest	298543	-21	kworker/u8:3+events_unbound	07:30:31	2
282845	99	28	24,3	cyclictest	340459	-21	cat	08:05:01	1
282853	99	27	23,3	cyclictest	553387	-21	kworker/u8:3+events_unbound	11:39:58	3
282853	99	27	23,3	cyclictest	428954	-21	kworker/u8:1+events_unbound	10:15:25	3
282845	99	27	21,4	cyclictest	282779	-21	latency_hist	07:10:01	1
282853	99	26	23,2	cyclictest	387531	-21	kworker/u8:2+flush-259:0	09:10:21	3
282853	99	26	23,2	cyclictest	387531	-21	kworker/u8:2+flush-259:0	09:10:21	3
282853	99	26	22,3	cyclictest	387531	-21	kworker/u8:2+events_unbound	08:50:19	3
282848	99	26	23,2	cyclictest	240144	-21	kworker/u8:0+flush-259:0	07:20:24	2
282848	99	26	22,3	cyclictest	486070	-21	kworker/u8:3+events_unbound	10:40:13	2
282848	99	26	21,3	cyclictest	335557	-21	systemd-journal	10:49:24	2
282845	99	26	21,4	cyclictest	335557	-21	systemd-journal	10:50:01	1
282843	99	26	21,3	cyclictest	330045	-21	apt-get	07:55:10	0
282848	99	25	22,2	cyclictest	501537	-21	kworker/u8:2+flush-259:0	11:00:23	2
282848	99	25	21,3	cyclictest	537336	-21	kworker/u8:0+events_unbound	11:14:25	2
282848	99	25	21,3	cyclictest	335250	-21	kworker/u8:0+flush-259:0	08:10:01	2
282848	99	25	21,3	cyclictest	1320527	-21	kworker/u8:1+events_unbound	08:45:13	2
282848	99	25	18,5	cyclictest	335557	-21	systemd-journal	08:32:24	2
282845	99	25	20,3	cyclictest	470778	-21	/usr/sbin/munin	10:10:13	1
282843	99	25	9,5	cyclictest	558361	-21	latency_hist	11:35:00	0
282843	99	25	22,2	cyclictest	1	-21	systemd	07:45:01	0
282843	99	25	19,5	cyclictest	625708	-21	ntpq	12:35:18	0
282843	99	25	19,4	cyclictest	509	-21	rs:main		0
282853	99	24	22,2	cyclictest	387531	-21	kworker/u8:2+events_unbound	09:20:25	3
282853	99	24	21,2	cyclictest	240144	-21	kworker/u8:0+flush-259:0	07:35:19	3
282853	99	24	20,3	cyclictest	507347	-21	kworker/u8:1+flush-259:0	11:30:20	3
282853	99	24	20,3	cyclictest	501537	-21	kworker/u8:2+flush-259:0	10:50:16	3
282853	99	24	20,3	cyclictest	408279	-21	kworker/u8:3+events_unbound	09:15:27	3
282853	99	24	20,3	cyclictest	335250	-21	kworker/u8:0+flush-259:0	08:21:24	3
282853	99	24	20,3	cyclictest	1320527	-21	kworker/u8:1+events_unbound	08:45:15	3
282853	99	24	19,4	cyclictest	470123	-21	latency_hist	10:10:01	3
282848	99	24	22,2	cyclictest	387531	-21	kworker/u8:2+flush-259:0	09:10:24	2
282848	99	24	22,2	cyclictest	387531	-21	kworker/u8:2+flush-259:0	09:10:23	2
282848	99	24	21,2	cyclictest	600893	-21	kworker/u8:3+flush-259:0	12:20:21	2
282848	99	24	21,2	cyclictest	1320527	-21	kworker/u8:1+events_unbound	08:15:25	2
282848	99	24	20,3	cyclictest	600893	-21	kworker/u8:3+events_unbound	12:17:25	2
282848	99	24	20,3	cyclictest	298543	-21	kworker/u8:3+events_unbound	07:44:25	2
282848	99	24	19,3	cyclictest	491429	-21	/usr/sbin/munin	10:30:18	2
282848	99	24	1,21	cyclictest	1	-21	systemd	11:29:25	2
282853	99	23	20,3	cyclictest	240144	-21	kworker/u8:0+events_unbound	07:29:25	3
282853	99	23	20,2	cyclictest	600893	-21	kworker/u8:3+events_unbound	12:25:25	3
282853	99	23	20,2	cyclictest	491423	-21	kworker/u8:0+flush-259:0	10:30:20	3
282853	99	23	20,2	cyclictest	392964	-21	kworker/u8:0+flush-259:0	09:49:33	3
282853	99	23	20,2	cyclictest	387531	-21	kworker/u8:2+flush-259:0	09:05:21	3
282853	99	23	19,3	cyclictest	507347	-21	kworker/u8:1+flush-259:0	12:00:22	3
282853	99	23	19,3	cyclictest	465208	-21	kworker/u8:0+flush-259:0	10:12:25	3
282853	99	23	19,3	cyclictest	1320527	-21	kworker/u8:1+events_unbound	07:55:01	3
282853	99	23	18,4	cyclictest	611176	-21	latency_hist	12:25:01	3
282853	99	23	18,4	cyclictest	509	-21	rs:main		3
282853	99	23	17,4	cyclictest	579599	-21	gpgv	11:55:00	3
282848	99	23	20,2	cyclictest	240144	-21	kworker/u8:0+flush-259:0	07:35:25	2
282848	99	23	19,2	cyclictest	1320527	-21	kworker/u8:1+events_unbound	08:10:19	2
282845	99	23	19,3	cyclictest	601141	-21	apt-get	12:15:12	1
282845	99	23	19,3	cyclictest	574366	-21	gpgv	11:50:01	1
282845	99	23	19,3	cyclictest	500	-21	systemd-logind	12:10:00	1
282853	99	22	19,2	cyclictest	387531	-21	kworker/u8:2+events_unbound	09:30:26	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34