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
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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun Jun 21, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
282282	99	54	47,5	cyclictest	463412	-21	latency_hist	22:05:01	2
282282	99	53	46,5	cyclictest	344532	-21	latency_hist	20:10:00	2
282284	99	51	45,4	cyclictest	468573	-21	latency_hist	22:10:01	3
282282	99	51	47,3	cyclictest	593211	-21	kworker/u8:3+events_unbound	00:31:02	2
282282	99	50	43,5	cyclictest	562007	-21	latency_hist	23:40:00	2
282278	99	48	38,4	cyclictest	375433	-21	latency_hist	20:40:01	1
282282	99	47	44,2	cyclictest	318230	-21	kworker/u8:4+events_unbound	19:49:25	2
282282	99	47	43,3	cyclictest	505247	-21	kworker/u8:3+events_unbound	22:49:24	2
282282	99	47	43,3	cyclictest	505247	-21	kworker/u8:3+events_unbound	22:49:24	2
282282	99	46	43,2	cyclictest	479054	-21	kworker/u8:0+events_unbound	22:29:24	2
282282	99	46	43,2	cyclictest	417288	-21	kworker/u8:4+events_unbound	21:26:25	2
282282	99	46	42,3	cyclictest	297711	-21	kworker/u8:0+events_unbound	20:35:02	2
282275	99	46	41,3	cyclictest	489960	-21	kworker/u8:1+flush-259:0	23:20:01	0
282282	99	45	42,2	cyclictest	396516	-21	kworker/u8:1+events_unbound	21:17:12	2
282282	99	45	41,3	cyclictest	489960	-21	kworker/u8:1+events_unbound	22:58:24	2
282275	99	45	37,5	cyclictest	556820	-21	latency_hist	23:35:00	0
282282	99	44	37,5	cyclictest	335557	-21	systemd-journal	22:45:01	2
282282	99	44	37,5	cyclictest	335557	-21	systemd-journal	22:45:00	2
282278	99	44	39,3	cyclictest	562235	-21	/usr/sbin/munin	23:40:15	1
282284	99	43	36,5	cyclictest	370530	-21	/usr/sbin/munin	20:35:14	3
282282	99	43	40,2	cyclictest	380798	-21	kworker/u8:3+events_unbound	20:57:09	2
282284	99	42	36,4	cyclictest	407015	-21	/usr/sbin/munin	21:10:14	3
282282	99	42	40,2	cyclictest	297711	-21	kworker/u8:0+events_unbound	21:04:24	2
282278	99	42	36,4	cyclictest	380570	-21	latency_hist	20:45:00	1
282282	99	41	35,4	cyclictest	582673	-21	latency_hist	00:00:01	2
282278	99	41	39,1	cyclictest	401711	-21	kworker/1:1+pm	21:46:22	1
282275	99	41	35,4	cyclictest	592985	-21	latency_hist	00:10:02	0
282278	99	40	35,3	cyclictest	587840	-21	latency_hist	00:05:00	1
282275	99	40	35,3	cyclictest	479017	-21	gpgv	22:20:00	0
282282	99	38	35,2	cyclictest	473514	-21	kworker/u8:2+events_unbound	22:36:24	2
282278	99	36	31,3	cyclictest	478902	-21	apt-get	22:20:00	1
282275	99	36	31,3	cyclictest	417288	-21	kworker/u8:4+flush-259:0	21:25:17	0
282275	99	36	31,3	cyclictest	292807	-21	apt-get	19:20:11	0
282284	99	35	29,4	cyclictest	422480	-21	/usr/sbin/munin	21:25:15	3
282284	99	35	27,6	cyclictest	335557	-21	systemd-journal	19:35:01	3
282282	99	35	32,2	cyclictest	593211	-21	kworker/u8:3+events_unbound	00:10:29	2
282282	99	35	30,4	cyclictest	335557	-21	systemd-journal	23:32:23	2
282275	99	35	29,4	cyclictest	287643	-21	/usr/sbin/munin	19:15:14	0
282282	99	34	27,5	cyclictest	335557	-21	systemd-journal	22:14:59	2
282278	99	34	30,3	cyclictest	603570	-21	apt-get	00:20:14	1
282275	99	34	29,3	cyclictest	360519	-21	kworker/u8:2+events_unbound	21:05:17	0
282275	99	34	28,4	cyclictest	335557	-21	systemd-journal	20:22:24	0
282284	99	33	29,3	cyclictest	297711	-21	kworker/u8:0+flush-259:0	20:10:16	3
282284	99	33	27,4	cyclictest	391598	-21	/usr/sbin/munin	20:55:15	3
282282	99	33	30,2	cyclictest	282458	-21	kworker/u8:1+events_unbound	19:10:26	2
282278	99	33	28,3	cyclictest	495116	-21	apt-get	22:35:10	1
282275	99	32	28,3	cyclictest	307946	-21	kworker/u8:3+flush-259:0	20:05:00	0
282275	99	32	27,3	cyclictest	582694	-21	kworker/u8:1+flush-259:0	00:05:00	0
282275	99	32	26,4	cyclictest	335557	-21	systemd-journal	00:37:24	0
282275	99	32	26,4	cyclictest	334179	-21	kworker/u8:2+events_unbound	20:05:12	0
282284	99	31	25,4	cyclictest	603302	-21	latency_hist	00:20:01	3
282284	99	31	25,4	cyclictest	588079	-21	/usr/sbin/munin	00:05:14	3
282282	99	31	28,2	cyclictest	447595	-21	kworker/u8:3+events_unbound	21:56:23	2
282275	99	31	27,3	cyclictest	479556	-21	kworker/u8:4+events_unbound	22:25:17	0
282275	99	31	24,5	cyclictest	483617	-21	ntpq	22:20:21	0
282282	99	30	28,2	cyclictest	360519	-21	kworker/u8:2+events_unbound	20:25:28	2
282282	99	30	28,2	cyclictest	282458	-21	kworker/u8:1+events_unbound	19:24:25	2
282282	99	30	26,3	cyclictest	375692	-21	apt-get	20:40:10	2
282278	99	30	25,4	cyclictest	312214	-21	ntpq	19:35:21	1
282278	99	30	23,5	cyclictest	353987	-21	ntpq	20:15:22	1
282275	99	30	23,4	cyclictest	500454	-21	diskstats	22:40:14	0
282275	99	30	23,4	cyclictest	500454	-21	diskstats	22:40:13	0
282275	99	30	22,6	cyclictest	550821	-21	ntpq	23:25:23	0
282282	99	29	26,2	cyclictest	603324	-21	kworker/u8:1+events_unbound	00:37:14	2
282282	99	29	26,2	cyclictest	447595	-21	kworker/u8:3+events_unbound	22:06:58	2
282278	99	29	24,4	cyclictest	335557	-21	systemd-journal	23:22:23	1
282278	99	29	22,5	cyclictest	602449	-21	ntpq	00:15:21	1
282275	99	29	26,2	cyclictest	271734	-21	kworker/u8:2+flush-259:0	19:40:23	0
282284	99	28	22,4	cyclictest	297711	-21	kworker/u8:0+flush-259:0	19:50:16	3
282284	99	28	21,5	cyclictest	530141	-21	ntpq	23:05:22	3
282282	99	28	25,2	cyclictest	479054	-21	kworker/u8:0+events_unbound	22:24:56	2
282282	99	28	25,2	cyclictest	426423	-21	kworker/u8:0+events_unbound	21:39:58	2
282282	99	28	24,3	cyclictest	520434	-21	kworker/u8:0+events_unbound	23:01:47	2
282278	99	28	24,3	cyclictest	335557	-21	systemd-journal	21:42:30	1
282278	99	28	22,5	cyclictest	452207	-21	ntpq	21:50:22	1
282275	99	28	24,3	cyclictest	297711	-21	kworker/u8:0+flush-259:0	21:20:01	0
282275	99	28	22,4	cyclictest	520655	-21	latency_hist	23:00:01	0
282282	99	27	25,2	cyclictest	417074	-21	kworker/u8:2+events_unbound	21:24:57	2
282278	99	27	23,3	cyclictest	609129	-21	apt-get	00:25:12	1
282275	99	27	24,2	cyclictest	297711	-21	kworker/u8:0+flush-259:0	20:50:16	0
282275	99	27	23,3	cyclictest	334179	-21	kworker/u8:2+flush-259:0	20:15:24	0
282275	99	27	22,3	cyclictest	463418	-21	kworker/u8:0+flush-259:0	22:10:20	0
282275	99	27	22,3	cyclictest	324097	-21	apt-get	19:50:12	0
282275	99	27	21,4	cyclictest	335557	-21	systemd-journal	23:05:01	0
282284	99	26	22,3	cyclictest	437919	-21	apt-get	21:40:11	3
282282	99	26	23,2	cyclictest	473514	-21	kworker/u8:2+events_unbound	22:30:40	2
282282	99	26	23,2	cyclictest	297711	-21	kworker/u8:0+events_unbound	21:05:26	2
282282	99	26	23,2	cyclictest	297711	-21	kworker/u8:0+events_unbound	19:55:34	2
282278	99	26	22,3	cyclictest	489960	-21	kworker/u8:1+flush-259:0	22:55:00	1
282278	99	26	21,4	cyclictest	624364	-21	https	00:40:00	1
282275	99	26	21,4	cyclictest	380798	-21	kworker/u8:3+flush-259:0	20:55:21	0
282275	99	26	19,5	cyclictest	510648	-21	apt-get	22:50:12	0
282282	99	25	23,2	cyclictest	354850	-21	kworker/u8:1+events_unbound	20:20:31	2
282282	99	25	22,2	cyclictest	556846	-21	kworker/u8:0+events_unbound	23:46:38	2
282278	99	25	20,4	cyclictest	335557	-21	systemd-journal	23:38:22	1
282275	99	25	21,3	cyclictest	426423	-21	kworker/u8:0+events_unbound	21:45:22	0
282275	99	25	20,4	cyclictest	593211	-21	kworker/u8:3+events_unbound	00:25:00	0
282284	99	24	17,5	cyclictest	359966	-21	latency_hist	20:25:00	3
282282	99	24	22,2	cyclictest	297711	-21	kworker/u8:0+events_unbound	20:01:30	2
282282	99	24	21,2	cyclictest	489960	-21	kworker/u8:1+events_unbound	23:28:06	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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