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 Sun Sep 20, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1951452	2	144	0,5	sleep2	0	-21	swapper/2	12:29:15	2
1811344	2	62	0,5	sleep3	0	-21	swapper/3	10:09:16	3
1630620	99	56	42,10	cyclictest	278	-21	systemd-journal	12:35:00	1
1630624	99	55	44,8	cyclictest	1897371	-21	cp	11:35:01	2
1630624	99	50	42,6	cyclictest	278	-21	systemd-journal	08:05:00	2
1630620	99	50	44,4	cyclictest	1799960	-21	kworker/u8:2+events_unbound	10:15:01	1
1630620	99	50	41,6	cyclictest	278	-21	systemd-journal	08:14:09	1
1630620	99	50	39,9	cyclictest	1701557	-21	ntpq	08:19:11	1
1630620	99	48	39,7	cyclictest	1751992	-21	latency_hist	09:10:01	1
1630620	99	47	42,4	cyclictest	266364	-21	kworker/u8:1+flush-8:0	08:04:02	1
1630620	99	47	41,5	cyclictest	1742628	-21	/usr/sbin/munin	09:04:09	1
1630617	99	47	40,5	cyclictest	1635537	-21	latency_hist	07:15:01	0
1630620	99	46	40,4	cyclictest	1647568	-21	apt-get	07:25:00	1
1630620	99	46	38,6	cyclictest	1757459	-21	/usr/sbin/munin	09:19:14	1
1630620	99	46	37,7	cyclictest	1906396	-21	ntpq	11:44:09	1
1630620	99	46	36,6	cyclictest	278	-21	systemd-journal	08:24:10	1
1630617	99	46	37,7	cyclictest	1891324	-21	ntpq	11:29:07	0
1630620	99	45	37,6	cyclictest	278	-21	systemd-journal	09:24:09	1
1630620	99	45	36,7	cyclictest	1802292	-21	apt-get	10:03:56	1
1630620	99	44	37,5	cyclictest	266364	-21	kworker/u8:1+flush-8:0	07:29:16	1
1630617	99	44	38,4	cyclictest	266364	-21	kworker/u8:1+flush-8:0	07:59:01	0
1630620	99	43	38,3	cyclictest	1877250	-21	kworker/u8:0+flush-8:0	12:39:16	1
1630620	99	43	36,5	cyclictest	1620924	-21	kworker/u8:0+flush-8:0	08:34:16	1
1630620	99	42	37,4	cyclictest	1620924	-21	kworker/u8:0+events_unbound	07:44:01	1
1630620	99	42	35,5	cyclictest	1877250	-21	kworker/u8:0+events_unbound	12:24:09	1
1630620	99	42	31,9	cyclictest	1951184	-21	ntpq	12:29:10	1
1630617	99	42	32,7	cyclictest	1732165	-21	latency_hist	08:50:01	0
1630617	99	42	0,39	cyclictest	1	-21	systemd	11:40:00	0
1913888	2	41	0,3	sleep0	20	1	rcuc/0	11:54:06	0
1630620	99	41	36,4	cyclictest	1877250	-21	kworker/u8:0+flush-8:0	11:39:00	1
1630620	99	41	35,5	cyclictest	1791844	-21	kworker/u8:1+flush-8:0	11:14:13	1
1630620	99	41	34,6	cyclictest	1677715	-21	kworker/u8:2+events_unbound	08:29:11	1
1630620	99	41	33,6	cyclictest	278	-21	systemd-journal	10:25:00	1
1630624	99	40	34,5	cyclictest	1742361	-21	kworker/u8:1+flush-8:0	09:19:13	2
1630620	99	40	34,4	cyclictest	1902350	-21	kworker/u8:2+events_unbound	12:15:00	1
1630620	99	40	31,6	cyclictest	278	-21	systemd-journal	10:57:09	1
1630620	99	39	34,4	cyclictest	1799960	-21	kworker/u8:2+flush-8:0	11:04:07	1
1630620	99	39	34,4	cyclictest	1762116	-21	kworker/u8:4+events_unbound	10:29:14	1
1630620	99	39	34,3	cyclictest	1620924	-21	kworker/u8:0+flush-8:0	07:49:16	1
1630620	99	39	32,5	cyclictest	1851624	-21	apt-get	10:50:00	1
1630620	99	39	32,5	cyclictest	1712750	-21	kworker/u8:1+flush-8:0	08:54:10	1
1630617	99	39	32,4	cyclictest	1777002	-21	latency_hist	09:35:00	0
1630617	99	39	31,6	cyclictest	1796783	-21	latency_hist	09:55:01	0
1630617	99	39	30,7	cyclictest	278	-21	systemd-journal	12:15:00	0
1630620	99	38	33,4	cyclictest	1737365	-21	kworker/u8:3+flush-8:0	09:14:17	1
1630620	99	38	32,4	cyclictest	266364	-21	kworker/u8:1+events_unbound	07:19:05	1
1630620	99	38	32,4	cyclictest	1831925	-21	apt-get	10:33:57	1
1630620	99	38	30,6	cyclictest	1677715	-21	kworker/u8:2+flush-8:0	09:49:14	1
1630617	99	38	31,5	cyclictest	1847244	-21	apt-get	10:48:57	0
1630620	99	37	31,5	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	10:39:14	1
1630620	99	37	29,6	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	11:24:11	1
1630620	99	37	27,7	cyclictest	278	-21	systemd-journal	12:09:09	1
1630617	99	37	30,5	cyclictest	1812135	-21	/usr/sbin/munin	10:14:08	0
1630624	99	36	31,3	cyclictest	1762116	-21	kworker/u8:4+events_unbound	10:10:01	2
1630620	99	36	23,10	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	11:09:11	1
1630617	99	36	32,3	cyclictest	1902350	-21	kworker/u8:2+flush-8:0	11:44:17	0
1630617	99	36	26,8	cyclictest	1871713	-21	cp	11:10:00	0
1630620	99	35	30,4	cyclictest	1910326	-21	kworker/u8:1+events_unbound	11:49:15	1
1630620	99	35	29,4	cyclictest	1912559	-21	apt-get	11:53:58	1
1630620	99	35	29,4	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	11:19:06	1
1630620	99	35	27,6	cyclictest	1887582	-21	apt-get	11:28:55	1
1630620	99	35	26,7	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	09:54:13	1
1630617	99	35	30,3	cyclictest	266364	-21	kworker/u8:1+flush-8:0	07:24:12	0
1630617	99	35	29,4	cyclictest	1902350	-21	kworker/u8:2+events_unbound	12:04:05	0
1630617	99	35	26,7	cyclictest	1921881	-21	latency_hist	12:00:01	0
1630624	99	34	27,5	cyclictest	808610	-21	kworker/u8:4+events_unbound	07:54:14	2
1630620	99	34	29,3	cyclictest	1791844	-21	kworker/u8:1+flush-8:0	10:09:07	1
1630620	99	34	27,5	cyclictest	1902350	-21	kworker/u8:2+flush-8:0	12:04:00	1
1630620	99	34	27,5	cyclictest	1687953	-21	apt-get	08:08:57	1
1630620	99	34	27,5	cyclictest	1687953	-21	apt-get	08:08:57	1
1630620	99	34	1,30	cyclictest	1	-21	systemd	09:59:09	1
1630617	99	34	1,30	cyclictest	1642432	-21	munin-run	07:20:01	0
1630624	99	33	29,2	cyclictest	1752578	-21	aten2_r5power_c	09:13:59	2
1630624	99	33	28,3	cyclictest	1732747	-21	aten2_r5power_c	08:53:59	2
1630624	99	33	24,7	cyclictest	1702325	-21	cp	08:20:01	2
1630620	99	33	29,3	cyclictest	1799960	-21	kworker/u8:2+flush-8:0	10:54:13	1
1630620	99	33	28,3	cyclictest	1726511	-21	needreboot	08:44:09	1
1630617	99	33	23,7	cyclictest	1841506	-21	apt-get	10:40:01	0
1630620	99	32	27,4	cyclictest	1620924	-21	kworker/u8:0+flush-8:0	08:39:04	1
1630620	99	32	26,4	cyclictest	1620924	-21	kworker/u8:0+events_unbound	08:49:06	1
1630620	99	32	22,7	cyclictest	1877250	-21	kworker/u8:0+flush-8:0	11:58:59	1
1630617	99	32	26,4	cyclictest	1801712	-21	cron	10:00:00	0
1630617	99	32	26,4	cyclictest	1791844	-21	kworker/u8:1+events_unbound	11:00:00	0
1630617	99	32	0,30	cyclictest	1	-21	systemd	09:49:09	0
1630624	99	31	27,3	cyclictest	1677715	-21	kworker/u8:2+events_unbound	09:34:10	2
1630620	99	31	25,4	cyclictest	1762116	-21	kworker/u8:4+flush-8:0	10:19:07	1
1630620	99	31	25,4	cyclictest	1620924	-21	kworker/u8:0+flush-8:0	07:39:07	1
1630620	99	31	24,5	cyclictest	1902350	-21	kworker/u8:2+flush-8:0	12:19:09	1
1630617	99	31	26,4	cyclictest	1742361	-21	kworker/u8:1+events_unbound	09:29:16	0
1630617	99	31	26,4	cyclictest	1742361	-21	kworker/u8:1+events_unbound	09:29:16	0
1630617	99	31	22,7	cyclictest	1620924	-21	kworker/u8:0+flush-8:0	08:34:14	0
1625840	2	31	3,8	sleep1	0	-21	swapper/1	07:05:46	1
1630624	99	30	21,7	cyclictest	1657712	-21	turbostat.cron	07:35:00	2
1630620	99	30	25,3	cyclictest	1631672	-21	irqcore	07:14:08	1
1630620	99	30	19,8	cyclictest	1677472	-21	cron	07:55:00	1
1630617	99	30	23,5	cyclictest	1791844	-21	kworker/u8:1+events_unbound	11:10:02	0
1630624	99	29	25,3	cyclictest	1799960	-21	kworker/u8:2+flush-8:0	09:59:16	2
1630624	99	29	25,2	cyclictest	1912778	-21	cpuspeed_turbos	11:54:00	2
1630624	99	29	24,3	cyclictest	1777584	-21	aten2_r5power_c	09:38:59	2
1630620	99	29	23,4	cyclictest	1772057	-21	kworker/u8:0+flush-8:0	09:44:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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