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
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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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Dec 11, 2025 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1715987	99	68	58,7	cyclictest	1721360	-21	cp	19:15:01	2
1715983	99	68	62,4	cyclictest	1916853	-21	kworker/u8:2+events_unbound	22:36:18	1
1715983	99	64	59,4	cyclictest	1772435	-21	kworker/u8:1+events_unbound	20:31:13	1
1715980	99	62	52,7	cyclictest	1901176	-21	ntpq	22:11:14	0
1913825	2	60	0,1	sleep0	1913826	-21	cat	22:26:10	0
1715983	99	58	53,4	cyclictest	1850519	-21	kworker/u8:2+flush-8:0	21:56:16	1
1935657	2	57	0,2	sleep3	0	-21	swapper/3	22:46:11	3
1715983	99	56	49,5	cyclictest	1935931	-21	kworker/u8:1+events_unbound	23:31:15	1
1715983	99	56	44,4	cyclictest	1684131	-21	kworker/u8:3+flush-8:0	19:15:05	1
1715983	99	55	49,5	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	22:06:20	1
1715983	99	54	50,3	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	21:16:20	1
1715983	99	54	47,5	cyclictest	1876803	-21	kworker/u8:3+events_unbound	22:26:14	1
1746119	2	53	0,2	sleep3	47	1	rcuc/3	19:36:09	3
1715983	99	53	49,3	cyclictest	1971478	-21	kworker/u8:3+flush-8:0	23:56:17	1
1715980	99	53	46,5	cyclictest	1772435	-21	kworker/u8:1+events_unbound	20:56:22	0
1715983	99	51	44,5	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	22:11:21	1
1715983	99	50	45,4	cyclictest	1777839	-21	kworker/u8:2+flush-8:0	20:41:04	1
1715983	99	50	43,5	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	21:01:15	1
1715983	99	49	44,4	cyclictest	1876803	-21	kworker/u8:3+flush-8:0	22:16:18	1
1715983	99	49	44,4	cyclictest	1876803	-21	kworker/u8:3+flush-8:0	22:16:17	1
1715983	99	49	43,5	cyclictest	2026228	-21	kworker/u8:2+flush-8:0	00:21:13	1
1715983	99	49	42,5	cyclictest	1826980	-21	kworker/u8:3+events_unbound	21:06:13	1
1715987	99	48	44,3	cyclictest	1911678	-21	kworker/u8:0+flush-8:0	23:21:19	2
1715983	99	48	44,3	cyclictest	1911678	-21	kworker/u8:0+flush-8:0	23:06:12	1
1715983	99	48	42,4	cyclictest	1935931	-21	kworker/u8:1+flush-8:0	00:06:16	1
1715983	99	48	41,6	cyclictest	1916853	-21	kworker/u8:2+flush-8:0	23:26:16	1
1715983	99	48	41,5	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	20:21:13	1
2044259	2	47	0,2	sleep3	48	1	ktimers/3	00:36:11	3
1715983	99	47	39,6	cyclictest	1911678	-21	kworker/u8:0+flush-8:0	23:21:13	1
1715983	99	46	41,3	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	21:21:20	1
1715983	99	46	37,7	cyclictest	2006816	-21	/usr/sbin/munin	00:01:12	1
1715983	99	45	40,4	cyclictest	1946570	-21	kworker/u8:3+events_unbound	23:11:13	1
1715983	99	45	39,5	cyclictest	1911678	-21	kworker/u8:0+flush-8:0	22:56:16	1
1715983	99	45	38,5	cyclictest	1850519	-21	kworker/u8:2+flush-8:0	21:41:15	1
1715983	99	45	37,5	cyclictest	1921884	-21	latency_hist	22:35:01	1
1715980	99	45	35,8	cyclictest	1990826	-21	ntpq	23:41:14	0
1715983	99	44	40,3	cyclictest	2016201	-21	kworker/u8:0+flush-8:0	00:31:19	1
1715983	99	44	40,3	cyclictest	1876803	-21	kworker/u8:3+events_unbound	22:01:20	1
1715983	99	44	38,5	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	20:26:17	1
1715983	99	44	38,4	cyclictest	1684131	-21	kworker/u8:3+flush-8:0	19:11:20	1
1715983	99	44	37,5	cyclictest	1716113	-21	kworker/u8:1+flush-8:0	19:31:08	1
1715987	99	43	38,3	cyclictest	1916853	-21	kworker/u8:2+events_unbound	23:31:22	2
1715983	99	43	39,3	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	21:46:09	1
1715983	99	43	38,4	cyclictest	1911678	-21	kworker/u8:0+flush-8:0	23:16:19	1
1715983	99	43	38,4	cyclictest	1716113	-21	kworker/u8:1+flush-8:0	19:21:15	1
1715983	99	43	37,4	cyclictest	1916853	-21	kworker/u8:2+flush-8:0	22:51:07	1
1715983	99	43	36,5	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	21:36:16	1
1715983	99	43	35,6	cyclictest	1946570	-21	kworker/u8:3+flush-8:0	23:01:16	1
1975896	2	42	0,3	chrt	20	1	rcuc/0	23:26:13	0
1715983	99	42	36,4	cyclictest	2026228	-21	kworker/u8:2+events_unbound	00:36:17	1
1715983	99	42	33,7	cyclictest	1971478	-21	kworker/u8:3+flush-8:0	23:51:10	1
1715980	99	42	29,10	cyclictest	1941671	-21	apt-get	22:55:00	0
1715983	99	41	37,3	cyclictest	1747671	-21	kworker/u8:0+events_unbound	20:46:18	1
1715983	99	41	37,3	cyclictest	1747671	-21	kworker/u8:0+events_unbound	20:06:22	1
1715983	99	41	37,3	cyclictest	1747671	-21	kworker/u8:0+events_unbound	20:06:21	1
1715983	99	41	35,4	cyclictest	1876803	-21	kworker/u8:3+flush-8:0	22:21:04	1
1715983	99	41	34,5	cyclictest	1723322	-21	kworker/u8:4+flush-8:0	19:51:13	1
1715980	99	41	32,7	cyclictest	1902386	-21	apt-get	22:15:59	0
1715980	99	41	32,7	cyclictest	1902386	-21	apt-get	22:15:59	0
1715980	99	41	28,10	cyclictest	282	-21	systemd-journal	23:50:00	0
1715983	99	40	34,4	cyclictest	1772435	-21	kworker/u8:1+flush-8:0	20:51:14	1
1715980	99	40	29,8	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	21:01:17	0
1715987	99	39	31,6	cyclictest	282	-21	systemd-journal	19:44:59	2
1715983	99	39	33,5	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	20:16:13	1
1715983	99	39	33,5	cyclictest	1747671	-21	kworker/u8:0+events_unbound	19:56:13	1
1715983	99	39	32,5	cyclictest	1826980	-21	kworker/u8:3+events_unbound	21:26:20	1
1715983	99	38	32,4	cyclictest	2016201	-21	kworker/u8:0+events_unbound	00:26:11	1
1715983	99	38	32,4	cyclictest	1935931	-21	kworker/u8:1+flush-8:0	23:41:12	1
1715983	99	38	32,4	cyclictest	1716113	-21	kworker/u8:1+flush-8:0	19:26:16	1
1715983	99	38	28,8	cyclictest	1772435	-21	kworker/u8:1+flush-8:0	20:36:14	1
1715987	99	37	29,6	cyclictest	282	-21	systemd-journal	22:00:00	2
1715987	99	37	28,7	cyclictest	282	-21	systemd-journal	20:35:09	2
1715983	99	37	31,5	cyclictest	1916853	-21	kworker/u8:2+flush-8:0	22:46:15	1
1715980	99	37	29,6	cyclictest	1980866	-21	ntpq	23:31:12	0
1715980	99	37	22,6	cyclictest	2046024	-21	unixbench_singl	00:36:21	0
1715987	99	36	31,3	cyclictest	1850519	-21	kworker/u8:2+events_unbound	21:51:21	2
1715983	99	36	31,3	cyclictest	1777839	-21	kworker/u8:2+events_unbound	20:11:03	1
1715983	99	36	29,5	cyclictest	2021654	-21	latency_hist	00:15:01	1
1715983	99	36	28,6	cyclictest	1716113	-21	kworker/u8:1+flush-8:0	19:36:14	1
1715980	99	36	29,4	cyclictest	1747583	-21	grep	19:36:18	0
1715980	99	36	28,6	cyclictest	1737979	-21	latency_hist	19:30:01	0
1715983	99	35	31,3	cyclictest	1684131	-21	kworker/u8:3+flush-8:0	19:41:04	1
1715983	99	35	29,4	cyclictest	1971478	-21	kworker/u8:3+events_unbound	23:36:20	1
1715983	99	35	26,6	cyclictest	1715823	-21	latency_hist	19:10:01	1
1715980	99	35	30,4	cyclictest	1837791	-21	kworker/u8:1+flush-8:0	22:31:16	0
1715980	99	35	28,4	cyclictest	1	-21	systemd	00:30:00	0
1715980	99	35	27,6	cyclictest	1877390	-21	/usr/sbin/munin	21:51:13	0
1715987	99	34	26,6	cyclictest	1832605	-21	gpgv	21:05:01	2
1715983	99	34	30,3	cyclictest	1777839	-21	kworker/u8:2+flush-8:0	20:56:09	1
1715983	99	34	29,4	cyclictest	1837791	-21	kworker/u8:1+events_unbound	21:51:07	1
1715983	99	34	28,5	cyclictest	1747671	-21	kworker/u8:0+flush-8:0	19:46:06	1
1715987	99	33	29,3	cyclictest	1747671	-21	kworker/u8:0+events_unbound	21:11:21	2
1715983	99	33	27,4	cyclictest	1826980	-21	kworker/u8:3+flush-8:0	21:31:21	1
1715980	99	33	10,15	cyclictest	1951037	-21	ld	23:01:16	0
1715983	99	32	25,5	cyclictest	1971478	-21	kworker/u8:3+flush-8:0	23:46:04	1
1715983	99	32	25,5	cyclictest	1911678	-21	kworker/u8:0+events_unbound	22:41:02	1
1715980	99	32	23,6	cyclictest	1797403	-21	latency_hist	20:30:01	0
1715980	99	31	9,14	cyclictest	2031021	-21	cat	00:21:19	0
1715980	99	31	25,4	cyclictest	1997158	-21	cpuspeed_turbos	23:51:04	0
1715983	99	30	23,5	cyclictest	1842466	-21	latency_hist	21:15:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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