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 Mon Dec 01, 2025 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1673340	2	191	0,2	sleep3	48	1	ktimers/3	07:41:17	3
1801233	2	73	0,2	sleep3	47	1	rcuc/3	09:51:15	3
1637248	99	73	68,3	cyclictest	1733621	-21	kworker/u8:4+flush-8:0	09:01:25	1
1637248	99	65	59,4	cyclictest	1902457	-21	kworker/u8:0+events_unbound	11:51:29	1
1948445	2	59	0,5	chrt	0	-21	swapper/3	12:21:13	3
1821389	2	59	0,1	sleep1	1821393	-21	tr	10:11:16	1
1637248	99	58	54,3	cyclictest	1822490	-21	kworker/u8:1+events_unbound	11:05:01	1
1637245	99	58	51,5	cyclictest	1917597	-21	kworker/u8:2+events_unbound	12:26:24	0
1704538	2	57	0,1	sleep1	1704542	-21	cut	08:16:10	1
1637248	99	57	52,4	cyclictest	1627312	-21	kworker/u8:0+events_unbound	07:11:23	1
1637248	99	57	52,3	cyclictest	1668990	-21	kworker/u8:2+flush-8:0	08:26:18	1
1637248	99	56	50,4	cyclictest	1708749	-21	kworker/u8:0+events_unbound	08:40:00	1
1637248	99	56	49,5	cyclictest	1902457	-21	kworker/u8:0+flush-8:0	11:46:15	1
1637248	99	55	49,4	cyclictest	1679423	-21	kworker/u8:1+flush-8:0	08:01:22	1
1637248	99	53	48,4	cyclictest	1917597	-21	kworker/u8:2+events_unbound	12:11:18	1
1637248	99	53	48,4	cyclictest	1877761	-21	kworker/u8:0+events_unbound	11:11:19	1
1637245	99	53	48,4	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	08:36:26	0
1637248	99	52	48,3	cyclictest	279109	-21	kworker/u8:1+flush-8:0	07:21:23	1
1637248	99	52	48,3	cyclictest	1768735	-21	kworker/u8:2+events_unbound	11:06:09	1
1637248	99	52	46,5	cyclictest	1902457	-21	kworker/u8:0+events_unbound	12:01:08	1
1637248	99	52	46,4	cyclictest	1703062	-21	ntpq	08:11:21	1
1637248	99	51	47,3	cyclictest	1891587	-21	kworker/u8:2+flush-8:0	11:21:24	1
1637248	99	51	39,9	cyclictest	1886570	-21	ntpq	11:16:19	1
1637248	99	50	47,2	cyclictest	1778351	-21	kworker/u8:1+events_unbound	09:31:25	1
1637248	99	50	45,4	cyclictest	1822490	-21	kworker/u8:1+flush-8:0	10:46:27	1
1637248	99	50	45,4	cyclictest	1668990	-21	kworker/u8:2+flush-8:0	07:46:25	1
1637248	99	50	44,5	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	07:26:11	1
1637248	99	50	43,5	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	08:31:19	1
1637248	99	50	41,8	cyclictest	1733621	-21	kworker/u8:4+events_unbound	08:56:20	1
1637248	99	50	41,8	cyclictest	1733621	-21	kworker/u8:4+events_unbound	08:56:19	1
1637248	99	49	45,3	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	07:36:10	1
1637248	99	49	43,4	cyclictest	1891587	-21	kworker/u8:2+flush-8:0	11:26:20	1
1637248	99	49	38,8	cyclictest	1936513	-21	ntpq	12:06:19	1
1637248	99	48	42,4	cyclictest	1778351	-21	kworker/u8:1+events_unbound	09:46:22	1
1637248	99	47	42,3	cyclictest	1902457	-21	kworker/u8:0+events_unbound	11:36:08	1
1637248	99	47	35,10	cyclictest	282	-21	systemd-journal	07:31:21	1
1637245	99	47	42,4	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	09:01:23	0
1637245	99	47	42,3	cyclictest	1902457	-21	kworker/u8:0+flush-8:0	11:46:22	0
1637245	99	47	36,8	cyclictest	1642129	-21	latency_hist	07:15:01	0
1637248	99	46	40,4	cyclictest	1917597	-21	kworker/u8:2+events_unbound	12:26:12	1
1637248	99	46	40,4	cyclictest	1822490	-21	kworker/u8:1+events_unbound	10:31:21	1
1637248	99	46	39,6	cyclictest	1822490	-21	kworker/u8:1+events_unbound	10:26:23	1
1637248	99	45	34,8	cyclictest	1787631	-21	ntpq	09:36:18	1
1637245	99	45	41,3	cyclictest	1668990	-21	kworker/u8:2+flush-8:0	07:56:24	0
1637248	99	44	40,3	cyclictest	1768735	-21	kworker/u8:2+events_unbound	10:06:24	1
1637248	99	44	39,3	cyclictest	1917597	-21	kworker/u8:2+flush-8:0	12:36:11	1
1637248	99	44	39,3	cyclictest	1902457	-21	kworker/u8:0+flush-8:0	12:21:18	1
1637248	99	44	35,7	cyclictest	1922604	-21	/usr/sbin/munin	11:56:16	1
1637248	99	43	37,5	cyclictest	1607480	-21	kworker/u8:3+events_unbound	08:21:12	1
1637248	99	43	37,4	cyclictest	1822490	-21	kworker/u8:1+flush-8:0	10:56:20	1
1637248	99	43	37,4	cyclictest	1668990	-21	kworker/u8:2+events_unbound	07:41:22	1
1637245	99	43	38,3	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	07:20:00	0
1637245	99	43	37,4	cyclictest	1927725	-21	kworker/u8:1+flush-8:0	12:31:11	0
1632472	2	43	28,9	sleep1	0	-21	swapper/1	07:05:36	1
1637252	99	42	37,4	cyclictest	1803550	-21	kworker/u8:0+flush-8:0	09:56:23	2
1637248	99	42	38,3	cyclictest	1768735	-21	kworker/u8:2+flush-8:0	10:01:20	1
1637248	99	42	37,4	cyclictest	1927725	-21	kworker/u8:1+flush-8:0	12:15:05	1
1637245	99	42	34,6	cyclictest	1658896	-21	latency_hist	07:30:01	0
1637248	99	41	36,4	cyclictest	1822490	-21	kworker/u8:1+events_unbound	11:31:22	1
1637248	99	41	34,5	cyclictest	1607480	-21	kworker/u8:3+events_unbound	09:16:27	1
1637245	99	41	36,4	cyclictest	1822490	-21	kworker/u8:1+events_unbound	11:36:23	0
1637248	99	40	35,3	cyclictest	1788039	-21	kworker/u8:3+events_unbound	09:51:28	1
1637248	99	40	34,4	cyclictest	1861828	-21	ntpq	10:51:19	1
1637248	99	40	34,4	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	09:26:18	1
1637245	99	40	35,4	cyclictest	1668990	-21	kworker/u8:2+events_unbound	07:51:08	0
1637245	99	40	35,3	cyclictest	1679423	-21	kworker/u8:1+flush-8:0	08:00:31	0
1637248	99	39	33,4	cyclictest	279109	-21	kworker/u8:1+flush-8:0	07:16:25	1
1637248	99	39	33,4	cyclictest	1822490	-21	kworker/u8:1+flush-8:0	10:41:31	1
1637245	99	39	33,4	cyclictest	1917597	-21	kworker/u8:2+flush-8:0	11:56:09	0
1637245	99	39	29,8	cyclictest	1777724	-21	ntpq	09:26:20	0
1637252	99	38	33,4	cyclictest	1679423	-21	kworker/u8:1+flush-8:0	08:06:15	2
1637248	99	38	33,4	cyclictest	1788039	-21	kworker/u8:3+flush-8:0	09:41:20	1
1637248	99	38	26,9	cyclictest	1846958	-21	ntpq	10:36:20	1
1637245	99	38	33,4	cyclictest	1679423	-21	kworker/u8:1+flush-8:0	08:16:23	0
1637245	99	38	33,3	cyclictest	1679423	-21	kworker/u8:1+events_unbound	08:11:17	0
1637245	99	38	32,5	cyclictest	1857452	-21	kworker/u8:3+flush-8:0	11:00:05	0
1637245	99	38	31,5	cyclictest	1891587	-21	kworker/u8:2+flush-8:0	11:31:23	0
1637252	99	37	31,4	cyclictest	279109	-21	kworker/u8:1+flush-8:0	07:15:05	2
1637252	99	37	29,6	cyclictest	282	-21	systemd-journal	08:00:00	2
1637248	99	37	33,3	cyclictest	1679423	-21	kworker/u8:1+flush-8:0	08:06:30	1
1637248	99	37	32,4	cyclictest	1927725	-21	kworker/u8:1+events_unbound	12:31:07	1
1637248	99	37	31,4	cyclictest	1768735	-21	kworker/u8:2+flush-8:0	09:21:15	1
1637248	99	37	31,4	cyclictest	1607480	-21	kworker/u8:3+events_unbound	08:51:17	1
1637248	99	37	31,4	cyclictest	1607480	-21	kworker/u8:3+events_unbound	08:51:17	1
1637248	99	37	29,6	cyclictest	1732794	-21	ntpq	08:41:19	1
1637245	99	37	31,4	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	08:51:29	0
1637245	99	37	31,4	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	08:51:29	0
1637245	99	37	0,35	cyclictest	1862709	-21	munin-run	10:55:01	0
1637248	99	36	32,3	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	08:46:44	1
1637245	99	36	32,3	cyclictest	1607480	-21	kworker/u8:3+flush-8:0	09:06:14	0
1637245	99	36	29,5	cyclictest	1668990	-21	kworker/u8:2+flush-8:0	07:46:31	0
1637252	99	35	28,5	cyclictest	1788039	-21	kworker/u8:3+events_unbound	09:50:01	2
1637252	99	35	28,5	cyclictest	1664065	-21	apt-get	07:35:00	2
1637245	99	35	31,3	cyclictest	1788039	-21	kworker/u8:3+events_unbound	09:51:23	0
1637245	99	35	30,3	cyclictest	1768735	-21	kworker/u8:2+events_unbound	09:21:12	0
1637245	99	35	26,6	cyclictest	1931562	-21	ntpq	12:01:17	0
1637252	99	34	29,4	cyclictest	1753647	-21	kworker/u8:1+events_unbound	09:11:22	2
1637248	99	34	29,4	cyclictest	1768735	-21	kworker/u8:2+events_unbound	10:16:21	1
1637248	99	34	29,4	cyclictest	1679423	-21	kworker/u8:1+events_unbound	07:52:00	1
1637245	99	34	29,3	cyclictest	1803550	-21	kworker/u8:0+flush-8:0	10:06:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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