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 Fri Aug 28, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1943283	2	63	0,2	sleep1	29	1	ktimers/1	19:57:42	1
1892742	99	57	50,6	cyclictest	2113888	-21	kworker/u8:0+flush-8:0	23:07:46	1
2027020	2	56	0,6	chrt	0	-21	swapper/2	21:22:42	2
1892739	99	53	47,4	cyclictest	1909478	-21	latency_hist	19:25:01	0
1892739	99	51	44,5	cyclictest	2128548	-21	latency_hist	23:05:01	0
1892742	99	49	43,4	cyclictest	1855456	-21	kworker/u8:1+flush-8:0	19:13:14	1
1892742	99	49	41,6	cyclictest	1969675	-21	/usr/sbin/munin	20:27:49	1
1892739	99	49	43,5	cyclictest	2034263	-21	kworker/u8:3+flush-8:0	22:57:49	0
1892742	99	48	43,3	cyclictest	572672	-21	kworker/u8:4+events_unbound	20:47:49	1
1892742	99	48	42,5	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	21:27:47	1
1892742	99	48	38,8	cyclictest	275	-21	systemd-journal	21:40:00	1
1892742	99	47	41,4	cyclictest	2183018	-21	kworker/u8:3+events_unbound	00:12:38	1
1892739	99	47	40,5	cyclictest	2168206	-21	latency_hist	23:45:01	0
1892742	99	46	42,3	cyclictest	2143946	-21	kworker/u8:1+events_unbound	23:42:46	1
1892742	99	46	42,3	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	19:47:46	1
1892742	99	46	39,5	cyclictest	2208035	-21	latency_hist	00:25:00	1
1892742	99	45	41,3	cyclictest	1913634	-21	kworker/u8:0+flush-8:0	20:02:42	1
1892742	99	45	40,3	cyclictest	1745305	-21	kworker/u8:2+events_unbound	19:42:41	1
1892742	99	44	38,4	cyclictest	2028900	-21	kworker/u8:2+events_unbound	21:57:50	1
1892742	99	44	36,5	cyclictest	1964061	-21	latency_hist	20:20:01	1
1892739	99	44	37,5	cyclictest	2113888	-21	kworker/u8:0+flush-8:0	00:22:35	0
1892739	99	44	34,8	cyclictest	2157542	-21	ntpq	23:32:43	0
1892744	99	43	26,15	cyclictest	2084024	-21	run-parts	22:20:00	2
1892742	99	43	37,5	cyclictest	2034263	-21	kworker/u8:3+flush-8:0	22:47:45	1
1892742	99	43	37,4	cyclictest	2218574	-21	apt-get	00:37:30	1
1892742	99	43	37,4	cyclictest	2034263	-21	kworker/u8:3+events_unbound	22:57:48	1
1892742	99	43	37,4	cyclictest	1745305	-21	kworker/u8:2+flush-8:0	19:37:52	1
1892742	99	43	36,5	cyclictest	2034263	-21	kworker/u8:3+flush-8:0	22:12:47	1
1892742	99	43	36,5	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	20:32:45	1
1892742	99	43	35,6	cyclictest	2034443	-21	apt-get	21:32:30	1
1892742	99	43	29,11	cyclictest	275	-21	systemd-journal	19:25:00	1
1892742	99	42	37,3	cyclictest	2113888	-21	kworker/u8:0+events_unbound	23:12:42	1
1892742	99	42	36,4	cyclictest	572672	-21	kworker/u8:4+flush-8:0	21:12:40	1
1892742	99	42	36,4	cyclictest	572672	-21	kworker/u8:4+flush-8:0	21:12:40	1
1892742	99	42	35,5	cyclictest	2028900	-21	kworker/u8:2+events_unbound	00:32:45	1
1892742	99	42	35,5	cyclictest	2028900	-21	kworker/u8:2+events_unbound	00:32:45	1
1892739	99	42	34,6	cyclictest	2143946	-21	kworker/u8:1+flush-8:0	23:47:33	0
1892744	99	41	32,7	cyclictest	275	-21	systemd-journal	22:07:29	2
1892742	99	41	36,4	cyclictest	2113888	-21	kworker/u8:0+flush-8:0	23:57:34	1
1892742	99	41	36,3	cyclictest	2068533	-21	kworker/u8:1+flush-8:0	22:42:37	1
1892742	99	41	35,4	cyclictest	2013985	-21	latency_hist	21:10:00	1
1892742	99	41	35,4	cyclictest	2013985	-21	latency_hist	21:10:00	1
1892742	99	41	33,6	cyclictest	2028900	-21	kworker/u8:2+events_unbound	23:32:31	1
1892744	99	40	20,7	cyclictest	275	-21	systemd-journal	20:25:00	2
1892739	99	40	35,4	cyclictest	1855456	-21	kworker/u8:1+events_unbound	19:12:32	0
1892739	99	40	34,5	cyclictest	572672	-21	kworker/u8:4+events_unbound	21:12:43	0
1892739	99	40	34,5	cyclictest	572672	-21	kworker/u8:4+events_unbound	21:12:42	0
1892742	99	39	34,4	cyclictest	572672	-21	kworker/u8:4+events_unbound	19:17:45	1
1892742	99	39	34,4	cyclictest	2183018	-21	kworker/u8:3+events_unbound	00:02:48	1
1892742	99	39	33,4	cyclictest	572672	-21	kworker/u8:4+flush-8:0	20:07:38	1
1892742	99	39	33,4	cyclictest	2068533	-21	kworker/u8:1+events_unbound	22:07:32	1
1892742	99	39	33,4	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	20:37:45	1
1892742	99	38	33,4	cyclictest	2013816	-21	kworker/u8:0+events_unbound	21:22:36	1
1892742	99	38	32,5	cyclictest	2028900	-21	kworker/u8:2+events_unbound	23:47:43	1
1892742	99	38	32,5	cyclictest	1745305	-21	kworker/u8:2+flush-8:0	19:27:38	1
1892742	99	38	32,4	cyclictest	572672	-21	kworker/u8:4+flush-8:0	20:52:37	1
1892742	99	38	32,4	cyclictest	2089409	-21	apt-get	22:27:32	1
1892742	99	38	31,5	cyclictest	1913634	-21	kworker/u8:0+flush-8:0	20:12:49	1
1892742	99	38	30,6	cyclictest	2113888	-21	kworker/u8:0+flush-8:0	00:07:34	1
1892744	99	37	31,4	cyclictest	1944067	-21	apt-get	20:00:00	2
1892742	99	37	33,3	cyclictest	2183018	-21	kworker/u8:3+events_unbound	00:15:30	1
1892742	99	37	30,5	cyclictest	2138796	-21	kworker/u8:3+flush-8:0	23:17:45	1
1892739	99	37	31,4	cyclictest	275	-21	systemd-journal	20:53:28	0
1892739	99	37	29,6	cyclictest	275	-21	systemd-journal	22:45:00	0
1892739	99	37	29,6	cyclictest	2073116	-21	ntpq	22:07:45	0
1892739	99	37	29,6	cyclictest	1969026	-21	apt-get	20:25:01	0
1892739	99	37	29,6	cyclictest	1909890	-21	/usr/sbin/munin	19:27:45	0
1892742	99	36	31,4	cyclictest	2143946	-21	kworker/u8:1+events_unbound	23:37:47	1
1892742	99	36	31,4	cyclictest	2028900	-21	kworker/u8:2+events_unbound	21:52:46	1
1892742	99	36	30,4	cyclictest	2113888	-21	kworker/u8:0+flush-8:0	23:27:38	1
1892742	99	36	29,5	cyclictest	572672	-21	kworker/u8:4+flush-8:0	20:42:43	1
1892742	99	36	29,5	cyclictest	2013816	-21	kworker/u8:0+flush-8:0	22:02:36	1
1892739	99	36	27,7	cyclictest	275	-21	systemd-journal	21:00:00	0
1892456	2	36	4,9	sleep1	0	-21	swapper/1	19:08:35	1
1892744	99	35	25,8	cyclictest	275	-21	systemd-journal	20:45:00	2
1892742	99	35	28,5	cyclictest	2028900	-21	kworker/u8:2+flush-8:0	23:22:48	1
1892742	99	35	24,8	cyclictest	2177282	-21	ntpq	23:52:43	1
1892742	99	34	30,3	cyclictest	2028900	-21	kworker/u8:2+flush-8:0	21:40:36	1
1892742	99	34	28,5	cyclictest	572672	-21	kworker/u8:4+events_unbound	21:02:34	1
1892742	99	34	28,4	cyclictest	1914830	-21	apt-get	19:32:30	1
1892739	99	34	29,3	cyclictest	1913634	-21	kworker/u8:0+events_unbound	20:12:35	0
1892739	99	34	27,5	cyclictest	275	-21	systemd-journal	20:04:31	0
1892739	99	34	26,6	cyclictest	1949685	-21	apt-get	20:07:31	0
1892739	99	34	26,6	cyclictest	1919369	-21	latency_hist	19:35:01	0
1892739	99	34	1,31	cyclictest	2113677	-21	true	22:50:00	0
1892742	99	33	28,3	cyclictest	2068533	-21	kworker/u8:1+flush-8:0	22:22:40	1
1892742	99	33	26,5	cyclictest	1913634	-21	kworker/u8:0+flush-8:0	20:22:45	1
1892742	99	33	25,6	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	19:52:46	1
1892739	99	33	0,30	cyclictest	1	-21	systemd	23:12:29	0
2128202	2	32	0,2	sleep3	47	1	rcuc/3	23:02:51	3
1892742	99	32	26,4	cyclictest	2208531	-21	kworker/u8:3+flush-8:0	00:27:47	1
1892742	99	32	26,4	cyclictest	2068533	-21	kworker/u8:1+events_unbound	22:17:34	1
1892742	99	32	25,5	cyclictest	2099592	-21	cut	22:37:36	1
1892739	99	32	28,3	cyclictest	2058985	-21	cron	21:55:00	0
1892744	99	31	21,8	cyclictest	275	-21	systemd-journal	21:55:01	2
1892742	99	31	26,4	cyclictest	1929104	-21	kworker/u8:1+flush-8:0	20:57:34	1
1892742	99	31	25,4	cyclictest	2068533	-21	kworker/u8:1+flush-8:0	22:32:45	1
1892739	99	31	25,4	cyclictest	2078918	-21	cp	22:15:01	0
1892739	99	31	24,5	cyclictest	275	-21	systemd-journal	21:39:43	0
1892739	99	30	26,3	cyclictest	1929304	-21	systemd-run	19:45:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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