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 May 01, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3016251	2	351	0,6	sleep3	45	1	irq_work/3	21:21:14	3
3016251	2	351	0,6	sleep3	45	1	irq_work/3	21:21:14	3
3126586	2	73	0,3	chrt	20	1	rcuc/0	23:11:14	0
3126586	2	73	0,3	chrt	20	1	rcuc/0	23:11:14	0
3014772	2	60	0,1	sleep0	3014774	-21	cat	21:21:11	0
3014772	2	60	0,1	sleep0	3014774	-21	cat	21:21:11	0
2882579	99	57	49,6	cyclictest	280	-21	systemd-journal	22:00:01	0
2882579	99	56	51,3	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	23:00:00	0
2882579	99	53	46,5	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	00:06:17	0
2882579	99	53	46,5	cyclictest	2908916	-21	kworker/u8:3+events_unbound	20:01:18	0
2882584	99	52	45,5	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	20:26:05	1
2882579	99	52	47,4	cyclictest	2908916	-21	kworker/u8:3+events_unbound	21:01:18	0
2882579	99	52	46,4	cyclictest	2894995	-21	kworker/u8:0+events_unbound	19:35:00	0
2882579	99	52	46,4	cyclictest	2894995	-21	kworker/u8:0+events_unbound	19:35:00	0
2882584	99	51	45,5	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	20:46:05	1
2882584	99	51	44,5	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	20:16:17	1
2882584	99	50	45,3	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	21:11:06	1
2882579	99	50	45,3	cyclictest	3183365	-21	kworker/u8:2+flush-8:0	00:16:18	0
2882579	99	49	44,4	cyclictest	3147496	-21	kworker/u8:0+flush-8:0	00:01:16	0
2882579	99	48	44,3	cyclictest	3083607	-21	kworker/u8:2+events_unbound	22:46:18	0
2882579	99	48	42,4	cyclictest	3032904	-21	kworker/u8:0+flush-8:0	21:51:13	0
2882579	99	48	41,5	cyclictest	3157435	-21	kworker/u8:1+flush-8:0	23:46:17	0
2882584	99	47	40,5	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	20:11:04	1
2882584	99	47	39,5	cyclictest	280	-21	systemd-journal	22:03:27	1
2882584	99	47	36,8	cyclictest	3132137	-21	ntpq	23:16:17	1
2882579	99	47	41,4	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	23:10:01	0
2882584	99	46	34,9	cyclictest	280	-21	systemd-journal	00:35:00	1
2882579	99	46	42,3	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	20:46:17	0
2882579	99	46	40,4	cyclictest	3122546	-21	kworker/u8:1+flush-8:0	23:21:19	0
2882579	99	46	39,5	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	23:51:16	0
2882584	99	45	39,5	cyclictest	3058375	-21	kworker/u8:2+flush-8:0	22:11:07	1
2882584	99	45	33,9	cyclictest	280	-21	systemd-journal	19:30:00	1
2882584	99	45	33,9	cyclictest	280	-21	systemd-journal	19:30:00	1
2882579	99	45	40,4	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	23:16:15	0
2882579	99	45	40,3	cyclictest	3122546	-21	kworker/u8:1+flush-8:0	23:31:12	0
2882579	99	45	39,4	cyclictest	3013632	-21	kworker/u8:2+flush-8:0	21:41:20	0
2882579	99	45	38,5	cyclictest	3058375	-21	kworker/u8:2+flush-8:0	22:11:17	0
2882579	99	45	32,10	cyclictest	2999429	-21	diskstats	21:06:06	0
2882588	99	44	32,9	cyclictest	2914300	-21	awk	19:40:00	2
2882584	99	44	40,3	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	19:51:19	1
2882584	99	44	39,4	cyclictest	3147496	-21	kworker/u8:0+flush-8:0	00:36:07	1
2882584	99	44	36,6	cyclictest	3137895	-21	latency_hist	23:25:01	1
2882584	99	44	33,9	cyclictest	3188394	-21	/usr/sbin/munin	00:21:14	1
2882584	99	44	32,9	cyclictest	3042755	-21	ntpq	21:46:13	1
2882584	99	44	31,10	cyclictest	2973217	-21	ntpq	20:36:15	1
2882579	99	43	39,3	cyclictest	3083607	-21	kworker/u8:2+events_unbound	22:41:19	0
2882579	99	43	38,4	cyclictest	3083607	-21	kworker/u8:2+flush-8:0	22:51:12	0
2882579	99	43	38,4	cyclictest	2780337	-21	kworker/u8:2+flush-8:0	19:26:14	0
2882579	99	43	38,4	cyclictest	2780337	-21	kworker/u8:2+flush-8:0	19:26:14	0
2882579	99	43	38,3	cyclictest	3137624	-21	kworker/u8:2+flush-8:0	23:41:15	0
2882579	99	43	36,5	cyclictest	2889489	-21	kworker/u8:3+flush-8:0	19:16:15	0
2882579	99	43	35,5	cyclictest	2974103	-21	latency_hist	20:40:01	0
2882584	99	42	34,6	cyclictest	3032904	-21	kworker/u8:0+events_unbound	21:51:17	1
2882579	99	42	37,4	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	20:21:16	0
2882579	99	42	36,4	cyclictest	2964465	-21	kworker/u8:1+events_unbound	20:51:13	0
2882579	99	42	35,5	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	19:41:14	0
2882579	99	41	37,3	cyclictest	3013632	-21	kworker/u8:2+events_unbound	21:26:17	0
2882579	99	41	36,3	cyclictest	2894995	-21	kworker/u8:0+events_unbound	19:36:14	0
2882579	99	41	36,3	cyclictest	2041271	-21	kworker/u8:1+events_unbound	19:21:21	0
2882579	99	41	35,4	cyclictest	3032904	-21	kworker/u8:0+events_unbound	22:16:16	0
2882579	99	40	33,5	cyclictest	3157435	-21	kworker/u8:1+flush-8:0	00:31:17	0
2882588	99	39	30,7	cyclictest	280	-21	systemd-journal	19:15:00	2
2882584	99	39	34,4	cyclictest	3147496	-21	kworker/u8:0+flush-8:0	23:36:20	1
2882584	99	39	32,5	cyclictest	3083607	-21	kworker/u8:2+flush-8:0	22:36:15	1
2882579	99	39	33,4	cyclictest	2908916	-21	kworker/u8:3+events_unbound	23:01:09	0
2882579	99	39	30,7	cyclictest	3062615	-21	ntpq	22:06:14	0
2882579	99	39	1,36	cyclictest	1	-21	systemd	20:00:01	0
2966727	2	38	0,6	sleep3	45	1	irq_work/3	20:31:10	3
2882584	99	38	32,5	cyclictest	3058375	-21	kworker/u8:2+flush-8:0	22:06:16	1
2882584	99	38	28,7	cyclictest	280	-21	systemd-journal	23:54:59	1
2882579	99	38	32,4	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	21:11:16	0
2882579	99	38	32,4	cyclictest	2894995	-21	kworker/u8:0+events_unbound	19:46:06	0
2882579	99	38	30,5	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	21:36:15	0
2882584	99	37	33,3	cyclictest	2964465	-21	kworker/u8:1+flush-8:0	20:41:04	1
2882584	99	37	33,3	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	19:36:05	1
2882584	99	37	32,3	cyclictest	2894995	-21	kworker/u8:0+flush-8:0	19:45:00	1
2882584	99	37	31,4	cyclictest	3032904	-21	kworker/u8:0+flush-8:0	22:31:07	1
2882579	99	37	33,2	cyclictest	2908916	-21	kworker/u8:3+events_unbound	20:26:14	0
2882579	99	37	31,4	cyclictest	2908916	-21	kworker/u8:3+events_unbound	20:11:15	0
2882579	99	37	25,9	cyclictest	3082433	-21	ntpq	22:26:13	0
2882579	99	37	24,10	cyclictest	280	-21	systemd-journal	23:30:01	0
2882584	99	36	31,3	cyclictest	3032904	-21	kworker/u8:0+events_unbound	22:16:07	1
2882579	99	36	31,4	cyclictest	3032904	-21	kworker/u8:0+events_unbound	22:21:16	0
2882579	99	36	28,6	cyclictest	2894995	-21	kworker/u8:0+events_unbound	21:16:00	0
2882579	99	35	31,3	cyclictest	3032904	-21	kworker/u8:0+events_unbound	22:01:18	0
2882579	99	35	31,3	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	20:31:07	0
2882584	99	34	30,3	cyclictest	3122546	-21	kworker/u8:1+events_unbound	23:31:17	1
2882584	99	34	30,3	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	21:06:21	1
2882584	99	34	28,4	cyclictest	2908916	-21	kworker/u8:3+flush-8:0	21:31:11	1
2882584	99	34	28,4	cyclictest	2041271	-21	kworker/u8:1+flush-8:0	19:21:06	1
2882584	99	34	24,7	cyclictest	2954635	-21	/usr/sbin/munin	20:21:13	1
2882579	99	34	25,7	cyclictest	2928489	-21	ntpq	19:51:15	0
2882579	99	34	24,8	cyclictest	3151849	-21	ntpq	23:36:14	0
2882588	99	33	27,4	cyclictest	3013632	-21	kworker/u8:2+flush-8:0	21:31:17	2
2882584	99	33	27,4	cyclictest	2994221	-21	apt-get	21:01:01	1
2882584	99	33	26,5	cyclictest	3083607	-21	kworker/u8:2+events_unbound	22:46:08	1
2882584	99	33	25,6	cyclictest	3183457	-21	apt-get	00:15:57	1
2882584	99	33	25,6	cyclictest	3147496	-21	kworker/u8:0+events_unbound	00:01:19	1
2882579	99	33	29,3	cyclictest	2863033	-21	kworker/u8:0+flush-8:0	19:11:20	0
2882579	99	33	26,5	cyclictest	3157435	-21	kworker/u8:1+flush-8:0	00:26:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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