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 Tue Jun 02, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2770193	2	349	0,2	sleep3	47	1	rcuc/3	09:20:48	3
2889035	2	198	0,2	sleep3	47	1	rcuc/3	11:20:47	3
2798664	2	80	0,6	sleep2	0	-21	swapper/2	09:50:45	2
2831084	2	71	0,4	chrt	0	-21	swapper/1	10:25:39	1
2769071	2	67	0,4	chrt	28	1	rcuc/1	09:20:46	1
2696056	2	58	0,3	chrt	0	-21	swapper/2	08:05:55	2
2634983	99	58	49,6	cyclictest	2885400	-21	latency_hist	11:20:01	1
2634983	99	57	50,5	cyclictest	2721193	-21	kworker/u8:2+events_unbound	09:00:56	1
2634981	99	57	50,5	cyclictest	2706407	-21	apt-get	08:19:47	0
2634983	99	56	48,6	cyclictest	2634856	-21	kworker/u8:3+flush-8:0	07:45:55	1
2634983	99	54	49,4	cyclictest	2795072	-21	kworker/u8:3+flush-8:0	09:50:55	1
2634983	99	53	38,10	cyclictest	1704890	-21	systemd-journal	12:36:56	1
2634983	99	51	44,5	cyclictest	2920396	-21	kworker/u8:1+flush-8:0	12:05:49	1
2634981	99	51	43,6	cyclictest	2642063	-21	apt-get	07:15:36	0
2634983	99	50	43,5	cyclictest	2885006	-21	kworker/u8:1+events_unbound	11:35:39	1
2634983	99	50	42,6	cyclictest	2634856	-21	kworker/u8:3+events_unbound	07:15:55	1
2634983	99	50	42,5	cyclictest	2721193	-21	kworker/u8:2+flush-8:0	08:40:48	1
2634991	99	49	39,7	cyclictest	1704890	-21	systemd-journal	12:00:54	2
2634983	99	49	40,6	cyclictest	2835713	-21	kworker/u8:3+flush-8:0	10:50:50	1
2634983	99	49	37,8	cyclictest	2830770	-21	kworker/u8:1+events_unbound	11:05:36	1
2634981	99	49	39,7	cyclictest	1704890	-21	systemd-journal	10:35:41	0
2634983	99	48	41,5	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	09:55:52	1
2634983	99	48	41,5	cyclictest	2751360	-21	kworker/u8:3+flush-8:0	09:10:48	1
2634983	99	48	41,4	cyclictest	2625061	-21	kworker/u8:2+events_unbound	07:20:49	1
2634983	99	48	33,10	cyclictest	1704890	-21	systemd-journal	07:10:54	1
2634983	99	46	40,4	cyclictest	2801090	-21	kworker/u8:2+flush-8:0	10:05:41	1
2634983	99	45	40,4	cyclictest	2766236	-21	kworker/u8:0+events_unbound	10:35:48	1
2634983	99	45	40,4	cyclictest	2721193	-21	kworker/u8:2+flush-8:0	09:25:51	1
2634983	99	45	37,6	cyclictest	2766236	-21	kworker/u8:0+events_unbound	11:50:50	1
2634981	99	45	36,6	cyclictest	2691573	-21	latency_hist	08:05:01	0
2634983	99	44	38,5	cyclictest	2776358	-21	kworker/u8:1+flush-8:0	09:35:50	1
2634983	99	44	37,5	cyclictest	2865645	-21	kworker/u8:3+flush-8:0	11:25:48	1
2634983	99	44	37,5	cyclictest	2860057	-21	kworker/u8:2+flush-8:0	10:55:49	1
2634983	99	44	37,5	cyclictest	2860057	-21	kworker/u8:2+flush-8:0	10:55:48	1
2634983	99	44	36,6	cyclictest	2686878	-21	kworker/u8:1+flush-8:0	08:10:50	1
2634983	99	44	34,7	cyclictest	2944224	-21	ntpq	12:15:48	1
2634981	99	44	34,8	cyclictest	2765301	-21	ntpq	09:15:50	0
2634983	99	43	37,5	cyclictest	2903073	-21	kworker/u8:2+flush-8:0	12:00:51	1
2634983	99	43	37,5	cyclictest	2721193	-21	kworker/u8:2+flush-8:0	08:50:51	1
2634983	99	43	37,4	cyclictest	2903073	-21	kworker/u8:2+flush-8:0	12:20:39	1
2634983	99	43	37,4	cyclictest	2776358	-21	kworker/u8:1+flush-8:0	09:45:47	1
2634983	99	43	36,5	cyclictest	2696758	-21	kworker/u8:2+flush-8:0	08:15:47	1
2634983	99	43	36,5	cyclictest	2546425	-21	kworker/u8:1+flush-8:0	07:30:48	1
2634981	99	43	0,41	cyclictest	2865225	-21	munin-run	11:00:00	0
2634981	99	43	0,41	cyclictest	2865225	-21	munin-run	10:59:59	0
2634983	99	42	38,3	cyclictest	2634856	-21	kworker/u8:3+events_unbound	07:35:54	1
2634983	99	41	31,8	cyclictest	2780131	-21	ntpq	09:30:47	1
2634981	99	41	34,5	cyclictest	2870887	-21	apt-get	11:05:34	0
2634983	99	40	35,4	cyclictest	2766236	-21	kworker/u8:0+events_unbound	10:45:51	1
2634983	99	40	35,4	cyclictest	2766236	-21	kworker/u8:0+events_unbound	10:45:50	1
2634983	99	40	30,7	cyclictest	1704890	-21	systemd-journal	10:30:39	1
2634983	99	40	27,9	cyclictest	2910212	-21	apt-get	11:44:59	1
2634983	99	39	33,4	cyclictest	2666517	-21	kworker/u8:0+events_unbound	08:00:51	1
2634983	99	38	27,8	cyclictest	2715641	-21	ntpq	08:25:48	1
2634981	99	38	30,5	cyclictest	1704890	-21	systemd-journal	12:10:00	0
2634477	2	38	2,30	sleep2	0	-21	swapper/2	07:05:57	2
2634991	99	37	29,6	cyclictest	2646994	-21	gpgv	07:20:01	2
2634983	99	37	33,3	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	11:45:04	1
2634983	99	37	31,4	cyclictest	2686878	-21	kworker/u8:1+events_unbound	08:30:55	1
2634983	99	37	27,7	cyclictest	1704890	-21	systemd-journal	07:45:00	1
2634981	99	37	27,8	cyclictest	2721936	-21	diskstats	08:35:38	0
2634991	99	36	27,6	cyclictest	1704890	-21	systemd-journal	09:35:00	2
2634983	99	35	29,4	cyclictest	2810781	-21	kworker/u8:3+flush-8:0	10:15:48	1
2634983	99	35	28,5	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	10:10:48	1
2634983	99	35	28,5	cyclictest	2666517	-21	kworker/u8:0+events_unbound	07:55:54	1
2634981	99	35	30,3	cyclictest	2885407	-21	sendmail	11:20:01	0
2634981	99	35	29,4	cyclictest	2830770	-21	kworker/u8:1+flush-8:0	10:45:43	0
2634981	99	35	29,4	cyclictest	2830770	-21	kworker/u8:1+flush-8:0	10:45:43	0
2634981	99	35	27,5	cyclictest	1704890	-21	systemd-journal	09:30:26	0
2634981	99	35	23,9	cyclictest	1704890	-21	systemd-journal	10:20:00	0
2634981	99	35	2,28	cyclictest	1225164	-21	kworker/0:2+events	08:50:32	0
2634983	99	34	29,4	cyclictest	2801090	-21	kworker/u8:2+flush-8:0	10:00:45	1
2634983	99	34	29,4	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	11:55:50	1
2634983	99	34	28,5	cyclictest	2711733	-21	kworker/u8:0+events_unbound	08:45:37	1
2634983	99	34	27,5	cyclictest	2920396	-21	kworker/u8:1+flush-8:0	12:25:36	1
2634981	99	34	2,30	cyclictest	1225164	-21	kworker/0:2+events	09:14:57	0
2634981	99	34	1,27	cyclictest	1225164	-21	kworker/0:2+events	09:25:04	0
2634981	99	34	0,29	cyclictest	2935220	-21	kworker/0:2+events	12:35:05	0
2634991	99	33	27,4	cyclictest	2686220	-21	unixbench_singl	07:55:56	2
2634983	99	33	30,2	cyclictest	2666517	-21	kworker/u8:0+events_unbound	08:05:37	1
2634983	99	33	29,3	cyclictest	2721193	-21	kworker/u8:2+events_unbound	09:20:00	1
2634983	99	33	28,4	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	11:10:49	1
2634983	99	33	27,4	cyclictest	2711733	-21	kworker/u8:0+flush-8:0	09:05:51	1
2634983	99	33	27,4	cyclictest	2634856	-21	kworker/u8:3+flush-8:0	07:50:42	1
2634983	99	33	27,4	cyclictest	2634856	-21	kworker/u8:3+flush-8:0	07:50:41	1
2634981	99	33	3,25	cyclictest	1225164	-21	kworker/0:2+events	07:35:32	0
2634981	99	33	24,6	cyclictest	2920372	-21	latency_hist	11:55:01	0
2634981	99	33	2,30	cyclictest	1225164	-21	kworker/0:2+events	09:21:35	0
2634981	99	33	2,30	cyclictest	1225164	-21	kworker/0:2+events	07:48:21	0
2634981	99	33	2,29	cyclictest	1225164	-21	kworker/0:2+events	07:54:11	0
2634981	99	33	2,29	cyclictest	1225164	-21	kworker/0:2+events	07:54:10	0
2634981	99	33	2,26	cyclictest	2855278	-21	kworker/0:2+events	11:00:07	0
2634981	99	33	2,26	cyclictest	2805848	-21	kworker/0:1+events	10:40:18	0
2634983	99	32	27,4	cyclictest	2766236	-21	kworker/u8:0+flush-8:0	11:00:52	1
2634983	99	32	25,5	cyclictest	2686878	-21	kworker/u8:1+flush-8:0	08:55:55	1
2634981	99	32	27,3	cyclictest	2650961	-21	needreboot	07:20:45	0
2634981	99	32	1,30	cyclictest	2935220	-21	kworker/0:2+events	12:29:38	0
2634981	99	32	1,29	cyclictest	1225164	-21	kworker/0:2+events	08:07:11	0
2634981	99	32	0,31	cyclictest	1225164	-21	kworker/0:2+events	08:43:59	0
2634981	99	32	0,31	cyclictest	1225164	-21	kworker/0:2+events	08:12:37	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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