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 Wed Apr 22, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2594265	2	174	0,3	sleep3	48	1	ktimers/3	08:11:14	3
2712610	2	80	0,6	sleep3	0	-21	swapper/3	10:11:14	3
2530753	99	61	51,7	cyclictest	2726675	-21	kworker/u8:2+events_unbound	10:26:20	1
2746485	2	59	0,3	sleep3	75	-21	kworker/3:1+mm_percpu_wq	10:45:01	3
2530753	99	56	49,6	cyclictest	2716264	-21	kworker/u8:1+flush-8:0	10:16:25	1
2530753	99	56	49,6	cyclictest	2716264	-21	kworker/u8:1+flush-8:0	10:16:25	1
2530753	99	56	46,7	cyclictest	2652650	-21	diskstats	09:11:10	1
2530753	99	55	48,5	cyclictest	2741778	-21	kworker/u8:0+flush-8:0	10:41:25	1
2530753	99	55	48,5	cyclictest	2716264	-21	kworker/u8:1+flush-8:0	10:51:25	1
2530753	99	55	46,6	cyclictest	2597628	-21	kworker/u8:1+flush-8:0	09:16:20	1
2530753	99	54	47,5	cyclictest	2477782	-21	kworker/u8:3+events_unbound	08:11:23	1
2530753	99	54	46,6	cyclictest	2756062	-21	kworker/u8:3+flush-8:0	11:01:26	1
2530753	99	54	45,6	cyclictest	2760979	-21	kworker/u8:4+flush-8:0	12:26:19	1
2530753	99	53	47,4	cyclictest	2493695	-21	kworker/u8:0+events_unbound	07:41:20	1
2530753	99	53	46,4	cyclictest	2800912	-21	kworker/u8:1+flush-8:0	11:51:10	1
2530753	99	53	45,6	cyclictest	2821244	-21	kworker/u8:1+flush-8:0	12:21:21	1
2530753	99	53	44,6	cyclictest	2641925	-21	latency_hist	09:00:01	1
2530753	99	53	43,7	cyclictest	2726453	-21	latency_hist	10:25:00	1
2530749	99	53	44,6	cyclictest	2760979	-21	kworker/u8:4+flush-8:0	11:26:11	0
2530753	99	52	46,5	cyclictest	2641432	-21	kworker/u8:2+flush-8:0	09:01:22	1
2530753	99	52	45,5	cyclictest	2493695	-21	kworker/u8:0+flush-8:0	07:11:21	1
2530753	99	52	41,5	cyclictest	2760979	-21	kworker/u8:4+flush-8:0	11:31:11	1
2530753	99	51	44,5	cyclictest	2641432	-21	kworker/u8:2+flush-8:0	09:56:25	1
2530753	99	51	44,5	cyclictest	2617213	-21	kworker/u8:3+flush-8:0	08:46:21	1
2530757	99	50	41,6	cyclictest	2562640	-21	cat	07:40:01	2
2530753	99	50	45,4	cyclictest	2641432	-21	kworker/u8:2+events_unbound	09:26:23	1
2530753	99	50	45,3	cyclictest	2641432	-21	kworker/u8:2+events_unbound	09:36:22	1
2530753	99	50	43,5	cyclictest	2667102	-21	kworker/u8:3+flush-8:0	09:51:18	1
2530753	99	49	45,3	cyclictest	2510794	-21	kworker/u8:2+flush-8:0	07:16:27	1
2530753	99	49	44,3	cyclictest	2641432	-21	kworker/u8:2+events_unbound	09:41:25	1
2530749	99	49	39,7	cyclictest	2716537	-21	latency_hist	10:15:00	0
2530753	99	48	42,4	cyclictest	2760979	-21	kworker/u8:4+events_unbound	11:21:14	1
2530753	99	48	42,4	cyclictest	2701726	-21	kworker/u8:0+flush-8:0	10:06:20	1
2530753	99	48	42,4	cyclictest	2493695	-21	kworker/u8:0+flush-8:0	07:56:25	1
2530753	99	48	42,4	cyclictest	2493695	-21	kworker/u8:0+events_unbound	09:21:11	1
2530753	99	48	41,5	cyclictest	2493695	-21	kworker/u8:0+flush-8:0	08:21:22	1
2530749	99	48	40,5	cyclictest	280	-21	systemd-journal	07:50:00	0
2530753	99	47	43,2	cyclictest	2861212	-21	latency_hist	12:40:00	1
2530753	99	47	42,4	cyclictest	2821244	-21	kworker/u8:1+flush-8:0	12:01:22	1
2530753	99	47	42,3	cyclictest	2760979	-21	kworker/u8:4+events_unbound	12:20:00	1
2530753	99	47	42,3	cyclictest	2716264	-21	kworker/u8:1+flush-8:0	10:56:25	1
2530753	99	47	42,3	cyclictest	2716264	-21	kworker/u8:1+events_unbound	10:46:12	1
2530753	99	47	41,5	cyclictest	2667102	-21	kworker/u8:3+events_unbound	09:46:22	1
2530753	99	47	41,5	cyclictest	2493695	-21	kworker/u8:0+flush-8:0	07:51:23	1
2530753	99	47	40,4	cyclictest	2510794	-21	kworker/u8:2+events_unbound	07:36:23	1
2530753	99	47	32,11	cyclictest	280	-21	systemd-journal	11:06:10	1
2530753	99	46	40,4	cyclictest	2741778	-21	kworker/u8:0+events_unbound	12:06:20	1
2530753	99	46	39,5	cyclictest	2641432	-21	kworker/u8:2+flush-8:0	09:06:22	1
2530749	99	46	36,8	cyclictest	2705569	-21	ntpq	10:01:21	0
2530753	99	45	37,4	cyclictest	2641432	-21	kworker/u8:2+flush-8:0	09:31:22	1
2530749	99	45	36,7	cyclictest	280	-21	systemd-journal	12:00:00	0
2530757	99	44	20,21	cyclictest	2737157	-21	diskstats	10:36:11	2
2530753	99	44	41,2	cyclictest	2701726	-21	kworker/u8:0+flush-8:0	10:01:26	1
2530753	99	44	40,3	cyclictest	2477782	-21	kworker/u8:3+events_unbound	07:46:26	1
2530753	99	44	38,4	cyclictest	2760979	-21	kworker/u8:4+flush-8:0	11:26:22	1
2530753	99	44	38,4	cyclictest	2597628	-21	kworker/u8:1+flush-8:0	08:16:21	1
2530753	99	44	37,5	cyclictest	2597628	-21	kworker/u8:1+flush-8:0	08:41:22	1
2530753	99	43	38,4	cyclictest	2667102	-21	kworker/u8:3+flush-8:0	10:31:23	1
2530753	99	43	37,3	cyclictest	2760979	-21	kworker/u8:4+flush-8:0	11:46:26	1
2530753	99	43	36,5	cyclictest	2701726	-21	kworker/u8:0+flush-8:0	10:11:22	1
2530753	99	43	36,4	cyclictest	2493695	-21	kworker/u8:0+events_unbound	07:31:17	1
2530749	99	43	34,7	cyclictest	2556399	-21	ntpq	07:31:22	0
2595271	2	42	0,1	sleep0	0	-21	swapper/0	08:11:16	0
2530757	99	42	21,6	cyclictest	280	-21	systemd-journal	07:44:59	2
2530753	99	42	35,5	cyclictest	2726675	-21	kworker/u8:2+flush-8:0	10:36:21	1
2530753	99	41	37,3	cyclictest	2617213	-21	kworker/u8:3+events_unbound	08:51:23	1
2530753	99	41	37,3	cyclictest	2477782	-21	kworker/u8:3+flush-8:0	08:06:27	1
2530753	99	41	37,3	cyclictest	2477782	-21	kworker/u8:3+flush-8:0	08:06:26	1
2530749	99	41	34,4	cyclictest	2756325	-21	latency_hist	10:55:01	0
2530753	99	40	35,3	cyclictest	2493695	-21	kworker/u8:0+flush-8:0	08:31:26	1
2530753	99	40	34,4	cyclictest	2760979	-21	kworker/u8:4+events_unbound	11:36:23	1
2530753	99	40	31,6	cyclictest	280	-21	systemd-journal	08:26:10	1
2530749	99	40	1,36	cyclictest	2572513	-21	munin-run	07:50:00	0
2530757	99	39	33,4	cyclictest	2731382	-21	apt-get	10:30:01	2
2530753	99	39	34,3	cyclictest	2760979	-21	kworker/u8:4+events_unbound	11:15:01	1
2530749	99	39	32,5	cyclictest	2662378	-21	grep	09:21:10	0
2530749	99	39	30,6	cyclictest	2641066	-21	ntpq	08:56:20	0
2530757	99	38	18,3	cyclictest	2731979	-21	aten2_r5power_c	10:31:09	2
2530757	99	38	17,8	cyclictest	2825934	-21	apt-get	12:05:00	2
2530749	99	38	29,7	cyclictest	2657314	-21	apt-get	09:16:06	0
2530749	99	38	29,6	cyclictest	2781167	-21	latency_hist	11:20:01	0
2530757	99	37	19,2	cyclictest	0	-21	swapper/2	12:00:00	2
2530753	99	37	31,5	cyclictest	2760979	-21	kworker/u8:4+events_unbound	12:11:21	1
2530757	99	36	20,13	cyclictest	2617550	-21	aten2_r5power_c	08:36:10	2
2530757	99	36	18,3	cyclictest	0	-21	swapper/2	12:30:00	2
2530757	99	36	0,12	cyclictest	2860622	-21	python3	12:36:25	2
2530757	99	35	26,7	cyclictest	280	-21	systemd-journal	12:16:11	2
2530757	99	35	25,8	cyclictest	2602374	-21	awk	08:20:00	2
2530753	99	35	23,9	cyclictest	2856256	-21	turbostat.cron	12:35:00	1
2530753	99	34	29,4	cyclictest	2741778	-21	kworker/u8:0+events_unbound	11:41:15	1
2530753	99	34	28,4	cyclictest	2552328	-21	cron	07:30:00	1
2530749	99	34	26,6	cyclictest	280	-21	systemd-journal	10:06:11	0
2530499	2	34	3,6	sleep1	0	-21	swapper/1	07:09:14	1
2530757	99	33	17,3	cyclictest	2661946	-21	turbostat.cron	09:20:00	2
2530753	99	33	29,3	cyclictest	2741778	-21	kworker/u8:0+flush-8:0	11:56:26	1
2530749	99	33	25,6	cyclictest	2760926	-21	unixbench_multi	10:56:26	0
2530757	99	32	17,3	cyclictest	2742213	-21	fschecks_time	10:41:11	2
2530757	99	32	10,7	cyclictest	2716535	-21	cat	10:15:00	2
2530753	99	32	27,3	cyclictest	2618240	-21	irqrtprio	08:36:16	1
2530749	99	32	27,3	cyclictest	2623217	-21	irqrtprio	08:41:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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