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 Sun May 24, 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
2770149	2	202	0,6	sleep3	0	-21	swapper/3	22:15:52	3
2626990	2	201	0,3	sleep3	75	-21	kworker/3:1+events	19:50:54	3
2626990	2	201	0,3	sleep3	75	-21	kworker/3:1+events	19:50:54	3
2582435	99	78	68,7	cyclictest	2713672	-21	latency_hist	21:20:01	0
2582435	99	78	68,7	cyclictest	2713672	-21	latency_hist	21:20:01	0
2582435	99	69	63,5	cyclictest	2787999	-21	kworker/u8:3+flush-8:0	00:01:03	0
2582435	99	66	61,4	cyclictest	2862521	-21	kworker/u8:2+flush-8:0	00:26:03	0
2582435	99	64	59,4	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	21:26:01	0
2582435	99	64	58,4	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	21:21:01	0
2582437	99	63	51,9	cyclictest	2851831	-21	ntpq	23:36:02	1
2582435	99	63	58,4	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	20:36:00	0
2582435	99	62	56,4	cyclictest	2589445	-21	kworker/u8:1+events_unbound	19:15:46	0
2582435	99	61	57,3	cyclictest	2842889	-21	kworker/u8:0+flush-8:0	23:46:02	0
2582435	99	61	57,3	cyclictest	2787999	-21	kworker/u8:3+flush-8:0	22:36:02	0
2582435	99	60	56,3	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	19:56:02	0
2582435	99	60	54,4	cyclictest	2638403	-21	kworker/u8:1+events_unbound	22:20:00	0
2582435	99	59	55,3	cyclictest	2892537	-21	kworker/u8:1+events_unbound	00:21:03	0
2582435	99	59	55,3	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	21:01:01	0
2582435	99	58	54,3	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	20:16:00	0
2582435	99	58	53,3	cyclictest	2638403	-21	kworker/u8:1+events_unbound	21:30:51	0
2582435	99	57	52,4	cyclictest	2787999	-21	kworker/u8:3+events_unbound	00:00:01	0
2582435	99	57	52,3	cyclictest	2638403	-21	kworker/u8:1+events_unbound	21:10:47	0
2582435	99	57	51,4	cyclictest	2638403	-21	kworker/u8:1+events_unbound	21:45:46	0
2582435	99	57	51,4	cyclictest	2618556	-21	kworker/u8:2+events_unbound	19:51:00	0
2582435	99	57	51,4	cyclictest	2618556	-21	kworker/u8:2+events_unbound	19:51:00	0
2582435	99	57	51,4	cyclictest	2589445	-21	kworker/u8:1+events_unbound	19:25:46	0
2582437	99	56	48,6	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	21:16:02	1
2582437	99	56	48,6	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	21:16:02	1
2582435	99	56	52,3	cyclictest	2534903	-21	kworker/u8:3+events_unbound	19:20:45	0
2582435	99	56	50,4	cyclictest	2693654	-21	kworker/u8:0+events_unbound	21:40:59	0
2582435	99	56	49,5	cyclictest	2787999	-21	kworker/u8:3+events_unbound	23:06:00	0
2582435	99	56	47,7	cyclictest	2744085	-21	diskstats	21:50:50	0
2582437	99	55	45,7	cyclictest	2813004	-21	latency_hist	23:00:01	1
2582435	99	55	51,3	cyclictest	2770957	-21	kworker/u8:2+flush-8:0	23:26:01	0
2582435	99	55	50,4	cyclictest	2693654	-21	kworker/u8:0+events_unbound	22:06:03	0
2582435	99	55	49,4	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	20:20:46	0
2582435	99	55	49,4	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:30:02	0
2582437	99	54	44,8	cyclictest	2598205	-21	ntpq	19:20:56	1
2582435	99	54	50,3	cyclictest	2770957	-21	kworker/u8:2+events_unbound	22:41:01	0
2582435	99	54	48,4	cyclictest	2534903	-21	kworker/u8:3+events_unbound	19:36:00	0
2582435	99	54	47,5	cyclictest	2649273	-21	kworker/u8:2+events_unbound	20:26:01	0
2582435	99	54	44,7	cyclictest	2678560	-21	latency_hist	20:45:01	0
2582437	99	53	47,5	cyclictest	2534903	-21	kworker/u8:3+flush-8:0	19:40:47	1
2582435	99	53	49,3	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:06:03	0
2582435	99	53	48,4	cyclictest	2787999	-21	kworker/u8:3+flush-8:0	23:20:47	0
2582435	99	53	47,4	cyclictest	2872692	-21	kworker/u8:5+events_unbound	00:06:00	0
2582437	99	52	42,8	cyclictest	2632819	-21	ntpq	19:55:57	1
2582435	99	52	48,3	cyclictest	2770957	-21	kworker/u8:2+events_unbound	22:51:04	0
2582435	99	52	46,4	cyclictest	2842889	-21	kworker/u8:0+events_unbound	23:35:48	0
2582435	99	52	46,4	cyclictest	2628451	-21	kworker/u8:3+events_unbound	20:00:46	0
2582437	99	51	47,3	cyclictest	2673614	-21	kworker/u8:2+events_unbound	20:40:01	1
2582437	99	50	46,3	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	22:45:55	1
2582435	99	50	46,3	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	22:26:03	0
2582435	99	50	44,4	cyclictest	2628451	-21	kworker/u8:3+events_unbound	20:50:01	0
2582435	99	50	44,3	cyclictest	2693654	-21	kworker/u8:0+events_unbound	21:35:56	0
2582437	99	49	43,4	cyclictest	2708722	-21	kworker/u8:3+events_unbound	21:55:01	1
2582437	99	49	42,5	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:55:56	1
2582437	99	49	39,8	cyclictest	2911405	-21	ntpq	00:35:57	1
2582435	99	49	45,3	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	22:20:57	0
2582435	99	49	44,4	cyclictest	2534903	-21	kworker/u8:3+events_unbound	19:30:45	0
2582435	99	49	43,5	cyclictest	2770957	-21	kworker/u8:2+events_unbound	23:15:59	0
2582437	99	48	41,5	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	20:50:48	1
2582435	99	48	43,3	cyclictest	2842889	-21	kworker/u8:0+events_unbound	23:50:57	0
2582435	99	48	42,4	cyclictest	2589445	-21	kworker/u8:1+events_unbound	19:45:58	0
2582437	99	47	41,5	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:30:58	1
2582437	99	47	41,4	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	22:20:49	1
2582437	99	47	38,7	cyclictest	2862521	-21	kworker/u8:2+flush-8:0	00:15:58	1
2582435	99	47	43,3	cyclictest	2842889	-21	kworker/u8:0+events_unbound	23:31:00	0
2582435	99	47	43,3	cyclictest	2787999	-21	kworker/u8:3+flush-8:0	23:11:01	0
2582437	99	46	41,4	cyclictest	2708722	-21	kworker/u8:3+flush-8:0	21:55:46	1
2582437	99	46	37,6	cyclictest	1704890	-21	systemd-journal	23:56:36	1
2582435	99	46	42,3	cyclictest	2892537	-21	kworker/u8:1+events_unbound	00:36:00	0
2582435	99	46	41,3	cyclictest	2534903	-21	kworker/u8:3+events_unbound	19:40:51	0
2582435	99	46	38,6	cyclictest	2906496	-21	ntpq	00:30:57	0
2582437	99	45	35,5	cyclictest	2842889	-21	kworker/u8:0+flush-8:0	23:41:02	1
2582437	99	45	35,5	cyclictest	2842889	-21	kworker/u8:0+flush-8:0	23:41:02	1
2582435	99	45	41,3	cyclictest	2693654	-21	kworker/u8:0+events_unbound	22:11:03	0
2582435	99	45	39,3	cyclictest	2693654	-21	kworker/u8:0+events_unbound	22:30:43	0
2582435	99	45	35,7	cyclictest	2798504	-21	/usr/sbin/munin	22:45:54	0
2582437	99	44	38,4	cyclictest	2649273	-21	kworker/u8:2+flush-8:0	20:21:02	1
2582435	99	44	40,3	cyclictest	2787999	-21	kworker/u8:3+events_unbound	22:55:46	0
2582435	99	44	40,3	cyclictest	2638403	-21	kworker/u8:1+events_unbound	20:50:59	0
2582435	99	44	40,3	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:56:02	0
2582437	99	43	38,3	cyclictest	2787999	-21	kworker/u8:3+events_unbound	23:20:49	1
2582437	99	42	37,3	cyclictest	2693654	-21	kworker/u8:0+events_unbound	21:45:50	1
2582437	99	42	36,5	cyclictest	2770957	-21	kworker/u8:2+flush-8:0	23:00:51	1
2582435	99	42	38,3	cyclictest	2842889	-21	kworker/u8:0+events_unbound	23:41:03	0
2582435	99	42	38,3	cyclictest	2842889	-21	kworker/u8:0+events_unbound	23:41:02	0
2708138	2	41	0,6	sleep3	0	-21	swapper/3	21:11:03	3
2582437	99	41	36,4	cyclictest	2628451	-21	kworker/u8:3+flush-8:0	20:00:49	1
2582437	99	41	35,5	cyclictest	2770957	-21	kworker/u8:2+flush-8:0	22:40:58	1
2582437	99	41	35,4	cyclictest	1511211	-21	kworker/u8:2+events_unbound	19:15:01	1
2582437	99	41	34,6	cyclictest	2693654	-21	kworker/u8:0+flush-8:0	22:00:47	1
2582435	99	41	37,3	cyclictest	2872692	-21	kworker/u8:5+flush-8:0	00:10:48	0
2582435	99	41	35,4	cyclictest	2693654	-21	kworker/u8:0+events_unbound	22:00:57	0
2582437	99	40	35,3	cyclictest	2698603	-21	apt-get	21:05:03	1
2582437	99	40	34,4	cyclictest	2638403	-21	kworker/u8:1+flush-8:0	21:30:49	1
2582437	99	40	30,8	cyclictest	2737504	-21	ntpq	21:40:56	1
2582049	2	40	4,11	sleep1	0	-21	swapper/1	19:07:35	1
2582437	99	39	29,7	cyclictest	2828131	-21	/usr/sbin/munin	23:16:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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