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
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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 Apr 21, 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
2878958	2	85	0,3	sleep2	0	-21	swapper/2	09:46:15	2
2816333	2	65	0,2	chrt	45	1	irq_work/3	08:41:19	3
2721688	99	64	54,8	cyclictest	3042110	-21	cp	12:30:00	2
2721680	99	62	57,3	cyclictest	2788507	-21	kworker/u8:2+events_unbound	08:20:01	0
2721680	99	62	55,5	cyclictest	2778440	-21	kworker/u8:1+events_unbound	09:11:24	0
2721680	99	61	55,4	cyclictest	2837950	-21	kworker/u8:0+events_unbound	09:21:24	0
2721680	99	60	55,3	cyclictest	2721400	-21	kworker/u8:3+events_unbound	07:15:06	0
2721680	99	57	50,5	cyclictest	2932558	-21	kworker/u8:3+events_unbound	11:11:27	0
2721680	99	57	50,5	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	09:26:25	0
2721680	99	56	49,5	cyclictest	3017342	-21	kworker/u8:1+events_unbound	12:26:24	0
2721682	99	55	43,9	cyclictest	280	-21	systemd-journal	07:36:11	1
2721680	99	54	50,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	08:46:26	0
2721680	99	54	49,3	cyclictest	2932558	-21	kworker/u8:3+events_unbound	10:41:30	0
2721680	99	54	48,4	cyclictest	2978024	-21	kworker/u8:2+flush-8:0	11:26:27	0
2721680	99	54	44,4	cyclictest	2669179	-21	kworker/u8:0+events_unbound	08:11:24	0
2721680	99	53	44,7	cyclictest	3047068	-21	latency_hist	12:35:01	0
2721680	99	52	48,3	cyclictest	3027255	-21	kworker/u8:3+events_unbound	12:20:01	0
2721680	99	52	46,4	cyclictest	2778440	-21	kworker/u8:1+events_unbound	08:56:10	0
2721680	99	52	41,8	cyclictest	2747535	-21	ntpq	07:31:20	0
2721680	99	51	47,3	cyclictest	2837950	-21	kworker/u8:0+flush-8:0	10:31:27	0
2721680	99	51	46,4	cyclictest	2837950	-21	kworker/u8:0+events_unbound	10:01:12	0
2721680	99	51	46,4	cyclictest	2669179	-21	kworker/u8:0+flush-8:0	07:26:25	0
2721680	99	51	46,3	cyclictest	2987146	-21	kworker/u8:0+events_unbound	11:56:12	0
2721680	99	51	46,3	cyclictest	2778440	-21	kworker/u8:1+events_unbound	09:56:20	0
2721680	99	51	45,4	cyclictest	2902872	-21	kworker/u8:2+events_unbound	10:46:16	0
2721680	99	51	35,11	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	09:46:07	0
2721682	99	50	38,9	cyclictest	280	-21	systemd-journal	08:41:11	1
2721680	99	50	46,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	11:46:11	0
2721680	99	50	46,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	11:46:11	0
2721680	99	50	46,3	cyclictest	2748433	-21	kworker/u8:1+flush-8:0	07:46:28	0
2721680	99	50	45,4	cyclictest	2721400	-21	kworker/u8:3+flush-8:0	07:11:28	0
2721680	99	50	44,5	cyclictest	2669179	-21	kworker/u8:0+events_unbound	07:36:20	0
2721680	99	50	43,5	cyclictest	2748433	-21	kworker/u8:1+events_unbound	07:51:24	0
2721688	99	49	40,7	cyclictest	2962098	-21	cp	11:10:00	2
2721680	99	49	45,3	cyclictest	2758418	-21	kworker/u8:3+flush-8:0	09:01:28	0
2721680	99	49	44,3	cyclictest	2778440	-21	kworker/u8:1+events_unbound	08:41:13	0
2721680	99	49	43,4	cyclictest	2778440	-21	kworker/u8:1+events_unbound	09:06:23	0
2721680	99	48	44,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	09:36:25	0
2721680	99	48	42,4	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	10:21:21	0
2721680	99	47	43,2	cyclictest	2837950	-21	kworker/u8:0+events_unbound	09:51:24	0
2721680	99	47	40,5	cyclictest	2837950	-21	kworker/u8:0+events_unbound	10:06:21	0
2721682	99	46	38,6	cyclictest	2669179	-21	kworker/u8:0+flush-8:0	07:26:26	1
2721680	99	46	42,3	cyclictest	2778440	-21	kworker/u8:1+events_unbound	09:16:11	0
2721680	99	46	42,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	08:06:25	0
2721680	99	46	40,3	cyclictest	2669179	-21	kworker/u8:0+events_unbound	07:41:26	0
2721680	99	46	39,5	cyclictest	2788507	-21	kworker/u8:2+events_unbound	08:21:12	0
2721680	99	45	41,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	11:16:28	0
2721680	99	45	39,4	cyclictest	2917796	-21	apt-get	10:26:08	0
2721680	99	44	40,3	cyclictest	3027255	-21	kworker/u8:3+events_unbound	12:36:25	0
2721680	99	44	40,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	09:41:13	0
2721139	2	44	28,10	sleep1	0	-21	swapper/1	07:07:16	1
2721682	99	43	38,4	cyclictest	2932558	-21	kworker/u8:3+flush-8:0	10:41:17	1
2721680	99	43	39,3	cyclictest	2758418	-21	kworker/u8:3+flush-8:0	08:31:24	0
2721680	99	43	39,3	cyclictest	2758418	-21	kworker/u8:3+flush-8:0	08:01:26	0
2721680	99	43	37,4	cyclictest	2932558	-21	kworker/u8:3+events_unbound	11:21:21	0
2721682	99	42	33,6	cyclictest	2977100	-21	latency_hist	11:25:01	1
2721680	99	42	38,3	cyclictest	3017342	-21	kworker/u8:1+events_unbound	12:06:24	0
2721680	99	42	38,3	cyclictest	2902872	-21	kworker/u8:2+flush-8:0	10:56:13	0
2721680	99	42	37,3	cyclictest	2778440	-21	kworker/u8:1+events_unbound	09:31:17	0
2721680	99	42	37,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	08:36:28	0
2721680	99	41	37,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	08:26:12	0
2721680	99	41	35,4	cyclictest	2932558	-21	kworker/u8:3+events_unbound	12:01:19	0
2721680	99	41	35,4	cyclictest	2932558	-21	kworker/u8:3+events_unbound	11:41:23	0
2721680	99	41	35,4	cyclictest	2932558	-21	kworker/u8:3+events_unbound	11:41:23	0
2721680	99	41	35,4	cyclictest	2669179	-21	kworker/u8:0+events_unbound	07:21:22	0
2721680	99	40	36,3	cyclictest	2902872	-21	kworker/u8:2+events_unbound	10:36:13	0
2721680	99	40	35,4	cyclictest	2902872	-21	kworker/u8:2+events_unbound	11:01:27	0
2721680	99	40	33,5	cyclictest	2837950	-21	kworker/u8:0+events_unbound	10:11:08	0
2721682	99	39	29,8	cyclictest	2866725	-21	ntpq	09:31:20	1
2721682	99	39	28,8	cyclictest	2927354	-21	latency_hist	10:35:01	1
2721680	99	39	35,3	cyclictest	3006997	-21	kworker/u8:2+flush-8:0	12:11:26	0
2721680	99	39	35,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	11:51:23	0
2721680	99	39	35,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	08:51:21	0
2721680	99	39	35,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	08:51:21	0
2721680	99	39	33,4	cyclictest	2837950	-21	kworker/u8:0+events_unbound	10:16:09	0
2721680	99	39	29,7	cyclictest	2961151	-21	ntpq	11:06:21	0
2716767	2	39	3,6	sleep0	0	-21	swapper/0	07:05:42	0
2721680	99	38	34,3	cyclictest	2902872	-21	kworker/u8:2+events_unbound	10:51:16	0
2721682	99	37	29,6	cyclictest	3006977	-21	latency_hist	11:54:59	1
2721680	99	37	32,3	cyclictest	2758418	-21	kworker/u8:3+events_unbound	07:56:15	0
2721680	99	37	30,5	cyclictest	3027255	-21	kworker/u8:3+events_unbound	12:21:08	0
2721680	99	36	32,3	cyclictest	2778440	-21	kworker/u8:1+flush-8:0	11:36:12	0
2721682	99	35	26,7	cyclictest	2982612	-21	/usr/sbin/munin	11:31:21	1
2721682	99	34	29,3	cyclictest	2728848	-21	kworker/u8:2+flush-8:0	07:20:01	1
2721682	99	34	26,6	cyclictest	2793595	-21	apt-get	08:21:08	1
2721682	99	34	26,5	cyclictest	280	-21	systemd-journal	10:48:11	1
2721680	99	34	30,2	cyclictest	2978024	-21	kworker/u8:2+events_unbound	11:31:17	0
2721688	99	33	27,4	cyclictest	2977377	-21	gpgv	11:25:01	2
2721682	99	33	28,3	cyclictest	2917464	-21	idleruntime-cro	10:25:00	1
2721682	99	33	27,4	cyclictest	2967529	-21	apt-get	11:16:08	1
2721682	99	33	27,4	cyclictest	280	-21	systemd-journal	09:53:11	1
2721682	99	33	27,4	cyclictest	280	-21	systemd-journal	09:24:12	1
2721682	99	33	26,5	cyclictest	280	-21	systemd-journal	08:04:10	1
2721688	99	32	26,4	cyclictest	2936957	-21	unixbench_singl	10:41:31	2
2721682	99	32	25,5	cyclictest	280	-21	systemd-journal	12:16:11	1
2721682	99	32	23,6	cyclictest	280	-21	systemd-journal	07:10:03	1
2721688	99	31	21,8	cyclictest	280	-21	systemd-journal	08:35:00	2
2721688	99	30	21,6	cyclictest	2942334	-21	latency_hist	10:50:01	2
2721682	99	30	26,3	cyclictest	2748433	-21	kworker/u8:1+flush-8:0	07:51:13	1
2721682	99	30	26,2	cyclictest	2902872	-21	kworker/u8:2+events_unbound	10:26:17	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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