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 Jul 05, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2142347	2	175	0,3	sleep3	75	-21	kworker/3:1+events	21:10:16	3
2305449	2	89	0,1	chrt	2305453	-21	fschecks_count	23:55:12	1
2076649	2	85	0,3	chrt	75	-21	kworker/3:1+events	20:05:10	3
2092166	2	74	0,5	chrt	0	-21	swapper/3	20:20:15	3
2019302	99	68	64,3	cyclictest	2106335	-21	kworker/u8:2+events_unbound	21:10:30	2
2236097	2	62	0,2	sleep3	75	-21	kworker/3:1+mm_percpu_wq	22:45:14	3
2029259	2	61	0,2	sleep3	45	1	irq_work/3	19:15:18	3
2097113	2	60	0,6	sleep2	0	-21	swapper/2	20:25:15	2
2019294	99	57	47,8	cyclictest	2030077	-21	ntpq	19:15:20	0
2019294	99	56	48,6	cyclictest	2175568	-21	latency_hist	21:45:02	0
2019294	99	55	51,3	cyclictest	1963411	-21	kworker/u8:0+flush-8:0	19:25:25	0
2019297	99	53	44,6	cyclictest	2319772	-21	latency_hist	00:10:00	1
2019294	99	53	47,4	cyclictest	2300195	-21	kworker/u8:0+flush-8:0	00:20:27	0
2019294	99	53	47,4	cyclictest	2300195	-21	kworker/u8:0+flush-8:0	00:20:27	0
2019294	99	53	42,8	cyclictest	2120041	-21	ntpq	20:45:21	0
2019297	99	52	47,4	cyclictest	2195268	-21	kworker/u8:2+events_unbound	00:25:26	1
2019297	99	52	46,4	cyclictest	2045806	-21	kworker/u8:1+events_unbound	20:10:25	1
2019294	99	52	41,9	cyclictest	2274240	-21	ntpq	23:20:22	0
2019297	99	51	41,8	cyclictest	2190430	-21	latency_hist	22:00:01	1
2019294	99	51	46,4	cyclictest	674386	-21	kworker/u8:2+events_unbound	20:05:14	0
2019294	99	51	45,4	cyclictest	674386	-21	kworker/u8:2+flush-8:0	19:45:12	0
2019294	99	51	42,6	cyclictest	2145733	-21	latency_hist	21:15:00	0
2019297	99	49	44,4	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	21:20:31	1
2019294	99	49	44,4	cyclictest	2045806	-21	kworker/u8:1+flush-8:0	21:00:31	0
2019294	99	49	43,4	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	21:30:26	0
2019294	99	49	43,4	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	21:30:25	0
2019294	99	49	38,9	cyclictest	2179566	-21	ntpq	21:45:22	0
2019297	99	47	37,7	cyclictest	2205528	-21	latency_hist	22:15:01	1
2019294	99	47	42,4	cyclictest	2081493	-21	kworker/u8:0+flush-8:0	20:50:12	0
2019294	99	47	41,5	cyclictest	2269573	-21	kworker/u8:3+events_unbound	23:30:26	0
2019294	99	47	39,6	cyclictest	2323797	-21	ntpq	00:10:22	0
2019297	99	46	36,8	cyclictest	2156200	-21	diskstats	21:25:11	1
2019297	99	46	36,8	cyclictest	2156200	-21	diskstats	21:25:11	1
2019294	99	46	35,9	cyclictest	2239300	-21	ntpq	22:45:21	0
2019302	99	45	41,3	cyclictest	2229904	-21	kworker/u8:1+events_unbound	23:10:13	2
2019294	99	45	36,7	cyclictest	2076336	-21	latency_hist	20:05:00	0
2019302	99	44	39,4	cyclictest	2269573	-21	kworker/u8:3+events_unbound	00:25:30	2
2019297	99	44	38,4	cyclictest	2170870	-21	apt-get	21:40:08	1
2019297	99	44	37,5	cyclictest	1986896	-21	kworker/u8:1+flush-8:0	19:20:22	1
2019294	99	44	36,6	cyclictest	1704890	-21	systemd-journal	19:15:00	0
2019297	99	43	33,8	cyclictest	1704890	-21	systemd-journal	23:25:01	1
2019294	99	43	32,2	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	22:05:25	0
2019302	99	42	38,3	cyclictest	2195268	-21	kworker/u8:2+events_unbound	22:40:31	2
2019297	99	42	34,6	cyclictest	1704890	-21	systemd-journal	20:39:41	1
2019294	99	42	36,4	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	22:30:22	0
2019297	99	41	37,3	cyclictest	2081493	-21	kworker/u8:0+flush-8:0	20:25:23	1
2019297	99	41	36,3	cyclictest	674386	-21	kworker/u8:2+flush-8:0	19:55:17	1
2019294	99	41	35,5	cyclictest	2195268	-21	kworker/u8:2+flush-8:0	22:50:37	0
2019302	99	40	33,5	cyclictest	1704890	-21	systemd-journal	22:25:01	2
2019294	99	40	35,4	cyclictest	2081493	-21	kworker/u8:0+events_unbound	20:40:26	0
2019294	99	40	34,4	cyclictest	2195268	-21	kworker/u8:2+flush-8:0	00:25:12	0
2019302	99	39	35,3	cyclictest	2036478	-21	kworker/u8:3+events_unbound	19:30:16	2
2019297	99	39	34,4	cyclictest	2269573	-21	kworker/u8:3+flush-8:0	23:35:24	1
2019297	99	39	33,4	cyclictest	2045806	-21	kworker/u8:1+flush-8:0	21:45:32	1
2019297	99	39	29,8	cyclictest	1704890	-21	systemd-journal	23:01:50	1
2019297	99	39	28,9	cyclictest	2050421	-21	ntpq	19:35:23	1
2019294	99	39	35,3	cyclictest	2220374	-21	kworker/u8:0+events_unbound	23:15:24	0
2019294	99	39	34,4	cyclictest	2220374	-21	kworker/u8:0+flush-8:0	23:05:26	0
2019294	99	39	34,4	cyclictest	2195268	-21	kworker/u8:2+flush-8:0	00:15:21	0
2019294	99	39	34,3	cyclictest	2045806	-21	kworker/u8:1+events_unbound	19:50:13	0
2019294	99	39	33,4	cyclictest	2106335	-21	kworker/u8:2+events_unbound	20:55:25	0
2019302	99	38	34,3	cyclictest	2220374	-21	kworker/u8:0+events_unbound	23:06:38	2
2019302	99	38	28,8	cyclictest	2225344	-21	cat	22:35:00	2
2019297	99	37	30,5	cyclictest	2023266	-21	ntpq	19:10:21	1
2019297	99	37	28,6	cyclictest	2120972	-21	latency_hist	20:50:01	1
2019294	99	37	29,6	cyclictest	2042202	-21	ps	19:30:15	0
2018791	2	37	3,9	sleep1	0	-21	swapper/1	19:06:10	1
2014255	2	37	4,8	sleep2	0	-21	swapper/2	19:05:02	2
2019294	99	36	31,4	cyclictest	2045806	-21	kworker/u8:1+flush-8:0	20:10:26	0
2019294	99	36	29,5	cyclictest	2349472	-21	apt-get	00:40:01	0
2019302	99	35	31,3	cyclictest	2141264	-21	kworker/u8:3+events_unbound	22:15:19	2
2019297	99	35	30,3	cyclictest	2196588	-21	irqrtprio	22:05:15	1
2019294	99	35	30,3	cyclictest	2245722	-21	diskstats	22:55:11	0
2019294	99	35	29,4	cyclictest	2045806	-21	kworker/u8:1+flush-8:0	22:00:12	0
2019294	99	35	27,6	cyclictest	2101649	-21	diskstats	20:30:11	0
2019294	99	35	27,6	cyclictest	2036478	-21	kworker/u8:3+flush-8:0	20:20:20	0
2117218	2	34	0,4	sleep3	75	-21	kworker/3:1-events	20:45:15	3
2019302	99	34	29,4	cyclictest	2141264	-21	kworker/u8:3+events_unbound	21:22:14	2
2019297	99	34	26,6	cyclictest	2220612	-21	apt-get	22:30:07	1
2019294	99	34	30,3	cyclictest	2195268	-21	kworker/u8:2+flush-8:0	23:35:16	0
2019294	99	34	30,3	cyclictest	2051333	-21	cron	19:40:01	0
2019294	99	34	29,3	cyclictest	2165504	-21	kworker/u8:0+flush-8:0	21:35:28	0
2019294	99	34	26,2	cyclictest	2045806	-21	kworker/u8:1+events_unbound	19:44:25	0
2019302	99	33	28,3	cyclictest	2081493	-21	kworker/u8:0+events_unbound	20:45:07	2
2019297	99	33	29,3	cyclictest	2141264	-21	kworker/u8:3+flush-8:0	22:20:15	1
2019297	99	33	28,4	cyclictest	2229904	-21	kworker/u8:1+flush-8:0	22:56:21	1
2019297	99	33	25,6	cyclictest	1704890	-21	systemd-journal	19:15:05	1
2019297	99	33	24,7	cyclictest	2056290	-21	latency_hist	19:45:01	1
2019297	99	33	23,8	cyclictest	1704890	-21	systemd-journal	00:35:24	1
2019294	99	33	29,3	cyclictest	2275385	-21	kworker/u8:1+events_unbound	23:45:24	0
2019294	99	33	29,3	cyclictest	2106335	-21	kworker/u8:2+events_unbound	21:05:25	0
2019294	99	33	29,3	cyclictest	2081493	-21	kworker/u8:0+events_unbound	20:25:28	0
2019294	99	33	29,2	cyclictest	2068862	-21	kthreadcore	19:55:18	0
2019302	99	32	28,3	cyclictest	674386	-21	kworker/u8:2+events_unbound	19:35:14	2
2019297	99	32	20,9	cyclictest	1704890	-21	systemd-journal	20:55:41	1
2019294	99	32	27,4	cyclictest	2081493	-21	kworker/u8:0+events_unbound	20:35:25	0
2019294	99	32	27,3	cyclictest	2195268	-21	kworker/u8:2+flush-8:0	22:19:53	0
2019294	99	32	26,5	cyclictest	2269573	-21	kworker/u8:3+flush-8:0	23:40:19	0
2019302	99	31	27,3	cyclictest	2269573	-21	kworker/u8:3+events_unbound	23:25:39	2
2019302	99	31	25,4	cyclictest	2254921	-21	unixbench_singl	23:00:28	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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