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 Fri Jun 12, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2909614	2	198	0,2	sleep3	47	1	rcuc/3	21:20:40	3
2774848	2	76	0,3	chrt	2774851	-21	unixbench_singl	19:05:51	2
2830639	2	72	0,5	sleep2	0	-21	swapper/2	20:00:37	2
2775370	99	70	48,19	cyclictest	3075346	-21	apt-get	00:10:00	0
2905354	2	63	0,3	sleep3	75	-21	kworker/3:1-events	21:15:43	3
2775373	99	63	55,6	cyclictest	3019634	-21	ntpq	23:10:39	1
2775373	99	62	55,5	cyclictest	3025168	-21	kworker/u8:0+flush-8:0	00:35:42	1
2775370	99	62	42,17	cyclictest	2875660	-21	ntpq	20:45:40	0
2775374	99	61	39,19	cyclictest	3065457	-21	cp	00:00:01	2
2775370	99	58	48,8	cyclictest	2856971	-21	/usr/sbin/munin	20:30:37	0
2775373	99	57	51,4	cyclictest	2915245	-21	kworker/u8:0+flush-8:0	21:50:30	1
2775373	99	57	45,9	cyclictest	2915170	-21	ntpq	21:25:40	1
2932269	2	56	0,4	chrt	48	1	ktimers/3	21:45:36	3
2775370	99	56	45,8	cyclictest	2955107	-21	ntpq	22:05:43	0
2775373	99	55	50,3	cyclictest	2965757	-21	kworker/u8:1+flush-8:0	22:35:31	1
2775373	99	54	47,5	cyclictest	2950698	-21	kworker/u8:3+flush-8:0	22:10:47	1
2775373	99	54	47,5	cyclictest	2870764	-21	ntpq	20:40:43	1
2775370	99	54	43,8	cyclictest	3065419	-21	cp	00:00:00	0
2775373	99	53	47,3	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	20:55:37	1
2775373	99	52	46,4	cyclictest	2851987	-21	kworker/u8:2+events_unbound	20:30:45	1
2775370	99	52	40,9	cyclictest	2779365	-21	ntpq	19:10:41	0
2775373	99	51	45,4	cyclictest	3025168	-21	kworker/u8:0+events_unbound	00:05:45	1
2775373	99	51	44,5	cyclictest	2780272	-21	latency_hist	19:15:01	1
3041704	2	50	0,5	chrt	0	-21	swapper/3	23:35:36	3
2797979	2	50	0,4	chrt	0	-21	swapper/0	19:30:34	0
2775374	99	50	41,6	cyclictest	2961332	-21	cat	22:15:00	2
2775373	99	50	44,5	cyclictest	2915245	-21	kworker/u8:0+flush-8:0	22:30:36	1
2775373	99	49	43,4	cyclictest	3035318	-21	kworker/u8:3+flush-8:0	23:30:46	1
2775373	99	49	42,5	cyclictest	3025168	-21	kworker/u8:0+events_unbound	00:25:44	1
2775373	99	49	39,7	cyclictest	3035318	-21	kworker/u8:3+events_unbound	23:40:41	1
2775373	99	48	42,4	cyclictest	3025504	-21	apt-get	23:20:04	1
2775373	99	48	39,7	cyclictest	2826982	-21	latency_hist	20:00:01	1
2775370	99	48	35,10	cyclictest	3014724	-21	ntpq	23:05:42	0
2775370	99	48	35,10	cyclictest	3014724	-21	ntpq	23:05:41	0
2775373	99	47	43,3	cyclictest	2896971	-21	kworker/u8:1+flush-8:0	21:20:31	1
2775373	99	47	42,3	cyclictest	2915245	-21	kworker/u8:0+flush-8:0	22:20:33	1
2775373	99	47	41,4	cyclictest	3015831	-21	kworker/u8:2+events_unbound	23:35:43	1
2775373	99	47	38,6	cyclictest	2905304	-21	ntpq	21:15:41	1
2775373	99	47	37,7	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	21:05:40	1
2775373	99	46	40,4	cyclictest	3000435	-21	kworker/u8:1+flush-8:0	23:50:36	1
2775373	99	46	40,4	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	20:10:47	1
2775373	99	46	38,5	cyclictest	2896971	-21	kworker/u8:1+events_unbound	21:35:43	1
2775373	99	46	37,6	cyclictest	2995801	-21	latency_hist	22:50:01	1
2775373	99	45	39,4	cyclictest	2826621	-21	kworker/u8:0+events_unbound	20:50:42	1
2775373	99	45	39,3	cyclictest	2950698	-21	kworker/u8:3+flush-8:0	22:05:47	1
2775373	99	45	38,4	cyclictest	3000435	-21	kworker/u8:1+events_unbound	22:55:31	1
2775373	99	45	35,7	cyclictest	1704890	-21	systemd-journal	22:20:00	1
2775370	99	45	39,5	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	20:15:43	0
2775374	99	44	28,14	cyclictest	2876880	-21	aten2_r5power_p	20:50:29	2
2775373	99	44	40,3	cyclictest	2826621	-21	kworker/u8:0+flush-8:0	20:00:44	1
2775373	99	44	38,4	cyclictest	2926267	-21	kworker/u8:2+flush-8:0	21:40:36	1
2775370	99	44	37,5	cyclictest	3100281	-21	latency_hist	00:35:01	0
2775374	99	43	33,8	cyclictest	1704890	-21	systemd-journal	21:18:37	2
2775373	99	43	38,4	cyclictest	2826621	-21	kworker/u8:0+events_unbound	20:05:44	1
2775373	99	43	37,4	cyclictest	3095015	-21	kworker/u8:1+events_unbound	00:30:40	1
2775373	99	43	36,5	cyclictest	3015831	-21	kworker/u8:2+events_unbound	23:15:46	1
2775373	99	43	32,7	cyclictest	1704890	-21	systemd-journal	00:19:40	1
2775374	99	42	32,8	cyclictest	1704890	-21	systemd-journal	00:10:41	2
2775373	99	42	37,4	cyclictest	2926267	-21	kworker/u8:2+events_unbound	21:45:31	1
2775373	99	42	37,4	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	20:20:31	1
2775373	99	42	37,3	cyclictest	2826621	-21	kworker/u8:0+flush-8:0	21:00:36	1
2775373	99	42	37,3	cyclictest	2826621	-21	kworker/u8:0+flush-8:0	21:00:35	1
2775373	99	42	35,5	cyclictest	3030990	-21	apt-get	23:25:26	1
2775373	99	42	34,6	cyclictest	2915245	-21	kworker/u8:0+flush-8:0	21:30:36	1
2775373	99	42	34,5	cyclictest	1952109	-21	kworker/u8:1+flush-8:0	19:25:47	1
2775373	99	41	35,4	cyclictest	2915245	-21	kworker/u8:0+events_unbound	23:05:44	1
2775373	99	41	35,4	cyclictest	2915245	-21	kworker/u8:0+events_unbound	23:05:44	1
2775370	99	41	34,5	cyclictest	3025168	-21	kworker/u8:0+flush-8:0	23:20:36	0
2775370	99	41	31,7	cyclictest	3095344	-21	latency_hist	00:30:00	0
2775370	99	41	29,9	cyclictest	2852288	-21	diskstats	20:25:31	0
2775373	99	40	33,5	cyclictest	2782424	-21	kworker/u8:3+events_unbound	19:15:38	1
2775373	99	40	29,9	cyclictest	3089448	-21	ntpq	00:20:40	1
2775370	99	40	35,3	cyclictest	2915245	-21	kworker/u8:0+flush-8:0	22:40:47	0
2775370	99	40	2,32	cyclictest	2856754	-21	kworker/0:0+events	21:50:17	0
2775374	99	39	24,13	cyclictest	2787669	-21	cpuspeed_turbos	19:20:31	2
2775374	99	39	24,13	cyclictest	2787669	-21	cpuspeed_turbos	19:20:30	2
2775374	99	39	18,18	cyclictest	1704890	-21	systemd-journal	20:09:59	2
2775373	99	39	35,3	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	20:45:44	1
2775373	99	39	32,5	cyclictest	2926267	-21	kworker/u8:2+flush-8:0	21:55:42	1
2775370	99	39	31,6	cyclictest	3005969	-21	/usr/sbin/munin	23:00:41	0
2775370	99	38	25,10	cyclictest	2802528	-21	diskstats	19:35:31	0
2775370	99	38	17,19	cyclictest	2856754	-21	kworker/0:0+events	21:35:39	0
2775370	99	38	1,32	cyclictest	3045593	-21	kworker/0:1+events	00:10:08	0
2775374	99	37	22,13	cyclictest	3095677	-21	aten2_r5power_e	00:30:27	2
2775373	99	37	31,4	cyclictest	3065738	-21	apt-get	00:00:27	1
2775373	99	37	30,4	cyclictest	1704890	-21	systemd-journal	22:43:40	1
2775370	99	37	29,6	cyclictest	1704890	-21	systemd-journal	23:32:58	0
2775370	99	37	29,6	cyclictest	1704890	-21	systemd-journal	00:05:00	0
2775370	99	37	27,8	cyclictest	2910254	-21	ntpq	21:20:43	0
2775374	99	36	1,28	cyclictest	2978839	-21	kthreadcore	22:30:43	2
2775374	99	36	0,21	cyclictest	2810067	2	kthreadcore	19:40:38	2
2775373	99	36	31,3	cyclictest	2926267	-21	kworker/u8:2+flush-8:0	22:00:37	1
2775373	99	36	30,4	cyclictest	2782424	-21	kworker/u8:3+flush-8:0	19:30:30	1
2775373	99	36	29,4	cyclictest	3008369	-21	kworker/u8:3+events_unbound	23:00:46	1
2775373	99	36	28,6	cyclictest	2801975	-21	kworker/u8:0+events_unbound	19:40:41	1
2775370	99	36	3,31	cyclictest	3030730	-21	kworker/0:0+events	23:45:43	0
2775370	99	36	28,6	cyclictest	2950118	-21	ntpq	22:00:40	0
2774981	2	36	4,10	sleep1	0	-21	swapper/1	19:07:08	1
2775374	99	35	21,12	cyclictest	2896939	-21	fschecks_time	21:10:30	2
2775374	99	35	1,28	cyclictest	2952874	-21	kthreadcore	22:05:39	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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