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 Mon Jun 08, 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
3866056	2	165	0,4	sleep3	75	-21	kworker/3:1-events	23:50:40	3
3866056	2	165	0,4	sleep3	75	-21	kworker/3:1-events	23:50:39	3
3633507	2	71	0,4	sleep3	75	-21	kworker/3:1-events	19:55:40	3
3584077	99	56	49,5	cyclictest	3625717	-21	latency_hist	19:50:01	1
3584077	99	56	49,5	cyclictest	3531218	-21	kworker/u8:2+events_unbound	23:15:50	1
3584073	99	54	43,9	cyclictest	3664532	-21	ntpq	20:25:45	0
3584077	99	52	43,7	cyclictest	1704890	-21	systemd-journal	23:35:00	1
3584078	99	51	47,3	cyclictest	3724930	-21	kworker/u8:3+events_unbound	21:30:34	2
3584077	99	51	44,5	cyclictest	3873612	-21	kworker/u8:3+flush-8:0	00:20:46	1
3584073	99	51	45,3	cyclictest	3531218	-21	kworker/u8:2+events_unbound	22:55:33	0
3584073	99	49	43,4	cyclictest	3730176	-21	kworker/u8:0+events_unbound	22:10:34	0
3584078	99	48	43,3	cyclictest	3705501	-21	kworker/u8:1+events_unbound	21:10:33	2
3584077	99	48	41,5	cyclictest	3531218	-21	kworker/u8:2+events_unbound	20:00:46	1
3584077	99	48	36,9	cyclictest	3700015	-21	apt-get	21:05:01	1
3584077	99	47	41,4	cyclictest	3873612	-21	kworker/u8:3+events_unbound	00:10:46	1
3584073	99	47	40,5	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	19:50:47	0
3584073	99	47	40,4	cyclictest	2741928	-21	kworker/u8:0+flush-8:0	20:05:37	0
3632508	2	46	0,7	sleep2	0	-21	swapper/2	19:55:39	2
3584078	99	46	41,4	cyclictest	3531218	-21	kworker/u8:2+events_unbound	00:25:40	2
3584078	99	46	38,6	cyclictest	3631029	-21	base64	19:55:01	2
3584077	99	46	42,3	cyclictest	2741928	-21	kworker/u8:0+flush-8:0	19:35:48	1
3584077	99	46	34,9	cyclictest	3893411	-21	ntpq	00:15:45	1
3584077	99	46	34,9	cyclictest	1704890	-21	systemd-journal	22:48:57	1
3584078	99	45	41,3	cyclictest	3531218	-21	kworker/u8:2+events_unbound	00:15:48	2
3584077	99	45	37,5	cyclictest	3680287	-21	latency_hist	20:45:01	1
3584073	99	45	39,4	cyclictest	3578692	-21	kworker/u8:3+events_unbound	19:20:48	0
3584073	99	45	35,8	cyclictest	3823488	-21	ntpq	23:05:44	0
3584077	99	44	39,4	cyclictest	3531218	-21	kworker/u8:2+events_unbound	21:20:34	1
3584077	99	44	37,5	cyclictest	3764186	-21	kworker/u8:3+flush-8:0	22:20:45	1
3584077	99	44	36,6	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	22:40:46	1
3584077	99	43	37,4	cyclictest	3531218	-21	kworker/u8:2+events_unbound	19:50:46	1
3584077	99	43	34,7	cyclictest	3873545	-21	ntpq	23:55:44	1
3584077	99	43	32,8	cyclictest	3774062	-21	ntpq	22:15:45	1
3584077	99	42	37,4	cyclictest	2741928	-21	kworker/u8:0+events_unbound	20:14:59	1
3584077	99	42	35,5	cyclictest	3578692	-21	kworker/u8:3+flush-8:0	19:25:46	1
3584077	99	42	35,5	cyclictest	2741928	-21	kworker/u8:0+events_unbound	20:45:45	1
3584078	99	41	32,6	cyclictest	3589104	-21	cat	19:15:00	2
3584077	99	41	35,4	cyclictest	1704890	-21	systemd-journal	23:20:58	1
3584073	99	41	36,4	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	20:30:37	0
3584077	99	40	35,4	cyclictest	3899080	-21	kworker/u8:1+events_unbound	00:31:57	1
3584077	99	40	33,5	cyclictest	2741928	-21	kworker/u8:0+events_unbound	20:05:52	1
3584077	99	40	32,5	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	21:25:51	1
3584077	99	40	31,6	cyclictest	3750254	-21	latency_hist	21:55:02	1
3584077	99	39	35,3	cyclictest	3730176	-21	kworker/u8:0+events_unbound	23:40:42	1
3584077	99	39	34,3	cyclictest	3705501	-21	kworker/u8:1+events_unbound	21:45:48	1
3584077	99	39	33,4	cyclictest	3730176	-21	kworker/u8:0+events_unbound	22:30:45	1
3584077	99	39	33,4	cyclictest	2741928	-21	kworker/u8:0+events_unbound	20:15:43	1
3584077	99	39	32,5	cyclictest	3730176	-21	kworker/u8:0+events_unbound	23:05:48	1
3584078	99	38	34,3	cyclictest	3578692	-21	kworker/u8:3+events_unbound	20:35:37	2
3584077	99	38	31,5	cyclictest	3787823	-21	kworker/u8:1+flush-8:0	22:35:45	1
3584077	99	38	31,5	cyclictest	3531218	-21	kworker/u8:2+events_unbound	23:10:49	1
3584077	99	38	31,4	cyclictest	3730176	-21	kworker/u8:0+flush-8:0	22:50:49	1
3584078	99	37	33,3	cyclictest	3899080	-21	kworker/u8:1+events_unbound	00:35:42	2
3584077	99	37	32,4	cyclictest	3730176	-21	kworker/u8:0+flush-8:0	22:10:32	1
3584073	99	37	31,4	cyclictest	2741928	-21	kworker/u8:0+flush-8:0	20:15:35	0
3584073	99	37	27,8	cyclictest	3839416	-21	latency_hist	23:25:00	0
3584073	99	37	26,9	cyclictest	1704890	-21	systemd-journal	23:30:37	0
3584077	99	36	31,3	cyclictest	3635243	-21	/usr/sbin/munin	19:55:49	1
3584077	99	36	28,6	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	23:50:45	1
3584077	99	36	28,6	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	23:50:44	1
3584077	99	36	27,6	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	00:35:47	1
3584073	99	36	31,4	cyclictest	3705501	-21	kworker/u8:1+flush-8:0	21:45:34	0
3584073	99	36	31,4	cyclictest	2741928	-21	kworker/u8:0+events_unbound	20:10:48	0
3584073	99	36	26,8	cyclictest	3863412	-21	ntpq	23:45:44	0
3584073	99	36	26,8	cyclictest	3863412	-21	ntpq	23:45:44	0
3584077	99	35	30,3	cyclictest	3764186	-21	kworker/u8:3+events_unbound	22:10:01	1
3584077	99	35	29,4	cyclictest	3705501	-21	kworker/u8:1+events_unbound	21:30:42	1
3584077	99	35	29,4	cyclictest	3531218	-21	kworker/u8:2+events_unbound	19:30:47	1
3584077	99	35	28,5	cyclictest	3730176	-21	kworker/u8:0+flush-8:0	22:00:36	1
3584077	99	35	27,6	cyclictest	3705501	-21	kworker/u8:1+flush-8:0	21:40:46	1
3584077	99	35	27,6	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	22:55:46	1
3584077	99	35	0,33	cyclictest	1	-21	systemd	19:15:01	1
3584073	99	35	26,7	cyclictest	3601283	-21	/usr/sbin/munin	19:25:43	0
3584077	99	34	27,5	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	23:00:46	1
3584073	99	34	26,5	cyclictest	3779924	-21	latency_hist	22:25:01	0
3584073	99	34	25,7	cyclictest	3854755	-21	/usr/sbin/munin	23:40:42	0
3584078	99	33	26,5	cyclictest	1704890	-21	systemd-journal	19:25:00	2
3584077	99	33	27,4	cyclictest	3730176	-21	kworker/u8:0+events_unbound	23:35:32	1
3584077	99	33	26,5	cyclictest	3578692	-21	kworker/u8:3+flush-8:0	20:55:35	1
3584077	99	33	24,7	cyclictest	1704890	-21	systemd-journal	21:05:58	1
3584077	99	33	23,8	cyclictest	1704890	-21	systemd-journal	21:13:57	1
3584077	99	33	22,8	cyclictest	3594982	-21	ntpq	19:15:46	1
3584073	99	33	29,3	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	20:22:00	0
3584073	99	33	29,3	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	20:21:59	0
3584073	99	33	27,4	cyclictest	3578692	-21	kworker/u8:3+flush-8:0	20:40:37	0
3584073	99	33	25,6	cyclictest	3789791	-21	latency_hist	22:35:00	0
3584073	99	33	25,6	cyclictest	2741928	-21	kworker/u8:0+flush-8:0	19:10:44	0
3584078	99	32	25,5	cyclictest	3829712	-21	cp	23:15:00	2
3584077	99	32	27,4	cyclictest	3705501	-21	kworker/u8:1+events_unbound	21:40:01	1
3584077	99	32	26,4	cyclictest	3873612	-21	kworker/u8:3+flush-8:0	00:00:38	1
3584077	99	32	26,4	cyclictest	3873612	-21	kworker/u8:3+flush-8:0	00:00:37	1
3584077	99	32	26,4	cyclictest	3531218	-21	kworker/u8:2+flush-8:0	20:30:47	1
3584073	99	32	27,3	cyclictest	3635817	-21	apt	20:00:00	0
3584077	99	31	27,3	cyclictest	3764186	-21	kworker/u8:3+flush-8:0	22:25:36	1
3584077	99	31	26,3	cyclictest	3901671	-21	kthreadcore	00:25:41	1
3584077	99	31	24,5	cyclictest	3578692	-21	kworker/u8:3+flush-8:0	20:50:37	1
3584077	99	31	23,6	cyclictest	3616131	-21	apt-get	19:40:29	1
3584073	99	31	25,4	cyclictest	2741928	-21	kworker/u8:0+events_unbound	19:39:59	0
3584073	99	31	24,5	cyclictest	3705501	-21	kworker/u8:1+events_unbound	21:40:33	0
3584073	99	31	22,6	cyclictest	1704890	-21	systemd-journal	23:15:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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